How to execute a method in onDestroy?

Question

I'm writing an android app using a server. When the user exit the activity (remove it from recent activities) I want to close the connection and do some modifications in the server side before destroying the activity. So I read about the activity life cycle and I found out that I need to write the last call for closing the connections in onDestroy() . So that what I did:

Main activity:

@Override
public void onDestroy()
{
    super.onDestroy();
    try {
        ConnectionHandler.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Connection Handler:

public static void close() throws IOException {
    try {
        JSONObject json = new JSONObject();
        json.put("client", "close");

        mConnectionHandler.new AsyncSendToServer().execute(json.toString());
    } catch (JSONException e) {
        e.printStackTrace();
    }
    socket.close();
}

The message transfer is working, but the activity does not execute the ConnectionHandler.close() method. What should I do to execute this method when the user close the activity?

Answer 1

You have to write the super.onDestroy after your code. Try:

@Override
public void onDestroy()
{
    try {
        ConnectionHandler.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    super.onDestroy();
}