ThemeSettingsFragment.java

package com.xabber.android.ui.preferences;


import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;

import com.xabber.android.R;
import com.xabber.android.ui.activity.PreferenceSummaryHelperActivity;

public class ThemeSettingsFragment extends android.preference.PreferenceFragment
        implements SharedPreferences.OnSharedPreferenceChangeListener {

    private OnThemeSettingsFragmentInteractionListener mListener;

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

        addPreferencesFromResource(R.xml.preference_theme);

        PreferenceSummaryHelperActivity.updateSummary(getPreferenceScreen());
    }

    @Override
    public void onResume() {
        super.onResume();
        PreferenceManager.getDefaultSharedPreferences(getActivity())
                .registerOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onPause() {
        super.onPause();
        PreferenceManager.getDefaultSharedPreferences(getActivity())
                .unregisterOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
        if (key.equals(getString(R.string.interface_theme_key))) {
            mListener.onThemeChanged();
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            mListener = (OnThemeSettingsFragmentInteractionListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnThemeSettingsFragmentInteractionListener");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mListener = null;
    }

    public interface OnThemeSettingsFragmentInteractionListener {
        void onThemeChanged();
    }
}