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把一张图缩小放到另一张背景图上。，一张背景图
/** * 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); }