Intro App: Async Task

AndroidManifest.xml

<!-- This stuff goes inside of your manifest tags -->
    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".ViewPostActivity"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name=".PickPostActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

LoadPostTask.java

public class LoadPostTask extends AsyncTask<Integer, Void, JSONObject> {
  private static final String LOG_TAG = LoadPostTask.class.getSimpleName();
  private TextView titleView;
  private TextView bodyView;

  public LoadPostTask(TextView titleView, TextView bodyView) {
    this.titleView = titleView;
    this.bodyView = bodyView;
  }

  @Override
  protected JSONObject doInBackground(Integer... postId) {
    JSONObject jsonObject = null;
    try {
      URL url = new URL("http://jsonplaceholder.typicode.com/posts/" + postId[0].toString());
      HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
      try {
        InputStream in = new BufferedInputStream(urlConnection.getInputStream());
        jsonObject = readStream(in);
      } catch (Exception e) {
        Log.e(LOG_TAG, "Exception when connecting: "+e.getMessage());
      } finally{
        urlConnection.disconnect();
      }
    } catch (Exception e) {
      Log.e(LOG_TAG, "Exception when parsing: "+e.getMessage());
    }
    return jsonObject;
  }

  public JSONObject readStream(InputStream inputStream) throws Exception {
    BufferedReader streamReader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
    StringBuilder responseStrBuilder = new StringBuilder();

    String inputStr;
    while ((inputStr = streamReader.readLine()) != null) {
      responseStrBuilder.append(inputStr);
    }
    return new JSONObject(responseStrBuilder.toString());
  }

  @Override
  protected void onPostExecute(JSONObject jsonObject) {
    super.onPostExecute(jsonObject);
    if (jsonObject == null) {
      return;
    }

    try {
      String titleString = jsonObject.getString("title");
      String bodyString = jsonObject.getString("body");
      titleView.setText(titleString);
      bodyView.setText(bodyString);
    } catch (JSONException e) {
      e.printStackTrace();
    }
  }
}