NestedScrollView＆RecyclerView，onLongPress事件

我有佈局： NestedScrollView＆RecyclerView，onLongPress事件

<android.support.design.widget.AppBarLayout 
    android:id="@+id/appbar" 
    android:layout_width="match_parent" 
    android:layout_height="256dp" 
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
    android:fitsSystemWindows="true"> 

    <android.support.design.widget.CollapsingToolbarLayout 
     android:id="@+id/collapsing_toolbar" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:layout_scrollFlags="scroll|exitUntilCollapsed" 
     android:fitsSystemWindows="true" 
     app:contentScrim="?attr/colorPrimary"> 

     <LinearLayout 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:background="#99000000" 
      android:layout_marginRight="3dp" 
      android:layout_marginEnd="3dp" 
      android:layout_marginBottom="15dp" 
      android:layout_gravity="start|bottom" 
      android:padding="2dp"> 
      <Spinner 
       android:id="@+id/spinnerPrice" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content"> 
      </Spinner> 
     </LinearLayout> 
    </android.support.design.widget.CollapsingToolbarLayout> 

</android.support.design.widget.AppBarLayout> 

<android.support.v4.widget.NestedScrollView 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" 
     android:paddingTop="24dp"> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textAppearance="?android:attr/textAppearanceLarge" 
      android:text="" 
      android:textStyle="bold" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"/> 

     <android.support.v7.widget.RecyclerView 
      android:id="@+id/recyclerview" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"> 
     </android.support.v7.widget.RecyclerView> 

     <android.support.v7.widget.CardView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"> 
      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       style="@style/Widget.CardContent"> 
       <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:text="@string/title1"/> 
       <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:text="" 
        android:textColor="@color/black"/> 
      </LinearLayout> 

     </android.support.v7.widget.CardView> 

     <android.support.v7.widget.CardView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       style="@style/Widget.CardContent"> 

       <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:text="@string/title2"/> 
       <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:text="" 
        android:textColor="@color/black"/> 

      </LinearLayout> 

     </android.support.v7.widget.CardView> 

     <android.support.v7.widget.CardView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       style="@style/Widget.CardContent"> 

       <TextView 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" 
        android:text="@string/title5" 
        android:textAppearance="@style/TextAppearance.AppCompat.Title" 
        android:layout_marginBottom="16dp" /> 

       <android.support.v7.widget.RecyclerView 
        android:id="@+id/contacts_recyclerview" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content"> 
       </android.support.v7.widget.RecyclerView> 

       <TextView 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:textAppearance="?android:attr/textAppearanceSmall" 
        android:text="@string/title3"/> 
      </LinearLayout> 

     </android.support.v7.widget.CardView> 


     <TextView 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_gravity="end" 
      android:gravity="end" 
      android:layout_marginBottom="16dp" 
      android:layout_marginLeft="16dp" 
      android:layout_marginRight="16dp"/> 

    </LinearLayout> 

</android.support.v4.widget.NestedScrollView> 

<android.support.design.widget.FloatingActionButton 
    android:id="@+id/fab" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_margin="16dp" 
    android:clickable="true" 
    android:src="@mipmap/ic_add_white_18dp" 
    app:layout_anchor="@id/collapsing_toolbar" 
    app:layout_anchorGravity="bottom|right|end"/> 

</android.support.design.widget.CoordinatorLayout>

在java文件：

RecyclerView mRecyclerView = (RecyclerView) mActivity.findViewById(R.id.recyclerview); 
mContactsRecyclerView.setNestedScrollingEnabled(false); 
mContactsRecyclerView.setHasFixedSize(true); 
mContactsRecyclerView.addOnItemTouchListener(new RecyclerItemClickListener(mActivity, mContactsRecyclerView, 
    new RecyclerItemClickListener.OnItemClickListener() { 
     @Override 
     public void onItemClick(View view, int position) { 
      Toast.makeText(mActivity, "OnItemClick", Toast.LENGTH_SHORT).show(); 
     } 

     @Override 
     public void onItemLongClick(View view, int position) { 
      Toast.makeText(mActivity, "onItemLongClick", Toast.LENGTH_SHORT).show(); 
     } 
})); 
mContactsRecyclerView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 
       Math.round(recyclerData.size() * mActivity.getResources().getDimension(R.dimen.recycler_row))));

RecyclerItemClickListener.java：

public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener 
{ 
    public interface OnItemClickListener 
    { 
     void onItemClick(View view, int position); 
     void onItemLongClick(View view, int position); 
    } 

    private OnItemClickListener mListener; 
    private GestureDetector mGestureDetector; 

    public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) 
    { 
     mListener = listener; 

     mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() 
     { 
      @Override 
      public boolean onSingleTapUp(MotionEvent e) 
      { 
       return true; 
      } 

      @Override 
      public void onLongPress(MotionEvent e) 
      { 
       View childView = recyclerView.findChildViewUnder(e.getX(), e.getY()); 

       if(childView != null && mListener != null) 
       { 
        mListener.onItemLongClick(childView, recyclerView.getChildAdapterPosition(childView)); 
       } 
      } 
     }); 
    } 

    @Override 
    public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) 
    { 
     View childView = view.findChildViewUnder(e.getX(), e.getY()); 
     if(childView != null && mListener != null && mGestureDetector.onTouchEvent(e)) 
     { 
      mListener.onItemClick(childView, view.getChildAdapterPosition(childView)); 
     } 

     return false; 
    } 

    @Override 
    public void onTouchEvent(RecyclerView view, MotionEvent motionEvent){} 

    @Override 
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {} 
}

它的工作，但我OnLongClick事件有問題，如果開始滾動項目RecyclerView，它是調用onItemLongClick。
如何防止滾動NestedScrollView事件RecyclerView onItemLongClick？

來源

2016-02-02 waki

找到解決方案，需要在Adapter ViewHolder中實現OnClickListener，OnLongClickListener，並從RecyclerView中移除偵聽器。

public class ViewHolder extends RecyclerView.ViewHolder 
     implements View.OnClickListener, AdapterView.OnLongClickListener { 
    CardView cv; 

    ViewHolder(View itemView) { 
     super(itemView); 
     cv = (CardView) itemView.findViewById(R.id.cv); 

     cv.setOnClickListener(this); 
     cv.setOnLongClickListener(this); 
    } 

    @Override 
    public void onClick(View view) { 
     if (view != null) { 
      int itemPosition = getAdapterPosition(); 
      switch (view.getId()) { 
       case R.id.cv: 
        // 
        break; 
      } 
     } 
    } 

    @Override 
    public boolean onLongClick(View view) { 
     if (view != null) { 
      int itemPosition = getAdapterPosition(); 
      switch (view.getId()) { 
       case R.id.cv: 
        // 
        break; 

      } 
     } 
     return false; 
    } 
}

來源

2016-02-03 10:30:18 waki

NestedScrollView＆RecyclerView，onLongPress事件

回答

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