Modify an AsyncTask method using a not deprecated module

Question

I have this method that is using the deprecated module AsyncTask:

private void createNewNote() {
        AsyncTask<ContentValues, Void, Uri> task = new AsyncTask<ContentValues, Void, Uri>() {
            @Override
            protected Uri doInBackground(ContentValues... params) {
               ContentValues insertValues = params[0];
               Uri rowUri = getContentResolver().insert(Notes.CONTENT_URI, insertValues);
               return rowUri;
            }
            @Override
            protected void onPostExecute(Uri uri) {
                mNoteUri = uri;
            }
        };

        ContentValues values = new ContentValues();
        values.put(Notes.COLUMN_COURSE_ID, "");
        values.put(Notes.COLUMN_NOTE_TITLE, "");
        values.put(Notes.COLUMN_NOTE_TEXT, "");

        task.execute(values);
    }

I would like to use a modern module instead of AsyncTask. I tried using

ExecutorService executor = Executors.newSingleThreadExecutor();

but the thing is I need to return a value from the Background task to the Main thread, and I didn't manage to do it with newSingleThreadExecutor. Do you have any solutions? (I want to keep things as close as possible to the actual solution).

Is this for android? Then maybe check https://stackoverflow.com/questions/58767733/android-asynctask-api-deprecating-in-android-11-what-are-the-alternatives ... otherwise, look at concepts such as futures (https://www.baeldung.com/java-future) — GhostCat, Jan 20 '21 at 08:16
Yes I checked this question actually. But the difference here is that I pass a value between doInBackground and onPostExecute — nolwww, Jan 20 '21 at 08:20
You still didnt say if you are asking for Android specifically. — GhostCat, Jan 20 '21 at 08:34

score 0 · Answer 1 · answered Jan 20 '21 at 09:31

You can using Coroutines and suspend function with Kotlin.

suspend fun fetchData(): YourResponse {
     // make network call
     // return your response
}

then you can using in activity or fragment like this:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    GlobalScope.launch(Dispatchers.Main) {
        val data = fetchData() // fetch on IO thread
        showData(data) // back on UI thread
    }
    
}

Dispatchers.Main handle in UI thread. If you familiar with MVVM you can using ViewModel, you can use viewmodelscope.launch and listen data change with LiveData

For more information: https://developer.android.com/kotlin/coroutines

Modify an AsyncTask method using a not deprecated module

1 Answers1