Question

Android Studio，Java

是否可以在单一视图上检测到触摸，触摸释放和滑动手势？我有一个按钮，我需要能够在其上收听所有这些信息。

我正在寻找一个解决方案，使侦听器/检测器最终调用这些方法，以便我可以轻松地使用它们：

public void buttonPressedDown() {

}

public void buttonReleased() {

}

public void swipeUp() {

}

public void swipeRight() {

}

public void swipeDown() {

}

public void swipeLeft() {

}

这在开发ios应用程序时很容易在xcode中完成，但是我似乎找不到找到针对Android的方法。

其他信息：这是我尝试过的：

    timerButton.setOnTouchListener(new View.OnTouchListener() { //Detecting a press down
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            timerDown();

            return false;
        }
    });

    timerButton.setOnTouchListener(new OnSwipeTouchListener(timerActivity.this) {//Detecting swipes

        public void onSwipeTop() {

            showStats();

        }

        public void onSwipeBottom() {

            showType();

        }

        public void onSwipeRight() {

            showMenu();

        }

        public void onSwipeLeft() {

            showTimes();

        }

    });


    .
    .
    .


    public void timerButtonPressed(View view) {//Detecting press releases
        timerUp();
    }

这似乎是我在寻找的东西，除了没有用。在同一视图上设置两个onTouchListeners时，仅调用了一个监听器。在我测试时，只有滑动检测有效，或者只有新闻检测有效。

帮助！？

编辑： 我已经尝试过了：

OnSwipeTouchListener.java

public class OnSwipeTouchListener implements View.OnTouchListener {

    private final GestureDetector gestureDetector;

    public OnSwipeTouchListener(Context context) {
        gestureDetector = new GestureDetector(context, new GestureListener());
    }

    public void onSwipeLeft() {
    }

    public void onSwipeRight() {
    }

    public boolean onTouch(View v, MotionEvent event) {
        return gestureDetector.onTouchEvent(event);
    }

    private final class GestureListener extends GestureDetector.SimpleOnGestureListener {

        private static final int SWIPE_DISTANCE_THRESHOLD = 100;
        private static final int SWIPE_VELOCITY_THRESHOLD = 100;

        @Override
        public boolean onDown(MotionEvent e) {
            return true;
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            float distanceX = e2.getX() - e1.getX();
            float distanceY = e2.getY() - e1.getY();
            if (Math.abs(distanceX) > Math.abs(distanceY) && Math.abs(distanceX) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                if (distanceX > 0)
                    onSwipeRight();
                else
                    onSwipeLeft();
                return true;
            }
            return false;
        }
    }
}

在我的活动中：

timerButton.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            OnSwipeTouchListener onSwipeTouchListener = new OnSwipeTouchListener(timerActivity.this);
            boolean result = onSwipeTouchListener.onTouch(v, event);
            // check if swipe was detected:
            if (result) return true;

            // Otherwise, detect other types of motion event
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    // touch down

                    timerDown();

                    break;
                case MotionEvent.ACTION_UP:
                    // touch released

                    timerUp();

                    break;
            }

            return false;
        }
    });

但是我如何从这里检测到滑动？另外，当我运行该应用程序时，它甚至不再检测触摸。

我也在活动中尝试了此操作

timerButton.setOnTouchListener(new OnSwipeTouchListener(timerActivity.this) {

        public void onSwipeLeft() {
            Log.i("LEFT", "LEFT");
        }

        public void onSwipeRight() {
            Log.i("RIGHT", "RIGHT");
        }

        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    // touch down

                    timerDown();

                    break;
                case MotionEvent.ACTION_UP:
                    // touch released

                    timerUp();

                    break;
            }

            return false;
        }
    });

现在，它可以检测到触摸，但不会检测到滑动。如果我删除了上面的@override onTouch方法，但仍然具有onSwipe方法，则可以检测到滑动。怎么这么复杂为什么它不能同时检测到滑动和触摸，我该如何解决？

Answer 1

我找到了解决方法。

在OnSwipeTouchListener.java中：

public class OnSwipeTouchListener implements View.OnTouchListener {

private final GestureDetector gestureDetector;

public OnSwipeTouchListener(Context context) {
    gestureDetector = new GestureDetector(context, new GestureListener());
}

public void onSwipeLeft() {
}

public void onSwipeRight() {
}

public void onSwipeBottom() {
}

public void onSwipeTop() {
}

public void onDownTouch() {

}

public boolean onTouch(View v, MotionEvent event) {
    return gestureDetector.onTouchEvent(event);
}

private final class GestureListener extends GestureDetector.SimpleOnGestureListener {

    private static final int SWIPE_DISTANCE_THRESHOLD = 100;
    private static final int SWIPE_VELOCITY_THRESHOLD = 100;

    @Override
    public boolean onDown(MotionEvent e) {
        onDownTouch();
        return false;
    }

    @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_DISTANCE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
                    if (diffX > 0) {
                        onSwipeRight();
                    } else {
                        onSwipeLeft();
                    }
                    result = true;
                }
            }
            else if (Math.abs(diffY) > SWIPE_DISTANCE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
                if (diffY > 0) {
                    onSwipeBottom();
                } else {
                    onSwipeTop();
                }
                result = true;
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return result;
    }
}

}

活动中：

要检测按钮释放，请按：（单击）

public void timerButtonPressed(View view) {

}

要检测滑动和向下滑动，请按：

timerButton.setOnTouchListener(new OnSwipeTouchListener(timerActivity.this) {

        public void onSwipeLeft() {

        }

        public void onSwipeRight() {

        }

        public void onSwipeBottom() {

        }

        public void onSwipeTop() {

        }

        public void onDownTouch() {

        }
    });

Answer 2

第二次调用setOnTouchListener会覆盖您之前的侦听器。您可以通过以下方式检测触摸和手势：

timerButton.setOnTouchListener(new View.OnTouchListener() { 
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // deliver motion event to your swipe listener
            boolean result = mySwipeListener.onTouch(event);
            // check if swipe was detected:
            if (result) return true;

            // Otherwise, detect other types of motion event
            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    // touch down
                    break;
                case MotionEvent.ACTION_UP:
                    // touch released
                    break;
                // etc... see this link for more motion events https://developer.android.com/reference/android/view/MotionEvent
            }

            return false;
        }
    });

以下是在滑动监听器上实现的示例：Android: How to handle right to left swipe gestures

检测滑动手势并触摸视图上的事件

2 个答案: