save and retreive image in android

URL url = new URL ("file://some/path/anImage.png");
InputStream input = url.openStream();
try {
    OutputStream output = new FileOutputStream ("/sdcard/myImage.png");
    try {
        byte[] buffer = new byte[aReasonableSize];
        int bytesRead = 0;
        while ((bytesRead = input.read(buffer, 0, buffer.length)) >= 0) {
            output.write(buffer, 0, bytesRead);
        }
    } finally {
        output.close();
    }
} finally {
    input.close();
}