我想添加一个使用共享首选项更改应用程序语言的选项。我在共享偏好设置中保存了“en”或“fa”等语言。
现在我需要将共享首选项数据设置为语言。我尝试使用This code但我遇到了一些问题。
为了使用这段代码,我应该用以下内容包装我的活动:
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(MyContextWrapper.wrap(newBase,languageFromPrefs));
}
我编写了一种方法,用于从共享首选项中获取名为getString(Context context,String key,String defaultValue)
的语言,然后将该代码编辑为:
@Override
protected void attachBaseContext(Context newBase) {
lang = App.Prefs.getString(newBase, App.Prefs.LANGUAGE_KEY,"fa");
super.attachBaseContext(MyContextWrapper.wrap(newBase,lang));
}
看起来不错但是当我运行我的应用程序时,我看到了一个奇怪的场景。首次运行时,app语言为fa(波斯语),下次自动更改为en(英语)!
[注意:设备语言目前是英文]
这是我的主要活动:
(我评论了与我的问题无关的代码)
public class MainActivity extends AppCompatActivity {
EditText userText;
Button embellishBtn;
ImageView settings;
String lang;
@Override
protected void attachBaseContext(Context newBase) {
lang = App.Prefs.getString(newBase, App.Prefs.LANGUAGE_KEY,"fa");
super.attachBaseContext(App.wrap(newBase,lang));
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/*
userText = (EditText) findViewById(R.id.textBox);
embellishBtn = (Button) findViewById(R.id.embellishButton);
settings = (ImageView) findViewById(R.id.settings);
App.SetFont.EditText(userText,this);
App.SetFont.Button(embellishBtn,this);
settings.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
Toast.makeText(getBaseContext(),getString(R.string.settings),Toast.LENGTH_SHORT).show();
return true;
}
});
MarginActivity.isFirstRateMessage = true;
Boolean isFirstOpen = App.Prefs.getBoolean(this, App.Prefs.FIRST_OPEN_KEY,true);
if (isFirstOpen && TimeZone.getDefault().getDisplayName().toLowerCase().equals("iran standard time"))
{
App.Prefs.setString(this, App.Prefs.LANGUAGE_KEY,"fa");
App.Prefs.setBoolean(this,App.Prefs.FIRST_OPEN_KEY,false);
startActivity(new Intent(this, MainActivity.class));
finish();
}
*/
}
/*
public void onSettingsClick(View view)
{
startActivity(new Intent(this, SettingsActivity.class));
}
public void onEmbellishClick(View view)
{
if(userText.getText().toString().trim().length() > 0)
{
Intent intent = new Intent(this,EmbellishActivity.class);
intent.putExtra("user_text",userText.getText().toString() + " ");
startActivity(intent);
}
else
{
Animation shake = AnimationUtils.loadAnimation(this,R.anim.focus_zoom);
userText.startAnimation(shake);
}
userText.setText(null);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("user_text",userText.getText().toString());
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
userText.setText(savedInstanceState.getString("user_text"));
}
*/
}
和getString方法(App.Prefs.getString()
):
static String getString(Context context,String key,String defaultValue)
{
SharedPreferences shared = context.getSharedPreferences("Prefs", MODE_PRIVATE);
return shared.getString(key, defaultValue);
}
我的应用程序运行没有任何错误。 我应该怎么做才能解决这个问题?怎么了?
答案 0 :(得分:0)
您必须在运行时使用这种方式更改语言
SharedPreferences LanguagePreference = getSharedPreferences("SelectedLanguage", 0);
String languageToLoad = LanguagePreference.getString("Language", null);
Locale locale =null;
if(languageToLoad!=null && languageToLoad.equals("english"))
locale =new Locale("en", "US");
else if(languageToLoad!=null && languageToLoad.equals("tamil"))
locale =new Locale("ta", "IN");
else
locale =new Locale("en", "US");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.setLocale(locale);
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
答案 1 :(得分:0)
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(MyContextWrapper.wrap
(newBase,languageFromPrefs));
}
这应该在基础活动中完成,基础活动由项目中的每个活动扩展。