防止在 Android 屏幕旋转时关闭对话框 [英] Prevent dialog dismissal on screen rotation in Android
问题描述
我试图防止在 Activity 重新启动时关闭使用警报构建器构建的对话框.
I am trying to prevent dialogs built with Alert builder from being dismissed when the Activity is restarted.
如果我重载 onConfigurationChanged 方法，我可以成功地做到这一点并将布局重置为正确的方向，但我失去了edittext的粘性文本功能.因此，在解决对话框问题时，我创建了这个 edittext 问题.
If I overload the onConfigurationChanged method I can successfully do this and reset the layout to correct orientation but I lose sticky text feature of edittext. So in solving the dialog problem I have created this edittext problem.
如果我从编辑文本中保存字符串并在 onCofiguration 更改中重新分配它们，它们似乎仍然默认为初始值，而不是在旋转之前输入的值.即使我强制无效似乎也会更新它们.
If I save the strings from the edittext and reassign them in the onCofiguration change they still seem to default to initial value not what was entered before rotation. Even if I force an invalidate does seem to update them.
我真的需要解决对话框问题或编辑文本问题.
I really need to solve either the dialog problem or the edittext problem.
感谢您的帮助.
推荐答案
如今避免此问题的最佳方法是使用 DialogFragment.
The best way to avoid this problem nowadays is by using a DialogFragment.
创建一个扩展 DialogFragment.覆盖 onCreateDialog 并返回旧的 Dialog 或 AlertDialog.
Create a new class which extends DialogFragment. Override onCreateDialog and return your old Dialog or an AlertDialog.
然后你可以用 DialogFragment.show(fragmentManager, tag).
Then you can show it with DialogFragment.show(fragmentManager, tag).
这是一个带有 Listener:
Here's an example with a Listener:
public class MyDialogFragment extends DialogFragment {
public interface YesNoListener {
void onYes();
void onNo();
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
if (!(activity instanceof YesNoListener)) {
throw new ClassCastException(activity.toString() + " must implement YesNoListener");
}
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
return new AlertDialog.Builder(getActivity())
.setTitle(R.string.dialog_my_title)
.setMessage(R.string.dialog_my_message)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
((YesNoListener) getActivity()).onYes();
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
((YesNoListener) getActivity()).onNo();
}
})
.create();
}
}
在您调用的 Activity 中:
And in the Activity you call:
new MyDialogFragment().show(getSupportFragmentManager(), "tag"); // or getFragmentManager() in API 11+
这个答案有助于解释其他三个问题(及其答案):
This answer helps explain these other three questions (and their answers):
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