2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.android.settings;
19 import android.app.Activity;
20 import android.app.Dialog;
21 import android.app.DialogFragment;
22 import android.app.Fragment;
23 import android.content.ContentResolver;
24 import android.content.Context;
25 import android.content.DialogInterface;
26 import android.content.Intent;
27 import android.content.pm.PackageManager;
28 import android.os.Bundle;
29 import android.support.annotation.XmlRes;
30 import android.support.v7.preference.Preference;
31 import android.support.v7.preference.PreferenceGroup;
32 import android.support.v7.preference.PreferenceGroupAdapter;
33 import android.support.v7.preference.PreferenceScreen;
34 import android.support.v7.preference.PreferenceViewHolder;
35 import android.support.v7.widget.LinearLayoutManager;
36 import android.support.v7.widget.RecyclerView;
37 import android.text.TextUtils;
38 import android.util.ArrayMap;
39 import android.util.Log;
40 import android.view.LayoutInflater;
41 import android.view.Menu;
42 import android.view.MenuInflater;
43 import android.view.View;
44 import android.view.ViewGroup;
45 import android.widget.Button;
47 import com.android.settings.applications.LayoutPreference;
48 import com.android.settings.core.InstrumentedFragment;
49 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
50 import com.android.settingslib.HelpUtils;
52 import java.util.UUID;
55 * Base class for Settings fragments, with some helper functions and dialog management.
57 public abstract class SettingsPreferenceFragment extends InstrumentedFragment
58 implements DialogCreatable {
61 * The Help Uri Resource key. This can be passed as an extra argument when creating the
64 public static final String HELP_URI_RESOURCE_KEY = "help_uri_resource";
66 private static final String TAG = "SettingsPreference";
68 private static final int DELAY_HIGHLIGHT_DURATION_MILLIS = 600;
70 private static final String SAVE_HIGHLIGHTED_KEY = "android:preference_highlighted";
72 private SettingsDialogFragment mDialogFragment;
74 private String mHelpUri;
76 private static final int ORDER_FIRST = -1;
77 private static final int ORDER_LAST = Integer.MAX_VALUE -1;
79 // Cache the content resolver for async callbacks
80 private ContentResolver mContentResolver;
82 private String mPreferenceKey;
83 private boolean mPreferenceHighlighted = false;
85 private RecyclerView.Adapter mCurrentRootAdapter;
86 private boolean mIsDataSetObserverRegistered = false;
87 private RecyclerView.AdapterDataObserver mDataSetObserver =
88 new RecyclerView.AdapterDataObserver() {
90 public void onChanged() {
95 public void onItemRangeChanged(int positionStart, int itemCount) {
100 public void onItemRangeChanged(int positionStart, int itemCount, Object payload) {
105 public void onItemRangeInserted(int positionStart, int itemCount) {
110 public void onItemRangeRemoved(int positionStart, int itemCount) {
115 public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
120 private ViewGroup mPinnedHeaderFrameLayout;
121 private ViewGroup mButtonBar;
123 private LayoutPreference mHeader;
125 private LayoutPreference mFooter;
126 private View mEmptyView;
127 private LinearLayoutManager mLayoutManager;
128 private HighlightablePreferenceGroupAdapter mAdapter;
129 private ArrayMap<String, Preference> mPreferenceCache;
130 private boolean mAnimationAllowed;
133 public void onCreate(Bundle icicle) {
134 super.onCreate(icicle);
136 if (icicle != null) {
137 mPreferenceHighlighted = icicle.getBoolean(SAVE_HIGHLIGHTED_KEY);
140 // Prepare help url and enable menu if necessary
141 Bundle arguments = getArguments();
143 if (arguments != null && arguments.containsKey(HELP_URI_RESOURCE_KEY)) {
144 helpResource = arguments.getInt(HELP_URI_RESOURCE_KEY);
146 helpResource = getHelpResource();
148 if (helpResource != 0) {
149 mHelpUri = getResources().getString(helpResource);
154 public View onCreateView(LayoutInflater inflater, ViewGroup container,
155 Bundle savedInstanceState) {
156 final View root = super.onCreateView(inflater, container, savedInstanceState);
157 mPinnedHeaderFrameLayout = (ViewGroup) root.findViewById(R.id.pinned_header);
158 mButtonBar = (ViewGroup) root.findViewById(R.id.button_bar);
163 public void addPreferencesFromResource(@XmlRes int preferencesResId) {
164 super.addPreferencesFromResource(preferencesResId);
