android滑动值的计算

来源：互联网发布：ubuntu 安装 kde桌面编辑：程序博客网时间：2024/06/13 06:07

重写Activity的onTouchEvent方法：

    float x_temp01 = 0.0f;
float y_temp01 = 0.0f;
float x_temp02 = 0.0f;
float y_temp02 = 0.0f;

@Override
public boolean onTouchEvent(MotionEvent event)
{
      //获得当前坐标
         float x = event.getX();
         float y = event.getY();

         switch(event.getAction())
         {
                  case MotionEvent.ACTION_DOWN:
                  {
                     x_temp01 = x;
                     y_temp01 = y;
                  }
                  break;
                  case MotionEvent.ACTION_UP:
                  {
                     x_temp02 = x;
                     y_temp02 = y;

                     if(x_temp01!=0 && y_temp01!=0)//
                     {
                              // 比较x_temp01和x_temp02
                              // x_temp01>x_temp02       //向左
                              // x_temp01==x_temp02       //竖直方向或者没动
                              // x_temp01<x_temp02       //向右

                              if(x_temp01>x_temp02)//向左
                              {
                                    //移动了x_temp01-x_temp02
                              }

                              if(x_temp01<x_temp02)//向右
                              {
                                    //移动了x_temp02-x_temp01
                              }
                     }
                  }
                  break;
                  case MotionEvent.ACTION_MOVE:
                  {

                  }
                  break;

         }
         return super.onTouchEvent(event);
}