android - 在通用镜像加载器中访问 protected 镜像

我在需要获取授权来源图像的应用程序中使用通用图像加载器。

到目前为止，我已经使用自己的类扩展了URLConnectionImageDownloader类，并使用自己的实现覆盖了getStreamFromNetwork方法，该实现将URLConnection对象中的授权 header 设置为:

public class authURLConnectionImageDownloader extends URLConnectionImageDownloader {

@Override
public InputStream getStreamFromNetwork(URI imageUri) throws IOException {

    String auth = Base64.encodeToString(("username" + ":"+"psswd").getBytes(), Base64.NO_WRAP);

    URLConnection conn = imageUri.toURL().openConnection();
    conn.setRequestProperty("Authorization", "Basic " + auth);

    conn.setConnectTimeout(DEFAULT_HTTP_CONNECT_TIMEOUT);
    conn.setReadTimeout(DEFAULT_HTTP_READ_TIMEOUT);

    return new FlushedInputStream(new BufferedInputStream(conn.getInputStream(), BUFFER_SIZE));
}

并设置我的ImageLoader ...

imageLoader = ImageLoader.getInstance();

ImageLoaderConfiguration config =  new ImageLoaderConfiguration.Builder(MainActivity.this)
        .imageDownloader(new authURLConnectionImageDownloader())
        .build();

imageLoader.init(config);

到目前为止，我还无法使它正常工作。图像未下载。但更重要的是，我在getStreamFromNetwork()中设置了一个断点，但它从未被击中？我究竟做错了什么？

最佳答案

我是这样实现的:

 byte[] toEncrypt = (username + ":" + password).getBytes();
        String encryptedCredentials = Base64.encodeToString(toEncrypt, Base64.DEFAULT);
        Map<String, String> headers = new HashMap();
        headers.put("Authorization","Basic "+encryptedCredentials);

    DisplayImageOptions defaultOptions = new DisplayImageOptions.Builder()
            ...
            .extraForDownloader(headers)
            .build();

创建自己的ImageDownloader:

public class AuthDownloader extends BaseImageDownloader {

    public AuthDownloader(Context context){
        super(context);
    }

    @Override
    protected HttpURLConnection createConnection(String url, Object extra) throws IOException {
        HttpURLConnection conn = super.createConnection(url, extra);
        Map<String, String> headers = (Map<String, String>) extra;
        if (headers != null) {
            for (Map.Entry<String, String> header : headers.entrySet()) {
                conn.setRequestProperty(header.getKey(), header.getValue());
            }
        }
        return conn;
    }
}

并将其设置为配置:

    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
            .defaultDisplayImageOptions(defaultOptions)
            .discCacheExtraOptions(600, 600, CompressFormat.PNG, 75, null)
            .imageDownloader(new AuthDownloader(getApplicationContext()))
            .build();

    ImageLoader.getInstance().init(config);