How to execute multiple functions at the same time in an AsyncTask?

Question

I have an asyncTask Class which is called whenever the user taps a "Send" button from an AppCompatActivity. In the doInBackground method of my AsyncTask, I translate a string into 30 languages using Google Translate API. The problem is, it takes some time for each string to be translated into each language. I feel like it would be a better approach to run all of these functions at the same time by multithreading.

Each time a try and catch is its own set of instructions to translate a string into 1 language. This approach is too slow.

Here is my doInBackground Function:

 @Override
protected Void doInBackground(Void... voids) {

    translate = TranslateOptions.newBuilder().setApiKey("GOOGLE_API_KEY").build().getService();

     /*ENGLISH TO ARABIC*/     

    try {
                Translation translation =
                        translate.translate(
                                MY_STRING,
                                Translate.TranslateOption.sourceLanguage("en"),
                                Translate.TranslateOption.targetLanguage("ar"));
                parseObject.put("data0", translation.getTranslatedText());

            } catch (Exception e) {
                parseObject.put("data0", MY_STRING + " " + mContext.getString(R.string.translationfailed));

            }

      /*English to Chinese*/
 try {
                Translation
                        translation =
                        translate.translate(
                                MY_STRING,
                                Translate.TranslateOption.sourceLanguage("en"),
                                Translate.TranslateOption.targetLanguage("zh-CN"));
                parseObject.put("data1", translation.getTranslatedText());

            } catch (Exception e) {
                parseObject.put("data1", MY_STRING + " " + mContext.getString(R.string.translationfailed));

            }

  /*28 More languages run...*/

 /*Then, Save Data into server*/

  parseObject.saveinBackground();

    return null;
}

Try this link : http://stackoverflow.com/questions/4068984/running-multiple-asynctasks-at-the-same-time-not-possible — Abdeldjalil Elaaeieida, Mar 02 '17 at 14:56

score 2 · Accepted Answer · edited May 23 '17 at 12:31

2

You need to use Multi Thread. AsyncTask is good for Short time & light operation. read this tutorial

download and test sample code.

also you can run one AsyncTask and Pass same parameters for each lanuage. but for multiple AsyncTask

class doSomethingInBack extends AsyncTask(String, String, String){}

See this Question

this is Thread Sample class PhotoDecodeRunnable implements Runnable { /* * Defines the code to run for this task. */ @Override public void run() { // Moves the current Thread into the background android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);

/*
* Stores the current Thread in the PhotoTask instance,
*  that the instance
* can interrupt the Thread.
*/
try {
Translation translation =
translate.translate(
MY_STRING,
Translate.TranslateOption.sourceLanguage("en"),
Translate.TranslateOption.targetLanguage("ar"));
parseObject.put("data0", translation.getTranslatedText());
} catch (Exception e) {
parseObject.put("data0", MY_STRING + " " + mContext.getString(R.string.translationfailed));
}

/*English to Chinese*/
 try {
Translation
translation =
translate.translate(
MY_STRING,
Translate.TranslateOption.sourceLanguage("en"),
Translate.TranslateOption.targetLanguage("zh-CN"));
parseObject.put("data1", translation.getTranslatedText());
} catch (Exception e) {
parseObject.put("data1", MY_STRING + " " + mContext.getString(R.string.translationfailed));
}

}
}

edited May 23 '17 at 12:31

Community

1
1

answered Mar 01 '17 at 04:38

Elias Fazel

2,093
16
20

This link is broken for me. – grantespo Mar 01 '17 at 04:39
this one https://developer.android.com/training/multiple-threads/index.html – Elias Fazel Mar 01 '17 at 04:40
This is exactly what I was looking for. I will mark accepted answer if you provide example code for me for my situation. – grantespo Mar 01 '17 at 04:41
copy and paste all your try{}catch(){} functions to thread it s super easy @grant – Elias Fazel Mar 01 '17 at 04:42
Please give me an example. – grantespo Mar 01 '17 at 04:43
Do I put all of my try{}calc{} functions in 1 thread or does each one get its own thread? @Elias Fazel – grantespo Mar 01 '17 at 04:49
check my new solution >> pass data to Async. it means run AsynTask multiple time with different value. this might be easier to implement @grant – Elias Fazel Mar 01 '17 at 04:54

score 0 · Answer 2 · answered Mar 02 '17 at 15:17

0

Check this answer:

ParserTask parserTask = new ParserTask();
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
        parserTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, result);
    }else{
        parserTask.execute(result);
    }

answered Mar 02 '17 at 15:17

Abdeldjalil Elaaeieida

79
10

What dis this do? And where do I put my functions? – grantespo Mar 02 '17 at 17:28
Allows you to run multiple tasks at the same time/ put the code when u call methode asyncTask.execute. In my exemple parserTask is the instance of Class extends AsyncTask – Abdeldjalil Elaaeieida Mar 02 '17 at 18:01

How to execute multiple functions at the same time in an AsyncTask?

2 Answers2