Broadcast reciever fired at the start of the app while setting alarm manager

Question

I'm developing an app which takes the system to silent mode at specific time of the day. I'm using alarm manager for this. I call the AddAlarm Activity after the registration activity. My problem is...The phone goes to silent mode only when I open the app but not at the scheduled time. I donno where I'm going wrong.

Here is my AddAlarms class

public class AddAlarms extends Activity {


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

        Intent intent = new Intent(this, ScheduledService.class);
        AlarmManager am1 = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Calendar calendar1 = Calendar.getInstance();
        calendar1.set(Calendar.HOUR_OF_DAY, 7);
        calendar1.set(Calendar.MINUTE, 20);
        calendar1.set(Calendar.AM_PM, Calendar.AM);
        PendingIntent pi1 = PendingIntent.getBroadcast(this, 1421521, intent, 0);
        am1.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pi1);

        startActivity(new Intent(this, NavActivity.class));
        finish();
    }

    @Override
    protected void onStop() {
        super.onStop();
    }
}

Here is my ScheduledService class

public class ScheduledService extends WakefulBroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
       Intent silService=new Intent(context,SilentService.class);
        context.startService(silService);
    }
}

Here is my SilentService class

public class SilentService extends Service {
    private AudioManager myAudioManager;

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.
        return null;
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        myAudioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
        if (myAudioManager.getRingerMode() != AudioManager.RINGER_MODE_SILENT)
            myAudioManager.setRingerMode(AudioManager.RINGER_MODE_SILENT);


        return START_STICKY;
    }
}

And my manifest file

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="net.notifoid.mcestraddler" >


    <uses-permission android:name="com.android.alarm.permission.SET_ALARM" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        tools:replace="android:icon" >


        <activity
            android:name=".activities.RegisterActivity"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.NoActionBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".activities.NavActivity"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.NoActionBar" />

        <activity
            android:name=".activities.AddAlarms"
            android:label="@string/app_name"
            android:theme="@style/Theme.AppCompat.NoActionBar" />

        <service
            android:name=".silentmode.SilentService"
            android:enabled="true"
            android:exported="false" />

        <receiver
            android:name=".silentmode.ScheduledService"
            android:enabled="true" >
        </receiver>

    </application>

</manifest>

I'll be great if somebody can help me.

Answer 1

If you're opening the app after 7:20AM, then the alarm will be set for 7:20AM on the same day. The alarm will immediately fire in this case.

You can avoid this by evaluating if it is already past 7:20AM and setting the alarm for the next day:

Calendar calendar1 = Calendar.getInstance();
if(calendar1.get(Calendar.HOUR_OF_DAY) > 7 ||
        (calendar1.get(Calendar.HOUR_OF_DAY) == 7 && calendar1.get(Calendar.MINUTE) >= 20)){
    calendar1.add(Calendar.DATE, 1);
}

calendar1.set(Calendar.HOUR_OF_DAY, 7);
calendar1.set(Calendar.MINUTE, 20);