个回答

• qq_Faraward_0

  2017-08-10 11:43:53

  drawable没法旋转，得用bitmap
  Matrix matrix = new Matrix();
          matrix.setRotate(-360 *mmProgress,baseBitmap.getWidth()/2,baseBitmap.getHeight()/2);//步骤2
          System.out.println("TouchPullViewc:"+360 *mProgress );
  
          matrix.postTranslate(mCirclePointX-baseBitmap.getWidth()/2,mCirclePointY-baseBitmap.getHeight()/2);//步骤3  屏幕的中心点
          canvas.drawBitmap(baseBitmap, matrix, null);//步骤4

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• IT小男生

  2017-08-04 13:35:50

  Drawable drawable=mContent;
  if (drawable!=null){
     canvas.save();
  
     //剪切矩形区域
     canvas.clipRect(drawable.getBounds());
     canvas.rotate(mRotate,mCirclePointX,mCirclePointY);
     drawable.draw(canvas);
  }
  

  canvas的rotate(float,float,float)方法是旋转画布 

  第一个参数：旋转角度（0~无穷）

  第二个参数：旋转中心点x坐标

  第三个参数：旋转中心点y坐标

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