field public static final int actionModePasteDrawable = 16843539; // 0x1010313
field public static final int actionModeSelectAllDrawable = 16843648; // 0x1010380
field public static final int actionOverflowButtonStyle = 16843510; // 0x10102f6
+ field public static final int actionProviderClass = 16843678; // 0x101039e
field public static final int actionViewClass = 16843516; // 0x10102fc
field public static final int activatedBackgroundIndicator = 16843517; // 0x10102fd
field public static final int activityCloseEnterAnimation = 16842938; // 0x10100ba
method public abstract boolean onPrepareActionMode(android.view.ActionMode, android.view.Menu);
}
+ public abstract class ActionProvider {
+ ctor public ActionProvider(android.content.Context);
+ method public abstract android.view.View onCreateActionView();
+ method public void onPerformDefaultAction(android.view.View);
+ }
+
public abstract interface ContextMenu implements android.view.Menu {
method public abstract void clearHeader();
method public abstract android.view.ContextMenu setHeaderIcon(int);
public abstract interface MenuItem {
method public abstract boolean collapseActionView();
method public abstract boolean expandActionView();
+ method public abstract android.view.ActionProvider getActionProvider();
method public abstract android.view.View getActionView();
method public abstract char getAlphabeticShortcut();
method public abstract int getGroupId();
method public abstract boolean isChecked();
method public abstract boolean isEnabled();
method public abstract boolean isVisible();
+ method public abstract android.view.MenuItem setActionProvider(android.view.ActionProvider);
method public abstract android.view.MenuItem setActionView(android.view.View);
method public abstract android.view.MenuItem setActionView(int);
method public abstract android.view.MenuItem setAlphabeticShortcut(char);
method public abstract void onStopTrackingTouch(android.widget.SeekBar);
}
+ public class ShareActionProvider extends android.view.ActionProvider {
+ ctor public ShareActionProvider(android.content.Context);
+ method public android.view.View onCreateActionView();
+ method public void setShareHistoryFileName(java.lang.String);
+ method public void setShareIntent(android.view.View, android.content.Intent);
+ field public static final java.lang.String DEFAULT_SHARE_HISTORY_FILE_NAME = "share_history.xml";
+ }
+
public class SimpleAdapter extends android.widget.BaseAdapter implements android.widget.Filterable {
ctor public SimpleAdapter(android.content.Context, java.util.List<? extends java.util.Map<java.lang.String, ?>>, int, java.lang.String[], int[]);
method public int getCount();
--- /dev/null
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+import android.content.Context;
+
+/**
+ * This class is a mediator for accomplishing a given task, for example sharing a file.
+ * It is responsible for creating a view that performs an action that accomplishes the task.
+ * This class also implements other functions such a performing a default action.
+ * <p>
+ * An ActionProvider can be optionally specified for a {@link MenuItem} and in such a
+ * case it will be responsible for creating the action view that appears in the
+ * {@link android.app.ActionBar} as a substitute for the menu item when the item is
+ * displayed as an action item. Also the provider is responsible for performing a
+ * default action if a menu item placed on the overflow menu of the ActionBar is
+ * selected and none of the menu item callbacks has handled the selection.
+ * </p>
+ * <p>
+ * There are two ways for using an action provider for creating and handling of action views:
+ * <ul>
+ * <li>
+ * Setting the action provider on a {@link MenuItem} directly by calling
+ * {@link MenuItem#setActionProvider(ActionProvider)}.
+ * </li>
+ * <li>
+ * Declaring the action provider in the menu XML resource. For example:
+ * <pre>
+ * <code>
+ * <item android:id="@+id/my_menu_item"
+ * android:title="Title"
+ * android:icon="@drawable/my_menu_item_icon"
+ * android:showAsAction="ifRoom"
+ * android:actionProviderClass="foo.bar.SomeActionProvider" />
+ * </code>
+ * </pre>
+ * </li>
+ * </ul>
+ * </p>
+ *
+ * @see MenuItem#setActionProvider(ActionProvider)
+ * @see MenuItem#getActionProvider()
+ */
+public abstract class ActionProvider {
+
+ /**
+ * Creates a new instance.
+ *
+ * @param context Context for accessing resources.
+ */
+ public ActionProvider(Context context) {
+ }
+
+ /**
+ * Factory method for creating new action views.
+ *
+ * @return A new action view.
+ */
+ public abstract View onCreateActionView();
+
+ /**
+ * Performs an optional default action.
+ * <p>
+ * For the case of an action provider placed in a menu item not shown as an action this
+ * method is invoked if none of the callbacks for processing menu selection has handled
+ * the event.
+ * </p>
+ * <p>
+ * A menu item selection is processed in the following order:
+ * <ul>
+ * <li>
+ * Receiving a call to {@link MenuItem.OnMenuItemClickListener#onMenuItemClick
+ * MenuItem.OnMenuItemClickListener.onMenuItemClick}.
+ * </li>
+ * <li>
+ * Receiving a call to {@link android.app.Activity#onOptionsItemSelected(MenuItem)
+ * Activity.onOptionsItemSelected(MenuItem)}
+ * </li>
+ * <li>
+ * Receiving a call to {@link android.app.Fragment#onOptionsItemSelected(MenuItem)
+ * Fragment.onOptionsItemSelected(MenuItem)}
+ * </li>
+ * <li>
+ * Launching the {@link android.content.Intent} set via
+ * {@link MenuItem#setIntent(android.content.Intent) MenuItem.setIntent(android.content.Intent)}
+ * </li>
+ * <li>
+ * Invoking this method.
+ * </li>
+ * </ul>
+ * </p>
+ * <p>
+ * The default implementation does not perform any action.
+ * </p>
+ *
+ * @param actionView A view created by {@link #onCreateActionView()}.
+ */
+ public void onPerformDefaultAction(View actionView) {
+ }
+}
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.util.AttributeSet;
+import android.util.Log;
import android.util.Xml;
import java.io.IOException;
* <em>something</em> file.)
*/
public class MenuInflater {
+ private static final String LOG_TAG = "MenuInflater";
+
/** Menu tag name in XML. */
private static final String XML_MENU = "menu";
private static final int NO_ID = 0;
- private static final Class<?>[] ACTION_VIEW_CONSTRUCTOR_SIGNATURE = new Class[]{Context.class};
+ private static final Class<?>[] ACTION_VIEW_CONSTRUCTOR_SIGNATURE = new Class[] {Context.class};
+
+ private static final Class<?>[] ACTION_PROVIDER_CONSTRUCTOR_SIGNATURE = ACTION_VIEW_CONSTRUCTOR_SIGNATURE;
+
+ private final Object[] mActionViewConstructorArguments;
+
+ private final Object[] mActionProviderConstructorArguments;
private Context mContext;
-
+
/**
* Constructs a menu inflater.
*
*/
public MenuInflater(Context context) {
mContext = context;
+ mActionViewConstructorArguments = new Object[] {context};
+ mActionProviderConstructorArguments = mActionViewConstructorArguments;
}
/**
private static class InflatedOnMenuItemClickListener
implements MenuItem.OnMenuItemClickListener {
- private static final Class[] PARAM_TYPES = new Class[] { MenuItem.class };
+ private static final Class<?>[] PARAM_TYPES = new Class[] { MenuItem.class };
private Context mContext;
private Method mMethod;
public InflatedOnMenuItemClickListener(Context context, String methodName) {
mContext = context;
- Class c = context.getClass();
+ Class<?> c = context.getClass();
try {
mMethod = c.getMethod(methodName, PARAM_TYPES);
} catch (Exception e) {
private int itemActionViewLayout;
private String itemActionViewClassName;
-
+ private String itemActionProviderClassName;
+
private String itemListenerMethodName;
private static final int defaultGroupId = NO_ID;
itemListenerMethodName = a.getString(com.android.internal.R.styleable.MenuItem_onClick);
itemActionViewLayout = a.getResourceId(com.android.internal.R.styleable.MenuItem_actionLayout, 0);
itemActionViewClassName = a.getString(com.android.internal.R.styleable.MenuItem_actionViewClass);
-
+ itemActionProviderClassName = a.getString(com.android.internal.R.styleable.MenuItem_actionProviderClass);
+
a.recycle();
-
+
itemAdded = false;
}
}
}
+ boolean actionViewSpecified = false;
if (itemActionViewClassName != null) {
- try {
- final Class<?> clazz = Class.forName(itemActionViewClassName, true,
- mContext.getClassLoader());
- Constructor<?> c = clazz.getConstructor(ACTION_VIEW_CONSTRUCTOR_SIGNATURE);
- item.setActionView((View) c.newInstance(mContext));
- } catch (Exception e) {
- throw new InflateException(e);
+ View actionView = (View) newInstance(itemActionViewClassName,
+ ACTION_VIEW_CONSTRUCTOR_SIGNATURE, mActionViewConstructorArguments);
+ item.setActionView(actionView);
+ actionViewSpecified = true;
+ }
+ if (itemActionViewLayout > 0) {
+ if (!actionViewSpecified) {
+ item.setActionView(itemActionViewLayout);
+ actionViewSpecified = true;
+ } else {
+ Log.w(LOG_TAG, "Ignoring attribute 'itemActionViewLayout'."
+ + " Action view already specified.");
+ }
+ }
+ if (itemActionProviderClassName != null) {
+ if (!actionViewSpecified) {
+ ActionProvider actionProvider = newInstance(itemActionProviderClassName,
+ ACTION_PROVIDER_CONSTRUCTOR_SIGNATURE,
+ mActionProviderConstructorArguments);
+ item.setActionProvider(actionProvider);
+ } else {
+ Log.w(LOG_TAG, "Ignoring attribute 'itemActionProviderClass'."
+ + " Action view already specified.");
}
- } else if (itemActionViewLayout > 0) {
- item.setActionView(itemActionViewLayout);
}
}
-
+
public void addItem() {
itemAdded = true;
setItem(menu.add(groupId, itemId, itemCategoryOrder, itemTitle));
public boolean hasAddedItem() {
return itemAdded;
}
+
+ @SuppressWarnings("unchecked")
+ private <T> T newInstance(String className, Class<?>[] constructorSignature,
+ Object[] arguments) {
+ try {
+ Class<?> clazz = mContext.getClassLoader().loadClass(className);
+ Constructor<?> constructor = clazz.getConstructor(constructorSignature);
+ return (T) constructor.newInstance(arguments);
+ } catch (Exception e) {
+ Log.w(LOG_TAG, "Cannot instantiate class: " + className, e);
+ }
+ return null;
+ }
}
-
}
* @see MenuItem#expandActionView()
* @see MenuItem#collapseActionView()
* @see MenuItem#setShowAsActionFlags(int)
- * @see MenuItem#
*/
public interface OnActionExpandListener {
/**
* Set an action view for this menu item. An action view will be displayed in place
* of an automatically generated menu item element in the UI when this item is shown
* as an action within a parent.
