标签:gesture android java android-recyclerview
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) {
}
}
解决方法:
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) {
}
只需处理RecyclerView中的单击和长按事件即可.
标签:gesture,android,java,android-recyclerview
来源: https://codeday.me/bug/20190928/1828114.html
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