(编辑)
我使用了一个区域设置更改解决方案来更改我的应用程序的语言,但它在oreo中不起作用。它完全适用于我的三星S4,但不适用于我的S9。
所以我正在进行这样的语言环境更改:
public void initAppLanguages(Context context, String lang){
PreferenceUtil.setSelectedLanguageId(lang);
LocaleUtils.setLocale(context, lang );
MyApplication.reouvrir=1;
Intent i = getBaseContext().getPackageManager().getLaunchIntentForPackage(getBaseContext().getPackageName());
this.finishAffinity();
finish();
startActivity(i);
}
我的LocaleUtils类:
public class LocaleUtils {
@Retention(RetentionPolicy.SOURCE)
@StringDef({ENGLISH, FRENCH, SPANISH})
public @interface LocaleDef {
String[] SUPPORTED_LOCALES = {ENGLISH, FRENCH, SPANISH};
}
public static final String ENGLISH = "en";
public static final String FRENCH = "fr";
public static final String SPANISH = "es";
public static void initialize(Context context) {
setLocale(context, ENGLISH);
}
public static void initialize(Context context, @LocaleDef String defaultLanguage) {
setLocale(context, defaultLanguage);
}
public static boolean setLocale(Context context, @LocaleDef String language) {
return updateResources(context, language);
}
private static boolean updateResources(Context context, String language) {
Locale locale = new Locale(language);
Locale.setDefault(locale);
Resources resources = context.getResources();
Configuration configuration = resources.getConfiguration();
context.createConfigurationContext(configuration);
configuration.locale = locale;
resources.updateConfiguration(configuration, resources.getDisplayMetrics());
return true;
}
}
我的PreferenceUtil类:
public class PreferenceUtil {
private static SharedPreferences getDefaultSharedPreference(Context context) {
if (PreferenceManager.getDefaultSharedPreferences(MyApplication.getInstance().getApplicationContext()) != null)
return PreferenceManager.getDefaultSharedPreferences(MyApplication.getInstance().getApplicationContext());
else
return null;
}
public static void setSelectedLanguageId(String id){
final SharedPreferences prefs = getDefaultSharedPreference(MyApplication.getInstance().getApplicationContext());
SharedPreferences.Editor editor = prefs.edit();
editor.putString("app_language_id", id);
editor.apply();
}
public static String getSelectedLanguageId(){
return getDefaultSharedPreference(MyApplication.getInstance().getApplicationContext())
.getString("app_language_id", "en");
}
}
这样的子活动中的语言环境会发生变化:
MyApplication.initAppLanguage(mContext);
我做错了什么?为什么它不在奥利奥工作?
答案 0 :(得分:2)
请按照以下步骤操作:
注意:我假设您在values文件夹中为不同的英语,西班牙语和法语创建了不同的字符串文件。 (即每个values-en,values-es,res目录中的values-fr文件夹中的strings.xml文件)
添加此文件: LocaleHelper.java
package com.test;
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.os.LocaleList;
import android.preference.PreferenceManager;
import java.util.Locale;
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);
Configuration configuration = context.getResources().getConfiguration();
LocaleList localeList = new LocaleList(locale);
localeList.setDefault(localeList);
configuration.setLocales(localeList);
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;
resources.updateConfiguration(configuration, resources.getDisplayMetrics());
return context;
}
}
添加文件: LanguageUtil.java
package com.test;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.util.DisplayMetrics;
import android.util.Log;
import java.util.Locale;
public class LanguageUtil {
public static void changeLanguageType(Context context, Locale localelanguage) {
Log.i("=======", "context = " + context);
Resources resources = context.getResources();
DisplayMetrics dm = resources.getDisplayMetrics();
Configuration config = resources.getConfiguration();
// Application user selects language
// reference https://developer.android.com/reference/android/content/res/Configuration.html
if (VersionUtils.isAfter24()) {
config.setLocale(localelanguage);
} else {
config.locale = localelanguage;
resources.updateConfiguration(config, dm);
}
}
public static Locale getLanguageType(Context context) {
Log.i("=======", "context = " + context);
Resources resources = context.getResources();
Configuration config = resources.getConfiguration();
// Application user selects language
if (VersionUtils.isAfter24()) {
return config.getLocales().get(0);
} else {
return config.locale;
}
}
}
添加文件: MyContextWrapper.java
package com.test;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Build;
import android.os.LocaleList;
import java.util.Locale;
public class MyContextWrapper extends ContextWrapper {
public MyContextWrapper(Context base) {
super(base);
}
@TargetApi(Build.VERSION_CODES.N)
public static ContextWrapper wrap(Context context, Locale newLocale) {
Resources res = context.getResources();
Configuration configuration = res.getConfiguration();
if (VersionUtils.isAfter24()) {
configuration.setLocale(newLocale);
LocaleList localeList = new LocaleList(newLocale);
