RecyclerView kullanarak hata: Belirtilen çocuğun zaten bir üst sürümü var

Question

Yeni bir RecyvlerView Adapter ile bir liste oluşturmaya çalışıyorum. Android geliştirici kaynaklarında bulunan tam kılavuzu takip ettim. Ama bu bana garip bir hata veriyor: Belirtilen çocuğun zaten bir üst bilgisi var. Önce çocuğun ebeveyinde removeView() öğesini çağırmalısınız. En son SDK sahibim. Bağımlılıkları da tanımlarım.

MyActivity (Ana Faaliyet):

public class MyActivity extends Activity { 

    private RecyclerView mRecyclerView; 
    private RecyclerView.Adapter mAdapter; 
    private RecyclerView.LayoutManager mLayoutManager; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_my); 
     mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view); 

     // use this setting to improve performance if you know that changes 
     // in content do not change the layout size of the RecyclerView 
     mRecyclerView.setHasFixedSize(true); 

     // use a linear layout manager 
     mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); 
     mRecyclerView.setItemAnimator(new DefaultItemAnimator()); 

     // specify an adapter (see also next example) 
     mAdapter = new MyAdapter(new String[]{"Zain", "Nadeem"}); 

     mRecyclerView.setAdapter(mAdapter); 


    } 


} 

MyAdapter:

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { 
    private String[] mDataset; 

    // Provide a reference to the views for each data item 
    // Complex data items may need more than one view per item, and 
    // you provide access to all the views for a data item in a view holder 


    // Provide a suitable constructor (depends on the kind of dataset) 
    public MyAdapter(String[] myDataset) { 
     mDataset = myDataset; 
    } 

    // Create new views (invoked by the layout manager) 
    @Override 
    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, 
                int viewType) { 
     // create a new view 
     LayoutInflater inflater = LayoutInflater.from(parent.getContext()); 



     View v = inflater.inflate(R.layout.my_text_view, parent, true); 



     ViewHolder vh = new ViewHolder(v); 

     return vh; 
    } 

    // Replace the contents of a view (invoked by the layout manager) 
    @Override 
    public void onBindViewHolder(ViewHolder holder, int position) { 
     // - get element from your dataset at this position 
     // - replace the contents of the view with that element 

     holder.mTextView.setText(mDataset[position]); 



    } 

    // Return the size of your dataset (invoked by the layout manager) 
    @Override 
    public int getItemCount() { 
     return mDataset.length; 
    } 

    public static class ViewHolder extends RecyclerView.ViewHolder { 
     // each data item is just a string in this case 
     public TextView mTextView; 
     public ViewHolder(View v) { 
      super(v); 
      mTextView = (TextView) v.findViewById(R.id.item_title); 
     } 
    } 
} 

my_text_view.xml (liste öğeleri için düzeni):

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="80dp" 

    > 
    <!-- title --> 
    <TextView 
     android:id="@+id/item_title" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:textColor="@android:color/darker_gray" 
     android:layout_marginLeft="8dp" 
     android:layout_marginRight="8dp" 
     android:layout_marginTop="8dp" 
     android:textSize="22dp" /> 

</RelativeLayout> 

activity_my.xml (ana aktivite):

10-28 01:20:30.287 22729-22729/osman.zaingz.com.lollipop E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: osman.zaingz.com.lollipop, PID: 22729 
    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:3562) 
      at android.view.ViewGroup.addView(ViewGroup.java:3415) 
      at android.view.ViewGroup.addView(ViewGroup.java:3360) 
      at android.support.v7.widget.RecyclerView$4.addView(RecyclerView.java:322) 
      at android.support.v7.widget.ChildHelper.addView(ChildHelper.java:79) 
      at android.support.v7.widget.RecyclerView$LayoutManager.addViewInt(RecyclerView.java:4845) 
      at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:4803) 
      at android.support.v7.widget.RecyclerView$LayoutManager.addView(RecyclerView.java:4791) 
      at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1316) 
      at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1265) 
      at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:522) 
      at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:1918) 
      at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:2155) 
      at android.view.View.layout(View.java:14817) 
      at android.view.ViewGroup.layout(ViewGroup.java:4631) 
      at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671) 
      at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1660) 
      at android.widget.LinearLayout.onLayout(LinearLayout.java:1436) 
      at android.view.View.layout(View.java:14817) 
      at android.view.ViewGroup.layout(ViewGroup.java:4631) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:388) 
      at android.view.View.layout(View.java:14817) 
      at android.view.ViewGroup.layout(ViewGroup.java:4631) 
      at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:374) 
      at android.view.View.layout(View.java:14817) 
      at android.view.ViewGroup.layout(ViewGroup.java:4631) 
      at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453) 
      at android.widget.FrameLayout.onLayout(FrameLayout.java:388) 
      at android.view.View.layout(View.java:14817) 
      at android.view.ViewGroup.layout(ViewGroup.java:4631) 
      at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1983) 
      at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1740) 
      at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996) 
      at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600) 
      at android.view.Choreographer$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$FrameDisplayEventReceiver.run(Choreographer.java:747) 
      at android.os.Handler.handleCallback(Handler.java:733) 
      at android.os.Handler.dispatchMessage(Handler.java:95) 
      at android.os.Looper.loop(Looper.java:136) 
      at android.app.ActivityThread.main(ActivityThread.java:5001) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 

Lütfen bu sorunu düzeltmek bana yardım: Burada

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:layout_height="fill_parent" 
    android:layout_width="fill_parent" 
    android:background="@android:color/holo_orange_light" 
    > 
    <!-- A CardView that contains a TextView --> 
    <android.support.v7.widget.RecyclerView 
     android:id="@+id/my_recycler_view" 
     android:scrollbars="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     tools:context=".MyActivity"/> 


    </LinearLayout> 

Velogcat çıkıştır. Şişirdiğinizde görünümü ebeveynine eklememelisiniz.

Answer 1

yazdığın:

View v = inflater.inflate(R.layout.my_text_view, parent, true); 

olması gereken: Bu id item_title ile TextView üstüdür

View v = inflater.inflate(R.layout.my_text_view, parent, false); 

Answer 2

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="80dp"> 

<TextView 
    android:id="@+id/item_title" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:textColor="@android:color/darker_gray" 
    android:layout_marginLeft="8dp" 
    android:layout_marginRight="8dp" 
    android:layout_marginTop="8dp" 
    android:textSize="22dp" /> 

</RelativeLayout> 

RelativeLayout. Ardından, RecyclerView, ebeveyn içeren bir TextView eklemeye çalışırken istisna atar. Eğer gerçekten hızlı recyclerview kaydırma eğer

public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, 
                int viewType) { 
     // create a new view 
     Log.d(TAG, "onCreateViewHolder"); 
     RelativeLayout v = (RelativeLayout)LayoutInflater.from(parent.getContext()) 
       .inflate(R.layout.list_item, parent, false); 
     // set the view's size, margins, paddings and layout parameters 
     View view = v.findViewById(R.id.text1); 
     v.removeView(view); 
     ViewHolder vh = new ViewHolder(view); 
     return vh; 
    } 

Answer 3

Çok olur:

bu kodu deneyin. Davam hareketli/takmadan edildi/... diffutils olan öğeler ve recyclerview animasyonlar