android 按钮拖动并点击判断

来源：互联网发布：优化游戏的软件哪个好编辑：程序博客网时间：2024/05/12 10:50
1.在onCreate里写        DisplayMetrics dm = getResources().getDisplayMetrics();          screenWidth = dm.widthPixels;          screenHeight = dm.heightPixels - 50;        btn_toPC.setOnTouchListener(this); //btn_toPC为要拖动的按钮2.覆写onTouch方法//touch to drag    @Override      public boolean onTouch(View v, MotionEvent event) {        int action=event.getAction();         Log.i("touch", "Touch:" + action);                switch(action) {        case MotionEvent.ACTION_DOWN:            lastX = (int)event.getRawX();            lastY = (int)event.getRawY();            isclick = false;//当按下的时候设置isclick为false            startTime = System.currentTimeMillis();              break;        case MotionEvent.ACTION_MOVE:              isclick = true;//当按钮被移动的时候设置isclick为true             int dx = (int)event.getRawX() - lastX;              int dy = (int)event.getRawY() - lastY;                        int left = v.getLeft() + dx;              int top = v.getTop() + dy;              int right = v.getRight() + dx;              int bottom = v.getBottom() + dy;                                  if(left < 0) {                  left = 0;                  right = left + v.getWidth();              }            if(right > screenWidth) {                  right = screenWidth;                  left = right - v.getWidth();              }            if(top < 0) {                  top = 0;                  bottom = top + v.getHeight();            }            if(bottom > screenHeight) {                bottom = screenHeight;                top = bottom - v.getHeight();            }            v.layout(left, top, right, bottom);            lastX = (int) event.getRawX();            lastY = (int) event.getRawY();            break;          case MotionEvent.ACTION_UP:            endTime = System.currentTimeMillis();              //当从点击到弹起小于半秒的时候,则判断为点击,如果超过则不响应点击事件              if ((endTime - startTime) > 0.1 * 1000L) {                  isclick = true;              } else {                isclick = false;              }            System.out.println("执行顺序up");              break;        }        return isclick;    }//——————  end  ——————
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