我有一个有圆形视图的方形图像,我使用下面的代码使用画布在圆心绘制该图像:
Bitmap bitmapCompass = BitmapFactory.decodeResource(getResources(), R.drawable.compass_rim);
float w2= (w-bitmapCompass.getWidth())/2;
float h2= (h-bitmapCompass.getHeight())/2;
canvas.drawBitmap(bitmapCompass, w2, h2, paint);
我想将此图像像拨号器相对于center.Facing问题旋转,以使图像围绕该圆心旋转。
用于轮换的代码:
Bitmap bitmapCompass = BitmapFactory.decodeResource(getResources(), R.drawable.compass_back);
float w2= (w-bitmapCompass.getWidth())/2;
float h2= (h-bitmapCompass.getHeight())/2;
Matrix matbitmapCompass = new Matrix();
matbitmapCompass.postRotate((float)90);
Bitmap bmpRotateCompass = Bitmap.createBitmap(bitmapCompass, 0,0, bitmapCompass.getWidth(), bitmapCompass.getHeight(), matbitmapCompass, true);
canvas.drawBitmap(bmpRotateCompass, w2, h2, paint);
帮助将不胜感激。
由于
答案 0 :(得分:1)
我想你想要旋转画布:
canvas.save();
canvas.rotate(angle, rotationCenterX, rotationCenterY);
// draw here
canvas.restore();