1 /* 2 * Copyright (C) 2015 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.tv.settings.system; 18 19 import android.app.ActivityManager; 20 import android.content.Context; 21 import android.os.Bundle; 22 import android.os.Handler; 23 import android.os.RemoteException; 24 import android.support.v7.preference.Preference; 25 import android.support.v7.preference.PreferenceScreen; 26 import android.util.ArrayMap; 27 import android.util.Log; 28 29 import com.android.internal.app.LocalePicker; 30 import com.android.internal.logging.nano.MetricsProto; 31 import com.android.settingslib.development.DevelopmentSettingsEnabler; 32 import com.android.tv.settings.R; 33 import com.android.tv.settings.RadioPreference; 34 import com.android.tv.settings.SettingsPreferenceFragment; 35 36 import java.util.List; 37 import java.util.Locale; 38 import java.util.Map; 39 40 /** 41 * The language settings screen in TV Settings. 42 */ 43 public class LanguageFragment extends SettingsPreferenceFragment { 44 private static final String TAG = "LanguageFragment"; 45 46 private static final String LANGUAGE_RADIO_GROUP = "language"; 47 48 private final Map<String, LocalePicker.LocaleInfo> mLocaleInfoMap = new ArrayMap<>(); 49 50 // Adjust this value to keep things relatively responsive without janking animations 51 private static final int LANGUAGE_SET_DELAY_MS = 500; 52 private final Handler mDelayHandler = new Handler(); 53 private Locale mNewLocale; 54 private final Runnable mSetLanguageRunnable = new Runnable() { 55 @Override 56 public void run() { 57 LocalePicker.updateLocale(mNewLocale); 58 } 59 }; 60 newInstance()61 public static LanguageFragment newInstance() { 62 return new LanguageFragment(); 63 } 64 65 @Override onCreatePreferences(Bundle savedInstanceState, String rootKey)66 public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { 67 final Context themedContext = getPreferenceManager().getContext(); 68 final PreferenceScreen screen = 69 getPreferenceManager().createPreferenceScreen(themedContext); 70 screen.setTitle(R.string.system_language); 71 72 Locale currentLocale = null; 73 try { 74 currentLocale = ActivityManager.getService().getConfiguration() 75 .getLocales().get(0); 76 } catch (RemoteException e) { 77 Log.e(TAG, "Could not retrieve locale", e); 78 } 79 80 final List<LocalePicker.LocaleInfo> localeInfoList = 81 LocalePicker.getAllAssetLocales(themedContext, 82 DevelopmentSettingsEnabler.isDevelopmentSettingsEnabled(getContext())); 83 84 Preference activePref = null; 85 for (final LocalePicker.LocaleInfo localeInfo : localeInfoList) { 86 final String languageTag = localeInfo.getLocale().toLanguageTag(); 87 mLocaleInfoMap.put(languageTag, localeInfo); 88 89 final RadioPreference radioPreference = new RadioPreference(themedContext); 90 radioPreference.setKey(languageTag); 91 radioPreference.setPersistent(false); 92 radioPreference.setTitle(localeInfo.getLabel()); 93 radioPreference.setRadioGroup(LANGUAGE_RADIO_GROUP); 94 radioPreference.setLayoutResource(R.layout.preference_reversed_widget); 95 96 if (localeInfo.getLocale().equals(currentLocale)) { 97 radioPreference.setChecked(true); 98 activePref = radioPreference; 99 } 100 101 screen.addPreference(radioPreference); 102 } 103 104 if (activePref != null && savedInstanceState == null) { 105 scrollToPreference(activePref); 106 } 107 108 setPreferenceScreen(screen); 109 } 110 111 @Override onPreferenceTreeClick(Preference preference)112 public boolean onPreferenceTreeClick(Preference preference) { 113 if (preference instanceof RadioPreference) { 114 final RadioPreference radioPreference = (RadioPreference) preference; 115 radioPreference.clearOtherRadioPreferences(getPreferenceScreen()); 116 if (radioPreference.isChecked()) { 117 mNewLocale = mLocaleInfoMap.get(radioPreference.getKey()).getLocale(); 118 mDelayHandler.removeCallbacks(mSetLanguageRunnable); 119 mDelayHandler.postDelayed(mSetLanguageRunnable, LANGUAGE_SET_DELAY_MS); 120 } else { 121 radioPreference.setChecked(true); 122 } 123 } 124 return super.onPreferenceTreeClick(preference); 125 } 126 127 @Override getMetricsCategory()128 public int getMetricsCategory() { 129 return MetricsProto.MetricsEvent.SETTINGS_LANGUAGE_CATEGORY; 130 } 131 } 132