content: package com.google.zxing.common;
  
  import android.content.res.Resources;
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  
  public class BitmapUtils {
  
  	public static Bitmap decodeSampledBitmapFromResource(Resources res,
  			int resId, int reqWidth, int reqHeight) {
  
  		// First decode with inJustDecodeBounds=true to check dimensions
  		final BitmapFactory.Options options = new BitmapFactory.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);
  	}
  
  	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) {
  
  			// Calculate ratios of height and width to requested height and
  			// width
  			final int heightRatio = Math.round((float) height
  					/ (float) reqHeight);
  			final int widthRatio = 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;
  	}
  
  	public static Bitmap getCompressedBitmap(String path) {
  		BitmapFactory.Options options = new BitmapFactory.Options();
  		options.inJustDecodeBounds = true;
  		BitmapFactory.decodeFile(path, options);
  		options.inSampleSize = calculateInSampleSize(options, 480, 800);
  		options.inJustDecodeBounds = false;
  		return BitmapFactory.decodeFile(path, options);
  	}
  }
  