POSTing JSON/XML using android-async-http (loopj)

问题:

I am using android-async-http and really liking it. I've run into a problem with POSTing data. I have to post data to the API in the following format: -

<request>
  <notes>Test api support</notes>
  <hours>3</hours>
  <project_id type="integer">3</project_id>
  <task_id type="integer">14</task_id>
  <spent_at type="date">Tue, 17 Oct 2006</spent_at>
</request>

As per the documentation, I tried doing it using RequestParams, but it is failing. Is this any other way to do it? I can POST equivalent JSON too. Any ideas?

回答1:

Loopj POST examples - extended from their Twitter example:

private static AsyncHttpClient client = new AsyncHttpClient();

To post normally via RequestParams:

RequestParams params = new RequestParams();
params.put("notes", "Test api support"); 
client.post(restApiUrl, params, responseHandler);

To post JSON:

JSONObject jsonParams = new JSONObject();
jsonParams.put("notes", "Test api support");
StringEntity entity = new StringEntity(jsonParams.toString());
client.post(context, restApiUrl, entity, "application/json",
    responseHandler);

回答2:

@Timothy answer did not work for me.

I defined the Content-Type of the StringEntity to make it work:

JSONObject jsonParams = new JSONObject();
jsonParams.put("notes", "Test api support");

StringEntity entity = new StringEntity(jsonParams.toString());
entity.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));

client.post(context, restApiUrl, entity, "application/json", responseHandler);

Good Luck :)

回答3:

a better way to post json

RequestParams params = new RequestParams();
    params.put("id", propertyID);
    params.put("lt", newPoint.latitude);
    params.put("lg", newPoint.longitude);
    params.setUseJsonStreamer(true);

    ScaanRestClient restClient = new ScaanRestClient(getApplicationContext());
    restClient.post("/api-builtin/properties/v1.0/edit/location/", params, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
        }

        @Override
        public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
        }
    });

回答4:

To post XML

protected void makePost() {
    AsyncHttpClient client = new AsyncHttpClient();
    Context context = this.getApplicationContext();
    String  url = URL_String;
    String  xml = XML-String;
    HttpEntity entity;
    try {
        entity = new StringEntity(xml, "UTF-8");
    } catch (IllegalArgumentException e) {
        Log.d("HTTP", "StringEntity: IllegalArgumentException");
        return;
    } catch (UnsupportedEncodingException e) {
        Log.d("HTTP", "StringEntity: UnsupportedEncodingException");
        return;
    }
    String  contentType = "string/xml;UTF-8";

    Log.d("HTTP", "Post...");
    client.post( context, url, entity, contentType, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(String response) {
            Log.d("HTTP", "onSuccess: " + response);
        }
          ... other handlers
    });
}

回答5:

just write your xml or json to a string and send to server, with proper headers or without. and yes set "Content-Type" to "application/json"

回答6:

If someone have a problem that httpclient send as Content-Type: text/plain, please refer this link: https://stackoverflow.com/a/26425401/361100

The loopj httpclient is somewhat changed (or has problem) which cannot override StringEntity native Content-Type to application/json.

回答7:

You can add the JSON string as an InputStream of some kind - I've used the ByteArrayStream, then passing it to the RequestParams you should set the correctMimeType

InputStream stream = new ByteArrayInputStream(jsonParams.toString().getBytes(Charset.forName("UTF-8")));
multiPartEntity.put("model", stream, "parameters", Constants.MIME_TYPE_JSON);

回答8:

Just make JSONObject and then convert it to String "someData" and simply send with "ByteArrayEntity"

    private static AsyncHttpClient client = new AsyncHttpClient();
    String someData;
    ByteArrayEntity be = new ByteArrayEntity(someData.toString().getBytes());
    client.post(context, url, be, "application/json", responseHandler);

It is working fine for me.

回答9:

To post xml file to a php server :

public class MainActivity extends AppCompatActivity {

/**
 * Send xml file to server via asynchttpclient lib
 */

Button button;
String url = "http://xxx/index.php";
String filePath = Environment.getExternalStorageDirectory()+"/Download/testUpload.xml";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = (Button)findViewById(R.id.button);

    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            postFile();
        }
    });
}

public void postFile(){

    Log.i("xml","Sending... ");

    RequestParams params = new RequestParams();

    try {
        params.put("key",new File(filePath));
    }catch (FileNotFoundException e){
        e.printStackTrace();
    }

    AsyncHttpClient client = new AsyncHttpClient();

    client.post(url, params, new AsyncHttpResponseHandler() {
        @Override
        public void onSuccess(int i, cz.msebera.android.httpclient.Header[] headers, byte[] bytes) {
            Log.i("xml","StatusCode : "+i);
        }

        @Override
        public void onFailure(int i, cz.msebera.android.httpclient.Header[] headers, byte[] bytes, Throwable throwable) {
            Log.i("xml","Sending failed");
        }

        @Override
        public void onProgress(long bytesWritten, long totalSize) {
            Log.i("xml","Progress : "+bytesWritten);
        }
    });
}

}

After adding android-async-http-1.4.9.jar to android studio, go to build.gradle and add : compile 'com.loopj.android:android-async-http:1.4.9' under dependencies

And on AndroidManifest.xml add:

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