Set theme color dynamically

Question

I am using themes (dynamically) in my android app, like this:

my_layout.xml (extract):

Answer 1

Have you check this MultipleThemeMaterialDesign demo?

SettingActivity:

@Override
protected void onCreate(Bundle savedInstanceState) {
    Preferences.applyTheme(this);
    getDelegate().installViewFactory();
    getDelegate().onCreate(savedInstanceState);
    super.onCreate(savedInstanceState);
    setToolbar();
    addPreferencesFromResource(R.xml.preferences);
    Preferences.sync(getPreferenceManager());
    mListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
        @Override
        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
            Preferences.sync(getPreferenceManager(), key);
            if (key.equals(getString(R.string.pref_theme))) {
                finish();
                final Intent intent = IntentCompat.makeMainActivity(new ComponentName(
                        SettingsActivity.this, MainActivity.class));
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | IntentCompat.FLAG_ACTIVITY_CLEAR_TASK);
                startActivity(intent);
            }
        }
    };
}

See full example for demo.