我有一个基于标签主机并使用片段的项目
在一个标签上它有一个listFragment,用户点击一个单元格并转到另一个片段,
从那里用户可以在该标签的片段之间滑动,
我让项目工作,直到我进入listFragment的单元格,
我需要检测向左或向右滑动以相应地更改碎片,
这里是我的代码:
public class PrepareSkin extends Fragment implements OnGestureListener{
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;
private GestureDetector gestureScanner;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
gestureScanner = new GestureDetector(this);
// TODO Auto-generated method stub
View myFragmentView = inflater.inflate(R.layout.prepare_skin, container, false);
Log.i("Mirko", "CREATO <<");
return myFragmentView;
}
public boolean onTouchEvent(MotionEvent me)
{
return gestureScanner.onTouchEvent(me);
}
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
try {
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.i("Mirko", "LEFTERS <<");
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.i("Mirko", "rIGTHERS >>");
}
else if(e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
} else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
}
} catch (Exception e) {
// nothing
}
return true;
}
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
float distanceY) {
// TODO Auto-generated method stub
return false;
}
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
}
那为什么我的手势识别器无法正常工作?
感谢,
答案 0 :(得分:1)
此链接似乎在您的小巷中:Android Fragment onCreateView with Gestures
虽然他们没有在他们的类中实现OnGestureListener
,而是将clickListener附加到他们的整个View中,然后以这种方式触发Gesture Listener,它仍然应用于你的代码片段。
另一个快速修复可能是您将onDown()
返回为false - 也许您应该将其返回为true。我知道,如果onUp()
之前未返回onDown()
,则Android无法识别true
。