ImageLoader.java

package com.echo5bravo.govre.UTILS;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

import android.content.ContentResolver;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;

public class ImageLoader {
	
	public static Bitmap loadFromUri( Context context, String uri, int maxW, int maxH ) throws IOException
	{
		final BitmapFactory.Options options = new BitmapFactory.Options();
		Bitmap bitmap = null;
		options.inScaled = false;
		options.inPreferredConfig = Bitmap.Config.RGB_565;
		BufferedInputStream stream = null;
		if ( uri.startsWith( ContentResolver.SCHEME_CONTENT ) || uri.startsWith( ContentResolver.SCHEME_FILE ) ) stream = new BufferedInputStream(
				context.getContentResolver().openInputStream( Uri.parse( uri ) ), 16384 );
		if ( stream != null ) {
			options.inSampleSize = computeSampleSize( stream, maxW, maxH );
			stream = null;
			stream = new BufferedInputStream( context.getContentResolver().openInputStream( Uri.parse( uri ) ), 16384 );
		} else {
			return null;
		}
		options.inDither = false;
		options.inJustDecodeBounds = false;
		options.inPurgeable = true;
		bitmap = BitmapFactory.decodeStream( stream, null, options );
		if ( bitmap != null ) bitmap = BitmapUtils.resizeBitmap( bitmap, maxW, maxH );
		return bitmap;
	}

	private static int computeSampleSize( InputStream stream, int maxW, int maxH )
	{
		BitmapFactory.Options options = new BitmapFactory.Options();
		options.inJustDecodeBounds = true;
		BitmapFactory.decodeStream( stream, null, options );
		double w = options.outWidth;
		double h = options.outHeight;
		int sampleSize = (int)Math.ceil( Math.max( w / maxW, h / maxH ) );
		return sampleSize;
	}
}