ImageDecoder.java

package in.co.praveenkumar.mdroid.helper;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class ImageDecoder {

	/**
	 * Decodes the image as a bitmap
	 * 
	 * @param f
	 *            Path to the image file
	 * @return Bitmap of the decoded image
	 */
	public static Bitmap decodeImage(File f) {
		try {
			// Decode image size
			BitmapFactory.Options o = new BitmapFactory.Options();
			o.inJustDecodeBounds = true;
			BitmapFactory.decodeStream(new FileInputStream(f), null, o);

			// The new size we want to scale to
			final int REQUIRED_SIZE = 70;

			// Find the correct scale value. It should be the power of 2.
			int scale = 1;
			while (o.outWidth / scale / 2 >= REQUIRED_SIZE
					&& o.outHeight / scale / 2 >= REQUIRED_SIZE)
				scale *= 2;

			// Decode with inSampleSize
			BitmapFactory.Options o2 = new BitmapFactory.Options();
			o2.inSampleSize = scale;
			return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
		} catch (FileNotFoundException e) {
		}
		return null;
	}

}