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.util.ArrayMap; 25 import android.util.Log; 26 27 import androidx.annotation.Keep; 28 import androidx.preference.Preference; 29 import androidx.preference.PreferenceScreen; 30 31 import com.android.internal.app.LocalePicker; 32 import com.android.internal.logging.nano.MetricsProto; 33 import com.android.settingslib.development.DevelopmentSettingsEnabler; 34 import com.android.tv.settings.R; 35 import com.android.tv.settings.RadioPreference; 36 import com.android.tv.settings.SettingsPreferenceFragment; 37 38 import java.util.List; 39 import java.util.Locale; 40 import java.util.Map; 41 42 /** 43 * The language settings screen in TV Settings. 44 */ 45 @Keep 46 public class LanguageFragment extends SettingsPreferenceFragment { 47 private static final String TAG = "LanguageFragment"; 48 49 private static final String LANGUAGE_RADIO_GROUP = "language"; 50 51 private final Map<String, LocalePicker.LocaleInfo> mLocaleInfoMap = new ArrayMap<>(); 52 53 // Adjust this value to keep things relatively responsive without janking animations 54 private static final int LANGUAGE_SET_DELAY_MS = 500; 55 private final Handler mDelayHandler = new Handler(); 56 private Locale mNewLocale; 57 private final Runnable mSetLanguageRunnable = new Runnable() { 58 @Override 59 public void run() { 60 LocalePicker.updateLocale(mNewLocale); 61 } 62 }; 63 newInstance()64 public static LanguageFragment newInstance() { 65 return new LanguageFragment(); 66 } 67 68 @Override onCreatePreferences(Bundle savedInstanceState, String rootKey)69 public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { 70 final Context themedContext = getPreferenceManager().getContext(); 71 final PreferenceScreen screen = 72 getPreferenceManager().createPreferenceScreen(themedContext); 73 screen.setTitle(R.string.system_language); 74 75 Locale currentLocale = null; 76 try { 77 currentLocale = ActivityManager.getService().getConfiguration() 78 .getLocales().get(0); 79 } catch (RemoteException e) { 80 Log.e(TAG, "Could not retrieve locale", e); 81 } 82 83 final List<LocalePicker.LocaleInfo> localeInfoList = 84 LocalePicker.getAllAssetLocales(themedContext, 85 DevelopmentSettingsEnabler.isDevelopmentSettingsEnabled(getContext())); 86 87 Preference activePref = null; 88 for (final LocalePicker.LocaleInfo localeInfo : localeInfoList) { 89 final String languageTag = localeInfo.getLocale().toLanguageTag(); 90 mLocaleInfoMap.put(languageTag, localeInfo); 91 92 final RadioPreference radioPreference = new RadioPreference(themedContext); 93 radioPreference.setKey(languageTag); 94 radioPreference.setPersistent(false); 95 radioPreference.setTitle(localeInfo.getLabel()); 96 radioPreference.setRadioGroup(LANGUAGE_RADIO_GROUP); 97 radioPreference.setLayoutResource(R.layout.preference_reversed_widget); 98 99 if (localeInfo.getLocale().equals(currentLocale)) { 100 radioPreference.setChecked(true); 101 activePref = radioPreference; 102 } 103 104 screen.addPreference(radioPreference); 105 } 106 107 if (activePref != null && savedInstanceState == null) { 108 scrollToPreference(activePref); 109 } 110 111 setPreferenceScreen(screen); 112 } 113 114 @Override onPreferenceTreeClick(Preference preference)115 public boolean onPreferenceTreeClick(Preference preference) { 116 if (preference instanceof RadioPreference) { 117 final RadioPreference radioPreference = (RadioPreference) preference; 118 radioPreference.clearOtherRadioPreferences(getPreferenceScreen()); 119 if (radioPreference.isChecked()) { 120 mNewLocale = mLocaleInfoMap.get(radioPreference.getKey()).getLocale(); 121 mDelayHandler.removeCallbacks(mSetLanguageRunnable); 122 mDelayHandler.postDelayed(mSetLanguageRunnable, LANGUAGE_SET_DELAY_MS); 123 } else { 124 radioPreference.setChecked(true); 125 } 126 } 127 return super.onPreferenceTreeClick(preference); 128 } 129 130 @Override getMetricsCategory()131 public int getMetricsCategory() { 132 return MetricsProto.MetricsEvent.SETTINGS_LANGUAGE_CATEGORY; 133 } 134 } 135