我有一个以下ListActivity：
public class ShowDayActivity extends ListActivity implements OnItemClickListener {
private GestureDetector gestureDetector;
private View.OnTouchListener gestureListener;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.day);
registerForContextMenu(getListView());
gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View v,MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
};
getListView().setonItemClickListener(this);
getListView().setonTouchListener(gestureListener);
}
@SuppressWarnings("static-access")
@Override
public boolean onoptionsItemSelected(MenuItem item) {
...
return super.onoptionsItemSelected(item);
}
@Override
public boolean onContextItemSelected(MenuItem item) {
...
return super.onContextItemSelected(item);
}
Override
public void onItemClick(AdapterView<?> parent,View v,int pos,long id) {
editEvent(pos);
}
class MyGestureDetector extends SimpleOnGestureListener {
private static final int SWIPE_MIN_disTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELociTY = 200;
@Override
public boolean onFling(MotionEvent e1,MotionEvent e2,float veLocityX,float veLocityY) {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH) {
return false;
}
// right to left swipe
if (e1.getX() - e2.getX() > SWIPE_MIN_disTANCE && Math.abs(veLocityX) > SWIPE_THRESHOLD_VELociTY) {
Log.d("ICS-Calendar","Fling left");
return true;
} else if (e2.getX() - e1.getX() > SWIPE_MIN_disTANCE && Math.abs(veLocityX) > SWIPE_THRESHOLD_VELociTY) {
Log.d("ICS-Calendar","Fling right");
return true;
}
return false;
}
}
}
listItems上的contextListener(long-click)完美地工作.今天我添加了gestureListener和Detector,它也是这样,但是：
GestureDetector检测到一切都没有了,但是在完成了逻辑之后,会打开上下文菜单,这显然不是我想要的.任何想法我做错了,还是我可以做什么？
解决方法
通常,您需要调用cancelLongPress()方法,并检测到onFling后的所有视图的子项.但是对于AbsListView,这个方法什么也不做:(
但是我已经找到了解决方法：在onFling回调中,处理完所有内容后,为ListView对象执行下一步：
Event cancelEvent = Event.obtain(ev2); cancelEvent.setAction(MotionEvent.ACTION_UP); listView.onTouchEvent(cancelEvent);