FATAL EXCEPTION: AsyncTask #1:java.lang.RuntimeException: An error occured while executing doInBackground()

Issue

I'm trying to translate a language to another language with Microsoft Text Translator API. I already have this working on java, but when I ported it to Android. It gives me this error. It seems to be pointing me out to IOUtils but I think i already added that prerequisite in the Project Structure. Is there anyway to not use the IOUtils though?. Like OutputStream?. It seems that IOUtils is the problem, but IDK. I can't understand the logcat error. :/

my logcat is here:

E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #1
                  java.lang.RuntimeException: An error occured while executing doInBackground()
                      at android.os.AsyncTask$3.done(AsyncTask.java:299)
                      at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
                      at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
                      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
                      at java.util.concurrent.FutureTask.run(FutureTask.java:137)
                      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
                      at java.lang.Thread.run(Thread.java:856)
                   Caused by: java.lang.ExceptionInInitializerError
                      at org.apache.commons.io.IOUtils.write(IOUtils.java:2049)
                      at com.example.joshu.translatorownimplementation.MainActivity.translate(MainActivity.java:101)
                      at com.example.joshu.translatorownimplementation.MainActivity$LongOperation.doInBackground(MainActivity.java:70)
                      at com.example.joshu.translatorownimplementation.MainActivity$LongOperation.doInBackground(MainActivity.java:55)
                      at android.os.AsyncTask$2.call(AsyncTask.java:287)
                      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
                      at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
                      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
                      at java.lang.Thread.run(Thread.java:856) 
                   Caused by: java.lang.NoClassDefFoundError: java.nio.charset.StandardCharsets
                      at org.apache.commons.io.Charsets.<clinit>(Charsets.java:120)
                      at org.apache.commons.io.IOUtils.write(IOUtils.java:2049) 
                      at com.example.joshu.translatorownimplementation.MainActivity.translate(MainActivity.java:101) 
                      at com.example.joshu.translatorownimplementation.MainActivity$LongOperation.doInBackground(MainActivity.java:70) 
                      at com.example.joshu.translatorownimplementation.MainActivity$LongOperation.doInBackground(MainActivity.java:55) 
                      at android.os.AsyncTask$2.call(AsyncTask.java:287) 
                      at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 
                      at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
                      at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 
                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
                      at java.lang.Thread.run(Thread.java:856) 

Here is my Code:

import org.apache.commons.io.IOUtils;

import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import javax.net.ssl.HttpsURLConnection;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class MSTranslateAPI {

   private static String output;

    private static String key = "<MS KEY for Translator API>";


  public static void main(String[] args) throws Exception {
    // TODO: Specify your translation requirements here:
    String fromLang = "en";
    String toLang = "ko";
    String text = "Hello Friend";

    MSTranslateAPI.translate(fromLang, toLang, text);

  }


  public static void translate(String fromLang, String toLang, String text) throws Exception {

     String authenticationUrl = "https://api.cognitive.microsoft.com/sts/v1.0/issueToken";
    HttpsURLConnection authConn = (HttpsURLConnection) new URL(authenticationUrl).openConnection();
    authConn.setDoOutput(true);
    authConn.setRequestMethod("POST");
    authConn.setRequestProperty("Ocp-Apim-Subscription-Key", key);
    IOUtils.write("", authConn.getOutputStream(), "UTF-8");
    String token = IOUtils.toString(authConn.getInputStream(), "UTF-8");
    authConn.disconnect();

    System.out.println("TOKEN: "+token);




    if(authConn.getResponseCode()==200) {
         String appId = URLEncoder.encode("Bearer " + token, "UTF-8");
    String text2 = URLEncoder.encode(text, "UTF-8");
    String from = fromLang;
    String to = toLang;            
    String translatorTextApiUrl ="https://api.microsofttranslator.com/v2/http.svc/GetTranslations?appid="+appId+"&text="+text2+"&from="+from+"&to="+to+"&maxTranslations=5";


    HttpsURLConnection translateConn = (HttpsURLConnection) new URL(translatorTextApiUrl).openConnection();
    translateConn.setRequestMethod("POST");         
    translateConn.setDoOutput(true);
    IOUtils.write("", translateConn.getOutputStream(), "UTF-8");
    String resp = IOUtils.toString(translateConn.getInputStream(), "UTF-8");
    translateConn.disconnect();
    System.out.println(resp+"\n\n");
    }
    else    {

    }






  }



}

Solution

The stacktrace in the logcat message indicates the StandardCharsets class is not available. According to https://developer.android.com/reference/java/nio/charset/StandardCharsets.html, the class is in the android JDK, but requires API version 19 or higher. You could upgrade the android version you target if you want to keep your use of IOUtils.

Answered By - twinklehawk