onLayout Fehler mit WearableListView

Question

Ich versuche, 10 zu folgen, um eine WearableListView zu erstellen. Ich habe ein Problem mit der BoxInsetLayout-Datei, weil ich beim Versuch, das Layout zu rendern, einen onLayout() -Fehler bekomme. Hier ist der Stack-Trace:

java.lang.ClassCastException: com.android.layoutlib.bridge.android.support.Adapter$ViewHolder cannot be cast to android.support.wearable.view.WearableListView$ViewHolder 
    at android.support.wearable.view.WearableListView.getChildViewHolder(WearableListView.java:521) 
    at android.support.wearable.view.WearableListView$LayoutManager.notifyChildrenAboutProximity(WearableListView.java:762) 
    at android.support.wearable.view.WearableListView$LayoutManager.performLayoutChildren(WearableListView.java:883) 
    at android.support.wearable.view.WearableListView$LayoutManager.onLayoutChildren(WearableListView.java:854) 
    at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:2118) 
    at android.support.v7.widget.RecyclerView.onLayout_Original(RecyclerView.java:2415) 
    at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java) 
    at android.view.View.layout(View.java:16630) 
    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
    at android.view.View.layout(View.java:16630) 
    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
    at android.support.wearable.view.BoxInsetLayout.onLayout_Original(BoxInsetLayout.java:318) 
    at android.support.wearable.view.BoxInsetLayout.onLayout(BoxInsetLayout.java) 
    at android.view.View.layout(View.java:16630) 
    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
    at android.view.View.layout(View.java:16630) 
    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079) 
    at android.view.View.layout(View.java:16630) 
    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
    at com.android.layoutlib.bridge.impl.RenderSessionImpl.render(RenderSessionImpl.java:376) 
    at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:428) 
    at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:350) 
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:510) 
    at com.android.tools.idea.rendering.RenderTask$2.compute(RenderTask.java:498) 
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:888) 
    at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:498) 
    at com.android.tools.idea.rendering.RenderTask.access$600(RenderTask.java:72) 
    at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:610) 
    at com.android.tools.idea.rendering.RenderTask$3.call(RenderTask.java:607) 
    at com.android.tools.idea.rendering.RenderService.runRenderAction(RenderService.java:362) 
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:607) 
    at com.android.tools.idea.rendering.RenderTask.render(RenderTask.java:629) 
    at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:480) 
    at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320) 
    at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310) 
    at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254) 
    at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269) 
    at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227) 
    at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217) 
    at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238) 
    at com.intellij.util.Alarm$Request$1.run(Alarm.java:351) 
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at java.lang.Thread.run(Thread.java:745) 

Dies ist meine XML-Datei, die eine WearableListView enthält:

<?xml version="1.0" encoding="utf-8"?> 
<android.support.wearable.view.BoxInsetLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:background="@color/grey" 
    android:layout_height="match_parent" 
    android:layout_width="match_parent"> 

    <FrameLayout 
     android:id="@+id/frame_layout" 
     android:layout_height="match_parent" 
     android:layout_width="match_parent" 
     app:layout_box="left|bottom|right"> 

     <android.support.wearable.view.WearableListView 
      android:id="@+id/wearable_list" 
      android:layout_height="match_parent" 
      android:layout_width="match_parent"> 
     </android.support.wearable.view.WearableListView> 

    </FrameLayout> 
</android.support.wearable.view.BoxInsetLayout> 

Auch auf meinem DevicesListActivity.java Ich habe die Schnittstelle WearableListView.ClickListener implementiert, aber ich ein null-WearableListView Objekt, wenn ich das Layout zu erhalten, indem id versuchen (ich glaube, dies geschieht, weil dieser Fehler, sagte ich vor, aber ich bin mir nicht sicher):

public class DevicesListActivity extends Activity implements WearableListView.ClickListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_devices_list); 
     final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub); 
     stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() { 
      @Override 
      public void onLayoutInflated(WatchViewStub stub) { 

      } 
     }); 

     WearableListView listView = (WearableListView) findViewById(R.id.wearable_list); 
     if (listView == null) { 
      Log.d("DevicesListActivity", "ListView is null"); 
     } else { 
      listView.setAdapter(new WearableListViewAdapter("Prueba", "00:00", this)); 
      listView.setClickListener(this); 
     } 

    } 

    @Override 
    public void onClick(WearableListView.ViewHolder viewHolder) { 
     Toast.makeText(this, "Clic realizado", Toast.LENGTH_LONG); 
    } 

    @Override 
    public void onTopEmptyRegionClick() { 

    } 
} 

Jede Hilfe?

