Options opts = new BitmapFactory.Options();
    BufferedInputStream bis = new BufferedInputStream(pis);
    bis.mark(1024 * 1024);
    opts.inJustDecodeBounds = true;
    Bitmap bmImg=BitmapFactory.decodeStream(bis,null,opts);

    Log.e("optwidth",opts.outWidth+"");
    try {
        bis.reset();
        opts.inJustDecodeBounds = false;
        int ratio = opts.outWidth/800;
        Log.e("ratio",String.valueOf(ratio));
        if (opts.outWidth>=800)opts.inSampleSize = ratio;

        return BitmapFactory.decodeStream(bis,null,opts);

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return null;
    }

File photos= new File("imageFilePath that you select");
Bitmap b = decodeFile(photos);

private Bitmap decodeFile(File f){
        try {
            //decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            BitmapFactory.decodeStream(new FileInputStream(f),null,o);

            //Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE=70;
            int width_tmp=o.outWidth, height_tmp=o.outHeight;
            int scale=1;
            while(true){
                if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
                    break;
                width_tmp/=2;
                height_tmp/=2;
                scale++;
            }

            //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;
    }

ImageView img = (ImageView)findViewById(R.id.sdcardimage);
img.setImageBitmap(b);