Note: 这个具体问题已经解决,但存在严重的后续问题 . 看看GestureDetector - Detect double click in GridView item's although returning false in onTouchEvent()
我想检测 GridView
图像中不同项目的双击 . 因此,我在适配器的 getView()
方法中为每个项目 imageView
分配了一个单独的 OnTouchListener
. 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;
}
私有类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
的工作并以正确的位置调用 . 但是,无论我在做什么,都不会调用 GestureDetector
的方法 . 这段代码似乎有什么问题?
Update :onTouch-callback需要返回true,现在至少GestureDetector工作 . 但是,返回true会破坏其余的功能,因为我有一个长按选择模式和一个用于我的GridView的全局OnTouchListener .
Second Update: 合并特定于项目的OnTouchListener和全局OnTouchListener无法正常工作 . (滑动手势仅在某些项目上识别)我希望通过创建自定义View扩展ImageView并在那里分配特定于项目的OnTouchListener,我可以解决这两个问题 .
1 回答
Update: