Android activity和view判断滑动

android activity和view判断滑动

       实例代码：

//手指按下的点为(x1, y1)手指离开屏幕的点为(x2, y2) 
 float x1 = 0; 
 float x2 = 0; 
 float y1 = 0; 
 float y2 = 0; 
 
 @override 
 public boolean ontouchevent(motionevent event) { 
 //继承了activity的ontouchevent方法，直接监听点击事件 
 if(event.getaction() == motionevent.action_down) { 
 //当手指按下的时候 
 x1 = event.getx(); 
 y1 = event.gety(); 
 } 
 if(event.getaction() == motionevent.action_up) { 
 //当手指离开的时候 
 x2 = event.getx(); 
 y2 = event.gety(); 
 if(y1 - y2 > 50) { 
 toast.maketext(mainactivity.this, "向上滑", toast.length_short).show(); 
 } else if(y2 - y1 > 50) { 
 toast.maketext(mainactivity.this, "向下滑", toast.length_short).show(); 
 } else if(x1 - x2 > 50) { 
 toast.maketext(mainactivity.this, "向左滑", toast.length_short).show(); 
 } else if(x2 - x1 > 50) { 
 toast.maketext(mainactivity.this, "向右滑", toast.length_short).show(); 
 } 
 } 
 return super.ontouchevent(event); 
 } 

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！