i have made simple application which load image in canvas scale it
according to screen height and width and after that user can write and
draw something on it using his finger and once user complete its
drawing. He should be able to save it. But i have to save the image as
same width and height as original image.(not according to phone screen
size). So i am scaling the image to its original height and width. But
it is only able to scale if i use Bitmap type Bitmap.Config.RGB_565 as
it uses law memory(but very poor quality). For others type like
Bitmap.Config.ALPHA_8, Bitmap.Config.ARGB_8888 it is giving
MemoryOutOfException. The code to re size image to its original width
and height is as follow.
public Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth)
{
int width = bm.getWidth();
int height = bm.getHeight();
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// recreate the new Bitmap
BitmapFactory.Options options = new BitmapFactory.Options();
options.inTempStorage = new byte[16*1024];
//bm.
//BitmapFactory.decodeByteArray(bm.getRowBytes(), 0, length,
opts)
Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width,
height,
matrix, false);
// return Bitmap.createScaledBitmap(bm, newWidth, newHeight,
true);
return resizedBitmap;
}
The following is code to create blank bitmap on which i draw the
content which is in my view and then i try to resize it.
Bitmap b = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
Bitmap.Config.RGB_565);
The main problem with Bitmap.Config.RGB_565 is the quality of image is
very poor compare to original image which has very good quality. so i
want to use Bitmap.Config.ARGB_8888 if possible. any suggestion and
advise is more then welcome.
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