Android pin activity on boot

Question

I\'ve got an app that registers itself as the default launcher and pins itself automatically when started.

This all works fine when installing the app. It pins itself a

Answer 1

Sorry for late answering, but...
Anyone has this problem can do this tricky work in first (LAUNCHER/HOME) activity (e.g. MainActivity):

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if (mSharedPreferences.getBoolean(KEY_PREF_RECREATED, false)) {
        mSharedPreferences.edit().putBoolean(KEY_PREF_RECREATED, false).apply();

        // start LOCK TASK here
    } else {
        mSharedPreferences.edit().putBoolean(KEY_PREF_RECREATED, true).apply();

        finish(); // close the app
        startActivity(new Intent(this, MainActivity.class)); // reopen the app
        return;
    }

    setContentView(R.layout.activity_main);

    // other codes
}