AsyncTask ; doInbackground() not called after calling method onPreExecute()

Question

I did added async library at my project and checked already, I don\'t know why code flow doesn\'t go in to asynctask

Code

public void doMysql()
{
    Log         


        

Answer 1

Quoting Android Documentation for Async Task

When first introduced, AsyncTasks were executed serially on a single background thread. Starting with DONUT, this was changed to a pool of threads allowing multiple tasks to operate in parallel. Starting with HONEYCOMB, tasks are executed on a single thread to avoid common application errors caused by parallel execution.

If you truly want parallel execution, you can invoke executeOnExecutor(java.util.concurrent.Executor, Object[]) with THREAD_POOL_EXECUTOR.

Use this snippet for triggering AsyncTask:

if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.HONEYCOMB)
   asyncTaskInstance.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, params);
else
   pdfPageChanger.execute(params);