Android AsyncTask - avoid multiple instances running

Question

I have AsyncTask that processes some background HTTP stuff. AsyncTask runs on schedule (Alarms/service) and sometime user executes it manually.

I process records fro

Answer 1

You can execute your AsyncTask's on an Executor using executeOnExecutor()

To make sure that the threads are running in a serial fashion please use: SERIAL_EXECUTOR.

Misc: How to use an Executor

If several activities are accessing your DB why don't create a sort of gateway database helper and use the synchronized block to ensure only one thread has access to it at an instant