Android: Show toast after finishing application / activity

Question

I want to show a simple toast, when exiting an application. The problem is, that the toast is not shown. I assume it is because the acitivity is finished or because of

Answer 1

I just fired off a new thread to allow time for the Toast to show before the system process is killed. Check it out:

private Runnable checkForAdBlockRun = new Runnable() {
    @Override
    public void run() {
        boolean blocked = false;
        try {
            blocked = AdBlockUtil.areAdsBlocked();
            if (blocked) {
                Log.w(TAG, "Ads are blocked on this device.");
                adBlockHandler.sendEmptyMessage(0);

            }
        }
        catch (Exception e) {
            Log.w(TAG, "Could not check for ad blocking", e);
        }
    }
};

private Handler adBlockHandler = new Handler() {
    @Override
    public void handleMessage(Message message) {
        Toast.makeText(instance, "Can not run this app with adblock on", Toast.LENGTH_LONG).show();
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    Thread.sleep(3000);
                }
                catch (Exception e) { }
                System.exit(0);
            }
        }).start();
    }
};