将RecyclerView.OnItemTouchListener中的MotionEvent传递给GestureDetectorCompat
我有一个Fragment实现RecyclerView.OnItemTouchListener。 如何仅将单击和长按动作事件从RecyclerView传递到GestureDetectorCompat。 这就是我的意思是我只想处理点击和长按，其他事件应该由RecyclerView处理，因为它会正常发生。 我怎么设置它？
public class MyFragment extends Fragment implements RecyclerView.OnItemTouchListener, GestureDetector.OnGestureListener { protected RecyclerView recyclerView; protected RecyclerView.Adapter adapter; protected LinearLayoutManager layoutManager; private GestureDetectorCompat detector; public MyFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.myfrag, container, false); recyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerview); layoutManager = new LinearLayoutManager(getActivity()); recyclerView.setLayoutManager(layoutManager); recyclerView.addOnItemTouchListener(this); adapter = new MyAdapter(myData)); recyclerView.setAdapter(adapter); return rootView; } @Override public boolean onDown(MotionEvent e) { return false; } @Override public void onShowPress(MotionEvent e) { } @Override public boolean onSingleTapUp(MotionEvent e) { return false; } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return false; } @Override public void onLongPress(MotionEvent e) { } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return false; } @Override public boolean onInterceptTouchEvent(RecyclerView recyclerView, MotionEvent event) { return false; } @Override public void onTouchEvent(RecyclerView recyclerView, MotionEvent event) { } } 您必须在onCreateView()方法中初始化GestureDetectorCompat ：
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.myfrag, container, false); detector = new GestureDetectorCompat(getActivity(), new RecyclerViewOnGestureListener()); recyclerView = (RecyclerView) rootView.findViewById(R.id.recyclerview); layoutManager = new LinearLayoutManager(getActivity()); recyclerView.setLayoutManager(layoutManager); recyclerView.addOnItemTouchListener(this); adapter = new MyAdapter(myData)); recyclerView.setAdapter(adapter); return rootView; }
RecyclerViewOnGestureListener是您自己的内部类，它扩展了SimpleOnGestureListener （它提供了OnGestureListener方法的空实现）
private class RecyclerViewOnGestureListener extends SimpleOnGestureListener { @Override public boolean onSingleTapConfirmed(MotionEvent e) { View view = recyclerView.findChildViewUnder(e.getX(), e.getY()); int position = recyclerView.getChildPosition(view); // handle single tap return super.onSingleTapConfirmed(e); } public void onLongPress(MotionEvent e) { View view = recyclerView.findChildViewUnder(e.getX(), e.getY()); int position = recyclerView.getChildPosition(view); // handle long press super.onLongPress(e); } }
现在看一下行（来自onCreateView()方法）：
recyclerView.addOnItemTouchListener(this);
在我们的例子中，’this’是OnItemTouchListener包含我们需要实现的两个方法：
@Override public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) { detector.onTouchEvent(e); return false; } @Override public void onTouchEvent(RecyclerView rv, MotionEvent e) { }
以下是这些方法的解释： https ： //developer.android.com/reference/android/support/v7/widget/RecyclerView.OnItemTouchListener.html
只需处理RecyclerView单击和长按事件即可。
我可能会迟到但是为了获得视觉反馈，请将其添加到list_item布局中
android:background="@drawable/tranparent_selector" android:clickable="true" android:focusable="true" android:focusableInTouchMode="true"
此外，可以使用onSingleTapUp而不是onSingleTapConfirmed，因为攻丝通常很快。 因此，如果您快速点击其他项目，您将无法正常工作。 为了快速点击，我更喜欢onSingleTapUp