Android7.0及之前版本，Configuration中的語言至關因而App的全局設置：android
1 public static void changeAppLanguage(Context context, String newLanguage){ 2 Resources resources = context.getResources(); 3 Configuration configuration = resources.getConfiguration(); 4 5 // app locale 6 Locale locale = getLocaleByLanguage(newLanguage); 7 8 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { 9 configuration.setLocale(locale); 10 } else { 11 configuration.locale = locale; 12 } 13 14 // updateConfiguration 15 DisplayMetrics dm = resources.getDisplayMetrics(); 16 resources.updateConfiguration(configuration, dm); 17 }
而後在繼承application的類中調用便可：git
1 public class App extends Application { 2 3 @Override 4 public void onCreate() { 5 super.onCreate(); 6 onLanguageChange(); 7 } 8 9 /** 10 * Handling Configuration Changes 11 * @param newConfig newConfig 12 */ 13 @Override 14 public void onConfigurationChanged(Configuration newConfig) { 15 super.onConfigurationChanged(newConfig); 16 onLanguageChange(); 17 } 18 19 private void onLanguageChange() { 20 String language;//讀取App配置 21 AppLanguageUtils.changeAppLanguage(this, language); 22 } 23 }
Android7.0及以後版本，使用了LocaleList，Configuration中的語言設置可能獲取的不一樣，而是生效於各自的Context。github
這會致使：Android7.0使用就的方式，有些Activity可能會顯示爲手機的系統語言。app
Android7.0 優化了對多語言的支持，廢棄了updateConfiguration()方法，替代方法：createConfigurationContext(), 而返回的是Context。
ide
也就是語言須要植入到Context中，每一個Context都植入一遍。工具
GitHub地址
轉自：https://yanlu.me/android-7-0-app-language-switch/ui
我本身的使用方式以下：this
1.建立工具類spa
1 public class AppLanguageUtils { 2 3 public static HashMap<String, Locale> mAllLanguages = new HashMap<String, Locale>(8) {{ 4 put(Constants.ENGLISH, Locale.ENGLISH); 5 put(Constants.CHINESE, Locale.SIMPLIFIED_CHINESE); 6 put(Constants.SIMPLIFIED_CHINESE, Locale.SIMPLIFIED_CHINESE); 7 put(Constants.TRADITIONAL_CHINESE, Locale.TRADITIONAL_CHINESE); 8 put(Constants.FRANCE, Locale.FRANCE); 9 put(Constants.GERMAN, Locale.GERMANY); 10 put(Constants.HINDI, new Locale(Constants.HINDI, "IN")); 11 put(Constants.ITALIAN, Locale.ITALY); 12 }}; 13 14 @SuppressWarnings("deprecation") 15 public static void changeAppLanguage(Context context, String newLanguage) { 16 Resources resources = context.getResources(); 17 Configuration configuration = resources.getConfiguration(); 18 19 // app locale 20 Locale locale = getLocaleByLanguage(newLanguage); 21 22 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { 23 configuration.setLocale(locale); 24 } else { 25 configuration.locale = locale; 26 } 27 28 // updateConfiguration 29 DisplayMetrics dm = resources.getDisplayMetrics(); 30 resources.updateConfiguration(configuration, dm); 31 } 32 33 34 private static boolean isSupportLanguage(String language) { 35 return mAllLanguages.containsKey(language); 36 } 37 38 public static String getSupportLanguage(String language) { 39 if (isSupportLanguage(language)) { 40 return language; 41 } 42 43 if (null == language) {//爲空則表示首次安裝或未選擇過語言，獲取系統默認語言 44 Locale locale = Locale.getDefault(); 45 for (String key : mAllLanguages.keySet()) { 46 if (TextUtils.equals(mAllLanguages.get(key).getLanguage(), locale.getLanguage())) { 47 return locale.getLanguage(); 48 } 49 } 50 } 51 return Constants.ENGLISH; 52 } 53 54 /** 55 * 獲取指定語言的locale信息，若是指定語言不存在{@link #mAllLanguages}，返回本機語言，若是本機語言不是語言集合中的一種{@link #mAllLanguages}，返回英語 56 * 57 * @param language language 58 * @return 59 */ 60 public static Locale getLocaleByLanguage(String language) { 61 if (isSupportLanguage(language)) { 62 return mAllLanguages.get(language); 63 } else { 64 Locale locale = Locale.getDefault(); 65 for (String key : mAllLanguages.keySet()) { 66 if (TextUtils.equals(mAllLanguages.get(key).getLanguage(), locale.getLanguage())) { 67 return locale; 68 } 69 } 70 } 71 return Locale.ENGLISH; 72 } 73 74 75 public static Context attachBaseContext(Context context, String language) { 76 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { 77 return updateResources(context, language); 78 } else { 79 return context; 80 } 81 } 82 83 84 @TargetApi(Build.VERSION_CODES.N) 85 private static Context updateResources(Context context, String language) { 86 Resources resources = context.getResources(); 87 Locale locale = AppLanguageUtils.getLocaleByLanguage(language); 88 89 Configuration configuration = resources.getConfiguration(); 90 configuration.setLocale(locale); 91 configuration.setLocales(new LocaleList(locale)); 92 return context.createConfigurationContext(configuration); 93 } 94 95 }
2.在繼承application的類中重寫attachBaseContext()方法等操做
1 private static Context sContext; 2 private String language; 3 4 @Override 5 protected void attachBaseContext(Context base) { 6 super.attachBaseContext(AppLanguageUtils.attachBaseContext(base, getAppLanguage(base))); 7 } 8 9 @Override 10 public void onCreate() { 11 super.onCreate(); 12 sContext = this; 13 spu = new SharedPreferencesUtil(getApplicationContext()); 14 language = spu.getString("language"); 15 onLanguageChange(); 16 } 17 18 public static Context getContext() { 19 return sContext; 20 } 21 22 /** 23 * Handling Configuration Changes 24 * @param newConfig newConfig 25 */ 26 @Override 27 public void onConfigurationChanged(Configuration newConfig) { 28 super.onConfigurationChanged(newConfig); 29 onLanguageChange(); 30 } 31 32 private void onLanguageChange() { 33 // AppLanguageUtils.changeAppLanguage(this, AppLanguageUtils.getSupportLanguage(getAppLanguage(this))); 34 AppLanguageUtils.changeAppLanguage(this, AppLanguageUtils.getSupportLanguage(language)); 35 } 36 37 private String getAppLanguage(Context context) { 38 String appLang = PreferenceManager.getDefaultSharedPreferences(context) 39 .getString("language", Constants.ENGLISH); 40 return appLang ; 41 }
3.在須要切換語言的SetLanguageActivity中設置切換方法
private void onChangeAppLanguage(String newLanguage) { spu.putString("language", newLanguage); AppLanguageUtils.changeAppLanguage(this, newLanguage); AppLanguageUtils.changeAppLanguage(App.getContext(), newLanguage); this.recreate(); }
4.跳轉到SetLanguageActivity的原界面語言須要刷新
//攜參跳轉 startActivityForResult(new Intent(OriginActivity.this, SetLanguageActivity.class), CHANGE_LANGUAGE_REQUEST_CODE);
//切換後返回刷新 @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == CHANGE_LANGUAGE_REQUEST_CODE) { recreate(); } }
That's all.