Question

我正在关注位于Activity的Android Youtube Api（ListVideos）。我正在Fragment中尝试此操作，而我正在尝试致命The specified child already has a parent. You must call removeView() on the child's parent first.我经历了其他人发布的一些答案。它无法帮助我。谁能告诉我在哪里删除视图？

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.video_list_demo, container, true);

    listFragment = (VideoListFragment) getActivity().getFragmentManager()
            .findFragmentById(R.id.list_fragment);
    videoFragment = (VideoFragment) getActivity().getFragmentManager()
            .findFragmentById(R.id.video_fragment_container);

    videoBox = view.findViewById(R.id.video_box);
    closeButton = view.findViewById(R.id.close_button);

    videoBox.setVisibility(View.INVISIBLE);

    layout();

    return view;

}

xml：

<merge xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<fragment
    android:id="@+id/list_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.youtube.VideoListDemoActivity$VideoListFragment" />

<LinearLayout
    android:id="@+id/video_box"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom"
    android:orientation="vertical" >

    <ImageButton
        android:id="@+id/close_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:onClick="onClickClose"
        android:src="@android:drawable/btn_dialog" />

    <fragment
        android:id="@+id/video_fragment_container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        class="com.youtube.VideoListDemoActivity$VideoFragment" />
</LinearLayout>
 </merge>

布局（）：

    private void layout() {
    boolean isPortrait = getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;

    listFragment.getView().setVisibility(
            isFullscreen ? View.GONE : View.VISIBLE);
    listFragment.setLabelVisibility(isPortrait);
    closeButton.setVisibility(isPortrait ? View.VISIBLE : View.GONE);

    if (isFullscreen) {
        videoBox.setTranslationY(0); 
        setLayoutSize(videoFragment.getView(), MATCH_PARENT, MATCH_PARENT);
        setLayoutSizeAndGravity(videoBox, MATCH_PARENT, MATCH_PARENT,
                Gravity.TOP | Gravity.LEFT);
    } else if (isPortrait) {
        setLayoutSize(listFragment.getView(), MATCH_PARENT, MATCH_PARENT);
        setLayoutSize(videoFragment.getView(), MATCH_PARENT, WRAP_CONTENT);
        setLayoutSizeAndGravity(videoBox, MATCH_PARENT, WRAP_CONTENT,
                Gravity.BOTTOM);
    } else {
        videoBox.setTranslationY(0); 
        int screenWidth = dpToPx(getResources().getConfiguration().screenWidthDp);
        setLayoutSize(listFragment.getView(), screenWidth / 4, MATCH_PARENT);
        int videoWidth = screenWidth - screenWidth / 4
                - dpToPx(LANDSCAPE_VIDEO_PADDING_DP);
        setLayoutSize(videoFragment.getView(), videoWidth, WRAP_CONTENT);
        setLayoutSizeAndGravity(videoBox, videoWidth, WRAP_CONTENT,
                Gravity.RIGHT | Gravity.CENTER_VERTICAL);
    }
}

logcat的：

02-18 22:18:56.431: E/AndroidRuntime(7936): FATAL EXCEPTION: main
02-18 22:18:56.431: E/AndroidRuntime(7936): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.view.ViewGroup.addViewInner(ViewGroup.java:3389)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.view.ViewGroup.addView(ViewGroup.java:3260)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.view.ViewGroup.addView(ViewGroup.java:3205)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.view.ViewGroup.addView(ViewGroup.java:3181)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.NoSaveStateFrameLayout.wrap(NoSaveStateFrameLayout.java:40)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.os.Handler.handleCallback(Handler.java:615)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.os.Looper.loop(Looper.java:137)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at android.app.ActivityThread.main(ActivityThread.java:4895)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at java.lang.reflect.Method.invokeNative(Native Method)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at java.lang.reflect.Method.invoke(Method.java:511)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
02-18 22:18:56.431: E/AndroidRuntime(7936):     at dalvik.system.NativeStart.main(Native Method)

Answer 1

更改

inflater.inflate(R.layout.video_list_demo, container, true);

到

inflater.inflate(R.layout.video_list_demo, container, false);

并阅读文档原因*。

*您不得自行附加片段视图。你应该只归还它。并且在这种情况下你不能使用merge，因为你无法返回未附加的合并视图。 FragmentManager将决定何时附加和删除片段的视图。

致命异常：指定的孩子已经有父母

1 个答案: