Android Picasso库中如何添加验证头文件?

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是否有像Retrofit这样的请求拦截器?或者我错过了OkHttpClient的东西?

我正在使用最新版本:

compile 'com.squareup.picasso:picasso:2.3.2'
compile 'com.squareup.okhttp:okhttp:2.0.+'
compile 'com.squareup.okhttp:okhttp-urlconnection:2.0.+'
compile 'com.squareup.okio:okio:1.0.0'
提问于
用户回答回答于

你使用的是OkHttp3,所以你必须执行以下操作:

OkHttpClient client = new OkHttpClient.Builder()
        .addInterceptor(new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request newRequest = chain.request().newBuilder()
                        .addHeader("X-TOKEN", "VAL")
                        .build();
                return chain.proceed(newRequest);
            }
        })
        .build();

Picasso picasso = new Picasso.Builder(context)
        .downloader(new OkHttp3Downloader(client))
        .build();

用户回答回答于

你可以像这样的东西可以完成设置API密钥头部的工作:

public class CustomPicasso {

    private static Picasso sPicasso;

    private CustomPicasso() {
    }

    public static Picasso getImageLoader(final Context context) {
        if (sPicasso == null) {
            Picasso.Builder builder = new Picasso.Builder(context);
            builder.downloader(new CustomOkHttpDownloader());
            sPicasso = builder.build();
        }
        return sPicasso;
    }

    private static class CustomOkHttpDownloader extends OkHttpDownloader {

        @Override
        protected HttpURLConnection openConnection(final Uri uri) throws IOException {
            HttpURLConnection connection = super.openConnection(uri);
            connection.setRequestProperty(Constants.HEADER_X_API_KEY, "MY_API_KEY");
            return connection;
        }
    }
}

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