通過onTouchEvent判斷是否為雙擊事件，通過前面一次up 跟本次down之間的時間差，并且點擊的點的坐標偏移來確定是否為雙擊事件DOUBLE_TAP_TIMEOUT。

boolean isMove = false;private final int DOUBLE_TAP_TIMEOUT = 200;private MotionEvent mCurrentDownEvent;private boolean mDoubleTapEnabled = false;private MotionEvent mPreviousUpEvent;@Overridepublic void onTouchEvent(MotionEvent event) {Log.e(LOG_TAG, "MotionEvent="+ event.getAction()+",isMove="+isMove);Log.e(LOG_TAG, "mPreviousUpEvent="+ mPreviousUpEvent+",mCurrentDownEvent="+mCurrentDownEvent);if (event.getAction() == MotionEvent.ACTION_MOVE) { isMove = true;}else if (event.getAction() == MotionEvent.ACTION_DOWN) {if (mPreviousUpEvent != null && mCurrentDownEvent != null && isConsideredDoubleTap(mCurrentDownEvent, mPreviousUpEvent, event)) {if (mDoubleTapEnabled && Environment.getExternalStorageState().equals("mounted")) { Toast.makeText(getApplicationContext(), getResources().getString(R.string.double_click), Toast.LENGTH_LONG).show();}}mCurrentDownEvent = MotionEvent.obtain(event);}else if (event.getAction() == MotionEvent.ACTION_UP){mPreviousUpEvent = MotionEvent.obtain(event);isMove = false;}}private boolean isConsideredDoubleTap(MotionEvent firstDown, MotionEvent firstUp, MotionEvent secondDown){if (secondDown.getEventTime() - firstUp.getEventTime() > DOUBLE_TAP_TIMEOUT) {return false;} int deltaX =(int) firstUp.getX() - (int)secondDown.getX();int deltaY =(int) firstUp.getY()- (int)secondDown.getY(); return deltaX * deltaX + deltaY * deltaY < 10000;}

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轉載于:https://www.cnblogs.com/renhui/p/9480948.html

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