src/com/android/settings/LanguageSettings.java

   1 /*
   2  * Copyright (C) 2008 The Android Open Source Project
   3  *
   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
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 package com.android.settings;
  18
  19 import android.app.AlertDialog;
  20 import android.app.Dialog;
  21 import android.content.Context;
  22 import android.content.DialogInterface;
  23 import android.content.Intent;
  24 import android.content.pm.ApplicationInfo;
  25 import android.content.res.Configuration;
  26 import android.os.Bundle;
  27 import android.os.Environment;
  28 import android.os.SystemProperties;
  29 import android.preference.CheckBoxPreference;
  30 import android.preference.Preference;
  31 import android.preference.PreferenceActivity;
  32 import android.preference.PreferenceGroup;
  33 import android.preference.PreferenceScreen;
  34 import android.provider.Settings;
  35 import android.text.TextUtils;
  36 import android.view.View.OnClickListener;
  37 import android.view.inputmethod.InputMethodInfo;
  38 import android.view.inputmethod.InputMethodManager;
  39
  40 import java.util.ArrayList;
  41 import java.util.HashSet;
  42 import java.util.List;
  43
  44 public class LanguageSettings extends PreferenceActivity {
  45
  46     private static final String KEY_PHONE_LANGUAGE = "phone_language";
  47     private static final String KEY_KEYBOARD_SETTINGS_CATEGORY = "keyboard_settings_category";
  48     private static final String KEY_HARDKEYBOARD_CATEGORY = "hardkeyboard_category";
  49     private boolean mHaveHardKeyboard;
  50
  51     private List<InputMethodInfo> mInputMethodProperties;
  52     private List<CheckBoxPreference> mCheckboxes;
  53     private Preference mLanguagePref;
  54
  55     final TextUtils.SimpleStringSplitter mStringColonSplitter
  56             = new TextUtils.SimpleStringSplitter(':');
  57
  58     private String mLastInputMethodId;
  59     private String mLastTickedInputMethodId;
  60
  61     private AlertDialog mDialog = null;
  62
  63     static public String getInputMethodIdFromKey(String key) {
  64         return key;
  65     }
  66
  67     @Override
  68     protected void onCreate(Bundle icicle) {
  69         super.onCreate(icicle);
  70
  71         addPreferencesFromResource(R.xml.language_settings);
  72
  73         if (getAssets().getLocales().length == 1) {
  74             getPreferenceScreen().
  75                 removePreference(findPreference(KEY_PHONE_LANGUAGE));
  76         } else {
  77             mLanguagePref = findPreference(KEY_PHONE_LANGUAGE);
  78         }
  79
  80         Configuration config = getResources().getConfiguration();
  81         if (config.keyboard != Configuration.KEYBOARD_QWERTY) {
  82             getPreferenceScreen().removePreference(
  83                     getPreferenceScreen().findPreference(KEY_HARDKEYBOARD_CATEGORY));
  84         } else {
  85             mHaveHardKeyboard = true;
  86         }
  87         mCheckboxes = new ArrayList<CheckBoxPreference>();
  88         onCreateIMM();
  89     }
  90
  91     private boolean isSystemIme(InputMethodInfo property) {
  92         return (property.getServiceInfo().applicationInfo.flags
  93                 & ApplicationInfo.FLAG_SYSTEM) != 0;
  94     }
  95
  96     private void onCreateIMM() {
  97         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
  98
  99         mInputMethodProperties = imm.getInputMethodList();
 100
 101         mLastInputMethodId = Settings.Secure.getString(getContentResolver(),
 102             Settings.Secure.DEFAULT_INPUT_METHOD);
 103
 104         PreferenceGroup keyboardSettingsCategory = (PreferenceGroup) findPreference(
 105                 KEY_KEYBOARD_SETTINGS_CATEGORY);
 106
 107         int N = (mInputMethodProperties == null ? 0 : mInputMethodProperties
 108                 .size());
 109         for (int i = 0; i < N; ++i) {
 110             InputMethodInfo property = mInputMethodProperties.get(i);
 111             String prefKey = property.getId();
 112
 113             CharSequence label = property.loadLabel(getPackageManager());
 114             boolean systemIME = isSystemIme(property);
 115             // Add a check box.
 116             // Don't show the toggle if it's the only keyboard in the system, or it's a system IME.
