Android-GridView-GestureDetector不起作用
作者:互联网
我在应用程序中检测到挥动手势时遇到问题.
我的布局由GridView,几个TextView和按钮组成.
我实现了OnGestureListener:
public class MyActivity extends Activity implements OnGestureListener{
private GestureDetector myGesture ;
然后在OnCreate中:
myGesture = new GestureDetector(this);
和覆盖方法:
@Override
public boolean onTouchEvent(MotionEvent event){
return myGesture.onTouchEvent(event);
}
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//right to left fling
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//left to right fling
}
} catch (Exception e) {
// nothing
}
return false;
}
这实际上工作得很好,但是在GridView上却不行.无论在GridView之外的任何地方执行击退,它都可以工作.在GridView上-绝对没有反应.
我真的不知道该怎么办,因此,感谢您的任何事先帮助.
解决方法:
当事件被使用时,您是否在onFling中返回true(如下所示)?
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// TODO Auto-generated method stub
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//right to left fling
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//left to right fling
}
return true;
} catch (Exception e) {
// nothing
}
return false;
}
标签:gesturedetector,gestures,gridview,android 来源: https://codeday.me/bug/20191101/1985085.html