Vielen Dank im Voraus.

Answer 1

Ich glaube nicht, dass Ihr zweiter Fehler aus dem onlayout() Fehler Problem kommt, da ich das gleiche habe und meine Wearable List View funktioniert perfekt.

Es könnte von der WatchViewStub kommen, wie ich es ohne Erfolg versucht habe und es wäre nützlich, die Xml mit Ihrer R.id.watch_view_stub zu haben.

Ich hoffe, es hilft.

fand ich eine Lösung für das onLayout-() Problem, das funktionieren, aber ich weiß nicht, ob es eine gute Sache ist: https://code.google.com/p/android/issues/detail?id=186918

diese Klasse erstellen:

public class WearableListViewFixEditor extends WearableListView { 
    public WearableListViewFixEditor(Context context) { 
     super(context); 
    } 

    public WearableListViewFixEditor(Context context, AttributeSet attrs) { 
     super(context, attrs); 
    } 

    public WearableListViewFixEditor(Context context, AttributeSet attrs, int defStyleAttr) { 
     super(context, attrs, defStyleAttr); 
    } 
    /** 
    * Override this method to implement the choice for the intellij android designer 
    */ 
    @Override 
    public ViewHolder getChildViewHolder(View child) { 
     if (!isInEditMode()) { 
      return super.getChildViewHolder(child); 
     } else { 
      /** 
      * Override this with an empty body to avoid an error in intellij android designer 
      */ 
      return new WearableListView.ViewHolder(new View(getContext())) { 
       @Override 
       protected void onCenterProximity(boolean isCentralItem, boolean animate) { 

       } 
      }; 
     } 
    } 
} 

Danach Ihre XML-Datei modifiziert wie folgt:

<?xml version="1.0" encoding="utf-8"?> 
<android.support.wearable.view.BoxInsetLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:background="@color/grey" 
    android:layout_height="match_parent" 
    android:layout_width="match_parent"> 

    <FrameLayout 
     android:id="@+id/frame_layout" 
     android:layout_height="match_parent" 
     android:layout_width="match_parent" 
     app:layout_box="left|bottom|right"> 

     <your.package.path.WearableListViewFixEditor 
      android:id="@+id/wearable_list" 
      android:layout_height="match_parent" 
      android:layout_width="match_parent"> 
     </your.package.path.WearableListViewFixEditor> 

    </FrameLayout> 
</android.support.wearable.view.BoxInsetLayout> 

Answer 2

konnte ich mein Problem mit dem null-WearableListView Objekt lösen folgenden this example, aber ich habe vergessen, die Antwort achtern posten er. Was ich getan habe, ist mein WearableListView Layout in die Datei round_activity_devices_list.xml bewegen (weil mein Gerät ist rund, aber ich denke, das ist auch auf einem rect Gerät funktionieren soll, wenn ich mein Layout rect_activity_devices_list.xml hinzufügen):

<?xml version="1.0" encoding="utf-8"?> 
<android.support.wearable.view.BoxInsetLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" 
    android:background="@color/grey" 
    tools:context=".DevicesListActivity"> 

    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center_horizontal" 
     android:layout_marginTop="25dp" 
     android:textSize="17dp" 
     android:text="Select a device" 
     android:id="@+id/listTitle"/> 

    <android.support.wearable.view.WearableListView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/wearable_list" 
     app:layout_box="all" /> 

</android.support.wearable.view.BoxInsetLayout> 

Dies sind die Java-Klassen ich habe jetzt:

WearableListViewAdapter.java

public class WearableListViewAdapter extends WearableListView.Adapter { 

    private final String TAG = "WearableListViewAdapter"; 

    private String[] deviceName; 
    private String deviceAddress = "Not being used."; 
    private final Context context; 
    private final LayoutInflater inflater; 

    public WearableListViewAdapter(Context context, String[] devices) { 
//  Log.d(TAG, "WearableListViewAdapter constructor accessed."); 
     this.deviceName = devices; 
//  this.deviceAddress = device; 
     this.context = context; 
     this.inflater = LayoutInflater.from(context); 
    } 