+ * <p>
+ * <strong>Note:</strong> Setting an action view overrides the action provider
+ * set via {@link #setActionProvider(ActionProvider)}.
+ * </p>
*
* @param view View to use for presenting this item to the user.
* @return This Item so additional setters can be called.
* Set an action view for this menu item. An action view will be displayed in place
* of an automatically generated menu item element in the UI when this item is shown
* as an action within a parent.
+ * <p>
+ * <strong>Note:</strong> Setting an action view overrides the action provider
+ * set via {@link #setActionProvider(ActionProvider)}.
+ * </p>
*
* @param resId Layout resource to use for presenting this item to the user.
* @return This Item so additional setters can be called.
public View getActionView();
/**
+ * Sets the {@link ActionProvider} responsible for creating an action view if
+ * the item is placed on the action bar. The provider also provides a default
+ * action invoked if the item is placed in the overflow menu.
+ * <p>
+ * <strong>Note:</strong> Setting an action provider overrides the action view
+ * set via {@link #setActionView(int)} or {@link #setActionView(View)}.
+ * </p>
+ *
+ * @param actionProvider The action provider.
+ * @return This Item so additional setters can be called.
+ *
+ * @see ActionProvider
+ */
+ public MenuItem setActionProvider(ActionProvider actionProvider);
+
+ /**
+ * Gets the {@link ActionProvider}.
+ *
+ * @return The action provider.
+ *
+ * @see ActionProvider
+ * @see #setActionProvider(ActionProvider)
+ */
+ public ActionProvider getActionProvider();
+
+ /**
* Expand the action view associated with this menu item.
* The menu item must have an action view set, as well as
* the showAsAction flag {@link #SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW}.
--- /dev/null
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.widget;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.database.DataSetObservable;
+import android.database.DataSetObserver;
+import android.os.AsyncTask;
+import android.os.Handler;
+import android.text.TextUtils;
+import android.util.Log;
+import android.util.Xml;
+
+import com.android.internal.content.PackageMonitor;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+import org.xmlpull.v1.XmlSerializer;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * <p>
+ * This class represents a data model for choosing a component for handing a
+ * given {@link Intent}. The model is responsible for querying the system for
+ * activities that can handle the given intent and order found activities
+ * based on historical data of previous choices. The historical data is stored
+ * in an application private file. If a client does not want to have persistent
+ * choice history the file can be omitted, thus the activities will be ordered
+ * based on historical usage for the current session.
+ * <p>
+ * </p>
+ * For each backing history file there is a singleton instance of this class. Thus,
+ * several clients that specify the same history file will share the same model. Note
+ * that if multiple clients are sharing the same model they should implement semantically
+ * equivalent functionality since setting the model intent will change the found
+ * activities and they may be inconsistent with the functionality of some of the clients.
+ * For example, choosing a share activity can be implemented by a single backing
+ * model and two different views for performing the selection. If however, one of the
+ * views is used for sharing but the other for importing, for example, then each
+ * view should be backed by a separate model.
+ * </p>
+ * <p>
+ * The way clients interact with this class is as follows:
+ * </p>
+ * <p>
+ * <pre>
+ * <code>
+ * // Get a model and set it to a couple of clients with semantically similar function.
+ * ActivityChooserModel dataModel =
+ * ActivityChooserModel.get(context, "task_specific_history_file_name.xml");
+ *
+ * ActivityChooserModelClient modelClient1 = getActivityChooserModelClient1();
+ * modelClient1.setActivityChooserModel(dataModel);
+ *
+ * ActivityChooserModelClient modelClient2 = getActivityChooserModelClient2();
+ * modelClient2.setActivityChooserModel(dataModel);
+ *
+ * // Set an intent to choose a an activity for.
+ * dataModel.setIntent(intent);
+ * <pre>
+ * <code>
+ * </p>
+ * <p>
+ * <strong>Note:</strong> This class is thread safe.
+ * </p>
+ *
+ * @hide
+ */
+public class ActivityChooserModel extends DataSetObservable {
+
+ /**
+ * Client that utilizes an {@link ActivityChooserModel}.
+ */
+ public interface ActivityChooserModelClient {
+
+ /**
+ * Sets the {@link ActivityChooserModel}.
+ *
+ * @param dataModel The model.
+ */
+ public void setActivityChooserModel(ActivityChooserModel dataModel);
+ }
+
+ /**
+ * Defines a sorter that is responsible for sorting the activities
+ * based on the provided historical choices and an intent.
+ */
+ public interface ActivitySorter {
+
+ /**
+ * Sorts the <code>activities</code> in descending order of relevance
+ * based on previous history and an intent.
+ *
+ * @param intent The {@link Intent}.
+ * @param activities Activities to be sorted.
+ * @param historicalRecords Historical records.
+ */
+ // This cannot be done by a simple comparator since an Activity weight
+ // is computed from history. Note that Activity implements Comparable.
+ public void sort(Intent intent, List<Activity> activities,
+ List<HistoricalRecord> historicalRecords);
+ }
+
+ /**
+ * Flag for selecting debug mode.
+ */
+ private static final boolean DEBUG = false;
+
+ /**
+ * Tag used for logging.
+ */
+ private static final String LOG_TAG = ActivityChooserModel.class.getSimpleName();
+
+ /**
+ * The root tag in the history file.
+ */
+ private static final String TAG_HISTORICAL_RECORDS = "historical-records";
+
+ /**
+ * The tag for a record in the history file.
+ */
+ private static final String TAG_HISTORICAL_RECORD = "historical-record";
+
+ /**
+ * Attribute for the activity.
+ */
+ private static final String ATTRIBUTE_ACTIVITY = "activity";
+
+ /**
+ * Attribute for the choice time.
+ */
+ private static final String ATTRIBUTE_TIME = "time";
+
+ /**
+ * Attribute for the choice weight.
+ */
+ private static final String ATTRIBUTE_WEIGHT = "weight";
+
+ /**
+ * The default name of the choice history file.
+ */
+ public static final String DEFAULT_HISTORY_FILE_NAME =
+ "activity_choser_model_history.xml";
+
+ /**
+ * The default maximal length of the choice history.
+ */
+ public static final int DEFAULT_HISTORY_MAX_LENGTH = 50;
+
+ /**
+ * The amount with which to inflate a chosen activity when set as default.
+ */
+ private static final int DEFAULT_ACTIVITY_INFLATION = 5;
+
+ /**
+ * Default weight for a choice record.
+ */
+ private static final float DEFAULT_HISTORICAL_RECORD_WEIGHT = 1.0f;
+
+ /**
+ * The extension of the history file.
+ */
+ private static final String HISTORY_FILE_EXTENSION = ".xml";
+
+ /**
+ * An invalid item index.
+ */
+ private static final int INVALID_INDEX = -1;
+
+ /**
+ * Lock to guard the model registry.
+ */
+ private static final Object sRegistryLock = new Object();
+
+ /**
+ * This the registry for data models.
+ */
+ private static final Map<String, ActivityChooserModel> sDataModelRegistry =
+ new HashMap<String, ActivityChooserModel>();
+
+ /**
+ * Lock for synchronizing on this instance.
+ */
+ private final Object mInstanceLock = new Object();
+
+ /**
+ * List of activities that can handle the current intent.
+ */
+ private final List<Activity> mActivitys = new ArrayList<Activity>();
+
+ /**
+ * List with historical choice records.
+ */
+ private final List<HistoricalRecord> mHistoricalRecords = new ArrayList<HistoricalRecord>();
+
+ /**
+ * Monitor for added and removed packages.
+ */
+ private final PackageMonitor mPackageMonitor = new DataModelPackageMonitor();
+
+ /**
+ * Context for accessing resources.
+ */
+ private final Context mContext;
+
+ /**
+ * The name of the history file that backs this model.
+ */
+ private final String mHistoryFileName;
+
+ /**
+ * The intent for which a activity is being chosen.
+ */
+ private Intent mIntent;
+
+ /**
+ * The sorter for ordering activities based on intent and past choices.
+ */
+ private ActivitySorter mActivitySorter = new DefaultSorter();
+
+ /**
+ * The maximal length of the choice history.
+ */
+ private int mHistoryMaxSize = DEFAULT_HISTORY_MAX_LENGTH;
+
+ /**
+ * Flag whether choice history can be read. In general many clients can
+ * share the same data model and {@link #readHistoricalData()} may be called
+ * by arbitrary of them any number of times. Therefore, this class guarantees
+ * that the very first read succeeds and subsequent reads can be performed
+ * only after a call to {@link #persistHistoricalData()} followed by change
+ * of the share records.
+ */
+ private boolean mCanReadHistoricalData = true;
+
+ /**
+ * Flag whether the choice history was read. This is used to enforce that
+ * before calling {@link #persistHistoricalData()} a call to
+ * {@link #persistHistoricalData()} has been made. This aims to avoid a
+ * scenario in which a choice history file exits, it is not read yet and
+ * it is overwritten. Note that always all historical records are read in
+ * full and the file is rewritten. This is necessary since we need to
+ * purge old records that are outside of the sliding window of past choices.
+ */
+ private boolean mReadShareHistoryCalled = false;
+
+ /**
+ * Flag whether the choice records have changed. In general many clients can
+ * share the same data model and {@link #persistHistoricalData()} may be called
+ * by arbitrary of them any number of times. Therefore, this class guarantees
+ * that choice history will be persisted only if it has changed.
+ */
+ private boolean mHistoricalRecordsChanged = true;
+
+ /**
+ * Hander for scheduling work on client tread.
+ */
+ private final Handler mHandler = new Handler();
+
+ /**
+ * Gets the data model backed by the contents of the provided file with historical data.