165 checkAvailablePrefs(getPreferenceScreen());
168 private void checkAvailablePrefs(PreferenceGroup preferenceGroup) {
169 if (preferenceGroup == null) return;
170 for (int i = 0; i < preferenceGroup.getPreferenceCount(); i++) {
171 Preference pref = preferenceGroup.getPreference(i);
172 if (pref instanceof SelfAvailablePreference
173 && !((SelfAvailablePreference) pref).isAvailable(getContext())) {
174 preferenceGroup.removePreference(pref);
175 } else if (pref instanceof PreferenceGroup) {
176 checkAvailablePrefs((PreferenceGroup) pref);
181 public ViewGroup getButtonBar() {
185 public View setPinnedHeaderView(int layoutResId) {
186 final LayoutInflater inflater = getActivity().getLayoutInflater();
187 final View pinnedHeader =
188 inflater.inflate(layoutResId, mPinnedHeaderFrameLayout, false);
189 setPinnedHeaderView(pinnedHeader);
193 public void setPinnedHeaderView(View pinnedHeader) {
194 mPinnedHeaderFrameLayout.addView(pinnedHeader);
195 mPinnedHeaderFrameLayout.setVisibility(View.VISIBLE);
199 public void onSaveInstanceState(Bundle outState) {
200 super.onSaveInstanceState(outState);
202 outState.putBoolean(SAVE_HIGHLIGHTED_KEY, mPreferenceHighlighted);
206 public void onActivityCreated(Bundle savedInstanceState) {
207 super.onActivityCreated(savedInstanceState);
208 setHasOptionsMenu(true);
212 public void onResume() {
215 final Bundle args = getArguments();
217 mPreferenceKey = args.getString(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY);
218 highlightPreferenceIfNeeded();
223 protected void onBindPreferences() {
224 registerObserverIfNeeded();
228 protected void onUnbindPreferences() {
229 unregisterObserverIfNeeded();
232 public void showLoadingWhenEmpty() {
233 View loading = getView().findViewById(R.id.loading_container);
234 setEmptyView(loading);
237 public void setLoading(boolean loading, boolean animate) {
238 View loading_container = getView().findViewById(R.id.loading_container);
239 Utils.handleLoadingContainer(loading_container, getListView(), !loading, animate);
242 public void registerObserverIfNeeded() {
243 if (!mIsDataSetObserverRegistered) {
244 if (mCurrentRootAdapter != null) {
245 mCurrentRootAdapter.unregisterAdapterDataObserver(mDataSetObserver);
247 mCurrentRootAdapter = getListView().getAdapter();
248 mCurrentRootAdapter.registerAdapterDataObserver(mDataSetObserver);
249 mIsDataSetObserverRegistered = true;
254 public void unregisterObserverIfNeeded() {
255 if (mIsDataSetObserverRegistered) {
256 if (mCurrentRootAdapter != null) {
257 mCurrentRootAdapter.unregisterAdapterDataObserver(mDataSetObserver);
258 mCurrentRootAdapter = null;
260 mIsDataSetObserverRegistered = false;
264 public void highlightPreferenceIfNeeded() {
265 if (isAdded() && !mPreferenceHighlighted &&!TextUtils.isEmpty(mPreferenceKey)) {
266 highlightPreference(mPreferenceKey);
270 protected void onDataSetChanged() {
271 highlightPreferenceIfNeeded();
275 public LayoutPreference getHeaderView() {
279 public LayoutPreference getFooterView() {
283 protected void setHeaderView(int resource) {
284 mHeader = new LayoutPreference(getPrefContext(), resource);
285 addPreferenceToTop(mHeader);
288 protected void setHeaderView(View view) {
289 mHeader = new LayoutPreference(getPrefContext(), view);
290 addPreferenceToTop(mHeader);
293 private void addPreferenceToTop(LayoutPreference preference) {
294 preference.setOrder(ORDER_FIRST);
295 if (getPreferenceScreen() != null) {
296 getPreferenceScreen().addPreference(preference);
300 protected void setFooterView(int resource) {
301 setFooterView(resource != 0 ? new LayoutPreference(getPrefContext(), resource) : null);
304 protected void setFooterView(View v) {
305 setFooterView(v != null ? new LayoutPreference(getPrefContext(), v) : null);
308 private void setFooterView(LayoutPreference footer) {
309 if (getPreferenceScreen() != null && mFooter != null) {
310 getPreferenceScreen().removePreference(mFooter);
312 if (footer != null) {
314 mFooter.setOrder(ORDER_LAST);
315 if (getPreferenceScreen() != null) {
316 getPreferenceScreen().addPreference(mFooter);
324 public void setPreferenceScreen(PreferenceScreen preferenceScreen) {
325 if (preferenceScreen != null && !preferenceScreen.isAttached()) {
326 // Without ids generated, the RecyclerView won't animate changes to the preferences.
