希望你能在这里帮助我！我想制作一个开关按钮，以打开每日推送通知功能。我怎么做？

开关按钮位于“设置”片段上

我的MainActivity.java：

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

@Override
protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    displayView(R.id.nav_home);



}


@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
        return;
    }

    if (getSupportFragmentManager().findFragmentById(R.id.content_main) instanceof Article) {
        ((Article) getSupportFragmentManager().findFragmentById(R.id.content_main)).handleOnBackPress();
        return;
    }

    if (getSupportFragmentManager().getBackStackEntryCount() == 0) {
        displayView(R.id.nav_home);
    } else {
        super.onBackPressed();

    }
}

private void displayView(int itemId) {
    Fragment fragment = null;

    switch (itemId) {
        case R.id.nav_home:
            fragment = new Article();
            break;
        case R.id.nav_Recipes:
            fragment = new RecipesMain();
            break;
        case R.id.nav_Converter:
            fragment = new Converter();
            break;
        case R.id.nav_Videos:
            fragment = new Videos();
            break;
        case R.id.nav_Tracking:
            fragment = new Tracking();
            break;
        case R.id.nav_TrainerMenu:
            fragment = new TrainerMenu();
            break;
        case R.id.nav_Settings:
            fragment = new Settings();
            break;
        case R.id.nav_About:
            showDialog();
            break;

    }


    if (fragment != null) {
        final Fragment finalFragment = fragment;
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                getSupportFragmentManager()
                        .beginTransaction()
                        .setCustomAnimations(android.R.anim.slide_in_left, android.R.anim.slide_out_right)
                        .replace(R.id.content_main, finalFragment)
                        .commit();
            }
        }, 0);
            }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
    }




@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {

    displayView(item.getItemId());
    return true;
}
private void showDialog()
{
    String text2 = "<font color=#6774bd>About SG50 App</font>";

    AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.AppCompatAlertDialogStyle);
    builder.setTitle(Html.fromHtml(text2));

    String text3 = "<font color=#A4A4A4>App made by Matan Cohen , Please contact me for any questions.</font>";//for custom message
    builder.setMessage(Html.fromHtml(text3));

    builder.setPositiveButton("OK", new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int which)
        {
            Toast toast = Toast.makeText(getApplicationContext(), "תודה על שימוש", Toast.LENGTH_SHORT);
            toast.setGravity(Gravity.CENTER, 0, 0);
            toast.show();
        }
    });

    builder.show();
 }

}

片段Settings.java 的“ editor.getBoolean”给我无法解决错误！ 我能做什么？：

public class Settings extends Fragment {

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_settings, container, false);

}


@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    getActivity().setTitle("הגדרות");

    Switch aSwitch = (Switch) getView().findViewById(R.id.dailyTipSwitch);
    SharedPreferences sharedPreferences = getActivity().getSharedPreferences("key", 0);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putBoolean("switchValue", aSwitch.isChecked());
    editor.apply();
    boolean showNotifications = editor.getBoolean("key",false);
            if (aSwitch.isChecked() != showNotifications) {
                editor.putBoolean("key",!showNotifications).apply();
            }
            else {
                Calendar calendar = Calendar.getInstance();
                calendar.set(Calendar.HOUR_OF_DAY,19);
                calendar.set(Calendar.MINUTE,27);
                Intent intent = new Intent(getActivity().getApplicationContext(),NotificationReciever.class);
                PendingIntent pendingIntent = PendingIntent.getBroadcast(getActivity().getApplicationContext(),100,intent,PendingIntent.FLAG_UPDATE_CURRENT);
                AlarmManager alarmManager = (AlarmManager) getActivity().getSystemService(ALARM_SERVICE);
                alarmManager.setRepeating(alarmManager.RTC_WAKEUP,calendar.getTimeInMillis(),AlarmManager.INTERVAL_DAY,pendingIntent);
            }


    }

}

Notification_Reciever.java

public class NotificationReciever extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {

    NotificationManager notificationManager = (NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);

    Intent repeatingIntent = new Intent(context,MainActivity.class);
    repeatingIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

    PendingIntent pendingIntent = PendingIntent.getActivity(context,100,repeatingIntent,PendingIntent.FLAG_UPDATE_CURRENT);



    NotificationCompat.Builder mBuilder = new
            NotificationCompat.Builder(context)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setStyle(new NotificationCompat.BigTextStyle().bigText("בוקר טוב אלוף! תאכל ותשתה טוב!"))
            .setContentText(context.getString(R.string.NotificationText))
            .setContentTitle(context.getString(R.string.GoodMorningNotification))
            .setContentIntent(pendingIntent)
            .setAutoCancel(true);

    notificationManager.notify(100, mBuilder.build());
    }
}

fragemnt_settings.XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="30dp"
android:paddingBottom="30dp"
android:paddingTop="30dp"
android:paddingRight="30dp">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="1">

    <Switch
        android:id="@+id/switch1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:layout_gravity="left" />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:layout_gravity="right"
        android:text="@string/daily_tip"
        android:textSize="20sp"/>
</LinearLayout>


</LinearLayout>

谢谢！！希望你能帮我！

editor.getBoolean给我无法解决错误！！！我能做什么？？？