Receiving package install and uninstall events

problem ：

I am trying to detect when a new App is being installed but only if my app is running. I try to detect when a new application is installed , But only if my application is running .I managed to detect the installation of the app by making a BroadcastReceiver and activating it inside the AndroidManifest file but this will detect even if my app is closed. I managed to make a BroadcastReceiver And in AndroidManifest Activate it in the file to detect the installation of the application , But even if my application closes , This will also be detected .So that is why I need to manually activate and deactivate the broadcastreveiver. So that's why I need to manually activate and deactivate broadcastreviver.To do this I have this code: So , I have the following code ：

br = new BroadcastReceiver() {    @Override    public void onReceive(Context context, Intent intent) {        // TODO Auto-generated method stub        Log.i("Enter", "Enters here");        Toast.makeText(context, "App Installed!!!!.", Toast.LENGTH_LONG).show();    }};IntentFilter intentFilter = new IntentFilter();intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);intentFilter.addAction(Intent.ACTION_PACKAGE_INSTALL);registerReceiver(br, intentFilter);

This should make a toast when a new app is installed. This should be a toast when installing new applications .But sadly it does not. But unfortunately it doesn't .It does not enter in the onReceive method. stay onReceive No entry in method .Any help is appreciated. To express appreciation for any help .

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Solution ：

Reference resources ： https://stackoom.com/en/question/VLMw