Android Open Source - api-ai-android-sdk Request Task

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The source code is released under:

Apache License

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Java Source Code

package ai.api;
//w ww. ja v  a 2  s  .c  o  m
 * API.AI Android SDK - client-side libraries for API.AI
 * =================================================
 * Copyright (C) 2014 by Speaktoit, Inc. (
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.

import android.os.AsyncTask;
import android.text.TextUtils;
import android.util.Log;



 * Request task used only to make string request to the AI service and get string as response without decoding it
class RequestTask extends AsyncTask<String, Integer, String> {

    private static final String TAG = RequestTask.class.getName();

    private final URL url;
    private final String accessToken;

    RequestTask(final URL url, final String accessToken) {
        if (url == null) {
            throw new IllegalArgumentException("url must not be null");
        this.url = url;
        this.accessToken = accessToken;


    protected String doInBackground(final String... params) {
        final String payload = params[0];
        if (TextUtils.isEmpty(payload)) {
            throw new IllegalArgumentException("payload argument should not be empty");

        String response = null;
        HttpURLConnection connection = null;

        try {
            connection = (HttpURLConnection) url.openConnection();
            connection.addRequestProperty("Authorization","Bearer " + accessToken);


            final BufferedOutputStream outputStream = new BufferedOutputStream(connection.getOutputStream());
            IOUtils.write(payload, outputStream, Charsets.UTF_8);

            final InputStream inputStream = new BufferedInputStream(connection.getInputStream());
            response = IOUtils.toString(inputStream, Charsets.UTF_8);

            return response;

        } catch (final IOException e) {
            Log.e(TAG, "Can't make request to the Speaktoit AI service. Please, check connection settings and API access token.", e);
        } finally {
            if (connection != null) {

        return null;

Java Source Code List