How to execute code before Android app is killed

Question

I have an Android app that connects to surrounding devices currently running the same app, even if in background.

To do this, I use WiF-Direct to advertise the fact that I am currently running said application.

Therefore I need to stop advertising this as soon as the app is killed.

• onDestroy() cannot be used since it is not guaranteed to be called.
• onStop() and onPause() cannot be used since the app is still running.

How can I achieve this?

Currently the service is still being advertised even when the application is closed/killed.

Answer 1

You should be able to do this with a Service.

Start a service when your app was started. Override the onTaskRemoved method

@Override
public void onTaskRemoved(Intent rootIntent)
{
}

In this method do what you have to do. More detailed answer can be found here: How to know when my app has been killed? (2 answer)