/**
* bitmap 图片缩放到指定大小
*/
public static Bitmap resizeImage(Bitmap bitmap, int w, int h)
{
Bitmap BitmapOrg = bitmap;
int width = BitmapOrg.getWidth();
int height = BitmapOrg.getHeight();
int newWidth = w;
int newHeight = h;
float scaleWidth = ((float)newWidth) / width;
float scaleHeight = ((float)newHeight) / height;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
// if you want to rotate the Bitmap
// matrix.postRotate(45);
Bitmap resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width, height, matrix, true);
return resizedBitmap;
}
/**
* 把一张图放到另一张背景图上。
*/
public static Drawable addbackground4onlyicon(Bitmap b1, Bitmap b2,Context mContext)
{
if (!b1.isMutable())
{
// 设置图片为背景为透明
b1 = b1.copy(Bitmap.Config.ARGB_8888, true);
}
Paint paint = new Paint();
Canvas canvas = new Canvas(b1);
canvas.drawBitmap(b2, 17.5f, 17.5f, paint);// 叠加新图b2 (120-85)/2= 17.5
canvas.save(Canvas.ALL_SAVE_FLAG);
canvas.restore();
return new BitmapDrawable(mContext.getResources(), b1);
}