Android通过onTouch事件实现单击，双击，长按

最新推荐文章于 2022-08-26 16:50:28 发布

原创最新推荐文章于 2022-08-26 16:50:28 发布 · 5.6k 阅读

4 ·

CC 4.0 BY-SA版权

Android 专栏收录该内容

42 篇文章

订阅专栏

本文介绍了一种在触摸屏设备上处理点击事件的方法，通过使用延时和其他判断条件来区分单击、双击和长按操作。代码示例中详细解释了如何利用Handler和Runnable来实现这些功能。

一般采用延时做法。

private intmClickcount;// 点击次数
private int mDownX;
private int mDownY;
private int mMoveX;
private int mMoveY;
private int mUpX;
private int mUpY;
private long mLastDownTime;
private long mLastUpTime;
private long mFirstClick;
private long mSecondClick;
private boolean isDoubleClick=false;
private int MAX_LONG_PRESS_TIME=350;// 长按/双击最长等待时间
private int MAX_SINGLE_CLICK_TIME=50;// 单击最长等待时间
private int MAX_MOVE_FOR_CLICK=50;// 最长改变距离,超过则算移动

private HandlermBaseHandler=newHandler();

private RunnablemLongPressTask=newRunnable() {
    @Override
    public voidrun() {
        //处理长按
         mClickcount=0;
    }
};

private RunnablemSingleClickTask=newRunnable() {
    @Override
    public voidrun() {
        // 处理单击
        mClickcount=0;
    }
};

myView.setOnTouchListener(newView.OnTouchListener() {
@Override
public booleanonTouch(View v,MotionEvent event) {

        switch(event.getAction()) {
            caseMotionEvent.ACTION_DOWN:
                mLastDownTime= System.currentTimeMillis();
                mDownX= (int) event.getX();
                mDownY= (int) event.getY();
                mClickcount++;
                Log.e("mouse","DOWN-->mClickcount="+mClickcount+"; isDoubleClick="+isDoubleClick);
                if (mSingleClickTask!=null) {
                    mBaseHandler.removeCallbacks(mSingleClickTask);
                }
                if(!isDoubleClick)mBaseHandler.postDelayed(mLongPressTask,MAX_LONG_PRESS_TIME);
                if (1==mClickcount) {
                    mFirstClick= System.currentTimeMillis();
                }else if(mClickcount==2) {// 双击
                    mSecondClick= System.currentTimeMillis();
                    if (mSecondClick-mFirstClick<=MAX_LONG_PRESS_TIME) {
                        //处理双击

                        isDoubleClick=true;
                        mClickcount=0;
                        mFirstClick=0;
                        mSecondClick=0;
                        mBaseHandler.removeCallbacks(mSingleClickTask);
                        mBaseHandler.removeCallbacks(mLongPressTask);
                        Log.e("mouse","double double double....");
                    }
                }
                break;
            case MotionEvent.ACTION_MOVE:
                mMoveX= (int) event.getX();
                mMoveY= (int) event.getY();
                int absMx = Math.abs(mMoveX-mDownX);
                int absMy = Math.abs(mMoveY-mDownY);
                Log.e("mouse","MOVE-->absMx="+ absMx +"; absMy="+ absMy);
                if (absMx >MAX_MOVE_FOR_CLICK&& absMy >MAX_MOVE_FOR_CLICK) {
                    mBaseHandler.removeCallbacks(mLongPressTask);
                    mBaseHandler.removeCallbacks(mSingleClickTask);

isDoubleClick= false;
  mClickcount= 0;//移动了
                }
                if(absMx >=5&& absMy >=5) {
//处理移动

isDoubleClick= false;
  mClickcount= 0;//移动了
                }

                break;
            case MotionEvent.ACTION_UP:
                mLastUpTime= System.currentTimeMillis();
                mUpX= (int) event.getX();
                mUpY= (int) event.getY();
                int mx = Math.abs(mUpX-mDownX);
                int my = Math.abs(mUpY-mDownY);
                Log.e("mouse","UP-->mx="+ mx +"; my="+ my);
                if (mx <=MAX_MOVE_FOR_CLICK&& my <=MAX_MOVE_FOR_CLICK) {
                    if((mLastUpTime-mLastDownTime) <=MAX_LONG_PRESS_TIME) {
                        mBaseHandler.removeCallbacks(mLongPressTask);
                        if (!isDoubleClick)mBaseHandler.postDelayed(mSingleClickTask,MAX_SINGLE_CLICK_TIME);
                    }else{
                        //超出了双击间隔时间
                        mClickcount=0;
                    }
                } else{
                    //移动了
                    mClickcount=0;
                }
                if(isDoubleClick)isDoubleClick=false;
                taiqi();
                break;
        }
        return true;
    }
});