在Android視圖中繪製虛線圓圈

Question

我需要在視圖中顯示虛線圓圈。

Answer 1

嘗試這種解決方案：

public void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 

      setContentView(demoview); 
     } 

     private class DemoView extends View{ 
      public DemoView(Context context){ 
       super(context); 
      } 

      @Override 
      protected void onDraw(Canvas canvas) { 
       super.onDraw(canvas); 
       Paint p = new Paint(); 
       p.setColor(Color.RED); 
       DashPathEffect dashPath = new DashPathEffect(new float[]{5,5}, (float)1.0); 

       p.setPathEffect(dashPath); 
       p.setStyle(Style.STROKE); 
       canvas.drawCircle(100, 100, 50, p); 

       invalidate(); 
      } 
     } 
}