android调用网易云API搜索下载

首先，需要获取到网易云音乐的API接口，可以在网易云音乐开发者平台申请。然后，可以使用OkHttp库进行网络请求，以下是一个简单的例子：

public class NetEaseMusicAPI {
    private static final String BASE_URL = "http://music.163.com/api";
    private static final String SEARCH_URL = BASE_URL + "/search/get";
    private static final String DOWNLOAD_URL = BASE_URL + "/song/enhance/download/url";
    private static final String USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36";

    public static void search(String keyword, Callback callback) {
        OkHttpClient client = new OkHttpClient();

        Request request = new Request.Builder()
                .url(SEARCH_URL + "?s=" + keyword + "&type=1")
                .addHeader("User-Agent", USER_AGENT)
                .build();

        client.newCall(request).enqueue(callback);
    }

    public static void download(String songId, Callback callback) {
        OkHttpClient client = new OkHttpClient();

        Request request = new Request.Builder()
                .url(DOWNLOAD_URL + "?id=" + songId + "&br=320000")
                .addHeader("User-Agent", USER_AGENT)
                .build();

        client.newCall(request).enqueue(callback);
    }
}

其中，`search`方法用于搜索歌曲，`download`方法用于下载歌曲。这里使用`OkHttpClient`库发起网络请求，并通过`Callback`回调接收响应结果。使用方法如下：

NetEaseMusicAPI.search("周杰伦", new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
        e.printStackTrace();
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        String responseString = response.body().string();
        // 解析响应结果
    }
});

NetEaseMusicAPI.download("123456", new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
        e.printStackTrace();
    }

    @Override
    public void onResponse(Call call, Response response) throws IOException {
        InputStream is = response.body().byteStream();
        // 保存文件
    }
});

注意，需要在AndroidManifest.xml文件中添加网络访问权限：

<uses-permission android:name="android.permission.INTERNET"/>