Sliding left in Activity to return listening

NetEase News has a cool effect. It also has this effect when QQ enters the chat interface, that is, when sliding from the left side of the interface to the right side, the interface exits, in fact, the function is easy to implement:

1)

Implement implements OnTouchListener by Activity

 

2) implement the onTouch method:

/**
* Sliding left to return listening
*/
@ Override
Public boolean onTouch (View v, MotionEvent event ){
Switch (event. getAction ()){
Case MotionEvent. ACTION_DOWN:
StartX = event. getX ();
StartY = event. getY ();
Break;
Case MotionEvent. ACTION_UP:
Float endX = event. getX ();
Float endY = event. getY ();
If (Math. abs (endX-startX)> 150 & (endY-startY) = 0 | Math. abs (endX-startX)/(endY-startY)> 2 )){
Finish ();
}
Break;
Default:
Break;
}
Return false;
}

 

Sliding left in Activity to return listening