android语言环境更改方向更改 [英] android locale change in orientation change
问题描述
在我的应用程序中，我有两个活动，一个可以向两侧旋转，另一个被锁定为横向模式.
in my app i am having two activities one is rotatable to both sides and other is locked in landscape mode.
以下是我在清单文件中添加了活动的详细信息
Following is my manifest file details where the activities been added
<activity
android:name="com.hogaming.android.Activities.LoginActivity"
android:configChanges="orientation|screenSize|keyboardHidden">
</activity>
<activity
android:name="com.android.activities.MainActivity"
android:configChanges="orientation|screenSize|keyboardHidden">
</activity>
在使用微调框的登录活动中，我正在更改语言环境并更新整个编辑文本和按钮文本. 在单击按钮的操作中，我正在更新UI视图，而当我旋转设备时，将在更新的视图上设置英语语言环境 这是我的完整代码
in my login activity using a spinner i am changing the locale and updating entire edit texts and buttons text. In a button click action i am updating the UI views and that time when i rotate the device, the English locale is set on views which are updated Here is my entire code
public class LoginActivity extends Activity
{
Locale locale = null;
Spinner langSpinner;
private SharedPreferences langPrefs;
String langSelected = "";
int langPosition = 0;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.loginscreen);
langPrefs = PreferenceManager.getDefaultSharedPreferences(this);
langSelected = langPrefs.getString(langPrefKey, "");
langPosition = langPrefs.getInt(langPosKey, 0);
langSpinner = (Spinner)this.findViewById(R.id.lanuage_spinner1);
langSpinner.setSelection(langPosition);
langSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int pos, long arg3)
{
if (pos == 0)
{
langSelected ="en";
locale = Locale.ENGLISH;
}
else if (pos == 1)
{
langSelected ="it";
locale = Locale.ITALIAN;
}
else if (pos == 2)
{
langSelected ="zh";
locale = Locale.SIMPLIFIED_CHINESE;
}
else if (pos == 3)
{
langSelected ="zh-rTW";
locale = Locale.TRADITIONAL_CHINESE;
}
changeLang(langSelected, pos);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
btnLogin = (Button) this.findViewById(R.id.LoginButton);
btnLogin.setOnClickListener(new ButtonClickListener());
}
@Override
protected void onStart() {
super.onStart();
}
@Override
protected void onStop() {
super.onStop();
this.finish();
}
@Override
protected void onDestroy()
{
super.onDestroy();
this.finish();
}
public class ButtonClickListener implements OnClickListener {
public void onClick(View v) {
final LoginTask validateTask = new LoginTask(context, usernameField.getText().toString(), passwordField.getText().toString());
validateTask.execute();
}
// Hide the keyboard
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(passwordField.getWindowToken(), 0);
}
public class LoginTask extends AsyncTask<Void, Void, String>
{
protected LoginActivity context;
protected Exception exception;
private String username;
private String password;
public LoginTask(LoginActivity context, String uname, String pwd) {
this.context = context;
this.username = uname;
this.password = pwd;
}
@Override
protected String doInBackground(Void... params) {
try
{
return HTTPHelper.LoginTaskData(this.context, username, password);
}
catch (Exception e)
{
exception = e;
Log.e(TAG, "Login Task Error", e);
}
return null;
}
@Override
protected void onPostExecute(String result)
{
super.onPostExecute(result);
Log.e(TAG, "LoginTask: " + result);
if (result.equals("true"))
{
// moves to next activity
}
else if (result.equals("false"))
{
//showing an alert textview with selected language text
}
}
}
public void changeLang(String lang, int pos)
{
if (lang.length() != 0)
{
saveLocale(lang, pos, locale);
android.content.res.Configuration config = new android.content.res.Configuration();
config.locale = locale;
Locale.setDefault(locale);
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
updateTexts();
}
}
public void saveLocale(String lang, int pos, Locale locale)
{
SharedPreferences.Editor editor1 = langPrefs.edit();
editor1.remove(langPrefKey);
editor1.remove(langPosKey);
editor1.commit();
SharedPreferences.Editor editor = langPrefs.edit();
editor.putString(langPrefKey, lang);
editor.putInt(langPosKey, pos);
editor.commit();
langSelected = langPrefs.getString(langPrefKey, "");
langPosition = langPrefs.getInt(langPosKey, 0);
}
private void updateTexts()
{
// here i will once again set all textview String values, it changes to the selected language
}
@Override
public void onConfigurationChanged(android.content.res.Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
if (locale != null){
newConfig.locale = locale;
Locale.setDefault(locale);
getBaseContext().getResources().updateConfiguration(newConfig, getBaseContext().getResources().getDisplayMetrics());
}
}
}
推荐答案
如果我对您的理解是正确的，那么问题是，即使您的android:configChanges，让android在方向更改时重新启动Activity来完成其工作.然后，我将使用对onSaveInstanceState进行保存，并保存Locale用户在Spinner中选择的用户.再次调用onCreate时，并且由于捆绑包不为null而导致方向更改而导致调用时，请读取存储的Locale并重新启动，然后再次更新配置.例如
If I understood you correctly, the issue is that the phone's locale is restored when you switch the screen orientation, despite you have android:configChanges="orientation|screenSize|keyboardHidden", in your AndroidManifest.xml. If I were in you I would approach the issue from a different perspective. I would get rid of the android:configChanges, letting android do its job restarting the Activity, when the orientation changes. I would then use the pair onSaveInstanceState, to save and the Locale the user selected in the Spinner. When onCreate is called again, and you know is called due to the orientation change because the bundle is not null, read the Locale stored and restart, and update the configuration again. E.g.
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
savedInstanceState.putSerializable("LOCALE", locale);
super.onSaveInstanceState(savedInstanceState);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loginscreen);
if (savedInstanceState != null) {
locale = (Locale) savedInstanceState.getSerializable("LOCALE");
if (locale != null) {
// update the configuration
}
}
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