Android detects right-sliding webview

Today's products have to be right-sliding .... Detection to the right slip gesture after the event does not do processing in the activity to do the corresponding processing.

Import Android.app.activity;import Android.content.context;import Android.util.attributeset;import Android.view.motionevent;import Android.view.velocitytracker;import Android.view.view;import Android.view.view.ontouchlistener;import Android.webkit.websettings;import Android.webkit.websettings.renderpriority;import Android.webkit.webview;public class MyWebView extends WebView {//            The minimum speed when the finger is sliding to the right private static final int xspeed_min = 200;            The minimum distance when the finger is sliding to the right private static final int xdistance_min = 150;      Record the horizontal axis of the finger when it is pressed.            private float Xdown; Record the horizontal axis of the finger when moving.
      private float Xmove;      Used to calculate the speed of finger slippage.    Private Velocitytracker Mvelocitytracker; Context Mcontext;public Mywebview (context context) {super (context); this.mcontext = Context;init ();} Public Mywebview (context context, AttributeSet Attrs) {Super (context, attrs); this.mcontext = Context;init ();} Public Mywebview (context context, AttributeSet attrs, int defstyle) {Super (context, attrs, defstyle); this.mcontext = cont Ext;init ();} private void Init () {setscrollbarstyle (0);//sets the width of the scroll bar websettings websettings = GetSettings (); Websettings.setjavascriptenabled (True); Websettings.setsaveformdata (false); Websettings.setsavepassword (false); Websettings.setsupportzoom (false); websettings.setgeolocationenabled (true); Websettings.setrenderpriority ( Renderpriority.high); Websettings.setsupportmultiplewindows (true); Websettings.setloadsimagesautomatically (True) ; Websettings.setusewideviewport (true);}  @Override public boolean ontouchevent (Motionevent event) {Createvelocitytracker (event);        Switch (event.getaction ()) {Case MotionEvent.ACTION_DOWN:xDown = event.getrawx ();          Break              Case MotionEvent.ACTION_MOVE:xMove = EVENT.GETRAWX ();              The distance of the activity int DISTANCEX = (int) (xmove-xdown);              Get time-of-speed int xspeed = getscrollvelocity ();  When the sliding distance is greater than the minimum distance we set and the instantaneous speed of the slide is greater than the speed we set, return to the previous activity//if (Distancex > Xdistance_min && xspeed >            Xspeed_min) {if (Distancex > Xdistance_min) {return false;          } break;              Case MotionEvent.ACTION_UP:recycleVelocityTracker ();          Break          Default:break;      } return Super.ontouchevent (event); }/** * Create Velocitytracker object.      and add the sliding events of the touch content interface to Velocitytracker. * * @param event * */private void Createvelocitytracker (Motionevent event) {          if (Mvelocitytracker = = null) {Mvelocitytracker = Velocitytracker.obtain ();      } mvelocitytracker.addmovement (event);      }/** * Reclaims Velocitytracker objects.          */private void Recyclevelocitytracker () {mvelocitytracker.recycle ();      Mvelocitytracker = null;      /** * Gets the speed at which the finger slides in the content interface.      * * @return sliding speed, in units of how many pixel values are moved per second.          */private int getscrollvelocity () {mvelocitytracker.computecurrentvelocity (1000);          int velocity = (int) mvelocitytracker.getxvelocity ();      return math.abs (velocity); }}

Android detects right-sliding webview