+ * Note that only one data model is backed by a given file, thus multiple calls with
+ * the same file name will return the same model instance. If no such instance is present
+ * it is created.
+ * <p>
+ * <strong>Note:</strong> To use the default historical data file clients should explicitly
+ * pass as file name {@link #DEFAULT_HISTORY_FILE_NAME}. If no persistence of the choice
+ * history is desired clients should pass <code>null</code> for the file name. In such
+ * case a new model is returned for each invocation.
+ * </p>
+ *
+ * <p>
+ * <strong>Always use difference historical data files for semantically different actions.
+ * For example, sharing is different from importing.</strong>
+ * </p>
+ *
+ * @param context Context for loading resources.
+ * @param historyFileName File name with choice history, <code>null</code>
+ * if the model should not be backed by a file. In this case the activities
+ * will be ordered only by data from the current session.
+ *
+ * @return The model.
+ */
+ public static ActivityChooserModel get(Context context, String historyFileName) {
+ if (historyFileName == null) {
+ return new ActivityChooserModel(context, historyFileName);
+ }
+ synchronized (sRegistryLock) {
+ ActivityChooserModel dataModel = sDataModelRegistry.get(historyFileName);
+ if (dataModel == null) {
+ dataModel = new ActivityChooserModel(context, historyFileName);
+ sDataModelRegistry.put(historyFileName, dataModel);
+ }
+ return dataModel;
+ }
+ }
+
+ /**
+ * Creates a new instance.
+ *
+ * @param context Context for loading resources.
+ * @param historyFileName The history XML file.
+ */
+ private ActivityChooserModel(Context context, String historyFileName) {
+ mContext = context.getApplicationContext();
+ if (!TextUtils.isEmpty(historyFileName)
+ && !historyFileName.endsWith(HISTORY_FILE_EXTENSION)) {
+ mHistoryFileName = historyFileName + HISTORY_FILE_EXTENSION;
+ } else {
+ mHistoryFileName = historyFileName;
+ }
+ mPackageMonitor.register(mContext, true);
+ }
+
+ /**
+ * Sets an intent for which to choose a activity.
+ * <p>
+ * <strong>Note:</strong> Clients must set only semantically similar
+ * intents for each data model.
+ * <p>
+ *
+ * @param intent The intent.
+ */
+ public void setIntent(Intent intent) {
+ synchronized (mInstanceLock) {
+ if (mIntent == intent) {
+ return;
+ }
+ mIntent = intent;
+ loadActivitiesLocked();
+ }
+ }
+
+ /**
+ * Gets the intent for which a activity is being chosen.
+ *
+ * @return The intent.
+ */
+ public Intent getIntent() {
+ synchronized (mInstanceLock) {
+ return mIntent;
+ }
+ }
+
+ /**
+ * Gets the number of activities that can handle the intent.
+ *
+ * @return The activity count.
+ *
+ * @see #setIntent(Intent)
+ */
+ public int getActivityCount() {
+ synchronized (mInstanceLock) {
+ return mActivitys.size();
+ }
+ }
+
+ /**
+ * Gets an activity at a given index.
+ *
+ * @return The activity.
+ *
+ * @see Activity
+ * @see #setIntent(Intent)
+ */
+ public ResolveInfo getActivity(int index) {
+ synchronized (mInstanceLock) {
+ return mActivitys.get(index).resolveInfo;
+ }
+ }
+
+ /**
+ * Gets the index of a the given activity.
+ *
+ * @param activity The activity index.
+ *
+ * @return The index if found, -1 otherwise.
+ */
+ public int getActivityIndex(ResolveInfo activity) {
+ List<Activity> activities = mActivitys;
+ final int activityCount = activities.size();
+ for (int i = 0; i < activityCount; i++) {
+ Activity currentActivity = activities.get(i);
+ if (currentActivity.resolveInfo == activity) {
+ return i;
+ }
+ }
+ return INVALID_INDEX;
+ }
+
+ /**
+ * Chooses a activity to handle the current intent. This will result in
+ * adding a historical record for that action and construct intent with
+ * its component name set such that it can be immediately started by the
+ * client.
+ * <p>
+ * <strong>Note:</strong> By calling this method the client guarantees
+ * that the returned intent will be started. This intent is returned to
+ * the client solely to let additional customization before the start.
+ * </p>
+ *
+ * @return Whether adding succeeded.
+ *
+ * @see HistoricalRecord
+ */
+ public Intent chooseActivity(int index) {
+ Activity chosenActivity = mActivitys.get(index);
+ Activity defaultActivity = mActivitys.get(0);
+
+ ComponentName chosenName = new ComponentName(
+ chosenActivity.resolveInfo.activityInfo.packageName,
+ chosenActivity.resolveInfo.activityInfo.name);
+ HistoricalRecord historicalRecord = new HistoricalRecord(chosenName,
+ System.currentTimeMillis(), DEFAULT_HISTORICAL_RECORD_WEIGHT);
+ addHisoricalRecord(historicalRecord);
+
+ Intent choiceIntent = new Intent(mIntent);
+ choiceIntent.setComponent(chosenName);
+
+ return choiceIntent;
+ }
+
+ /**
+ * Gets the default activity, The default activity is defined as the one
+ * with highest rank i.e. the first one in the list of activities that can
+ * handle the intent.
+ *
+ * @return The default activity, <code>null</code> id not activities.
+ *
+ * @see #getActivity(int)
+ */
+ public ResolveInfo getDefaultActivity() {
+ synchronized (mInstanceLock) {
+ if (!mActivitys.isEmpty()) {
+ return mActivitys.get(0).resolveInfo;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * Sets the default activity. The default activity is set by adding a
+ * historical record with weight high enough that this activity will
+ * become the highest ranked. Such a strategy guarantees that the default
+ * will eventually change if not used. Also the weight of the record for
+ * setting a default is inflated with a constant amount to guarantee that
+ * it will stay as default for awhile.
+ *
+ * @param index The index of the activity to set as default.
+ */
+ public void setDefaultActivity(int index) {
+ Activity newDefaultActivity = mActivitys.get(index);
+ Activity oldDefaultActivity = mActivitys.get(0);
+
+ final float weight;
+ if (oldDefaultActivity != null) {
+ // Add a record with weight enough to boost the chosen at the top.
+ weight = oldDefaultActivity.weight - newDefaultActivity.weight
+ + DEFAULT_ACTIVITY_INFLATION;
+ } else {
+ weight = DEFAULT_HISTORICAL_RECORD_WEIGHT;
+ }
+
+ ComponentName defaultName = new ComponentName(
+ newDefaultActivity.resolveInfo.activityInfo.packageName,
+ newDefaultActivity.resolveInfo.activityInfo.name);
+ HistoricalRecord historicalRecord = new HistoricalRecord(defaultName,
+ System.currentTimeMillis(), weight);
+ addHisoricalRecord(historicalRecord);
+ }
+
+ /**
+ * Reads the history data from the backing file if the latter
+ * was provided. Calling this method more than once before a call
+ * to {@link #persistHistoricalData()} has been made has no effect.
+ * <p>
+ * <strong>Note:</strong> Historical data is read asynchronously and
+ * as soon as the reading is completed any registered
+ * {@link DataSetObserver}s will be notified. Also no historical
+ * data is read until this method is invoked.
+ * <p>
+ */
+ public void readHistoricalData() {
+ synchronized (mInstanceLock) {
+ if (!mCanReadHistoricalData || !mHistoricalRecordsChanged) {
+ return;
+ }
+ mCanReadHistoricalData = false;
+ mReadShareHistoryCalled = true;
+ if (!TextUtils.isEmpty(mHistoryFileName)) {
+ AsyncTask.SERIAL_EXECUTOR.execute(new HistoryLoader());
+ }
+ }
+ }
+
+ /**
+ * Persists the history data to the backing file if the latter
+ * was provided. Calling this method before a call to {@link #readHistoricalData()}
+ * throws an exception. Calling this method more than one without choosing an
+ * activity has not effect.
+ *
+ * @throws IllegalStateException If this method is called before a call to
+ * {@link #readHistoricalData()}.
+ */
+ public void persistHistoricalData() {
+ synchronized (mInstanceLock) {
+ if (!mReadShareHistoryCalled) {
+ throw new IllegalStateException("No preceding call to #readHistoricalData");
+ }
+ if (!mHistoricalRecordsChanged) {
+ return;
+ }
+ mHistoricalRecordsChanged = false;
+ mCanReadHistoricalData = true;
+ if (!TextUtils.isEmpty(mHistoryFileName)) {
+ AsyncTask.SERIAL_EXECUTOR.execute(new HistoryPersister());
+ }
+ }
+ }
+
+ /**
+ * Sets the sorter for ordering activities based on historical data and an intent.
+ *
+ * @param activitySorter The sorter.
+ *
+ * @see ActivitySorter
+ */
+ public void setActivitySorter(ActivitySorter activitySorter) {
+ synchronized (mInstanceLock) {
+ if (mActivitySorter == activitySorter) {
+ return;
+ }
+ mActivitySorter = activitySorter;
+ sortActivities();
+ }
+ }
+
+ /**
+ * Sorts the activities based on history and an intent. If
+ * a sorter is not specified this a default implementation is used.
+ *
+ * @see #setActivitySorter(ActivitySorter)
+ */
+ private void sortActivities() {
+ synchronized (mInstanceLock) {
+ if (mActivitySorter != null && !mActivitys.isEmpty()) {
+ mActivitySorter.sort(mIntent, mActivitys,
+ Collections.unmodifiableList(mHistoricalRecords));
+ notifyChanged();
+ }
+ }
+ }
+
+ /**
+ * Sets the maximal size of the historical data. Defaults to
+ * {@link #DEFAULT_HISTORY_MAX_LENGTH}
+ * <p>
+ * <strong>Note:</strong> Setting this property will immediately
+ * enforce the specified max history size by dropping enough old
+ * historical records to enforce the desired size. Thus, any
+ * records that exceed the history size will be discarded and
+ * irreversibly lost.
+ * </p>
+ *
+ * @param historyMaxSize The max history size.
+ */
+ public void setHistoryMaxSize(int historyMaxSize) {
+ synchronized (mInstanceLock) {
+ if (mHistoryMaxSize == historyMaxSize) {
+ return;
+ }
+ mHistoryMaxSize = historyMaxSize;
+ pruneExcessiveHistoricalRecordsLocked();
+ sortActivities();
+ }
+ }
+
+ /**
+ * Gets the history max size.
