Apps Can't stop playing (alarm) sound by switching between toggle button?

[jabirfatah91]

My alarm clock uses a toggle switch to start my alarm. What I want is as soon as the user click on the button again, it should stop the alarm (ring). Toggling between ON and OFF will start and stop respectively.

Right now, I am only able to start my alarm. In fact it never gets stopped. If I switch the button OFF the sound gets played even faster, that is very strange. How can I stop it? I have pasted the only part of code where I am assuming the problem occurs. If you need to look at my whole app's code I will post it. [NOTE: everything else works fine]

MainActivity:

 package com.mycompany.alarmclock;
//I haven't post the imported stuff here, they are in my file
import android.support.v7.app.ActionBarActivity;
import java.util.Calendar;
public class MainActivity extends Activity {

    AlarmManager alarmManager;
    private PendingIntent pendingIntent;//an action to be performed by other/foreign application
    private TimePicker alarmTimePicker;//In where the user set the time
    private static MainActivity inst;
    private TextView alarmTextView;//the area where alarm message/notification will be displayed


    public static MainActivity instance() {
        return inst;
    }

    public void onStart() {
        super.onStart();
        inst = this;
    }

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        alarmTimePicker = (TimePicker) findViewById(R.id.alarmTimePicker);
        alarmTextView = (TextView) findViewById(R.id.alarmText);
        ToggleButton alarmToggle = (ToggleButton) findViewById(R.id.alarmToggle);
        alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    }


    public void onToggleClicked(View view) {
        if (((ToggleButton) view).isChecked()) {//if toggle button is "ON" do the alarming function
            Log.d("MainActivity", "Alarm On");
            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.HOUR_OF_DAY, alarmTimePicker.getCurrentHour());
            calendar.set(Calendar.MINUTE, alarmTimePicker.getCurrentMinute());
            Intent myIntent = new Intent(MainActivity.this, AlarmReceiver.class);
            pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent, 0);
            alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
//In this else statement I need to add the logic so that the alarm clock stops after clicking the toggle button
        } else {//else if the toggle button is pressed again, switch off the alarm /sound
            alarmManager.cancel(pendingIntent);
            setAlarmText("");
            Log.d("MyActivity", "Alarm Off");
        }

    }

    public void setAlarmText(String alarmText) {
        alarmTextView.setText(alarmText);

    }

}

AlarmReceiver:

package com.mycompany.alarmclock;
//I haven't posted my imported stuff here, they are on my file.
import android.support.v4.content.WakefulBroadcastReceiver;

import java.net.URI;
public class AlarmReceiver extends WakefulBroadcastReceiver {
@Override
    public void onReceive(final Context context, Intent intent) {
        MainActivity inst=MainActivity.instance();
        inst.setAlarmText("Get Up! Get up!");
        Uri alarmUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);

        if (alarmUri == null) {
            alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        }
        Ringtone ringtone = RingtoneManager.getRingtone(context, alarmUri);
        ringtone.play();

        //this will send a notification message
        ComponentName comp = new ComponentName(context.getPackageName(),
                AlarmService.class.getName());
        startWakefulService(context, (intent.setComponent(comp)));
        setResultCode(Activity.RESULT_OK);
    }
}