Question

我有一个带有滑动侦听器的TextView。我也想添加一个长按一下监听器。它们都可以工作，但是当我滑动时，也会触发长按聆听器，这不是我想要的。我需要他们独立。我发现了一些very old code关于检测长按的问题，但目前还不是很清楚什么是最好的方法。

这是我在MainActivity中的内容

tvIta.setOnTouchListener(new OnSwipeTouchListener(MainActivity.this) {
                @Override
                public void onSwipeRight() {changeSays(); }
                @Override
                public void onSwipeLeft() { changeSays(); }
            });

tvIta.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                String label = "Label_Ita";
                String text = tvIta.getText().toString();
                ClipboardManager clipboard = (ClipboardManager) getSystemService(MainActivity.this.CLIPBOARD_SERVICE);
                ClipData clip = ClipData.newPlainText(label, text);
                clipboard.setPrimaryClip(clip);
                Toast.makeText(MainActivity.this, "Copied to clipboard!", Toast.LENGTH_SHORT).show();
                return true;
            }
        });

这是滑动侦听器类

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;

// commented out otherwise won't work
//        @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;
        }
    }
}

谢谢！

Answer 1

尝试使用布尔值同步两个事件。以下代码是一个示例：

boolean swiped = false;
boolean clicked = false;

tvIta.setOnTouchListener(new OnSwipeTouchListener(MainActivity.this) {
            @Override
            public void onSwipeRight() {
                if(!clicked) {
                    swiped = true;
                    changeSays();
                }
            }
            @Override
            public void onSwipeLeft() {
                if(!clicked) {
                    swiped = true;
                    changeSays();
                }
            }
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                if(event.getAction() == MotionEvent.ACTION_UP) {
                    swiped = false;
                    clicked = false;
                }
                return super(v, event);
            }
        });

tvIta.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                if(!swiped) {
                    clicked = true;
                    String label = "Label_Ita";
                    String text = tvIta.getText().toString();
                    ClipboardManager clipboard = (ClipboardManager) getSystemService(MainActivity.this.CLIPBOARD_SERVICE);
                    ClipData clip = ClipData.newPlainText(label, text);
                    clipboard.setPrimaryClip(clip);
                    Toast.makeText(MainActivity.this, "Copied to clipboard!", Toast.LENGTH_SHORT).show();
                }
                return true;
            }
        });

Android - 刷卡/ onLongClick冲突

1 个答案: