android 判断点击事件,android中根据touch事件判断单击及双击

最新推荐文章于 2024-06-27 17:25:00 发布

椒盐皮皮鲲

最新推荐文章于 2024-06-27 17:25:00 发布

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文章标签： android 判断点击事件

本文介绍了一种在Android中根据Touch事件判断单击和双击的方法。通过设置最大间隔和最大位移距离，实现了点击和移动的区分，并通过两个Runnable对象分别处理单击和双击事件。

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private static final int MAX_INTERVAL_FOR_CLICK = 250;

private static final int MAX_DISTANCE_FOR_CLICK = 100;

private static final int MAX_DOUBLE_CLICK_INTERVAL = 500;

int mDownX = 0;

int mDownY = 0;

int mTempX = 0;

int mTempY = 0;

boolean mIsWaitUpEvent = false;

boolean mIsWaitDoubleClick = false;

Runnable mTimerForUpEvent = new Runnable() {

public void run() {

if (mIsWaitUpEvent) {

Log.d(LOG_TAG,

"The mTimerForUpEvent has executed, so set the mIsWaitUpEvent as false");

mIsWaitUpEvent = false;

} else {

Log.d(LOG_TAG,

"The mTimerForUpEvent has executed, mIsWaitUpEvent is false,so do nothing");

}

};

@Override

public boolean onTouchEvent(MotionEvent event) {

if (!mIsWaitUpEvent && event.getAction() != MotionEvent.ACTION_DOWN) {

return super.onTouchEvent(event);

}

switch (event.getAction()) {

case MotionEvent.ACTION_DOWN:

mDownX = (int) event.getX();

mDownY = (int) event.getY();

mIsWaitUpEvent = true;

postDelayed(mTimerForUpEvent, MAX_INTERVAL_FOR_CLICK);

break;

case MotionEvent.ACTION_MOVE:

mTempX = (int) event.getX();

mTempY = (int) event.getY();

if (Math.abs(mTempX - mDownX) > MAX_DISTANCE_FOR_CLICK

|| Math.abs(mTempY - mDownY) > MAX_DISTANCE_FOR_CLICK) {

mIsWaitUpEvent = false;

removeCallbacks(mTimerForUpEvent);

Log.d(LOG_TAG, "The move distance too far:cancel the click");

}

break;

case MotionEvent.ACTION_UP:

mTempX = (int) event.getX();

mTempY = (int) event.getY();

if (Math.abs(mTempX - mDownX) > MAX_DISTANCE_FOR_CLICK

|| Math.abs(mTempY - mDownY) > MAX_DISTANCE_FOR_CLICK) {

mIsWaitUpEvent = false;

removeCallbacks(mTimerForUpEvent);

Log.d(LOG_TAG,

"The touch down and up distance too far:cancel the click");

break;

} else {

mIsWaitUpEvent = false;

removeCallbacks(mTimerForUpEvent);

onSingleClick();

return super.onTouchEvent(event);

}

case MotionEvent.ACTION_CANCEL:

mIsWaitUpEvent = false;

removeCallbacks(mTimerForUpEvent);

Log.d(LOG_TAG, "The touch cancel state:cancel the click");

break;

default:

Log.d(LOG_TAG, "irrelevant MotionEvent state:" + event.getAction());

}

return super.onTouchEvent(event);

}

Runnable mTimerForSecondClick = new Runnable() {

@Override

public void run() {

if (mIsWaitDoubleClick) {

Log.d(LOG_TAG,

"The mTimerForSecondClick has executed,so as a singleClick");

mIsWaitDoubleClick = false;

// at here can do something for singleClick!!

} else {

Log.d(LOG_TAG,

"The mTimerForSecondClick has executed, the doubleclick has executed ,so do thing");

}

};

public void onSingleClick() {

if (mIsWaitDoubleClick) {

onDoubleClick();

mIsWaitDoubleClick = false;

removeCallbacks(mTimerForSecondClick);

} else {

mIsWaitDoubleClick = true;

postDelayed(mTimerForSecondClick, MAX_DOUBLE_CLICK_INTERVAL);

}

public void onDoubleClick() {

Log.d(LOG_TAG,"we can do sth for double click here");

}