327 preferenceScreen.setShouldUseGeneratedIds(mAnimationAllowed);
329 super.setPreferenceScreen(preferenceScreen);
330 if (preferenceScreen != null) {
331 if (mHeader != null) {
332 preferenceScreen.addPreference(mHeader);
334 if (mFooter != null) {
335 preferenceScreen.addPreference(mFooter);
340 private void updateEmptyView() {
341 if (mEmptyView == null) return;
342 if (getPreferenceScreen() != null) {
343 boolean show = (getPreferenceScreen().getPreferenceCount()
344 - (mHeader != null ? 1 : 0)
345 - (mFooter != null ? 1 : 0)) <= 0;
346 mEmptyView.setVisibility(show ? View.VISIBLE : View.GONE);
348 mEmptyView.setVisibility(View.VISIBLE);
352 public void setEmptyView(View v) {
353 if (mEmptyView != null) {
354 mEmptyView.setVisibility(View.GONE);
360 public View getEmptyView() {
365 * Return a valid ListView position or -1 if none is found
367 private int canUseListViewForHighLighting(String key) {
368 if (getListView() == null) {
372 RecyclerView listView = getListView();
373 RecyclerView.Adapter adapter = listView.getAdapter();
375 if (adapter != null && adapter instanceof PreferenceGroupAdapter) {
376 return findListPositionFromKey((PreferenceGroupAdapter) adapter, key);
383 public RecyclerView.LayoutManager onCreateLayoutManager() {
384 mLayoutManager = new LinearLayoutManager(getContext());
385 return mLayoutManager;
389 protected RecyclerView.Adapter onCreateAdapter(PreferenceScreen preferenceScreen) {
390 mAdapter = new HighlightablePreferenceGroupAdapter(preferenceScreen);
394 protected void setAnimationAllowed(boolean animationAllowed) {
395 mAnimationAllowed = animationAllowed;
398 protected void cacheRemoveAllPrefs(PreferenceGroup group) {
399 mPreferenceCache = new ArrayMap<String, Preference>();
400 final int N = group.getPreferenceCount();
401 for (int i = 0; i < N; i++) {
402 Preference p = group.getPreference(i);
403 if (TextUtils.isEmpty(p.getKey())) {
406 mPreferenceCache.put(p.getKey(), p);
410 protected Preference getCachedPreference(String key) {
411 return mPreferenceCache != null ? mPreferenceCache.remove(key) : null;
414 protected void removeCachedPrefs(PreferenceGroup group) {
415 for (Preference p : mPreferenceCache.values()) {
416 group.removePreference(p);
418 mPreferenceCache = null;
421 protected int getCachedCount() {
422 return mPreferenceCache != null ? mPreferenceCache.size() : 0;
425 private void highlightPreference(String key) {
426 final int position = canUseListViewForHighLighting(key);
428 mPreferenceHighlighted = true;
429 mLayoutManager.scrollToPosition(position);
431 getView().postDelayed(new Runnable() {
434 mAdapter.highlight(position);
436 }, DELAY_HIGHLIGHT_DURATION_MILLIS);
440 private int findListPositionFromKey(PreferenceGroupAdapter adapter, String key) {
441 final int count = adapter.getItemCount();
442 for (int n = 0; n < count; n++) {
443 final Preference preference = adapter.getItem(n);
444 final String preferenceKey = preference.getKey();
445 if (preferenceKey != null && preferenceKey.equals(key)) {
452 protected void removePreference(String key) {
453 Preference pref = findPreference(key);
455 getPreferenceScreen().removePreference(pref);
460 * Override this if you want to show a help item in the menu, by returning the resource id.
461 * @return the resource id for the help url
463 protected int getHelpResource() {
464 return R.string.help_uri_default;
468 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
469 if (mHelpUri != null && getActivity() != null) {
470 HelpUtils.prepareHelpMenuItem(getActivity(), menu, mHelpUri, getClass().getName());
475 * The name is intentionally made different from Activity#finish(), so that
476 * users won't misunderstand its meaning.
478 public final void finishFragment() {
479 getActivity().onBackPressed();
482 // Some helpers for functions used by the settings fragments when they were activities
485 * Returns the ContentResolver from the owning Activity.
