Ich versuche, einen GridViewPager zu implementieren, damit ich zwischen zwei eindeutigen Ansichten wechseln kann. Bisher konnte ich noch keine Aufrufe hinzufügen. Unten ist mein Code

public class Gridder extends Activity {

private TextView mTextView;
GridViewPager gridViewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_gridder);
    final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
    final LayoutInflater inflater = getLayoutInflater();
    stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
        @Override
        public void onLayoutInflated(WatchViewStub stub) {
            gridViewPager = (GridViewPager) findViewById(R.id.pager);
            gridViewPager.setAdapter(new MyGridViewPagerAdapter());
            gridViewPager.addView(inflater.inflate(R.layout.selector_generic, stub));;
        }
    });
}

private class MyGridViewPagerAdapter extends GridPagerAdapter {
    @Override
    protected void destroyItem(ViewGroup arg0, int arg1, int arg2, Object arg3) {
    }

    @Override
    public int getColumnCount(int arg0) {
        return 1;
    }

    @Override
    public int getRowCount() {
        return 1;
    }

    @Override
    protected Object instantiateItem(ViewGroup arg0, int arg1, int arg2) {
        return null;
    }

    @Override
    public boolean isViewFromObject(View arg0, Object arg1) {
        return false;
    }
}

Im untergeordneten Rechteck des Hauptansichts-Stubs habe ich einen GridViewPager mit dem ID-Pager, genau wie oben angegeben:

<android.support.wearable.view.GridViewPager
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:keepScreenOn="true" />

Dieser Code löst eine unzulässige Statusausnahme aus und meldet, dass meine untergeordnete Ansicht bereits übergeordnete Elemente verfügt. Siehe unten

07-16 14:44:40.847  12940-12940/com.larvalabs.weartest E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.larvalabs.weartest, PID: 12940
java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
        at android.view.ViewGroup.addViewInner(ViewGroup.java:3561)
        at android.view.ViewGroup.addView(ViewGroup.java:3414)
        at android.support.wearable.view.GridViewPager.addView(GridViewPager.java:1088)
        at android.view.ViewGroup.addView(ViewGroup.java:3359)
        at android.view.ViewGroup.addView(ViewGroup.java:3335)
        at com.larvalabs.weartest.Gridder$1.onLayoutInflated(Gridder.java:30)
        at android.support.wearable.view.WatchViewStub.inflate(WatchViewStub.java:133)
        at android.support.wearable.view.WatchViewStub.onMeasure(WatchViewStub.java:141)
        at android.view.View.measure(View.java:16648)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at android.view.View.measure(View.java:16648)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
        at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2321)
        at android.view.View.measure(View.java:16648)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1959)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1145)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1340)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1032)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5657)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
        at android.view.Choreographer.doCallbacks(Choreographer.java:574)
        at android.view.Choreographer.doFrame(Choreographer.java:544)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:136)
        at android.app.ActivityThread.main(ActivityThread.java:5026)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
        at dalvik.system.NativeStart.main(Native Method)