Bitmap.compress Results In Too Large Of File

I have an app that needs to resize an image and then save it to jpg. My test image is a photo with very smooth gradients in the sky. I'm trying to save it to jpeg after a resize

Solution 1:

Try this code from http://developer.android.com/training/displaying-bitmaps/load-bitmap.html

In short, you have 2 static methods

the first for calculating the new size of the image

publicstaticintcalculateInSampleSize(
        BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of imagefinalintheight= options.outHeight;
finalintwidth= options.outWidth;
intinSampleSize=1;

if (height > reqHeight || width > reqWidth) {

    // Calculate ratios of height and width to requested height and widthfinalintheightRatio= Math.round((float) height / (float) reqHeight);
    finalintwidthRatio= Math.round((float) width / (float) reqWidth);

    // Choose the smallest ratio as inSampleSize value, this will guarantee// a final image with both dimensions larger than or equal to the// requested height and width.
    inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}

return inSampleSize;
}

second for loading the scaled size image into memory:

publicstatic Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
    int reqWidth, int reqHeight) {

// First decode with inJustDecodeBounds=true to check dimensionsfinal BitmapFactory.Optionsoptions=newBitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(res, resId, options);

// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(res, resId, options);
}

and You can call this function like this:

Bitmapb= decodeSampledBitmapFromResource(getResources(), R.id.myimage, 128, 128));

You can modify the second method to take input parametar String (the path if the image is file on sdcard) instead of resource, and instead of decodeResource use:

BitmapFactory.decodeFile(path, options);

I always use this code when loading big images.