我有以下代码,将可绘制对象旋转一定程度的 Angular 。
public Drawable rotateDrawable(float angle, Context context)
{
Bitmap arrowBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.generic2rb);
// Create blank bitmap of equal size
Bitmap canvasBitmap = arrowBitmap.copy(Bitmap.Config.ARGB_8888, true);
canvasBitmap.eraseColor(0x00000000);
// Create canvas
Canvas canvas = new Canvas(canvasBitmap);
// Create rotation matrix
Matrix rotateMatrix = new Matrix();
rotateMatrix.setRotate(angle, canvas.getWidth()/2, canvas.getHeight()/2);
//Draw bitmap onto canvas using matrix
canvas.drawBitmap(arrowBitmap, rotateMatrix, null);
return new BitmapDrawable(canvasBitmap);
}
新版SDK指出
BitmapDrawable(canvasBitmap);
不推荐使用。有没有其他选择?
http://developer.android.com/reference/android/graphics/drawable/BitmapDrawable.html
最佳答案
改为这样做:
return new BitmapDrawable(context.getResources(), canvasBitmap);