Question

以前没有探索过OkHttp，使用AsyncTask进行的网络通话目前可以正常工作，但出于其他要求，希望切换到OkHttp

这是我使用AsyncTask进行网络通话的方式：

   private class HTTPAsyncTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... urls) {
        // params comes from the execute() call: params[0] is the url.
        try {
            try {
                return HttpPost(urls[0]);
            } catch(Exception e) {
                e.printStackTrace();
                return "Error!";
            }
        } catch (Exception e) {
            return "Unable to retrieve web page. URL may be invalid.";
        }
    }
    // onPostExecute displays the results of the AsyncTask.
    @Override
    protected void onPostExecute(String result) {
        Log.d("data is being sent",result);
    }
}
private String HttpPost(String myUrl) throws IOException {
    String result = "";

    URL url = new URL(myUrl);

    // 1. create HttpURLConnection
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("POST");
    conn.setRequestProperty("Content-Type", "application/json; charset=utf-8");
    OutputStream os = conn.getOutputStream();
    BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
    writer.write(StringData);
    writer.flush();
    writer.close();
    os.close();

    // 4. make POST request to the given URL
    conn.connect();

    // 5. return response message
    return conn.getResponseMessage()+"";

}

现在，如何使用POST进行相同的OkHttp调用，这就是我的位置：

private void makeNetworkCall()
{
    OkHttpClient client=new OkHttpClient();
    Request request=new Request.Builder().url(post_url).build();

    client.newCall(request).enqueue(new Callback() {
        @Override
        public void onFailure(Call call, final IOException e)
        {

            Log.e(getClass().getSimpleName(), "Exception parsing JSON", e);
        }

        @Override
        public void onResponse(Call call, Response response) throws IOException {

            Log.e("TAG","SUCCESS");
        }
    });
}

但是，不确定如何使用OkHttp方式传递数据，我们将不胜感激。感谢您。

Answer 1

诚实，我什至不会打扰普通的OkHttp Retrofit，它是您选择的工具，它用途广泛（甚至支持类似Rx的样式），并且减轻了许多您必须处理的低级内容现在。

要进一步提高技能，请看this

Answer 2

我同意这样的答案，从长远来看，如果计划对后端进行许多不同的网络调用，则从长远来看翻新会更好。但是，如果您坚持在较低级别使用OkHttp，则可以执行以下操作：

String jsonString = json.toString();
RequestBody body = RequestBody.create(JSON, jsonString);

Request request = new Request.Builder()
    .header("Content-Type", "application/json; charset=utf-8")
    .url(post_url)
    .post(body)
    .build();

client.newCall(request).enqueue(new com.squareup.okhttp.Callback() {
    @Override
    public void onFailure(Request request, IOException throwable) {

    }

    @Override
    public void onResponse(Response response) throws IOException {

    }
});

如何从AsyncTask切换到OkHTTP，理想的方法？

2 个答案: