是否有可能在使用Android资源的同时以编程方式改变应用程序的语言?
如果不是，是否可以用特定的语言请求资源?
我想让用户改变应用程序的语言从应用程序。
当前回答
这里列出的解决方案没有一个对我有用。
如果AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)，语言没有在android >= 7.0上切换
这个LocaleUtils工作得很好: https://gist.github.com/GigigoGreenLabs/7d555c762ba2d3a810fe
LocaleUtils
public class LocaleUtils {
public static final String LAN_SPANISH = "es";
public static final String LAN_PORTUGUESE = "pt";
public static final String LAN_ENGLISH = "en";
private static Locale sLocale;
public static void setLocale(Locale locale) {
sLocale = locale;
if(sLocale != null) {
Locale.setDefault(sLocale);
}
}
public static void updateConfig(ContextThemeWrapper wrapper) {
if(sLocale != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
Configuration configuration = new Configuration();
configuration.setLocale(sLocale);
wrapper.applyOverrideConfiguration(configuration);
}
}
public static void updateConfig(Application app, Configuration configuration) {
if(sLocale != null && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
//Wrapping the configuration to avoid Activity endless loop
Configuration config = new Configuration(configuration);
config.locale = sLocale;
Resources res = app.getBaseContext().getResources();
res.updateConfiguration(config, res.getDisplayMetrics());
}
}
}
将此代码添加到应用程序
public class App extends Application {
public void onCreate(){
super.onCreate();
LocaleUtils.setLocale(new Locale("iw"));
LocaleUtils.updateConfig(this, getBaseContext().getResources().getConfiguration());
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
LocaleUtils.updateConfig(this, newConfig);
}
}
活动中的代码
public class BaseActivity extends AppCompatActivity {
public BaseActivity() {
LocaleUtils.updateConfig(this);
}
}
其他回答
/*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);
}
Locale locale = new Locale("en");
Locale.setDefault(locale);
Configuration config = context.getResources().getConfiguration();
config.setLocale(locale);
context.createConfigurationContext(config);
重要更新:
context.getResources().updateConfiguration(config, context.getResources().getDisplayMetrics());
注意，在SDK >= 21上，你需要调用' resources . updateconfiguration()'，否则资源将不会被更新。
这段代码真的可以工作:
fa = 波斯语，en = 英语
注意:语言代码不能有“-”，必须是2个小写字母
在languageToLoad变量中输入您的语言代码:
import android.app.Activity;
import android.content.res.Configuration;
import android.os.Bundle;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String languageToLoad = "fa"; // your language
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
this.setContentView(R.layout.main);
}
}
2021年6月更新(Kotlin):
class Main : Activity() {
// Called when the activity is first created.
public override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
val config = resources.configuration
val lang = "fa" // your language code
val locale = Locale(lang)
Locale.setDefault(locale)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
config.setLocale(locale)
else
config.locale = locale
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
createConfigurationContext(config)
resources.updateConfiguration(config, resources.displayMetrics)
this.setContentView(R.layout.main)
}
}
我知道现在回答有点晚了，但我在这里找到了这篇文章 ． 它很好地解释了整个过程，并为您提供了结构良好的代码。
Locale Helper类:
import android.annotation.TargetApi;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Build;
import android.preference.PreferenceManager;
import java.util.Locale;
/**
* This class is used to change your application locale and persist this change for the next time
* that your app is going to be used.
* <p/>
* You can also change the locale of your application on the fly by using the setLocale method.
* <p/>
* Created by gunhansancar on 07/10/15.
*/
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;
}
}
您需要重写attachBaseContext并调用LocaleHelper.onAttach()来初始化应用程序中的语言环境设置。
import android.app.Application;
import android.content.Context;
import com.gunhansancar.changelanguageexample.helper.LocaleHelper;
public class MainApplication extends Application {
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(LocaleHelper.onAttach(base, "en"));
}
}
你所要做的就是相加
LocaleHelper.onCreate(this, "en");
只要你想改变locale。
添加LocaleHelper类
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;
}
}
在活动或片段中
Context context = LocaleHelper.setLocale(this, App.getSharedPre().getLanguage());
Resource resources = context.getResources();
现在在每个文本上设置文本
TextView tv = findViewById(R.id.tv);
tv.setText(resources.getString(R.string.tv));
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