    @Override 
    public void onBindViewHolder(WearableListView.ViewHolder holder, int position) { 
     ItemViewHolder itemViewHolder = (ItemViewHolder) holder; 
     TextView deviceNameText = itemViewHolder.deviceNameText; 
     TextView deviceAddressText = itemViewHolder.deviceAddressText; 
     deviceNameText.setText(deviceName[position]); 
     deviceAddressText.setText(deviceAddress); 

     holder.itemView.setTag(position); 
     Log.d(TAG, "onBindViewHolder"); 
    } 

    @Override 
    public int getItemCount() { 
     return deviceName.length; 
    } 

    @Override 
    public WearableListView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     return new ItemViewHolder(inflater.inflate(R.layout.list_item, null)); 
    } 

    public static class ItemViewHolder extends WearableListView.ViewHolder { 
     private TextView deviceNameText; 
     private TextView deviceAddressText; 

     public ItemViewHolder (View itemView) { 
      super(itemView); 
      deviceNameText = (TextView) itemView.findViewById(R.id.deviceNameText); 
      deviceAddressText = (TextView) itemView.findViewById(R.id.deviceAddressText); 
     } 

    } 

} 

WearableListItemLayout.java

public class WearableListItemLayout extends LinearLayout 
     implements WearableListView.OnCenterProximityListener { 

    private ImageView deviceImg; 
    private TextView deviceName; 
    private TextView deviceAddress; 

    public WearableListItemLayout(Context context) { 
     this(context, null); 
    } 

    public WearableListItemLayout(Context context, AttributeSet attrs) { 
     this(context, attrs, 0); 
    } 


    public WearableListItemLayout(Context context, AttributeSet attrs, int defStyle) { 
     super(context, attrs, defStyle); 
    } 

    // Get references to the icon and text in the item layout definition 
    @Override 
    protected void onFinishInflate() { 
     super.onFinishInflate(); 
     // These are defined in the layout file for list items 
     // (see next section) 
     deviceImg = (ImageView) findViewById(R.id.deviceImg); 
     deviceName = (TextView) findViewById(R.id.deviceNameText); 
     deviceAddress = (TextView) findViewById(R.id.deviceAddressText); 
    } 

    @Override 
    public void onCenterPosition(boolean animate) { 
     deviceImg.animate().scaleX(1f).scaleY(1f).alpha(1); 
     deviceName.animate().scaleX(1f).scaleY(1f).alpha(1); 
     deviceAddress.animate().scaleX(1f).scaleY(1f).alpha(1); 
    } 

    @Override 
    public void onNonCenterPosition(boolean animate) { 
     deviceImg.animate().scaleX(0.8f).scaleY(0.8f).alpha(0.6f); 
     deviceName.animate().scaleX(0.8f).scaleY(0.8f).alpha(0.6f); 
     deviceAddress.animate().scaleX(1f).scaleY(1f).alpha(1); 
    } 
} 

DevicesListActivity.java

public class DevicesListActivity extends Activity implements WearableListView.ClickListener { 

    private final String TAG = "DevicesListActivity"; 
    private WearableListView listView; 
    private TextView listTitleText; 
    private Context context = this; 
    private Messenger mainActivityMessenger; 
    private String[] devicesName = { "SensorTag", "BH" }; 

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_devices_list); 
     final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub); 
     stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() { 
      @Override 
      public void onLayoutInflated(WatchViewStub stub) { 
       listView = (WearableListView) stub.findViewById(R.id.wearable_list); 
       listTitleText = (TextView) stub.findViewById(R.id.listTitle); 
       Log.d(TAG, "listView created."); 
       if (listView == null) { 
        Log.d("DevicesListActivity", "ListView is null"); 
       } else { 
        listView.setAdapter(new WearableListViewAdapter(context, devicesName)); 
        listView.setClickListener((WearableListView.ClickListener) context); 
        mainActivityMessenger = getIntent() 
          .getParcelableExtra("mainactivitymessenger"); 
       } 
      } 
     }); 
    } 
... 

Wie Sie das übergeordnete Layout sehen können, ist nach wie vor ein BoxInsetLayout, aber ich die FrameLayout entfernt, weil ich brauche es nicht für der Moment. Allerdings ist der Fehler mit onLayout() immer noch da, aber ich muss es nicht beheben, weil meine App korrekt funktioniert und es scheint nur ein Rendering-Problem zu sein.Wie auch immer, wenn Sie denken, dass diese Korrektur nicht korrekt ist oder Sie eine Lösung für den Fehler onLayout() haben, lassen Sie es mich wissen.

Vielen Dank.