Android bitmap圖片處理

　　public static Bitmap zoomBitmap(Bitmap bitmap,int w,int h){

　　int width = bitmap.getWidth();

　　int height = bitmap.getHeight();

　　Matrix matrix = new Matrix();

　　float scaleWidht = ((float)w / width);

　　float scaleHeight = ((float)h / height);

　　matrix.postScale(scaleWidht, scaleHeight);

　　Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);

　　return newbmp;

　　}

　　//將Drawable轉化為Bitmap

　　public static Bitmap drawableToBitmap(Drawable drawable){

　　int width = drawable.getIntrinsicWidth();

　　int height = drawable.getIntrinsicHeight();

　　Bitmap bitmap = Bitmap.createBitmap(width, height,

　　drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888

　　: Bitmap.Config.RGB_565);

　　Canvas canvas = new Canvas(bitmap);

　　drawable.setBounds(0,0,width,height);

　　drawable.draw(canvas);

　　return bitmap;

　　}