Android11 修改系统语言

1.定义一个view

<RelativeLayoutandroid:id="@+id/rlChooseLanguage"style="@style/SettingAboutItem"><TextViewstyle="@style/SettingAboutItemTextView"android:text="@string/choose_language" /><ImageView style="@style/SettingAboutArrowImageView" /></RelativeLayout>

2.java代码中给该view设置点击事件

private void showChooseLanguageDialog() {final String[] languages = {getString(R.string.language_chinese), getString(R.string.language_english)};AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());builder.setTitle(getString(R.string.choose_language)).setSingleChoiceItems(languages, getCurrentLanguageIndex(), (dialog, which) -> {final String selectedLanguage = languages[which].equals(getString(R.string.language_chinese)) ? "zh" : "en";dialog.dismiss();ToastUtil.show(getString(R.string.language_waitting));if (!selectedLanguage.equals(getCurrentLanguage())) {mHandler.postDelayed(new Runnable() {@Overridepublic void run() {changeAppLanguage(selectedLanguage);restartApp();}}, 500);}}).show();}

private String getCurrentLanguage() {Locale currentLocale = getResources().getConfiguration().locale;return currentLocale.getLanguage();}private int getCurrentLanguageIndex() {if (getCurrentLanguage().equals("zh")) {return 0;} else if (getCurrentLanguage().equals("en")) {return 1;}return 0;}

<string name="choose_language">选择语言</string><string name="language_chinese">中文</string><string name="language_english">英文</string><string name="language_waitting">修改配置中，请稍候...</string>

3.使用反射，调用修改语言功能

//设置语言，使用反射public void changeAppLanguage(String languageCode) {Locale locale = new Locale(languageCode);try {Class localPicker = Class.forName("com.android.internal.app.LocalePicker");Method updateLocale = localPicker.getDeclaredMethod("updateLocale",Locale.class);updateLocale.invoke(null, locale);} catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException| IllegalAccessException e) {e.printStackTrace();}}

4.如果设备直接修改Locale信息无效，且使用反射也无效，可以直接跳转到系统设置页面，引导用户修改语言

Intent intent = new Intent(Settings.ACTION_LOCALE_SETTINGS);startActivity(intent);

5.重启app代码

private void restartApp() {Intent intent = MyApplication.getInstance().getPackageManager().getLaunchIntentForPackage(MyApplication.getInstance().getPackageName());intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);startActivity(intent);System.exit(0); // 强制退出当前进程}