Android monitoring: slide the screen from top to bottom

Android monitoring: slide the screen from top to bottom

When developing android programs, you sometimes need to monitor the sliding screen of your fingers. When your fingers slide toward the top, bottom, and left, different responses are made. How can this problem be solved?

Using the gesture Monitor provided by Android, you can easily implement it and directly upload the code (tested)

 

Public class CbMainActivity extends Activity implements android. view. gestureDetector. onGestureListener {// defines the GestureDetector detector of the gesture detector instance; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. cb_main); // create a gesture detector = new GestureDetector (this, this);} // send the touch event on the activity to GestureDetector to process public boolean onTouchEvent (MotionEvent me) {return detector. onTouchEvent (me) ;}@ Overridepublic boolean onDown (MotionEvent arg0) {return false;}/*** sliding screen monitoring ***/@ Overridepublic boolean onFling (MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {float minMove = 120; // minimum sliding distance: float minVelocity = 0; // minimum Sliding Speed: float begbeginx = e1.getX (); float endX = e2.getX (); float beginY = e1.getY (); float endY = e2.getY (); if (beginX INX-endX> minMove & Math. abs (velocityX)> minVelocity) {// Toast. makeText (this, velocityX + "left slide", Toast. LENGTH_SHORT ). show ();} else if (endX-beginX> minMove & Math. abs (velocityX)> minVelocity) {// slide right Toast. makeText (this, velocityX + "slide right", Toast. LENGTH_SHORT ). show ();} else if (beginY-endY> minMove & Math. abs (velocityY)> minVelocity) {// slide Toast. makeText (this, velocityX + "slip", Toast. LENGTH_SHORT ). show ();} else if (endY-beginY> minMove & Math. abs (velocityY)> minVelocity) {// decline Toast. makeText (this, velocityX + "decline", Toast. LENGTH_SHORT ). show ();} return false;} @ Overridepublic void onShowPress (MotionEvent arg0) {// TODO Auto-generated method stub} @ Overridepublic boolean onSingleTapUp (MotionEvent arg0) {// TODO Auto-generated method stubreturn false;} @ Overridepublic void onLongPress (MotionEvent arg0) {// TODO Auto-generated method stub} @ Overridepublic boolean onScroll (MotionEvent e1, motionEvent e2, float velocityX, float velocityY) {return false ;}}