 117             if (mHaveHardKeyboard || (N > 1 && !systemIME)) {
 118                 CheckBoxPreference chkbxPref = new CheckBoxPreference(this);
 119                 chkbxPref.setKey(prefKey);
 120                 chkbxPref.setTitle(label);
 121                 keyboardSettingsCategory.addPreference(chkbxPref);
 122                 mCheckboxes.add(chkbxPref);
 123             }
 124
 125             // If setting activity is available, add a setting screen entry.
 126             if (null != property.getSettingsActivity()) {
 127                 PreferenceScreen prefScreen = new PreferenceScreen(this, null);
 128                 String settingsActivity = property.getSettingsActivity();
 129                 if (settingsActivity.lastIndexOf("/") < 0) {
 130                     settingsActivity = property.getPackageName() + "/" + settingsActivity;
 131                 }
 132                 prefScreen.setKey(settingsActivity);
 133                 prefScreen.setTitle(label);
 134                 if (N == 1) {
 135                     prefScreen.setSummary(getString(R.string.onscreen_keyboard_settings_summary));
 136                 } else {
 137                     CharSequence settingsLabel = getResources().getString(
 138                             R.string.input_methods_settings_label_format, label);
 139                     prefScreen.setSummary(settingsLabel);
 140                 }
 141                 keyboardSettingsCategory.addPreference(prefScreen);
 142             }
 143         }
 144     }
 145
 146     @Override
 147     protected void onResume() {
 148         super.onResume();
 149
 150         final HashSet<String> enabled = new HashSet<String>();
 151         String enabledStr = Settings.Secure.getString(getContentResolver(),
 152                 Settings.Secure.ENABLED_INPUT_METHODS);
 153         if (enabledStr != null) {
 154             final TextUtils.SimpleStringSplitter splitter = mStringColonSplitter;
 155             splitter.setString(enabledStr);
 156             while (splitter.hasNext()) {
 157                 enabled.add(splitter.next());
 158             }
 159         }
 160
 161         // Update the statuses of the Check Boxes.
 162         int N = mInputMethodProperties.size();
 163         for (int i = 0; i < N; ++i) {
 164             final String id = mInputMethodProperties.get(i).getId();
 165             CheckBoxPreference pref = (CheckBoxPreference) findPreference(mInputMethodProperties
 166                     .get(i).getId());
 167             if (pref != null) {
 168                 pref.setChecked(enabled.contains(id));
 169             }
 170         }
 171         mLastTickedInputMethodId = null;
 172
 173         if (mLanguagePref != null) {
 174             Configuration conf = getResources().getConfiguration();
 175             String locale = conf.locale.getDisplayName(conf.locale);
 176             if (locale != null && locale.length() > 1) {
 177                 locale = Character.toUpperCase(locale.charAt(0)) + locale.substring(1);
 178                 mLanguagePref.setSummary(locale);
 179             }
 180         }
 181     }
 182
 183     @Override
 184     protected void onPause() {
 185         super.onPause();
 186
 187         StringBuilder builder = new StringBuilder(256);
 188         StringBuilder disabledSysImes = new StringBuilder(256);
 189
 190         int firstEnabled = -1;
 191         int N = mInputMethodProperties.size();
 192         for (int i = 0; i < N; ++i) {
 193             final InputMethodInfo property = mInputMethodProperties.get(i);
 194             final String id = property.getId();
 195             CheckBoxPreference pref = (CheckBoxPreference) findPreference(id);
 196             boolean hasIt = id.equals(mLastInputMethodId);
 197             boolean systemIme = isSystemIme(property);
 198             if (((N == 1 || systemIme) && !mHaveHardKeyboard)
 199                     || (pref != null && pref.isChecked())) {
 200                 if (builder.length() > 0) builder.append(':');
 201                 builder.append(id);
 202                 if (firstEnabled < 0) {
 203                     firstEnabled = i;
 204                 }
 205             } else if (hasIt) {
 206                 mLastInputMethodId = mLastTickedInputMethodId;
 207             }
 208             // If it's a disabled system ime, add it to the disabled list so that it
 209             // doesn't get enabled automatically on any changes to the package list
 210             if (pref != null && !pref.isChecked() && systemIme && mHaveHardKeyboard) {
 211                 if (disabledSysImes.length() > 0) disabledSysImes.append(":");
 212                 disabledSysImes.append(id);
 213             }
 214         }
 215
 216         // If the last input method is unset, set it as the first enabled one.
