SettingsActivity.java

package com.cellasoft.univrapp.activity;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Build;
import android.os.Bundle;
import android.preference.*;
import android.view.ViewGroup;
import com.actionbarsherlock.app.SherlockPreferenceActivity;
import com.cellasoft.univrapp.*;
import com.cellasoft.univrapp.service.SynchronizationService;
import com.cellasoft.univrapp.utils.FontUtils;
import com.cellasoft.univrapp.utils.GCMUtils;

import static com.cellasoft.univrapp.utils.LogUtils.LOGD;
import static com.cellasoft.univrapp.utils.LogUtils.makeLogTag;

public class SettingsActivity extends SherlockPreferenceActivity implements
        OnSharedPreferenceChangeListener {

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

        // if (!UIUtils.hasHoneycomb()) {
        onCreatePreferenceActivity();
        // } else {
        // onCreatePreferenceFragment();
        // }

        findPreferenceBykey("app_version").setSummary(
                Config.getAppVersion(getApplicationContext()));
        findPreferenceBykey("univrapp_regid").setSummary(
                Settings.getRegistrationId());
    }

    /**
     * Wraps legacy {@link #onCreate(Bundle)} code for Android < 3 (i.e. API lvl
     * < 11).
     */
    @SuppressWarnings("deprecation")
    private void onCreatePreferenceActivity() {
        addPreferencesFromResource(R.xml.settings);
    }

    /**
     * Wraps {@link #onCreate(Bundle)} code for Android >= 3 (i.e. API lvl >=
     * 11).
     */
    @SuppressLint("NewApi")
    private void onCreatePreferenceFragment() {
        getFragmentManager().beginTransaction()
                .replace(android.R.id.content, new MyPreferenceFragment())
                .commit();
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        FontUtils.setRobotoFont(this, (ViewGroup) getWindow().getDecorView());
        super.onPostCreate(savedInstanceState);
    }

    @SuppressWarnings("deprecation")
    @Override
    protected void onResume() {
        super.onResume();
        // Set up a listener whenever a key changes
        getPreferenceScreen().getSharedPreferences()
                .registerOnSharedPreferenceChangeListener(this);

        showListPreferenceValues(getPreferenceScreen());
    }

    @SuppressWarnings("deprecation")
    @Override
    protected void onPause() {
        super.onPause();
        // Unregister the listener whenever a key changes
        getPreferenceScreen().getSharedPreferences()
                .unregisterOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
                                          String key) {
        if (Settings.AUTO_UPDATE_KEY.equals(key)) {
            if (Settings.getAutoUpdate()) {
                startSynchronizationService();
            } else {
                SynchronizationService.cancelScheduledUpdates();
            }
        }

        if (Settings.NOTIFICATIONS_UNIVRAPP.equals(key)) {
            if (Settings.isEnabledNotificationUnivrApp()) {
                registerGCMClient();
            } else {
                unregisterGCMClient();
            }
        }

        Preference pref = findPreferenceBykey(key);
        if (pref instanceof ListPreference) {
            ListPreference listPref = (ListPreference) pref;
            pref.setSummary(listPref.getEntry());
        }
    }

    private void registerGCMClient() {
        if (ConnectivityReceiver.hasGoodEnoughNetworkConnection()) {
            GCMUtils.doRegister(this);
        }
    }

    private void unregisterGCMClient() {
        if (ConnectivityReceiver.hasGoodEnoughNetworkConnection()) {
            GCMUtils.doUnregister(this);
        }
    }

    @SuppressWarnings("deprecation")
    private Preference findPreferenceBykey(String key) {
        return findPreference(key);
    }

    private void startSynchronizationService() {
        if (ConnectivityReceiver.hasGoodEnoughNetworkConnection()) {
            Intent service = new Intent(this, SynchronizationService.class);
            startService(service);
        }
    }

    private void showListPreferenceValues(PreferenceGroup group) {
        int count = group.getPreferenceCount();
        for (int i = 0; i < count; i++) {
            Preference preference = group.getPreference(i);
            if (preference instanceof PreferenceCategory
                    || preference instanceof PreferenceScreen) {
                showListPreferenceValues((PreferenceGroup) preference);
            } else if (preference instanceof ListPreference) {
                ListPreference listPreference = (ListPreference) preference;
                listPreference.setSummary(listPreference.getEntry());
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class MyPreferenceFragment extends PreferenceFragment {
        private static final String TAG = makeLogTag(MyPreferenceFragment.class);

        @Override
        public void onCreate(final Bundle savedInstanceState) {
            if (BuildConfig.DEBUG) {
                LOGD(TAG, "onCreate()");
            }
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.settings);
        }
    }

}