Android BitmapHelper

BitmapHelper.java

import java.io.InputStream;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class BitmapHelper {

	public static int calculateInSampleSize(BitmapFactory.Options options,int reqWidth, int reqHeight) {
		// Raw height and width of image
		final int height = options.outHeight;
		final int width = options.outWidth;
		int inSampleSize = 1;

		if (height > reqHeight || width > reqWidth) {
			if (width > height) {
				inSampleSize = Math.round((float) height / (float) reqHeight);
			} else {
				inSampleSize = Math.round((float) width / (float) reqWidth);
			}
		}
		return inSampleSize;
	}
	
	public static Bitmap decodeSampledBitmapFromInputStream(InputStream is ,int reqWidth, int reqHeight) {
	    // First decode with inJustDecodeBounds=true to check dimensions
	    final BitmapFactory.Options options = new BitmapFactory.Options();
	    options.inJustDecodeBounds = true;
	    BitmapFactory.decodeStream(is, null, options);

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

	    // Decode bitmap with inSampleSize set
	    options.inJustDecodeBounds = false;
	    return BitmapFactory.decodeStream(is, null, options);
	}

}