SettingsFragment.java

package org.theotech.ceaselessandroid.fragment;


import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.google.android.gms.analytics.Tracker;

import org.theotech.ceaselessandroid.CeaselessApplication;
import org.theotech.ceaselessandroid.R;
import org.theotech.ceaselessandroid.notification.DailyNotificationReceiver;
import org.theotech.ceaselessandroid.util.AnalyticsUtils;

public class SettingsFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener {
    private static final String TAG = SettingsFragment.class.getSimpleName();

    private FragmentStateListener mListener;
    private Tracker mTracker;

    public SettingsFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
        setHasOptionsMenu(true);
        // notify fragment state
        try {
            mListener = (FragmentStateListener) getActivity();
        } catch (ClassCastException e) {
            throw new ClassCastException(getActivity().toString() + " must implement FragmentStateListener");
        }
        mListener.notify(new FragmentState(getString(R.string.nav_settings)));
        CeaselessApplication application = (CeaselessApplication) getActivity().getApplication();
        mTracker = application.getDefaultTracker();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        getActivity().setTitle(getString(R.string.nav_settings));

        // HACK since styling preferences is convoluted/messy/broken we apply a style on create
        // and undo what we applied back to the our app's overall theme on destroy.
        // Selectively apply needed styling for preference page.
        // otherwise things like the switch will be invisible because our original accent color is white.
        getActivity().getTheme().applyStyle(R.style.AppTheme_PreferenceScreen, true);

        // create view
        View v = super.onCreateView(inflater, container, savedInstanceState);
        v.setBackgroundColor(getResources().getColor(R.color.preferenceBackgroundColor));
        return v;
    }

    @Override
    public void onDestroyView() {
        // HACK see the note in onCreateView about styling preferences.
        // this is where we undo what we applied.
        getActivity().getTheme().applyStyle(R.style.AppTheme_RevertFromPreferenceScreen, true);
        super.onDestroyView();
    }

    @Override
    public void onResume() {
        super.onResume();
        getPreferenceScreen().getSharedPreferences()
                .registerOnSharedPreferenceChangeListener(this);
        AnalyticsUtils.sendScreenViewHit(mTracker, "SettingsScreen");
    }

    @Override
    public void onPause() {
        super.onPause();
        getPreferenceScreen().getSharedPreferences()
                .unregisterOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s) {
        if ("notificationTime".equals(s) || "showNotifications".equals(s)) {
            createOrUpdateTimer();
        }
    }

    private void createOrUpdateTimer() {
        Intent dailyNotificationReceiver = new Intent(getActivity(), DailyNotificationReceiver.class);
        getActivity().sendBroadcast(dailyNotificationReceiver);
    }
}