 217         if (null == mLastInputMethodId || "".equals(mLastInputMethodId)) {
 218             if (firstEnabled >= 0) {
 219                 mLastInputMethodId = mInputMethodProperties.get(firstEnabled).getId();
 220             } else {
 221                 mLastInputMethodId = null;
 222             }
 223         }
 224
 225         Settings.Secure.putString(getContentResolver(),
 226             Settings.Secure.ENABLED_INPUT_METHODS, builder.toString());
 227         Settings.Secure.putString(getContentResolver(),
 228                 Settings.Secure.DISABLED_SYSTEM_INPUT_METHODS, disabledSysImes.toString());
 229         Settings.Secure.putString(getContentResolver(),
 230             Settings.Secure.DEFAULT_INPUT_METHOD,
 231             mLastInputMethodId != null ? mLastInputMethodId : "");
 232     }
 233
 234     @Override
 235     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
 236
 237         // Input Method stuff
 238         if (Utils.isMonkeyRunning()) {
 239             return false;
 240         }
 241
 242         if (preference instanceof CheckBoxPreference) {
 243             final CheckBoxPreference chkPref = (CheckBoxPreference) preference;
 244             final String id = getInputMethodIdFromKey(chkPref.getKey());
 245             if (chkPref.isChecked()) {
 246                 InputMethodInfo selImi = null;
 247                 final int N = mInputMethodProperties.size();
 248                 for (int i=0; i<N; i++) {
 249                     InputMethodInfo imi = mInputMethodProperties.get(i);
 250                     if (id.equals(imi.getId())) {
 251                         selImi = imi;
 252                         if (isSystemIme(imi)) {
 253                             // This is a built-in IME, so no need to warn.
 254                             mLastTickedInputMethodId = id;
 255                             return super.onPreferenceTreeClick(preferenceScreen, preference);
 256                         }
 257                     }
 258                 }
 259                 chkPref.setChecked(false);
 260                 if (selImi == null) {
 261                     return super.onPreferenceTreeClick(preferenceScreen, preference);
 262                 }
 263                 if (mDialog == null) {
 264                     mDialog = (new AlertDialog.Builder(this))
 265                             .setTitle(android.R.string.dialog_alert_title)
 266                             .setIcon(android.R.drawable.ic_dialog_alert)
 267                             .setCancelable(true)
 268                             .setPositiveButton(android.R.string.ok,
 269                                     new DialogInterface.OnClickListener() {
 270                                         public void onClick(DialogInterface dialog, int which) {
 271                                             chkPref.setChecked(true);
 272                                             mLastTickedInputMethodId = id;
 273                                         }
 274
 275                             })
 276                             .setNegativeButton(android.R.string.cancel,
 277                                     new DialogInterface.OnClickListener() {
 278                                         public void onClick(DialogInterface dialog, int which) {
 279                                         }
 280
 281                             })
 282                             .create();
 283                 } else {
 284                     if (mDialog.isShowing()) {
 285                         mDialog.dismiss();
 286                     }
 287                 }
 288                 mDialog.setMessage(getString(R.string.ime_security_warning,
 289                         selImi.getServiceInfo().applicationInfo.loadLabel(
 290                                 getPackageManager())));
 291                 mDialog.show();
 292             } else if (id.equals(mLastTickedInputMethodId)) {
 293                 mLastTickedInputMethodId = null;
 294             }
 295         } else if (preference instanceof PreferenceScreen) {
 296             if (preference.getIntent() == null) {
 297                 PreferenceScreen pref = (PreferenceScreen) preference;
 298                 String activityName = pref.getKey();
 299                 String packageName = activityName.substring(0, activityName
 300                         .lastIndexOf("."));
 301                 int slash = activityName.indexOf("/");
 302                 if (slash > 0) {
 303                     packageName = activityName.substring(0, slash);
 304                     activityName = activityName.substring(slash + 1);
 305                 }
 306                 if (activityName.length() > 0) {
 307                     Intent i = new Intent(Intent.ACTION_MAIN);
 308                     i.setClassName(packageName, activityName);
 309                     startActivity(i);
 310                 }
 311             }
 312         }
 313         return super.onPreferenceTreeClick(preferenceScreen, preference);
 314     }
 315
 316     @Override
 317     protected void onDestroy() {
 318         super.onDestroy();
 319         if (mDialog != null) {
 320             mDialog.dismiss();
 321             mDialog = null;
 322         }
 323     }
 324
 325 }