LocaleList.setDefault(localeList);
configuration.setLocales(localeList);
context = context.createConfigurationContext(configuration);
} else if (VersionUtils.isAfter17()) {
configuration.setLocale(newLocale);
context = context.createConfigurationContext(configuration);
} else {
configuration.locale = newLocale;
res.updateConfiguration(configuration, res.getDisplayMetrics());
}
return new ContextWrapper(context);
}
}
添加文件: VersionUtils.java
package com.test;
import android.os.Build;
import android.support.annotation.RequiresApi;
public final class VersionUtils {
@RequiresApi(Build.VERSION_CODES.N_MR1)
public static boolean isAfter25() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1;
}
@RequiresApi(Build.VERSION_CODES.N)
public static boolean isAfter24() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.N;
}
public static boolean isAfter23() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.M;
}
public static boolean isAfter22() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP_MR1;
}
public static boolean isAfter21() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
}
public static boolean isAfter20() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH;
}
public static boolean isAfter19() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
}
public static boolean isAfter18() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2;
}
public static boolean isAfter17() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1;
}
public static boolean isAfter16() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
}
public static boolean isAfter14() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
}
public static boolean isAfter13() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2;
}
public static boolean isAfter11() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
}
public static boolean isAfter9() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
}
public static boolean isAfter8() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
}
public static boolean isAfter5() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR;
}
}
现在创建Prefs文件: Prefs.kt (这是Kotlin类文件) 注意:您可以使用自己的首选项创建和重新生成代码。
package com.test
import android.content.Context
import android.content.SharedPreferences
import android.content.SharedPreferences.Editor
class Prefs private constructor(private val context: Context) {
private val prefranceName = "testPrefs"
companion object {
private fun getPrefs(context: Context): SharedPreferences {
return context.getSharedPreferences(context.packageName, 0)
}
fun clearDefaultShared(key: String, context: Context) {
val e = getPrefs(context).edit()
e.remove(key)
e.apply()
}
fun setString(key: String, sunDefult: String, context: Context) {
val e = getPrefs(context).edit()
e.putString(key, sunDefult)
e.apply()
}
fun getString(key: String, sunDefult: String, context: Context): String? {
return getPrefs(context).getString(key, sunDefult)
}
fun clearAll(context: Context) {
val editor = getPrefs(context).edit()
editor.clear()
editor.commit()
}
}
}
现在创建一个扩展Application类的TestApp类。 这将用于保存应用重新启动时要应用的上一个选定语言。 注意:请不要忘记将此应用类名“TestApp”添加到标记中的AndroidManifest.xml。
添加文件: TestApp.kt
package com.test
import android.app.Application
import com.test.LanguageUtil
import com.test.Prefs
import java.util.*
class TestApp : Application() {
override fun onCreate() {
super.onCreate()
dbAdapter = DBAdapter(applicationContext)
dbAdapter.openDataBase()
// Set Language Because Local will not be saved every time the app restarts after it is completely logged out
var languageType = Prefs.getString("languageType", "en", this@TestApp).toString()
if (languageType == "fr") {
LanguageUtil.changeLanguageType(this, Locale.FRENCH)
} else if (languageType == "es") {
LanguageUtil.changeLanguageType(this, Locale("es",""))
} else {
LanguageUtil.changeLanguageType(this, Locale.ENGLISH)
}
}
}
现在,在每个活动中,添加以下代码以应用更改后的语言。
这是Kotlin代码:
override fun attachBaseContext(newBase: Context) {
var languageType = Prefs.getString("languageType", "en", newBase).toString()
super.attachBaseContext(MyContextWrapper.wrap(newBase, Locale(languageType, "")))
}
选择其他语言时,请使用以下代码:
LanguageUtil.changeLanguageType(this@MainActivity, Locale.ENGLISH) // for englsih
LanguageUtil.changeLanguageType(this@MainActivity, Locale("es","")) // for spanish
LanguageUtil.changeLanguageType(this@MainActivity, Locale.FRENCH)// for french
之后也将其存储在共享偏好中。
请记住:如果您更改当前活动中的语言,并且您将看不到其中的语言更改,因为您需要重新启动活动以查看更改,但在此当前活动之后打开活动,您将看到更改。
如果在同一个活动中调用recreate(),它将使屏幕闪烁,因此不要使用recreate()函数。
我有一个解决方案(不是正确的解决方案,但我可以说它是补丁,它是完美的)。 要显示当前活动的更改,您需要在默认strings.xml中创建所有英语,西班牙语和法语字符串,并在用户选择其他语言时将其设置为当前活动中的运行时。
答案 1 :(得分:0)
设置新区域设置后开始您的活动。这对我有用。
private void restartActivity() {
Intent intent = getIntent();
finish();
startActivity(intent);
}
您可以看到完整的答案here