487 protected ContentResolver getContentResolver() {
488 Context context = getActivity();
489 if (context != null) {
490 mContentResolver = context.getContentResolver();
492 return mContentResolver;
496 * Returns the specified system service from the owning Activity.
498 protected Object getSystemService(final String name) {
499 return getActivity().getSystemService(name);
503 * Returns the PackageManager from the owning Activity.
505 protected PackageManager getPackageManager() {
506 return getActivity().getPackageManager();
510 public void onDetach() {
512 if (mDialogFragment != null) {
513 mDialogFragment.dismiss();
514 mDialogFragment = null;
522 protected void showDialog(int dialogId) {
523 if (mDialogFragment != null) {
524 Log.e(TAG, "Old dialog fragment not null!");
526 mDialogFragment = new SettingsDialogFragment(this, dialogId);
527 mDialogFragment.show(getChildFragmentManager(), Integer.toString(dialogId));
531 public Dialog onCreateDialog(int dialogId) {
536 public int getDialogMetricsCategory(int dialogId) {
540 protected void removeDialog(int dialogId) {
541 // mDialogFragment may not be visible yet in parent fragment's onResume().
542 // To be able to dismiss dialog at that time, don't check
543 // mDialogFragment.isVisible().
544 if (mDialogFragment != null && mDialogFragment.getDialogId() == dialogId) {
545 mDialogFragment.dismissAllowingStateLoss();
547 mDialogFragment = null;
551 * Sets the OnCancelListener of the dialog shown. This method can only be
552 * called after showDialog(int) and before removeDialog(int). The method
553 * does nothing otherwise.
555 protected void setOnCancelListener(DialogInterface.OnCancelListener listener) {
556 if (mDialogFragment != null) {
557 mDialogFragment.mOnCancelListener = listener;
562 * Sets the OnDismissListener of the dialog shown. This method can only be
563 * called after showDialog(int) and before removeDialog(int). The method
564 * does nothing otherwise.
566 protected void setOnDismissListener(DialogInterface.OnDismissListener listener) {
567 if (mDialogFragment != null) {
568 mDialogFragment.mOnDismissListener = listener;
572 public void onDialogShowing() {
573 // override in subclass to attach a dismiss listener, for instance
577 public void onDisplayPreferenceDialog(Preference preference) {
578 if (preference.getKey() == null) {
579 // Auto-key preferences that don't have a key, so the dialog can find them.
580 preference.setKey(UUID.randomUUID().toString());
582 DialogFragment f = null;
583 if (preference instanceof RestrictedListPreference) {
584 f = RestrictedListPreference.RestrictedListPreferenceDialogFragment
585 .newInstance(preference.getKey());
586 } else if (preference instanceof CustomListPreference) {
587 f = CustomListPreference.CustomListPreferenceDialogFragment
588 .newInstance(preference.getKey());
589 } else if (preference instanceof CustomDialogPreference) {
590 f = CustomDialogPreference.CustomPreferenceDialogFragment
591 .newInstance(preference.getKey());
592 } else if (preference instanceof CustomEditTextPreference) {
593 f = CustomEditTextPreference.CustomPreferenceDialogFragment
594 .newInstance(preference.getKey());
596 super.onDisplayPreferenceDialog(preference);
599 f.setTargetFragment(this, 0);
600 f.show(getFragmentManager(), "dialog_preference");
604 public static class SettingsDialogFragment extends InstrumentedDialogFragment {
605 private static final String KEY_DIALOG_ID = "key_dialog_id";
606 private static final String KEY_PARENT_FRAGMENT_ID = "key_parent_fragment_id";
608 private Fragment mParentFragment;
610 private DialogInterface.OnCancelListener mOnCancelListener;
611 private DialogInterface.OnDismissListener mOnDismissListener;
613 public SettingsDialogFragment() {
617 public SettingsDialogFragment(DialogCreatable fragment, int dialogId) {
618 super(fragment, dialogId);
619 if (!(fragment instanceof Fragment)) {
620 throw new IllegalArgumentException("fragment argument must be an instance of "
621 + Fragment.class.getName());
623 mParentFragment = (Fragment) fragment;
628 public int getMetricsCategory() {
629 final int metricsCategory = mDialogCreatable.getDialogMetricsCategory(mDialogId);
630 if (metricsCategory <= 0) {
631 throw new IllegalStateException("Dialog must provide a metrics category");
633 return metricsCategory;
