Swipt探测器手势android
@Override public boolean onTouchEvent（MotionEvent event）{if（gestureDetector.onTouchEvent（event））{return true; } return super.onTouchEvent（event）; } private void onLeftSwipe（）{//做些什么System.out.println（“left swipe”）; }
private void onRightSwipe() {
// Do something
System.out.println("right swipe");
}
// Private class for gestures
private class SwipeGestureDetector
extends SimpleOnGestureListener {
// Swipe properties, you can change it to make the swipe
// longer or shorter and speed
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 200;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
float diffAbs = Math.abs(e1.getY() - e2.getY());
float diff = e1.getX() - e2.getX();
if (diffAbs > SWIPE_MAX_OFF_PATH)
return false;
// Left swipe
if (diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
SlidingMenuActivity.this.onLeftSwipe();
// Right swipe
} else if (-diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
SlidingMenuActivity.this.onRightSwipe();
}
} catch (Exception e) {
Log.e("YourActivity", "Error on gestures");
}
return false;
}
}
我有，但它不工作，我无法检测左或右滑动。已宣布私人手势检测器gestureDetector; 在我的课堂上，加上oncreate活动我添加了gestureDetector =新的GestureDetector（新的SwipeGestureDetector（））;
但它不工作，没有印刷？ 我正在使用kitkat nexus 4。
您必须将侦听器应用于您喜欢它的View，如下所示：
myView.setOnTouchListener(new SwipeGestureDetector(this)....
尝试更新的代码
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
int SWIPE_THRESHOLD = 200;
int SWIPE_VELOCITY_THRESHOLD = 200;
public OnSwipeTouchListener(Context context) {
gestureDetector = new GestureDetector(context, new CustomGestureListenerClass());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class CustomGestureListenerClass extends SimpleOnGestureListener {
@Override
public boolean onDown(MotionEvent e) {
return false;
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
singleClicked(e);
return super.onSingleTapUp(e);
}
@Override
public boolean onScroll(MotionEvent startMotionEvent, MotionEvent endMotionEvent, float distanceX, float distanceY) {
return super.onScroll(startMotionEvent, endMotionEvent, distanceX, distanceY);
}
@Override
public boolean onFling(MotionEvent startMotionEvent, MotionEvent endMotionEvent, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = endMotionEvent.getY() - startMotionEvent.getY();
float diffX = endMotionEvent.getX() - startMotionEvent.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;
}
result = true;
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
// if you want done some portion before call this method then write here
}
public void onSwipeLeft() {
// if you want done some portion before call this method then write here
}
public void singleClicked(MotionEvent e) {
}
}