+ *
+ * @return The history max size.
+ */
+ public int getHistoryMaxSize() {
+ synchronized (mInstanceLock) {
+ return mHistoryMaxSize;
+ }
+ }
+
+ @Override
+ protected void finalize() throws Throwable {
+ super.finalize();
+ mPackageMonitor.unregister();
+ }
+
+ /**
+ * Adds a historical record.
+ *
+ * @param historicalRecord The record to add.
+ * @return True if the record was added.
+ */
+ private boolean addHisoricalRecord(HistoricalRecord historicalRecord) {
+ synchronized (mInstanceLock) {
+ final boolean added = mHistoricalRecords.add(historicalRecord);
+ if (added) {
+ mHistoricalRecordsChanged = true;
+ pruneExcessiveHistoricalRecordsLocked();
+ sortActivities();
+ }
+ return added;
+ }
+ }
+
+ /**
+ * Prunes older excessive records to guarantee {@link #mHistoryMaxSize}.
+ */
+ private void pruneExcessiveHistoricalRecordsLocked() {
+ List<HistoricalRecord> choiceRecords = mHistoricalRecords;
+ final int pruneCount = choiceRecords.size() - mHistoryMaxSize;
+ if (pruneCount <= 0) {
+ return;
+ }
+ mHistoricalRecordsChanged = true;
+ for (int i = 0; i < pruneCount; i++) {
+ HistoricalRecord prunedRecord = choiceRecords.remove(0);
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Pruned: " + prunedRecord);
+ }
+ }
+ }
+
+ /**
+ * Loads the activities.
+ */
+ private void loadActivitiesLocked() {
+ mActivitys.clear();
+ if (mIntent != null) {
+ List<ResolveInfo> resolveInfos =
+ mContext.getPackageManager().queryIntentActivities(mIntent, 0);
+ final int resolveInfoCount = resolveInfos.size();
+ for (int i = 0; i < resolveInfoCount; i++) {
+ ResolveInfo resolveInfo = resolveInfos.get(i);
+ mActivitys.add(new Activity(resolveInfo));
+ }
+ sortActivities();
+ } else {
+ notifyChanged();
+ }
+ }
+
+ /**
+ * Prunes historical records for a package that goes away.
+ *
+ * @param packageName The name of the package that goes away.
+ */
+ private void pruneHistoricalRecordsForPackageLocked(String packageName) {
+ boolean recordsRemoved = false;
+
+ List<HistoricalRecord> historicalRecords = mHistoricalRecords;
+ for (int i = 0; i < historicalRecords.size(); i++) {
+ HistoricalRecord historicalRecord = historicalRecords.get(i);
+ String recordPackageName = historicalRecord.activity.getPackageName();
+ if (recordPackageName.equals(packageName)) {
+ historicalRecords.remove(historicalRecord);
+ recordsRemoved = true;
+ }
+ }
+
+ if (recordsRemoved) {
+ mHistoricalRecordsChanged = true;
+ sortActivities();
+ }
+ }
+
+ /**
+ * Represents a record in the history.
+ */
+ public final static class HistoricalRecord {
+
+ /**
+ * The activity name.
+ */
+ public final ComponentName activity;
+
+ /**
+ * The choice time.
+ */
+ public final long time;
+
+ /**
+ * The record weight.
+ */
+ public final float weight;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param activityName The activity component name flattened to string.
+ * @param time The time the activity was chosen.
+ * @param weight The weight of the record.
+ */
+ public HistoricalRecord(String activityName, long time, float weight) {
+ this(ComponentName.unflattenFromString(activityName), time, weight);
+ }
+
+ /**
+ * Creates a new instance.
+ *
+ * @param activityName The activity name.
+ * @param time The time the activity was chosen.
+ * @param weight The weight of the record.
+ */
+ public HistoricalRecord(ComponentName activityName, long time, float weight) {
+ this.activity = activityName;
+ this.time = time;
+ this.weight = weight;
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + ((activity == null) ? 0 : activity.hashCode());
+ result = prime * result + (int) (time ^ (time >>> 32));
+ result = prime * result + Float.floatToIntBits(weight);
+ return result;
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null) {
+ return false;
+ }
+ if (getClass() != obj.getClass()) {
+ return false;
+ }
+ HistoricalRecord other = (HistoricalRecord) obj;
+ if (activity == null) {
+ if (other.activity != null) {
+ return false;
+ }
+ } else if (!activity.equals(other.activity)) {
+ return false;
+ }
+ if (time != other.time) {
+ return false;
+ }
+ if (Float.floatToIntBits(weight) != Float.floatToIntBits(other.weight)) {
+ return false;
+ }
+ return true;
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder builder = new StringBuilder();
+ builder.append("[");
+ builder.append("; activity:").append(activity);
+ builder.append("; time:").append(time);
+ builder.append("; weight:").append(new BigDecimal(weight));
+ builder.append("]");
+ return builder.toString();
+ }
+ }
+
+ /**
+ * Represents an activity.
+ */
+ public final class Activity implements Comparable<Activity> {
+
+ /**
+ * The {@link ResolveInfo} of the activity.
+ */
+ public final ResolveInfo resolveInfo;
+
+ /**
+ * Weight of the activity. Useful for sorting.
+ */
+ public float weight;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param resolveInfo activity {@link ResolveInfo}.
+ */
+ public Activity(ResolveInfo resolveInfo) {
+ this.resolveInfo = resolveInfo;
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 + Float.floatToIntBits(weight);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null) {
+ return false;
+ }
+ if (getClass() != obj.getClass()) {
+ return false;
+ }
+ Activity other = (Activity) obj;
+ if (Float.floatToIntBits(weight) != Float.floatToIntBits(other.weight)) {
+ return false;
+ }
+ return true;
+ }
+
+ public int compareTo(Activity another) {
+ return Float.floatToIntBits(another.weight) - Float.floatToIntBits(weight);
+ }
+
+ @Override
+ public String toString() {
+ StringBuilder builder = new StringBuilder();
+ builder.append("[");
+ builder.append("resolveInfo:").append(resolveInfo.toString());
+ builder.append("; weight:").append(new BigDecimal(weight));
+ builder.append("]");
+ return builder.toString();
+ }
+ }
+
+ /**
+ * Default activity sorter implementation.
+ */
+ private final class DefaultSorter implements ActivitySorter {
+ private static final float WEIGHT_DECAY_COEFFICIENT = 0.95f;
+
+ private final Map<String, Activity> mPackageNameToActivityMap =
+ new HashMap<String, Activity>();
+
+ public void sort(Intent intent, List<Activity> activities,
+ List<HistoricalRecord> historicalRecords) {
+ Map<String, Activity> packageNameToActivityMap =
+ mPackageNameToActivityMap;
+ packageNameToActivityMap.clear();
+
+ final int activityCount = activities.size();
+ for (int i = 0; i < activityCount; i++) {
+ Activity activity = activities.get(i);
+ activity.weight = 0.0f;
+ String packageName = activity.resolveInfo.activityInfo.packageName;
+ packageNameToActivityMap.put(packageName, activity);
+ }
+
+ final int lastShareIndex = historicalRecords.size() - 1;
+ float nextRecordWeight = 1;
+ for (int i = lastShareIndex; i >= 0; i--) {
+ HistoricalRecord historicalRecord = historicalRecords.get(i);
+ String packageName = historicalRecord.activity.getPackageName();
+ Activity activity = packageNameToActivityMap.get(packageName);
+ activity.weight += historicalRecord.weight * nextRecordWeight;
+ nextRecordWeight = nextRecordWeight * WEIGHT_DECAY_COEFFICIENT;
+ }
+
+ Collections.sort(activities);
+
+ if (DEBUG) {
+ for (int i = 0; i < activityCount; i++) {
+ Log.i(LOG_TAG, "Sorted: " + activities.get(i));
+ }
+ }
+ }
+ }
+
+ /**
+ * Command for reading the historical records from a file off the UI thread.
+ */
+ private final class HistoryLoader implements Runnable {
+
+ public void run() {
+ FileInputStream fis = null;
+ try {
+ fis = mContext.openFileInput(mHistoryFileName);
+ } catch (FileNotFoundException fnfe) {
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Could not open historical records file: " + mHistoryFileName);
+ }
+ return;
+ }
+ try {
+ XmlPullParser parser = Xml.newPullParser();
+ parser.setInput(fis, null);
+
+ int type = XmlPullParser.START_DOCUMENT;
+ while (type != XmlPullParser.END_DOCUMENT && type != XmlPullParser.START_TAG) {
+ type = parser.next();
+ }
+
+ if (!TAG_HISTORICAL_RECORDS.equals(parser.getName())) {
+ throw new XmlPullParserException("Share records file does not start with "
+ + TAG_HISTORICAL_RECORDS + " tag.");
+ }
+
+ List<HistoricalRecord> readRecords = new ArrayList<HistoricalRecord>();
+
+ while (true) {
+ type = parser.next();
+ if (type == XmlPullParser.END_DOCUMENT) {
+ break;
+ }
+ if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) {
+ continue;
+ }
+ String nodeName = parser.getName();
+ if (!TAG_HISTORICAL_RECORD.equals(nodeName)) {
+ throw new XmlPullParserException("Share records file not well-formed.");
+ }
+
+ String activity = parser.getAttributeValue(null, ATTRIBUTE_ACTIVITY);
+ final long time =
+ Long.parseLong(parser.getAttributeValue(null, ATTRIBUTE_TIME));
+ final float weight =
+ Float.parseFloat(parser.getAttributeValue(null, ATTRIBUTE_WEIGHT));
+
+ HistoricalRecord readRecord = new HistoricalRecord(activity, time,
+ weight);
+ readRecords.add(readRecord);
+
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Read " + readRecord.toString());
+ }
+ }
+
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Read " + readRecords.size() + " historical records.");
+ }
+
+ synchronized (mInstanceLock) {
+ Set<HistoricalRecord> uniqueShareRecords =
+ new LinkedHashSet<HistoricalRecord>(readRecords);
+
+ // Make sure no duplicates. Example: Read a file with
+ // one record, add one record, persist the two records,
+ // add a record, read the persisted records - the
+ // read two records should not be added again.