637 public void onSaveInstanceState(Bundle outState) {
638 super.onSaveInstanceState(outState);
639 if (mParentFragment != null) {
640 outState.putInt(KEY_DIALOG_ID, mDialogId);
641 outState.putInt(KEY_PARENT_FRAGMENT_ID, mParentFragment.getId());
646 public void onStart() {
649 if (mParentFragment != null && mParentFragment instanceof SettingsPreferenceFragment) {
650 ((SettingsPreferenceFragment) mParentFragment).onDialogShowing();
655 public Dialog onCreateDialog(Bundle savedInstanceState) {
656 if (savedInstanceState != null) {
657 mDialogId = savedInstanceState.getInt(KEY_DIALOG_ID, 0);
658 mParentFragment = getParentFragment();
659 int mParentFragmentId = savedInstanceState.getInt(KEY_PARENT_FRAGMENT_ID, -1);
660 if (mParentFragment == null) {
661 mParentFragment = getFragmentManager().findFragmentById(mParentFragmentId);
663 if (!(mParentFragment instanceof DialogCreatable)) {
664 throw new IllegalArgumentException(
665 (mParentFragment != null
666 ? mParentFragment.getClass().getName()
669 + DialogCreatable.class.getName());
671 // This dialog fragment could be created from non-SettingsPreferenceFragment
672 if (mParentFragment instanceof SettingsPreferenceFragment) {
673 // restore mDialogFragment in mParentFragment
674 ((SettingsPreferenceFragment) mParentFragment).mDialogFragment = this;
677 return ((DialogCreatable) mParentFragment).onCreateDialog(mDialogId);
681 public void onCancel(DialogInterface dialog) {
682 super.onCancel(dialog);
683 if (mOnCancelListener != null) {
684 mOnCancelListener.onCancel(dialog);
689 public void onDismiss(DialogInterface dialog) {
690 super.onDismiss(dialog);
691 if (mOnDismissListener != null) {
692 mOnDismissListener.onDismiss(dialog);
696 public int getDialogId() {
701 public void onDetach() {
704 // This dialog fragment could be created from non-SettingsPreferenceFragment
705 if (mParentFragment instanceof SettingsPreferenceFragment) {
706 // in case the dialog is not explicitly removed by removeDialog()
707 if (((SettingsPreferenceFragment) mParentFragment).mDialogFragment == this) {
708 ((SettingsPreferenceFragment) mParentFragment).mDialogFragment = null;
714 protected boolean hasNextButton() {
715 return ((ButtonBarHandler)getActivity()).hasNextButton();
718 protected Button getNextButton() {
719 return ((ButtonBarHandler)getActivity()).getNextButton();
722 public void finish() {
723 Activity activity = getActivity();
724 if (activity == null) return;
725 if (getFragmentManager().getBackStackEntryCount() > 0) {
726 getFragmentManager().popBackStack();
732 protected Intent getIntent() {
733 if (getActivity() == null) {
736 return getActivity().getIntent();
739 protected void setResult(int result, Intent intent) {
740 if (getActivity() == null) {
743 getActivity().setResult(result, intent);
746 protected void setResult(int result) {
747 if (getActivity() == null) {
750 getActivity().setResult(result);
753 protected final Context getPrefContext() {
754 return getPreferenceManager().getContext();
757 public boolean startFragment(Fragment caller, String fragmentClass, int titleRes,
758 int requestCode, Bundle extras) {
759 final Activity activity = getActivity();
760 if (activity instanceof SettingsActivity) {
761 SettingsActivity sa = (SettingsActivity) activity;
762 sa.startPreferencePanel(fragmentClass, extras, titleRes, null, caller, requestCode);
766 "Parent isn't SettingsActivity nor PreferenceActivity, thus there's no way to "
767 + "launch the given Fragment (name: " + fragmentClass
768 + ", requestCode: " + requestCode + ")");
773 public static class HighlightablePreferenceGroupAdapter extends PreferenceGroupAdapter {
775 private int mHighlightPosition = -1;
777 public HighlightablePreferenceGroupAdapter(PreferenceGroup preferenceGroup) {
778 super(preferenceGroup);
781 public void highlight(int position) {
782 mHighlightPosition = position;
783 notifyDataSetChanged();
787 public void onBindViewHolder(PreferenceViewHolder holder, int position) {
788 super.onBindViewHolder(holder, position);
789 if (position == mHighlightPosition) {
790 View v = holder.itemView;
791 if (v.getBackground() != null) {
792 final int centerX = v.getWidth() / 2;
793 final int centerY = v.getHeight() / 2;
794 v.getBackground().setHotspot(centerX, centerY);
798 mHighlightPosition = -1;