在Android系統中縮放圖片的代碼

public static Drawable resizeImage(Bitmap bitmap, int w, int h) {


            // load the origial Bitmap
            Bitmap BitmapOrg = bitmap;

            int width = BitmapOrg.getWidth();
            int height = BitmapOrg.getHeight();
            int newWidth = w;
            int newHeight = h;

            // calculate the scale
            float scaleWidth = ((float) newWidth) / width;
            float scaleHeight = ((float) newHeight) / height;

            // create a matrix for the manipulation
            Matrix matrix = new Matrix();
            // resize the Bitmap
            matrix.postScale(scaleWidth, scaleHeight);
            // if you want to rotate the Bitmap
            // matrix.postRotate(45);

            // recreate the new Bitmap
            Bitmap resizedBitmap = Bitmap.createBitmap(BitmapOrg, 0, 0, width,
                            height, matrix, true);

            // make a Drawable from Bitmap to allow to set the Bitmap
            // to the ImageView, ImageButton or what ever
            return new BitmapDrawable(resizedBitmap);

    }</pre>