+ List<HistoricalRecord> historicalRecords = mHistoricalRecords;
+ final int historicalRecordsCount = historicalRecords.size();
+ for (int i = historicalRecordsCount - 1; i >= 0; i--) {
+ HistoricalRecord historicalRecord = historicalRecords.get(i);
+ uniqueShareRecords.add(historicalRecord);
+ }
+
+ if (historicalRecords.size() == uniqueShareRecords.size()) {
+ return;
+ }
+
+ // Make sure the oldest records go to the end.
+ historicalRecords.clear();
+ historicalRecords.addAll(uniqueShareRecords);
+
+ mHistoricalRecordsChanged = true;
+
+ // Do this on the client thread since the client may be on the UI
+ // thread, wait for data changes which happen during sorting, and
+ // perform UI modification based on the data change.
+ mHandler.post(new Runnable() {
+ public void run() {
+ pruneExcessiveHistoricalRecordsLocked();
+ sortActivities();
+ }
+ });
+ }
+ } catch (XmlPullParserException xppe) {
+ Log.e(LOG_TAG, "Error reading historical recrod file: " + mHistoryFileName, xppe);
+ } catch (IOException ioe) {
+ Log.e(LOG_TAG, "Error reading historical recrod file: " + mHistoryFileName, ioe);
+ } finally {
+ if (fis != null) {
+ try {
+ fis.close();
+ } catch (IOException ioe) {
+ /* ignore */
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * Command for persisting the historical records to a file off the UI thread.
+ */
+ private final class HistoryPersister implements Runnable {
+
+ public void run() {
+ FileOutputStream fos = null;
+ List<HistoricalRecord> records = null;
+
+ synchronized (mInstanceLock) {
+ records = new ArrayList<HistoricalRecord>(mHistoricalRecords);
+ }
+
+ try {
+ fos = mContext.openFileOutput(mHistoryFileName, Context.MODE_PRIVATE);
+ } catch (FileNotFoundException fnfe) {
+ Log.e(LOG_TAG, "Error writing historical recrod file: " + mHistoryFileName, fnfe);
+ return;
+ }
+
+ XmlSerializer serializer = Xml.newSerializer();
+
+ try {
+ serializer.setOutput(fos, null);
+ serializer.startDocument("UTF-8", true);
+ serializer.startTag(null, TAG_HISTORICAL_RECORDS);
+
+ final int recordCount = records.size();
+ for (int i = 0; i < recordCount; i++) {
+ HistoricalRecord record = records.remove(0);
+ serializer.startTag(null, TAG_HISTORICAL_RECORD);
+ serializer.attribute(null, ATTRIBUTE_ACTIVITY, record.activity.flattenToString());
+ serializer.attribute(null, ATTRIBUTE_TIME, String.valueOf(record.time));
+ serializer.attribute(null, ATTRIBUTE_WEIGHT, String.valueOf(record.weight));
+ serializer.endTag(null, TAG_HISTORICAL_RECORD);
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Wrote " + record.toString());
+ }
+ }
+
+ serializer.endTag(null, TAG_HISTORICAL_RECORDS);
+ serializer.endDocument();
+
+ if (DEBUG) {
+ Log.i(LOG_TAG, "Wrote " + recordCount + " historical records.");
+ }
+ } catch (IllegalArgumentException iae) {
+ Log.e(LOG_TAG, "Error writing historical recrod file: " + mHistoryFileName, iae);
+ } catch (IllegalStateException ise) {
+ Log.e(LOG_TAG, "Error writing historical recrod file: " + mHistoryFileName, ise);
+ } catch (IOException ioe) {
+ Log.e(LOG_TAG, "Error writing historical recrod file: " + mHistoryFileName, ioe);
+ } finally {
+ if (fos != null) {
+ try {
+ fos.close();
+ } catch (IOException e) {
+ /* ignore */
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * Keeps in sync the historical records and activities with the installed applications.
+ */
+ private final class DataModelPackageMonitor extends PackageMonitor {
+
+ @Override
+ public void onPackageAdded(String packageName, int uid) {
+ synchronized (mInstanceLock) {
+ loadActivitiesLocked();
+ }
+ }
+
+ @Override
+ public void onPackageAppeared(String packageName, int reason) {
+ synchronized (mInstanceLock) {
+ loadActivitiesLocked();
+ }
+ }
+
+ @Override
+ public void onPackageRemoved(String packageName, int uid) {
+ synchronized (mInstanceLock) {
+ pruneHistoricalRecordsForPackageLocked(packageName);
+ loadActivitiesLocked();
+ }
+ }
+
+ @Override
+ public void onPackageDisappeared(String packageName, int reason) {
+ synchronized (mInstanceLock) {
+ pruneHistoricalRecordsForPackageLocked(packageName);
+ loadActivitiesLocked();
+ }
+ }
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.widget;
+
+import android.app.AlertDialog;
+import android.app.AlertDialog.Builder;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.content.res.TypedArray;
+import android.database.DataSetObserver;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.os.Debug;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ActivityChooserModel.ActivityChooserModelClient;
+
+import com.android.internal.R;
+
+/**
+ * This class is a view for choosing an activity for handling a given {@link Intent}.
+ * <p>
+ * The view is composed of two adjacent buttons:
+ * <ul>
+ * <li>
+ * The left button is an immediate action and allows one click activity choosing.
+ * Tapping this button immediately executes the intent without requiring any further
+ * user input. Long press on this button shows a popup for changing the default
+ * activity.
+ * </li>
+ * <li>
+ * The right button is an overflow action and provides an optimized menu
+ * of additional activities. Tapping this button shows a popup anchored to this
+ * view, listing the most frequently used activities. This list is initially
+ * limited to a small number of items in frequency used order. The last item,
+ * "Show all..." serves as an affordance to display all available activities.
+ * </li>
+ * </ul>
+ * </p>
+ * </p>
+ * This view is backed by a {@link ActivityChooserModel}. Calling {@link #showPopup()}
+ * while this view is attached to the view hierarchy will show a popup with
+ * activities while if the view is not attached it will show a dialog.
+ * </p>
+ *
+ * @hide
+ */
+public class ActivityChooserView extends ViewGroup implements ActivityChooserModelClient {
+
+ /**
+ * An adapter for displaying the activities in an {@link AdapterView}.
+ */
+ private final ActivityChooserViewAdapter mAdapter;
+
+ /**
+ * Implementation of various interfaces to avoid publishing them in the APIs.
+ */
+ private final Callbacks mCallbacks;
+
+ /**
+ * The content of this view.
+ */
+ private final LinearLayout mActivityChooserContent;
+
+ /**
+ * The expand activities action button;
+ */
+ private final ImageButton mExpandActivityOverflowButton;
+
+ /**
+ * The default activities action button;
+ */
+ private final ImageButton mDefaultActionButton;
+
+ /**
+ * The header for handlers list.
+ */
+ private final View mListHeaderView;
+
+ /**
+ * The footer for handlers list.
+ */
+ private final View mListFooterView;
+
+ /**
+ * The title of the header view.
+ */
+ private TextView mListHeaderViewTitle;
+
+ /**
+ * The title for expanding the activities list.
+ */
+ private final String mListHeaderViewTitleSelectDefault;
+
+ /**
+ * The title if no activity exist.
+ */
+ private final String mListHeaderViewTitleNoActivities;
+
+ /**
+ * Popup window for showing the activity overflow list.
+ */
+ private ListPopupWindow mListPopupWindow;
+
+ /**
+ * Alert dialog for showing the activity overflow list.
+ */
+ private AlertDialog mAlertDialog;
+
+ /**
+ * Listener for the dismissal of the popup/alert.
+ */
+ private PopupWindow.OnDismissListener mOnDismissListener;
+
+ /**
+ * Flag whether a default activity currently being selected.
+ */
+ private boolean mIsSelectingDefaultActivity;
+
+ /**
+ * The count of activities in the popup.
+ */
+ private int mInitialActivityCount = ActivityChooserViewAdapter.MAX_ACTIVITY_COUNT_DEFAULT;
+
+ /**
+ * Flag whether this view is attached to a window.
+ */
+ private boolean mIsAttachedToWindow;
+
+ /**
+ * Flag whether this view is showing an alert dialog.
+ */
+ private boolean mIsShowingAlertDialog;
+
+ /**
+ * Flag whether this view is showing a popup window.
+ */
+ private boolean mIsShowingPopuWindow;
+
+ /**
+ * Create a new instance.
+ *
+ * @param context The application environment.
+ */
+ public ActivityChooserView(Context context) {
+ this(context, null);
+ }
+
+ /**
+ * Create a new instance.
+ *
+ * @param context The application environment.
+ * @param attrs A collection of attributes.
+ */
+ public ActivityChooserView(Context context, AttributeSet attrs) {
+ this(context, attrs, R.attr.actionButtonStyle);
+ }
+
+ /**
+ * Create a new instance.
+ *
+ * @param context The application environment.
+ * @param attrs A collection of attributes.
+ * @param defStyle The default style to apply to this view.
