如何畫圓。How to draw a Circle.

GreenCup

如何畫圓。
How to draw a Circle.

1. private Context context;
   
2.     public FrameLayout fLayout;
   
3.     private Canvas g;

複製代碼

1. Display display = _context.getDisplay();
   
2. 
   
3.         int width = display.getHeight();
   
4.         int height = display.getWidth();
   
5. 
   
6.         Bitmap bitmap = Bitmap.createBitmap(height, height, Bitmap.Config.RGB_565);
   
7. 
   
8.         g = new Canvas(bitmap);
   
9.         g.drawColor(Color.WHITE);
   
10.         g.drawBitmap(bitmap, 0F, 0F, null);
    
11. 
    
12.         Paint paint = new Paint();
    
13. 
    
14.         paint.setAntiAlias(true);
    
15.         paint.setDither(true);
    
16.         paint.setColor(Color.BLUE);
    
17.         paint.setStyle(Paint.Style.FILL);
    
18.         paint.setStrokeJoin(Paint.Join.ROUND);
    
19.         paint.setStrokeCap(Paint.Cap.ROUND);
    
20.         paint.setAlpha(0xff);
    
21.         paint.setStrokeWidth(1);
    
22. 
    
23.         g.drawCircle(height/2, height/2, height/2, paint); //Put your values
    
24. 
    
25.         // In order to display this image, we need to create a new ImageView that we can display.
    
26.         ImageView imageView = new ImageView(_context);
    
27. 
    
28.         // Set this ImageView's bitmap to ours
    
29.         imageView.setImageBitmap(bitmap);
    
30. 
    
31.         fLayout.addView(imageView);

複製代碼