GestureDetector检测GridView项目上的DoubleClick
注意：这个特定的问题已经解决，但是存在严重的后续问题。 看看GestureDetector - 检测GridView项目中的双击，虽然在onTouchEvent（）中返回false
我想要检测图像GridView中不同项目的双击。 因此，我分配一个单独OnTouchListener到每个商品imageView在getView()的适配器的方法。 gestureDetector是适配器类的成员变量。
private GestureDetectorCompat gestureDetector;
public ImageGridViewAdapter(Context c, ArrayList<UriWrapper> startUpImages) {
mContext = c;
uriManager = new UriManager(startUpImages);
gestureDetector = new GestureDetectorCompat(mContext, new SingleTapConfirm());
}
public View getView(final int position, View recycled, ViewGroup parent) {
ViewHolder holder;
if (recycled == null) {
..... find items by id
} else{
holder = (ViewHolder) recycled.getTag();
}
// Set listener to item image
holder.image.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// Always returns false, the gestureDetector does not detect anything
boolean ret = gestureDetector.onTouchEvent(event);
// At least the onTouch-callback gets called with the correct position
Log.e(TAG, "onTouch returned " + ret + " at position " + position);
return true;
}
});
// Use glide library to load images into the image views
Glide.with(mContext)....into(holder.image);
return recycled;
}
私人类SingleTapConfirm扩展了GestureDetector.SimpleOnGestureListener {
@Override
public boolean onSingleTapConfirmed(MotionEvent event) {
Log.e(TAG, "onSingleTapConfirmed"); // never called..
return true;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
Log.e(TAG, "onDoubleTap"); // never called..
return super.onDoubleTap(e);
}
}
OnTouchListener的工作，并获得正确的位置调用。 但是，无论我在做什么， GestureDetector的方法都不会被调用。 这个代码似乎是什么问题？
更新 ：onTouch回调需要返回true，现在至少可以使用GestureDetector。 但是，返回true会打破其余的功能，因为我的GridView具有长按单选模式和全局OnTouchListener。
第二次更新：合并特定于项目的OnTouchListener和全局OnTouchListener无法正常工作。 （只在特定项目上识别滑动手势）我希望能够通过创建自定义View扩展ImageView并在其中分配特定于项目的OnTouchListener来解决这两个问题。
private GestureDetectorCompat gestureDetector;
// in your adapter constructor
gestureDetector = new GestureDetector(context, new SingleTapConfirm());
public View getView(final int position, View recycled, ViewGroup parent) {
ViewHolder holder;
if (recycled == null) {
.....find items by id
} else {
holder = (ViewHolder) recycled.getTag();
}
// Set listener to item image
holder.image.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// Use lazy initialization for the gestureDetector
gestureDetector.onTouchEvent(event);
// At least the onTouch-callback gets called with the correct position
return true;
}
});
// Use glide library to load images into the image views
Glide.with(mContext)....into(holder.image);
return recycled;
}
private class SingleTapConfirm extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onSingleTapConfirmed(MotionEvent event) {
Log.e(TAG, "onSingleTapConfirmed"); // never called..
return true;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
Log.e(TAG, "onDoubleTap"); // never called..
return super.onDoubleTap(e);
}
}
更新：
@Override
public boolean onTouch(View v, MotionEvent event) {anything
gestureDetector.onTouchEvent(event);
return true;
}