+ */
+ public ActivityChooserView(Context context, AttributeSet attrs, int defStyle) {
+ super(context, attrs, defStyle);
+
+ TypedArray attributesArray = context.obtainStyledAttributes(attrs,
+ R.styleable.ActivityChooserView, defStyle, 0);
+
+ mInitialActivityCount = attributesArray.getInt(
+ R.styleable.ActivityChooserView_initialActivityCount,
+ ActivityChooserViewAdapter.MAX_ACTIVITY_COUNT_DEFAULT);
+
+ Drawable expandActivityOverflowButtonDrawable = attributesArray.getDrawable(
+ R.styleable.ActivityChooserView_expandActivityOverflowButtonDrawable);
+
+ LayoutInflater inflater = (LayoutInflater) context.getSystemService(
+ Context.LAYOUT_INFLATER_SERVICE);
+ inflater.inflate(R.layout.activity_chooser_view, this, true);
+
+ mCallbacks = new Callbacks();
+
+ mActivityChooserContent = (LinearLayout) findViewById(R.id.activity_chooser_view_content);
+
+ mDefaultActionButton = (ImageButton) findViewById(R.id.default_activity_button);
+ mDefaultActionButton.setOnClickListener(mCallbacks);
+ mDefaultActionButton.setOnLongClickListener(mCallbacks);
+
+ mExpandActivityOverflowButton = (ImageButton) findViewById(R.id.expand_activities_button);
+ mExpandActivityOverflowButton.setOnClickListener(mCallbacks);
+ mExpandActivityOverflowButton.setBackgroundDrawable(expandActivityOverflowButtonDrawable);
+
+ mListHeaderView = inflater.inflate(R.layout.activity_chooser_list_header, null);
+ mListFooterView = inflater.inflate(R.layout.activity_chooser_list_footer, null);
+
+ mListHeaderViewTitle = (TextView) mListHeaderView.findViewById(R.id.title);
+ mListHeaderViewTitleSelectDefault = context.getString(
+ R.string.activity_chooser_view_select_default);
+ mListHeaderViewTitleNoActivities = context.getString(
+ R.string.activity_chooser_view_no_activities);
+
+ mAdapter = new ActivityChooserViewAdapter();
+ mAdapter.registerDataSetObserver(new DataSetObserver() {
+ @Override
+ public void onChanged() {
+ super.onChanged();
+ updateButtons();
+ }
+ });
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public void setActivityChooserModel(ActivityChooserModel dataModel) {
+ mAdapter.setDataModel(dataModel);
+ if (isShowingPopup()) {
+ dismissPopup();
+ showPopup();
+ }
+ }
+
+ /**
+ * Sets the background for the button that expands the activity
+ * overflow list.
+ *
+ * <strong>Note:</strong> Clients would like to set this drawable
+ * as a clue about the action the chosen activity will perform. For
+ * example, if share activity is to be chosen the drawable should
+ * give a clue that sharing is to be performed.
+ *
+ * @param drawable The drawable.
+ */
+ public void setExpandActivityOverflowButtonDrawable(Drawable drawable) {
+ mExpandActivityOverflowButton.setBackgroundDrawable(drawable);
+ }
+
+ /**
+ * Shows the popup window with activities.
+ *
+ * @return True if the popup was shown, false if already showing.
+ */
+ public boolean showPopup() {
+ if (isShowingPopup()) {
+ return false;
+ }
+ mIsSelectingDefaultActivity = false;
+ showPopupUnchecked(mInitialActivityCount);
+ return true;
+ }
+
+ /**
+ * Shows the popup no matter if it was already showing.
+ *
+ * @param maxActivityCount The max number of activities to display.
+ */
+ private void showPopupUnchecked(int maxActivityCount) {
+ mAdapter.setMaxActivityCount(maxActivityCount);
+ if (mIsSelectingDefaultActivity) {
+ if (mAdapter.getActivityCount() > 0) {
+ mListHeaderViewTitle.setText(mListHeaderViewTitleSelectDefault);
+ } else {
+ mListHeaderViewTitle.setText(mListHeaderViewTitleNoActivities);
+ }
+ mAdapter.setHeaderView(mListHeaderView);
+ } else {
+ mAdapter.setHeaderView(null);
+ }
+
+ if (mAdapter.getActivityCount() > maxActivityCount + 1) {
+ mAdapter.setFooterView(mListFooterView);
+ } else {
+ mAdapter.setFooterView(null);
+ }
+
+ if (!mIsAttachedToWindow || mIsShowingAlertDialog) {
+ AlertDialog alertDialog = getAlertDilalog();
+ if (!alertDialog.isShowing()) {
+ alertDialog.setCustomTitle(this);
+ alertDialog.show();
+ mIsShowingAlertDialog = true;
+ }
+ } else {
+ ListPopupWindow popupWindow = getListPopupWindow();
+ if (!popupWindow.isShowing()) {
+ popupWindow.setContentWidth(mAdapter.measureContentWidth());
+ popupWindow.show();
+ mIsShowingPopuWindow = true;
+ }
+ }
+ }
+
+ /**
+ * Dismisses the popup window with activities.
+ *
+ * @return True if dismissed, false if already dismissed.
+ */
+ public boolean dismissPopup() {
+ if (!isShowingPopup()) {
+ return false;
+ }
+ if (mIsShowingAlertDialog) {
+ getAlertDilalog().dismiss();
+ } else if (mIsShowingPopuWindow) {
+ getListPopupWindow().dismiss();
+ }
+ return true;
+ }
+
+ /**
+ * Gets whether the popup window with activities is shown.
+ *
+ * @return True if the popup is shown.
+ */
+ public boolean isShowingPopup() {
+ if (mIsShowingAlertDialog) {
+ return getAlertDilalog().isShowing();
+ } else if (mIsShowingPopuWindow) {
+ return getListPopupWindow().isShowing();
+ }
+ return false;
+ }
+
+ @Override
+ protected void onAttachedToWindow() {
+ super.onAttachedToWindow();
+ ActivityChooserModel dataModel = mAdapter.getDataModel();
+ if (dataModel != null) {
+ dataModel.readHistoricalData();
+ }
+ mIsAttachedToWindow = true;
+ }
+
+ @Override
+ protected void onDetachedFromWindow() {
+ super.onDetachedFromWindow();
+ ActivityChooserModel dataModel = mAdapter.getDataModel();
+ if (dataModel != null) {
+ dataModel.persistHistoricalData();
+ }
+ mIsAttachedToWindow = false;
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ mActivityChooserContent.measure(widthMeasureSpec, heightMeasureSpec);
+ setMeasuredDimension(mActivityChooserContent.getMeasuredWidth(),
+ mActivityChooserContent.getMeasuredHeight());
+ }
+
+ @Override
+ protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
+ mActivityChooserContent.layout(left, top, right, bottom);
+ if (mIsShowingPopuWindow) {
+ if (isShown()) {
+ showPopupUnchecked(mAdapter.getMaxActivityCount());
+ } else {
+ dismissPopup();
+ }
+ }
+ }
+
+ @Override
+ protected void onDraw(Canvas canvas) {
+ mActivityChooserContent.onDraw(canvas);
+ }
+
+ public ActivityChooserModel getDataModel() {
+ return mAdapter.getDataModel();
+ }
+
+ /**
+ * Sets a listener to receive a callback when the popup is dismissed.
+ *
+ * @param listener The listener to be notified.
+ */
+ public void setOnDismissListener(PopupWindow.OnDismissListener listener) {
+ mOnDismissListener = listener;
+ }
+
+ /**
+ * Sets the initial count of items shown in the activities popup
+ * i.e. the items before the popup is expanded. This is an upper
+ * bound since it is not guaranteed that such number of intent
+ * handlers exist.
+ *
+ * @param itemCount The initial popup item count.
+ */
+ public void setInitialActivityCount(int itemCount) {
+ mInitialActivityCount = itemCount;
+ }
+
+ /**
+ * Gets the list popup window which is lazily initialized.
+ *
+ * @return The popup.
+ */
+ private ListPopupWindow getListPopupWindow() {
+ if (mListPopupWindow == null) {
+ mListPopupWindow = new ListPopupWindow(getContext());
+ mListPopupWindow.setAdapter(mAdapter);
+ mListPopupWindow.setAnchorView(ActivityChooserView.this);
+ mListPopupWindow.setModal(true);
+ mListPopupWindow.setOnItemClickListener(mCallbacks);
+ mListPopupWindow.setOnDismissListener(mCallbacks);
+ }
+ return mListPopupWindow;
+ }
+
+ /**
+ * Gets the alert dialog which is lazily initialized.
+ *
+ * @return The popup.
+ */
+ private AlertDialog getAlertDilalog() {
+ if (mAlertDialog == null) {
+ Builder builder = new Builder(getContext());
+ builder.setAdapter(mAdapter, null);
+ mAlertDialog = builder.create();
+ mAlertDialog.getListView().setOnItemClickListener(mCallbacks);
+ mAlertDialog.setOnDismissListener(mCallbacks);
+ }
+ return mAlertDialog;
+ }
+
+ /**
+ * Updates the buttons state.
+ */
+ private void updateButtons() {
+ final int activityCount = mAdapter.getActivityCount();
+ if (activityCount > 0) {
+ mDefaultActionButton.setVisibility(VISIBLE);
+ if (mAdapter.getCount() > 0) {
+ mExpandActivityOverflowButton.setEnabled(true);
+ } else {
+ mExpandActivityOverflowButton.setEnabled(false);
+ }
+ ResolveInfo activity = mAdapter.getDefaultActivity();
+ PackageManager packageManager = mContext.getPackageManager();
+ mDefaultActionButton.setBackgroundDrawable(activity.loadIcon(packageManager));
+ } else {
+ mDefaultActionButton.setVisibility(View.INVISIBLE);
+ mExpandActivityOverflowButton.setEnabled(false);
+ }
+ }
+
+ /**
+ * Interface implementation to avoid publishing them in the APIs.
+ */
+ private class Callbacks implements AdapterView.OnItemClickListener,
+ View.OnClickListener, View.OnLongClickListener, PopupWindow.OnDismissListener,
+ DialogInterface.OnDismissListener {
+
+ // AdapterView#OnItemClickListener
+ public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+ ActivityChooserViewAdapter adapter = (ActivityChooserViewAdapter) parent.getAdapter();
+ final int itemViewType = adapter.getItemViewType(position);
+ switch (itemViewType) {
+ case ActivityChooserViewAdapter.ITEM_VIEW_TYPE_HEADER: {
+ /* do nothing */
+ } break;
+ case ActivityChooserViewAdapter.ITEM_VIEW_TYPE_FOOTER: {
+ showPopupUnchecked(ActivityChooserViewAdapter.MAX_ACTIVITY_COUNT_UNLIMITED);
+ } break;
+ case ActivityChooserViewAdapter.ITEM_VIEW_TYPE_ACTIVITY: {
+ dismissPopup();
+ if (mIsSelectingDefaultActivity) {
+ mAdapter.getDataModel().setDefaultActivity(position);
+ } else {
+ // The first item in the model is default action => adjust index
+ Intent launchIntent = mAdapter.getDataModel().chooseActivity(position + 1);
+ mContext.startActivity(launchIntent);
+ }
+ } break;
+ default:
+ throw new IllegalArgumentException();
+ }
+ }
+
+ // View.OnClickListener
+ public void onClick(View view) {
+ if (view == mDefaultActionButton) {
+ dismissPopup();
+ ResolveInfo defaultActivity = mAdapter.getDefaultActivity();
+ final int index = mAdapter.getDataModel().getActivityIndex(defaultActivity);
+ Intent launchIntent = mAdapter.getDataModel().chooseActivity(index);
+ mContext.startActivity(launchIntent);
+ } else if (view == mExpandActivityOverflowButton) {
+ mIsSelectingDefaultActivity = false;
+ showPopupUnchecked(mInitialActivityCount);
+ } else {
+ throw new IllegalArgumentException();
+ }
+ }
+
+ // OnLongClickListener#onLongClick
+ @Override
+ public boolean onLongClick(View view) {
+ if (view == mDefaultActionButton) {
+ if (mAdapter.getCount() > 0) {
+ mIsSelectingDefaultActivity = true;
+ showPopupUnchecked(mInitialActivityCount);
+ }
+ } else {
+ throw new IllegalArgumentException();
+ }
+ return true;
+ }
+
+ // PopUpWindow.OnDismissListener#onDismiss
+ public void onDismiss() {
+ mIsShowingPopuWindow = false;
+ notifyOnDismissListener();
+ }
+
+ // DialogInterface.OnDismissListener#onDismiss
+ @Override
+ public void onDismiss(DialogInterface dialog) {
+ mIsShowingAlertDialog = false;
+ AlertDialog alertDialog = (AlertDialog) dialog;
+ alertDialog.setCustomTitle(null);
+ notifyOnDismissListener();
+ }
+
+ private void notifyOnDismissListener() {
+ if (mOnDismissListener != null) {
+ mOnDismissListener.onDismiss();
+ }
+ }
+ }
+
+ /**
+ * Adapter for backing the list of activities shown in the popup.
