java - Creating a scaled bitmap with createScaledBitmap in Android

Question

I want to create a scaled bitmap, but I seemingly get a dis-proportional image. It looks like a square while I want to be rectangular.

My code:

Bitmap resizedBitmap = Bitmap.createScaledBitmap(myBitmap, 960, 960, false);

I want the image to have a MAX of 960. How would I do that? Setting width to null doesn't compile. It's probably simple, but I can't wrap my head around it. Thanks

Answer 1

If you already have the original bitmap in memory, you don't need to do the whole process of inJustDecodeBounds, inSampleSize, etc. You just need to figure out what ratio to use and scale accordingly.

final int maxSize = 960;
int outWidth;
int outHeight;
int inWidth = myBitmap.getWidth();
int inHeight = myBitmap.getHeight();
if(inWidth > inHeight){
    outWidth = maxSize;
    outHeight = (inHeight * maxSize) / inWidth; 
} else {
    outHeight = maxSize;
    outWidth = (inWidth * maxSize) / inHeight; 
}

Bitmap resizedBitmap = Bitmap.createScaledBitmap(myBitmap, outWidth, outHeight, false);

If the only use for this image is a scaled version, you're better off using Tobiel's answer, to minimize memory usage.