android - DialogFragment 崩溃中的 setRetainInstance

Question

我有一个 DialogFragment 附加到 Activity，当屏幕旋转时，Activity 被销毁，DialogFragment 也被销毁，我想保留 DialogFragment 和我的DialogFragment 代码如下，我加了setRetainInstance(true);会崩溃

@Override
public void onCreate(Bundle savedInstanceState) {
    Log.d(sClassTag, "onCreate");
    super.onCreate(savedInstanceState);
    setRetainInstance(true);
    int style = DialogFragment.STYLE_NORMAL, theme = 0;
    setStyle(style, theme);

}
 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    Log.d(sClassTag, "onCreateView");
    if(mView==null){
        mView = inflater.inflate(R.layout.layout_password,container,false);
    }
    addButtonListener();
    addEdittextListener();
    return mView;
}

我在这里获取崩溃日志

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.microsoft.pdfviewertestapplication/com.microsoft.pdfviewertestapplication.MainActivity}: java.lang.IllegalStateException: DialogFragment can not be attached to a container view
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4077)
at android.app.ActivityThread.-wrap15(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1350)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5422)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

Answer 1

您的 Activity 是否扩展了 FragmentActivity 并且您是否在 Manifest 文件中为 Activity 设置了 configChanges？

将父 Activity 作为 FragmentActivity 并将 fragment 膨胀为

DialogFragment newFragment = new Diafragment();
newFragment.show(getSupportFragmentManager(), "dialog");