+ */
+ private class ActivityChooserViewAdapter extends BaseAdapter {
+
+ public static final int MAX_ACTIVITY_COUNT_UNLIMITED = Integer.MAX_VALUE;
+
+ public static final int MAX_ACTIVITY_COUNT_DEFAULT = 4;
+
+ private static final int ITEM_VIEW_TYPE_HEADER = 0;
+
+ private static final int ITEM_VIEW_TYPE_ACTIVITY = 1;
+
+ private static final int ITEM_VIEW_TYPE_FOOTER = 2;
+
+ private static final int ITEM_VIEW_TYPE_COUNT = 3;
+
+ private final DataSetObserver mDataSetOberver = new DataSetObserver() {
+
+ @Override
+ public void onChanged() {
+ super.onChanged();
+ notifyDataSetChanged();
+ }
+ @Override
+ public void onInvalidated() {
+ super.onInvalidated();
+ notifyDataSetInvalidated();
+ }
+ };
+
+ private ActivityChooserModel mDataModel;
+
+ private int mMaxActivityCount = MAX_ACTIVITY_COUNT_DEFAULT;
+
+ private ResolveInfo mDefaultActivity;
+
+ private View mHeaderView;
+
+ private View mFooterView;
+
+ public void setDataModel(ActivityChooserModel dataModel) {
+ mDataModel = dataModel;
+ mDataModel.registerObserver(mDataSetOberver);
+ notifyDataSetChanged();
+ }
+
+ @Override
+ public void notifyDataSetChanged() {
+ if (mDataModel.getActivityCount() > 0) {
+ mDefaultActivity = mDataModel.getDefaultActivity();
+ } else {
+ mDefaultActivity = null;
+ }
+ super.notifyDataSetChanged();
+ }
+
+ @Override
+ public int getItemViewType(int position) {
+ if (mHeaderView != null && position == 0) {
+ return ITEM_VIEW_TYPE_HEADER;
+ } else if (mFooterView != null && position == getCount() - 1) {
+ return ITEM_VIEW_TYPE_FOOTER;
+ } else {
+ return ITEM_VIEW_TYPE_ACTIVITY;
+ }
+ }
+
+ @Override
+ public int getViewTypeCount() {
+ return ITEM_VIEW_TYPE_COUNT;
+ }
+
+ public int getCount() {
+ int count = 0;
+ int activityCount = mDataModel.getActivityCount();
+ if (activityCount > 0) {
+ activityCount--;
+ }
+ count = Math.min(activityCount, mMaxActivityCount);
+ if (mHeaderView != null) {
+ count++;
+ }
+ if (mFooterView != null) {
+ count++;
+ }
+ return count;
+ }
+
+ public Object getItem(int position) {
+ final int itemViewType = getItemViewType(position);
+ switch (itemViewType) {
+ case ITEM_VIEW_TYPE_HEADER:
+ return mHeaderView;
+ case ITEM_VIEW_TYPE_FOOTER:
+ return mFooterView;
+ case ITEM_VIEW_TYPE_ACTIVITY:
+ int targetIndex = (mHeaderView == null) ? position : position - 1;
+ if (mDefaultActivity != null) {
+ targetIndex++;
+ }
+ return mDataModel.getActivity(targetIndex);
+ default:
+ throw new IllegalArgumentException();
+ }
+ }
+
+ public long getItemId(int position) {
+ return position;
+ }
+
+ @Override
+ public boolean isEnabled(int position) {
+ final int itemViewType = getItemViewType(position);
+ switch (itemViewType) {
+ case ITEM_VIEW_TYPE_HEADER:
+ return false;
+ case ITEM_VIEW_TYPE_FOOTER:
+ case ITEM_VIEW_TYPE_ACTIVITY:
+ return true;
+ default:
+ throw new IllegalArgumentException();
+ }
+ }
+
+ public View getView(int position, View convertView, ViewGroup parent) {
+ final int itemViewType = getItemViewType(position);
+ switch (itemViewType) {
+ case ITEM_VIEW_TYPE_HEADER:
+ return mHeaderView;
+ case ITEM_VIEW_TYPE_FOOTER:
+ return mFooterView;
+ case ITEM_VIEW_TYPE_ACTIVITY:
+ if (convertView == null || convertView.getId() != R.id.list_item) {
+ convertView = LayoutInflater.from(getContext()).inflate(
+ R.layout.activity_chooser_view_list_item, parent, false);
+ }
+ PackageManager packageManager = mContext.getPackageManager();
+ // Set the icon
+ ImageView iconView = (ImageView) convertView.findViewById(R.id.icon);
+ ResolveInfo activity = (ResolveInfo) getItem(position);
+ iconView.setBackgroundDrawable(activity.loadIcon(packageManager));
+ // Set the title.
+ TextView titleView = (TextView) convertView.findViewById(R.id.title);
+ titleView.setText(activity.loadLabel(packageManager));
+ return convertView;
+ default:
+ throw new IllegalArgumentException();
+ }
+ }
+
+ public int measureContentWidth() {
+ // The user may have specified some of the target not to be show but we
+ // want to measure all of them since after expansion they should fit.
+ final int oldMaxActivityCount = mMaxActivityCount;
+ mMaxActivityCount = MAX_ACTIVITY_COUNT_UNLIMITED;
+
+ int contentWidth = 0;
+ View itemView = null;
+
+ final int widthMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+ final int heightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
+ final int count = getCount();
+
+ for (int i = 0; i < count; i++) {
+ itemView = getView(i, itemView, null);
+ itemView.measure(widthMeasureSpec, heightMeasureSpec);
+ contentWidth = Math.max(contentWidth, itemView.getMeasuredWidth());
+ }
+
+ mMaxActivityCount = oldMaxActivityCount;
+
+ return contentWidth;
+ }
+
+ public void setMaxActivityCount(int maxActivityCount) {
+ if (mMaxActivityCount != maxActivityCount) {
+ mMaxActivityCount = maxActivityCount;
+ notifyDataSetChanged();
+ }
+ }
+
+ public ResolveInfo getDefaultActivity() {
+ return mDefaultActivity;
+ }
+
+ public void setHeaderView(View headerView) {
+ if (mHeaderView != headerView) {
+ mHeaderView = headerView;
+ notifyDataSetChanged();
+ }
+ }
+
+ public void setFooterView(View footerView) {
+ if (mFooterView != footerView) {
+ mFooterView = footerView;
+ notifyDataSetChanged();
+ }
+ }
+
+ public int getActivityCount() {
+ return mDataModel.getActivityCount();
+ }
+
+ public int getMaxActivityCount() {
+ return mMaxActivityCount;
+ }
+
+ public ActivityChooserModel getDataModel() {
+ return mDataModel;
+ }
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.widget;
+
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.drawable.Drawable;
+import android.util.TypedValue;
+import android.view.ActionProvider;
+import android.view.MenuItem;
+import android.view.View;
+
+import com.android.internal.R;
+
+/**
+ * This is a provider for a share action. It is responsible for creating views
+ * that enable data sharing and also to perform a default action for showing
+ * a share dialog.
+ * <p>
+ * Here is how to use the action provider with custom backing file in a {@link MenuItem}:
+ * </p>
+ * <p>
+ * <pre>
+ * <code>
+ * // In Activity#onCreateOptionsMenu
+ * public boolean onCreateOptionsMenu(Menu menu) {
+ * // Get the menu item.
+ * MenuItem menuItem = menu.findItem(R.id.my_menu_item);
+ * // Get the provider and hold onto it to set/change the share intent.
+ * mShareActionProvider = (ShareActionProvider) menuItem.getActionProvider();
+ * // Set history different from the default before getting the action
+ * // view since a call to {@link MenuItem#getActionView() MenuItem.getActionView()} calls
+ * // {@link ActionProvider#onCreateActionView()} which uses the backing file name. Omit this
+ * // line if using the default share history file is desired.
+ * mShareActionProvider.setShareHistoryFileName("custom_share_history.xml");
+ * // Get the action view and hold onto it to set the share intent.
+ * mActionView = menuItem.getActionView();
+ * . . .
+ * }
+ *
+ * // Somewhere in the application.
+ * public void doShare(Intent shareIntent) {
+ * // When you want to share set the share intent.
+ * mShareActionProvider.setShareIntent(mActionView, shareIntent);
+ * }
+ * </pre>
+ * </code>
+ * </p>
+ * <p>
+ * <strong>Note:</strong> While the sample snippet demonstrates how to use this provider
+ * in the context of a menu item, the use of the provider is not limited to menu items.
+ * </p>
+ *
+ * @see ActionProvider
+ */
+public class ShareActionProvider extends ActionProvider {
+
+ /**
+ * The default name for storing share history.
