Work around的方法是先监听onTouch事件来监听连续点击次数,每次点击都布置一个间隔时间的延时任务,延时任务执行时判断间隔内是否还有点击,如果没有则发布点击次数,重置计数。
实现代码如下:
/** * 连续点击事件监听器 可以用作双击事件 * */ public abstract class OnMultiTouchListener implements OnTouchListener { /** * 上次 onTouch 发生的时间 */ private long lastTouchTime = 0; /** * 已经连续 touch 的次数 */ private AtomicInteger touchCount = new AtomicInteger(0); private Runnable mRun = null; public void removeCallback() { if (mRun != null) { getMainLoopHandler().removeCallbacks(mRun); mRun = null; } } @Override public boolean onTouch(final View v, final MotionEvent event) { if (event.getAction() == MotionEvent.ACTION_UP) { final long now = System.currentTimeMillis(); lastTouchTime = now; touchCount.incrementAndGet(); //每点击一次就移除上一次的延迟任务,重新布置一个延迟任务 removeCallback(); mRun = new Runnable() { @Override public void run() {
//两个变量相等,表示时隔 multiTouchInterval之后没有新的touch产生, 触发事件并重置touchCount if (now == lastTouchTime) { onMultiTouch(v, event, touchCount.get()); touchCount.set(0); } } }; postTaskInUIThread(mRun, getMultiTouchInterval()); } return true; } /** * 连续touch的最大间隔, 超过该间隔将视为一次新的touch开始, 默认是400,推荐值,也可以由客户代码指定 * * @return */ protected int getMultiTouchInterval() { return 400; } /** * 连续点击事件回调 * * @param v * @param event * @param touchCount * 连续点击的次数 * @return */ public abstract void onMultiTouch(View v, MotionEvent event, int touchCount); }
使用代码:
mView.setOnTouchListener( new OnMultiTouchListener() { @Override public void onMultiTouch(View v, MotionEvent event, int touchCount) { if (touchCount == 2) { //双击 } } });
简洁直接的方法是用GestureDector类:
mView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { GestureDetector detector = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() { @Override public boolean onSingleTapUp(MotionEvent e) { return super.onSingleTapUp(e); } @Override public void onLongPress(MotionEvent e) { super.onLongPress(e); } @Override public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { return super.onScroll(e1, e2, distanceX, distanceY); } @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return super.onFling(e1, e2, velocityX, velocityY); } @Override public void onShowPress(MotionEvent e) { super.onShowPress(e); } @Override public boolean onDown(MotionEvent e) { return super.onDown(e); } @Override public boolean onDoubleTap(MotionEvent e) { return super.onDoubleTap(e); } @Override public boolean onDoubleTapEvent(MotionEvent e) { return super.onDoubleTapEvent(e); } @Override public boolean onSingleTapConfirmed(MotionEvent e) { return super.onSingleTapConfirmed(e); } @Override public boolean onContextClick(MotionEvent e) { return super.onContextClick(e); } }); detector.onTouchEvent(event); return false; } });