You can dynamically register lock screen broadcast monitoring in Service to monitor the user's unlocking behavior. The service ensures that it stays in the background. Once the unlocking broadcast is received, corresponding business operations will be performed.

1.Register screen broadcast

IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
//解锁
filter.addAction(Intent.ACTION_USER_PRESENT);
registerReceiver(new ScreenReceiver(), filter);

2. Perform related operations in the unlock broadcast

private class ScreenReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        switch (intent.getAction()){
            case Intent.ACTION_SCREEN_ON:
                // 开屏
                Log.i(TAG, "onReceive: ON");
                break;
            case Intent.ACTION_SCREEN_OFF:
                // 锁屏
                Log.i(TAG, "onReceive: OFF");
                break;
            case Intent.ACTION_USER_PRESENT:
                // 解锁屏幕
                Log.i(TAG, "onReceive: PRESENT");
                //do something 
                break;
            default:
                break;
        };
    }
}

A question about the situation, it’s all about fingerprint unlocking. How do you distinguish between driving and non-driving states? Back to the topic, the previous answerer's screen broadcast monitoring is a possible idea. Maybe your second step can be achieved, but even if you have the assistance of AccessbilityServices or root, I'm afraid you can't find Lao Wang. Not talking about technology, this is a bad thing.