/*change language at Run-time*/
//use method like that:
//setLocale("en");
 public void setLocale(String lang) { 
  myLocale = new Locale(lang);         
  Resources res = getResources();         
  DisplayMetrics dm = res.getDisplayMetrics();         
  Configuration conf = res.getConfiguration();         
  conf.locale = myLocale;         
  res.updateConfiguration(conf, dm);         
  Intent refresh = new Intent(this, AndroidLocalize.class);         
  startActivity(refresh); 
 }

我也面临着同样的问题。在GitHub上，我找到了Android-LocalizationActivity库。

这个库使得在运行时更改应用程序的语言变得非常简单，如下面的代码示例所示。包含下面示例代码的示例项目和更多信息可以在github页面上找到。

LocalizationActivity扩展了AppCompatActivity，所以你也可以在使用Fragments时使用它。

public class MainActivity extends LocalizationActivity implements View.OnClickListener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple);

        findViewById(R.id.btn_th).setOnClickListener(this);
        findViewById(R.id.btn_en).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        if (id == R.id.btn_en) {
            setLanguage("en");
        } else if (id == R.id.btn_th) {
            setLanguage("th");
        }
    }
}

根据这篇文章。您需要下载那篇文章中引用的LocaleHelper.java。

Create MyApplication class that will extends Application Override attachBaseContext() to update language. Register this class in manifest. public class MyApplication extends Application { @Override protected void attachBaseContext(Context base) { super.attachBaseContext(LocaleHelper.onAttach(base, "en")); } } <application android:name="com.package.MyApplication" .../> Create BaseActivity and override onAttach() to update language. Needed for Android 6+ public class BaseActivity extends Activity { @Override protected void attachBaseContext(Context base) { super.attachBaseContext(LocaleHelper.onAttach(base)); } } Make all activities on your app extends from BaseActivity. public class LocaleHelper { private static final String SELECTED_LANGUAGE = "Locale.Helper.Selected.Language"; public static Context onAttach(Context context) { String lang = getPersistedData(context, Locale.getDefault().getLanguage()); return setLocale(context, lang); } public static Context onAttach(Context context, String defaultLanguage) { String lang = getPersistedData(context, defaultLanguage); return setLocale(context, lang); } public static String getLanguage(Context context) { return getPersistedData(context, Locale.getDefault().getLanguage()); } public static Context setLocale(Context context, String language) { persist(context, language); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { return updateResources(context, language); } return updateResourcesLegacy(context, language); } private static String getPersistedData(Context context, String defaultLanguage) { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context); return preferences.getString(SELECTED_LANGUAGE, defaultLanguage); } private static void persist(Context context, String language) { SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context); SharedPreferences.Editor editor = preferences.edit(); editor.putString(SELECTED_LANGUAGE, language); editor.apply(); } @TargetApi(Build.VERSION_CODES.N) private static Context updateResources(Context context, String language) { Locale locale = new Locale(language); Locale.setDefault(locale); Configuration configuration = context.getResources().getConfiguration(); configuration.setLocale(locale); configuration.setLayoutDirection(locale); return context.createConfigurationContext(configuration); } @SuppressWarnings("deprecation") private static Context updateResourcesLegacy(Context context, String language) { Locale locale = new Locale(language); Locale.setDefault(locale); Resources resources = context.getResources(); Configuration configuration = resources.getConfiguration(); configuration.locale = locale; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { configuration.setLayoutDirection(locale); } resources.updateConfiguration(configuration, resources.getDisplayMetrics()); return context; } }

/*change language at Run-time*/
//use method like that:
//setLocale("en");
 public void setLocale(String lang) { 
  myLocale = new Locale(lang);         
  Resources res = getResources();         
  DisplayMetrics dm = res.getDisplayMetrics();         
  Configuration conf = res.getConfiguration();         
  conf.locale = myLocale;         
  res.updateConfiguration(conf, dm);         
  Intent refresh = new Intent(this, AndroidLocalize.class);         
  startActivity(refresh); 
 }

如果你写

android:configChanges="locale"

在每个活动中(在清单文件中)，那么不需要每次输入activity时都设置它。

您可以要求用户在第一个屏幕中选择语言并将其保存在SharedPreferences中

SharedPreferences.Editor editor = getSharedPreferences("data", MODE_PRIVATE).edit();
editor.putString("lang", "si");
editor.apply();
    
recreate();

然后你可以在应用程序中的每个Activity中使用它。这里我设置了英语和僧伽罗语。

@Override
protected void attachBaseContext(Context base) {
    SharedPreferences prefs = base.getSharedPreferences("uinfo", MODE_PRIVATE);
    String restoredText = prefs.getString("lang", "No name defined");

    if (restoredText.equals("si")){
        super.attachBaseContext(LocaleHelper.localeUpdateResources(base, "si"));
    }else{
        super.attachBaseContext(LocaleHelper.localeUpdateResources(base, "en"));
    }
}

这是你的localUpdateResources方法。把它放在LocalHelper类中

public class LocaleHelper {
    public static Context localeUpdateResources(Context context, String languageCode) {

        Context newContext = context;

        Locale locale = new Locale(languageCode);
        Locale.setDefault(locale);

        Resources resources = context.getResources();
        Configuration config = new Configuration(resources.getConfiguration());

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {

            config.setLocale(locale);
            newContext = context.createConfigurationContext(config);

        } else {

            config.locale = locale;
            resources.updateConfiguration(config, resources.getDisplayMetrics());
        }

        return newContext;

    }
}