Android programming simple to achieve radar scanning effect _android

The example of this article describes the Android programming simple to achieve radar scanning effect. Share to everyone for your reference, specific as follows:

In EoE saw an article about radar scanning, and then looked at, very simple, but think there are many can optimize the place, the following posted out

Package com.example.wave;
Import Android.content.Context;
Import Android.graphics.Canvas;
Import Android.graphics.Color;
Import Android.graphics.Matrix;
Import Android.graphics.Paint;
Import Android.graphics.Paint.Style;
Import Android.graphics.Shader;
Import android.graphics.SweepGradient;
Import Android.util.AttributeSet;
Import Android.widget.FrameLayout;
 public class Radarview extends Framelayout {private int viewsize = 500;
 Private Paint Mpaintline;
 Private Paint Mpaintsector;
 Private Boolean isstart = false;
 Private Scanthread Mthread;
 private int start = 0;
 Private final int paintwidth = 10;
  Public Radarview {Super (context);
 Init ();
  Public Radarview (context, AttributeSet attrs) {Super (context, attrs);
 Init ();
  private void Init () {initpaint ();
  Mthread = new Scanthread ();
 SetBackgroundColor (color.transparent);
  private void Initpaint () {mpaintline = new Paint ();
  Mpaintline.setstrokewidth (Paintwidth); Mpaintline.Setantialias (TRUE);
  Mpaintline.setstyle (Style.stroke);
  Mpaintline.setcolor (0xffff0000);
  Mpaintsector = new Paint ();
  Mpaintsector.setcolor (0X9D00FF00);
 Mpaintsector.setantialias (TRUE);
  public void setviewsize (int size) {this.viewsize = size;
  Mshader = new Sweepgradient (viewsize >> 1, viewsize >> 1, color.transparent, Color.green);
 Setmeasureddimension (Viewsize, viewsize); @Override protected void onmeasure (int widthmeasurespec, int heightmeasurespec) {setmeasureddimension (viewsize, Vie
 Wsize);
  public void Start () {Mthread.start ();
 Isstart = true;
   public void Stop () {if (Isstart) {thread.interrupted ();
  Isstart = false; } private Shader Mshader = new Sweepgradient (viewsize >> 1, viewsize >> 1, color.transparent, Color.green)
 ;
 Private Matrix matrix = new Matrix ();
  @Override protected void OnDraw (Canvas Canvas) {Super.ondraw (Canvas);
  int halfradasize = viewsize >> 1; Canvas.drawcircle (HalfradasiZe, halfradasize, halfradasize >> 1, mpaintline);
  Canvas.drawcircle (Halfradasize, Halfradasize, Halfradasize-(paintwidth >> 1), mpaintline);
  Canvas.drawline (halfradasize, 0, Halfradasize, viewsize, mpaintline);
  Canvas.drawline (0, Halfradasize, viewsize, Halfradasize, mpaintline);
  Mpaintsector.setshader (Mshader);
  Canvas.concat (matrix);
 Canvas.drawcircle (Halfradasize, Halfradasize, Halfradasize-paintwidth, mpaintsector);
  } protected class Scanthread extends Thread {int halfradasize = viewsize >> 1;
    @Override public void Run () {while (Isstart) {start = start + 2;
    Matrix.reset ();
    Matrix.postrotate (Start, halfradasize, halfradasize);
    Postinvalidate ();
    try {thread.sleep (10);
    catch (Interruptedexception e) {e.printstacktrace ();

 }
   }
  }
 }
}

I hope this article will help you with your Android programming.