如何在Android中使用okhttp库向api（http post）添加参数

Question

In my Android application, I am using okHttp library. How can I send parameters to the server(api) using the okhttp library? currently I am using the following code to access the server now need to use the okhttp library.

this is the my code:

httpPost = new HttpPost("http://xxx.xxx.xxx.xx/user/login.json");
nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("email".trim(), emailID));
nameValuePairs.add(new BasicNameValuePair("password".trim(), passWord));
httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
String response = new DefaultHttpClient().execute(httpPost, new BasicResponseHandler());

Answer 1

For OkHttp 3.x, FormEncodingBuilder was removed, use FormBody.Builder instead

        RequestBody formBody = new FormBody.Builder()
                .add("email", "Jurassic@Park.com")
                .add("tel", "90301171XX")
                .build();

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(url)
                .post(formBody)
                .build();

        Response response = client.newCall(request).execute();
        return response.body().string();

Answer 2

    private final OkHttpClient client = new OkHttpClient();

      public void run() throws Exception {
        RequestBody formBody = new FormEncodingBuilder()
            .add("email", "Jurassic@Park.com")
            .add("tel", "90301171XX")
            .build();
        Request request = new Request.Builder()
            .url("https://en.wikipedia.org/w/index.php")
            .post(formBody)
            .build();

        Response response = client.newCall(request).execute();
        if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

        System.out.println(response.body().string());
      }

Answer 3

You just need to format the body of the POST before creating the RequestBody object.

You could do this manually, but I'd suggest you use the MimeCraft library from Square (makers of OkHttp).

In this case you'd need the FormEncoding.Builder class; set the contentType to "application/x-www-form-urlencoded" and use add(name, value) for each key-value pair.

Answer 4

None of the answers worked for me, so I played around and below one worked fine. Sharing just in case someone gets stuck with the same issue:

Imports:

import com.squareup.okhttp.MultipartBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;

Code:

OkHttpClient client = new OkHttpClient();
RequestBody requestBody = new MultipartBuilder()
        .type(MultipartBuilder.FORM) //this is what I say in my POSTman (Chrome plugin)
        .addFormDataPart("name", "test")
        .addFormDataPart("quality", "240p")
        .build();
Request request = new Request.Builder()
        .url(myUrl)
        .post(requestBody)
        .build();
try {
    Response response = client.newCall(request).execute();
    String responseString = response.body().string();
    response.body().close();
    // do whatever you need to do with responseString
}
catch (Exception e) {
    e.printStackTrace();
}

Answer 5

Usually to avoid Exceptions brought about by the code running in UI thread, run the request and response process in a worker thread (Thread or Asynch task) depending on the anticipated length of the process.

    private void runInBackround(){

       new Thread(new Runnable() {
            @Override
            public void run() { 
                //method containing process logic.
                makeNetworkRequest(reqUrl);
            }
        }).start();
    }

    private void makeNetworkRequest(String reqUrl) {
       Log.d(TAG, "Booking started: ");
       OkHttpClient httpClient = new OkHttpClient();
       String responseString = "";

       Calendar c = Calendar.getInstance();
       SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       String booked_at = sdf.format(c.getTime());

         try{
             RequestBody body = new FormBody.Builder()
                .add("place_id", id)
                .add("booked_at", booked_at)
                .add("booked_by", user_name.getText().toString())
                .add("booked_from", lat+"::"+lng)
                .add("phone_number", user_phone.getText().toString())
                .build();

        Request request = new Request.Builder()
                .url(reqUrl)
                .post(body)
                .build();

        Response response = httpClient
                .newCall(request)
                .execute();
        responseString =  response.body().string();
        response.body().close();
        Log.d(TAG, "Booking done: " + responseString);

        // Response node is JSON Object
        JSONObject booked = new JSONObject(responseString);
        final String okNo = booked.getJSONArray("added").getJSONObject(0).getString("response");
        Log.d(TAG, "Booking made response: " + okNo);

        runOnUiThread(new Runnable()
        {
            public void run()
            {
                if("OK" == okNo){
                    //display in short period of time
                    Toast.makeText(getApplicationContext(), "Booking Successful", Toast.LENGTH_LONG).show();
                }else{
                    //display in short period of time
                    Toast.makeText(getApplicationContext(), "Booking Not Successful", Toast.LENGTH_LONG).show();
                }
            }
        });

    } catch (MalformedURLException e) {
        Log.e(TAG, "MalformedURLException: " + e.getMessage());
    } catch (ProtocolException e) {
        Log.e(TAG, "ProtocolException: " + e.getMessage());
    } catch (IOException e) {
        Log.e(TAG, "IOException: " + e.getMessage());
    } catch (Exception e) {
        Log.e(TAG, "Exception: " + e.getMessage());
    }

}

I hope it helps someone there.

Answer 6

Another way (without MimeCraft), is to do :

    parameters = "param1=text&param2=" + param2  // for example !
    request = new Request.Builder()
            .url(url + path)
            .post(RequestBody.create(MEDIA_TYPE_MARKDOWN, parameters))
            .build();

and declare :

    public static final MediaType MEDIA_TYPE_MARKDOWN = MediaType.parse("text/x-markdown; charset=utf-8");

Answer 7

(Kotlin version) You would need:

...
val formBody = FormBody.Builder()
    .add("your_key", "your_value")
    .build()
val newRequest: Request.Builder = Request.Builder()
    .url("api_url")
    .addHeader("Content-Type", "application/x-www-form-urlencoded")
    .post(formBody)
...

Then, if you have a nodejs express server with npm body-parser installed, be sure to do following:

var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
...

Answer 8

Kotlin Version:

fun requestData(url: String): String {

    var formBody: RequestBody = FormBody.Builder()
        .add("email", "Jurassic@Park.com")
        .add("tel", "90301171XX")
        .build();

    var client: OkHttpClient = OkHttpClient();
    var request: Request = Request.Builder()
        .url(url)
        .post(formBody)
        .build();

    var response: Response = client.newCall(request).execute();
    return response.body?.toString()!!
}

Answer 9

If you want to send Post data through API using OKHTTP 3 please try below simple code

MediaType MEDIA_TYPE = MediaType.parse("application/json");
        String url = "https://cakeapi.trinitytuts.com/api/add";

        OkHttpClient client = new OkHttpClient();

        JSONObject postdata = new JSONObject();
        try {
            postdata.put("username", "name");
            postdata.put("password", "12345");
        } catch(JSONException e){
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        RequestBody body = RequestBody.create(MEDIA_TYPE, postdata.toString());

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

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                String mMessage = e.getMessage().toString();
                Log.w("failure Response", mMessage);
                //call.cancel();
            }

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

                String mMessage = response.body().string();
                Log.e(TAG, mMessage);
            }
        });

You can read the complete tutorial to send data to server using OKHTTP 3 GET and POST request here:- https://trinitytuts.com/get-and-post-request-using-okhttp-in-android-application/