+ */
+ public static final String DEFAULT_SHARE_HISTORY_FILE_NAME = "share_history.xml";
+
+ private final Context mContext;
+ private String mShareHistoryFileName = DEFAULT_SHARE_HISTORY_FILE_NAME;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param context Context for accessing resources.
+ */
+ public ShareActionProvider(Context context) {
+ super(context);
+ mContext = context;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public View onCreateActionView() {
+ ActivityChooserModel dataModel = ActivityChooserModel.get(mContext, mShareHistoryFileName);
+ ActivityChooserView activityChooserView = new ActivityChooserView(mContext);
+ activityChooserView.setActivityChooserModel(dataModel);
+ TypedValue outTypedValue = new TypedValue();
+ mContext.getTheme().resolveAttribute(R.attr.actionModeShareDrawable, outTypedValue, true);
+ Drawable drawable = mContext.getResources().getDrawable(outTypedValue.resourceId);
+ activityChooserView.setExpandActivityOverflowButtonDrawable(drawable);
+ return activityChooserView;
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ @Override
+ public void onPerformDefaultAction(View actionView) {
+ if (actionView instanceof ActivityChooserView) {
+ ActivityChooserView activityChooserView = (ActivityChooserView) actionView;
+ activityChooserView.showPopup();
+ } else {
+ throw new IllegalArgumentException("actionView not instance of ActivityChooserView");
+ }
+ }
+
+ /**
+ * Sets the file name of a file for persisting the share history which
+ * history will be used for ordering share targets. This file will be used
+ * for all view created by {@link #onCreateActionView()}. Defaults to
+ * {@link #DEFAULT_SHARE_HISTORY_FILE_NAME}. Set to <code>null</code>
+ * if share history should not be persisted between sessions.
+ * <p>
+ * <strong>Note:</strong> The history file name can be set any time, however
+ * only the action views created by {@link #onCreateActionView()} after setting
+ * the file name will be backed by the provided file.
+ * <p>
+ *
+ * @param shareHistoryFile The share history file name.
+ */
+ public void setShareHistoryFileName(String shareHistoryFile) {
+ mShareHistoryFileName = shareHistoryFile;
+ }
+
+ /**
+ * Sets an intent with information about the share action. Here is a
+ * sample for constructing a share intent:
+ * <p>
+ * <pre>
+ * <code>
+ * Intent shareIntent = new Intent(Intent.ACTION_SEND);
+ * shareIntent.setType("image/*");
+ * Uri uri = Uri.fromFile(new File(getFilesDir(), "foo.jpg"));
+ * shareIntent.putExtra(Intent.EXTRA_STREAM, uri.toString());
+ * </pre>
+ * </code>
+ * </p>
+ *
+ * @param actionView An action view created by {@link #onCreateActionView()}.
+ * @param shareIntent The share intent.
+ *
+ * @see Intent#ACTION_SEND
+ * @see Intent#ACTION_SEND_MULTIPLE
+ */
+ public void setShareIntent(View actionView, Intent shareIntent) {
+ if (actionView instanceof ActivityChooserView) {
+ ActivityChooserView activityChooserView = (ActivityChooserView) actionView;
+ activityChooserView.getDataModel().setIntent(shareIntent);
+ } else {
+ throw new IllegalArgumentException("actionView not instance of ActivityChooserView");
+ }
+ }
+}
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
+import android.view.ActionProvider;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.MenuItem;
import android.view.SubMenu;
}
@Override
+ public ActionProvider getActionProvider() {
+ return null;
+ }
+
+ @Override
+ public MenuItem setActionProvider(ActionProvider actionProvider) {
+ throw new UnsupportedOperationException();
+ }
+
+ @Override
public MenuItem setShowAsActionFlags(int actionEnum) {
setShowAsAction(actionEnum);
return this;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.util.Log;
+import android.view.ActionProvider;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.MenuItem;
private int mShowAsAction = SHOW_AS_ACTION_NEVER;
private View mActionView;
+ private ActionProvider mActionProvider;
private OnActionExpandListener mOnActionExpandListener;
private boolean mIsActionViewExpanded = false;
/**
- * Instantiates this menu item. The constructor
- * {@link #MenuItemData(MenuBuilder, int, int, int, CharSequence, int)} is
- * preferred due to lazy loading of the icon Drawable.
- *
+ * Instantiates this menu item.
+ *
* @param menu
* @param group Item ordering grouping control. The item will be added after
* all other items whose order is <= this number, and before any
mItemCallback.run();
return true;
}
-
+
if (mIntent != null) {
try {
mMenu.getContext().startActivity(mIntent);
Log.e(TAG, "Can't find activity to handle intent; ignoring", e);
}
}
-
+
+ if (mActionProvider != null) {
+ // The action view is created by the provider in this case.
+ View actionView = getActionView();
+ mActionProvider.onPerformDefaultAction(actionView);
+ return true;
+ }
+
return false;
}
public MenuItem setActionView(View view) {
mActionView = view;
+ mActionProvider = null;
mMenu.onItemActionRequestChanged(this);
return this;
}
}
public View getActionView() {
- return mActionView;
+ if (mActionView != null) {
+ return mActionView;
+ } else if (mActionProvider != null) {
+ mActionView = mActionProvider.onCreateActionView();
+ return mActionView;
+ } else {
+ return null;
+ }
+ }
+
+ public ActionProvider getActionProvider() {
+ return mActionProvider;
+ }
+
+ public MenuItem setActionProvider(ActionProvider actionProvider) {
+ mActionView = null;
+ mActionProvider = actionProvider;
+ mMenu.onItemsChanged(false);
+ return this;
}
@Override
--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@+id/list_footer"
+ android:paddingLeft="16dip"
+ android:paddingRight="16dip"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:gravity="center"
+ android:orientation="vertical">
+
+ <ImageView
+ android:id="@+id/divider"
+ android:layout_width="match_parent"
+ android:layout_height="2dip"
+ android:scaleType="fitXY"
+ android:gravity="fill_horizontal"
+ android:src="@drawable/divider_strong_holo" />
+
+ <TextView
+ android:id="@+id/title"
+ android:layout_width="wrap_content"
+ android:layout_height="48dip"
+ android:gravity="center"
+ android:textAppearance="?android:attr/textAppearanceLargePopupMenu"
+ android:duplicateParentState="true"
+ android:singleLine="true"
+ android:text="@string/activity_chooser_view_see_all" />
+
+</LinearLayout>
--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@+id/list_header"
+ android:paddingLeft="16dip"
+ android:paddingRight="16dip"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:gravity="center"
+ android:orientation="vertical">
+
+ <TextView
+ android:id="@+id/title"
+ android:layout_width="wrap_content"
+ android:layout_height="?android:attr/dropdownListPreferredItemHeight"
+ android:gravity="center"
+ android:textAppearance="?android:attr/textAppearanceLargePopupMenu"
+ android:duplicateParentState="true"
+ android:singleLine="true" />
+
+ <ImageView
+ android:id="@+id/divider"
+ android:layout_width="match_parent"
+ android:layout_height="2dip"
+ android:scaleType="fitXY"
+ android:gravity="fill_horizontal"
+ android:src="@drawable/divider_strong_holo" />
+
+</LinearLayout>
--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+**
+** Copyright 2011, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@+id/activity_chooser_view_content"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ style="?android:attr/actionButtonStyle">
+
+ <ImageButton android:id="@+id/default_activity_button"
+ android:layout_width="32dip"
+ android:layout_height="32dip"
+ android:layout_marginLeft="16dip" />
+
+ <ImageButton android:id="@+id/expand_activities_button"
+ android:layout_width="32dip"
+ android:layout_height="32dip"
+ android:layout_marginLeft="16dip" />
+
+</LinearLayout>
--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2011 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@+id/list_item"
+ android:layout_width="match_parent"
+ android:layout_height="?android:attr/dropdownListPreferredItemHeight"
+ android:gravity="center_vertical"
+ android:paddingLeft="16dip"
+ android:paddingRight="16dip">
+
+ <ImageView
+ android:id="@+id/icon"
+ android:layout_width="32dip"
+ android:layout_height="32dip"
+ android:layout_gravity="center_vertical"
+ android:layout_marginRight="8dip"
+ android:duplicateParentState="true" />
+
+ <TextView
+ android:id="@+id/title"
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ android:textAppearance="?android:attr/textAppearanceLargePopupMenu"
+ android:singleLine="true"
+ android:duplicateParentState="true"
+ android:ellipsize="marquee"
+ android:fadingEdge="horizontal" />
+
+</LinearLayout>
for more info. -->
<attr name="actionViewClass" format="string" />
+ <!-- The name of an optional ActionProvider class to instantiate an action view
+ and perform operations such as default action for that menu item.
+ See {@link android.view.MenuItem#setActionProvider(android.view.ActionProvider)}
+ for more info. -->
+ <attr name="actionProviderClass" format="string" />
+
+ </declare-styleable>
+
+ <!-- Attrbitutes for a ActvityChooserView. -->
+ <declare-styleable name="ActivityChooserView">
+ <!-- The maximal number of items initially shown in the activity list. -->
+ <attr name="initialActivityCount" format="string" />
+ <!-- The drawable to show in the button for expanding the activities overflow popup.
+ <strong>Note:</strong> Clients would like to set this drawable
+ as a clue about the action the chosen activity will perform. For
+ example, if share activity is to be chosen the drawable should
+ give a clue that sharing is to be performed.
+ -->
+ <attr name="expandActivityOverflowButtonDrawable" format="reference" />
</declare-styleable>
<!-- **************************************************************** -->
<public type="string" name="status_bar_notification_info_overflow" />
<public type="attr" name="textDirection"/>
+
+ <public type="attr" name="actionProviderClass" />
+
</resources>
<!-- Label for an information field on an SSL Certificate Dialog -->
<string name="expires_on">Expires on:</string>
+ <!-- Title for a button to expand the list of activities in ActivityChooserView [CHAR LIMIT=25] -->
+ <string name="activity_chooser_view_see_all">See all...</string>
+ <!-- Title for a message that there are no activities in ActivityChooserView [CHAR LIMIT=25] -->
+ <string name="activity_chooser_view_no_activities">No activities</string>
+ <!-- Title for a message that prompts selection of a default share handler in ActivityChooserView [CHAR LIMIT=25] -->
+ <string name="activity_chooser_view_select_default">Select default</string>
+
</resources>
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