1
我有一個叫做ProfileFragment.java
的片段,我想通過調用類OnSwipeTouchListener
來監聽觸摸手勢。如何在片段中使用setOnTouchListener?
下面是代碼ProfileFragment.java
一個片段:
rootLayout.setOnTouchListener(new OnSwipeTouchListener(ProfileFragment.this) {
@Override
public void onSwipeTop() {
super.onSwipeTop();
//folder_gridview.setVisibility(View.INVISIBLE);
// do something
}
});
從上面的代碼中,我得到這個錯誤:
OnSwipeTouchListener (android.content.Context) in OnSwipeTouchListener cannot be applied to (com.mydomain.sample.ProfileFragment)
這裏是OnSwipeTouchListener.java
類的代碼:
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
public OnSwipeTouchListener(Context ctx) {
gestureDetector = new GestureDetector(ctx, new GestureListener());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 1;
private static final int SWIPE_VELOCITY_THRESHOLD = 1;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
result = true;
} else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
result = true;
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
我能夠讓上面的代碼在一個活動上工作,但不能讓它在一個片段上工作。我如何得到它在一個片段上工作?