java - AlarmManager setInexactRepeating, setWindow, setRepeating methods do not fire alarm when called from within loop for week days

Question

Requirement :-
I need to fire alarm on selected days of a week and a date from which alarms would start(for example I want to fire alarm on Friday and Saturday of every week starting from May 26, 2017 at 6:45 PM)

Problem:-
BroadcastReceiver's onReceive() method does not executes when AlarmManager setInexactRepeating, setWindow or setRepeating methods are called from within a loop.

Code used for this task is mentioned below:-
AndroidManifest.xml

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/MainThemeBlueAccent">
        <activity android:name=".Activities.MainActivity">
           <intent-filter>
             <action android:name="android.intent.action.MAIN" />
             <category android:name="android.intent.category.LAUNCHER" />
           </intent-filter>
        </activity>

        <activity
            android:name=".Activities.ActivitySaveReminder"
            android:screenOrientation="portrait"
            android:theme="@style/MainThemeBlueAccent"
            android:windowSoftInputMode="adjustNothing" />

        <receiver android:name=".Activities.MedicineReminderAlarmReceiver"
            android:process=":remote">
            <!--<intent-filter>
                <action android:name="android.intent.action.NOTIFY"/>
            </intent-filter>-->
        </receiver>

        <receiver android:name=".Activities.AlarmBootCompletedReceiver"
            android:exported="false"
            android:enabled="true"
           android:permission="android.permission.RECEIVE_BOOT_COMPLETED">  
           <intent-filter>
             <action android:name="android.intent.action.BOOT_COMPLETED"/>
             <category android:name="android.intent.category.DEFAULT"/>
           </intent-filter>
        </receiver>

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

ActivitySaveReminder.java

public class ActivitySaveReminder extends AppCompatActivity{

    onCreate() {
        fireAlarmOnWeekDays();
    }

    public void fireAlarmOnWeekDays() {
        long[] weekDaysMillisecondsArr = {1495737000000l, 1495823400000l};
        long[] alarmStartMillisArr = {1495801680000l};
        Calendar calendar = Calendar.getInstance();

        for (int i = 0; i < weekDaysMillisecondsArr.length; i++) {
            calendar.setTimeInMillis(weekDaysMillisecondsArr[i]);
            Log.d(TAG, "fireAlarmOnWeekDays: -->> selected day time stamp --> "+calendar.getTime());

            for (int j = 0; j < alarmStartMillisArr.length; j++) {
                int id = new Random().nextInt();
                Intent intentRemiderAlarm = new Intent(mContext, MedicineReminderAlarmReceiver.class);
                PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, id, intentRemiderAlarm, PendingIntent.FLAG_UPDATE_CURRENT);
                AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
                pendingIntentsList.add(pendingIntent);

                if (Build.VERSION.SDK_INT >= 19) {
                    alarmManager.setWindow(AlarmManager.RTC_WAKEUP, alarmStartMillisArr[j], AlarmManager.INTERVAL_DAY * 7, pendingIntent);
//                    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, alarmStartMillisArr[j], AlarmManager.INTERVAL_DAY * 7, pendingIntent);
//                    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, alarmStartMillisArr[j], AlarmManager.INTERVAL_DAY * 7, pendingIntent);
                } else {
                    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, alarmStartMillisArr[j], AlarmManager.INTERVAL_DAY * 7, pendingIntent);
                }
                Log.d(TAG, "fireAlarmOnWeekDays: -->> alarm start time -->> "+alarmStartMillisArr[j] + " id -->> "+id);
            }
        }
    }
}

MedicineReminderAlarmReceiver.java

ublic class MedicineReminderAlarmReceiver extends BroadcastReceiver {
    private final String TAG = "MedicineRemindrAlrmRcvr";

    @Override
    public void onReceive(Context context, Intent intent) {
        if (BuildConfig.DEBUG) {
            Log.d(TAG, "onReceive: -->> executed");
            Log.d(TAG, "onReceive: -->> System.currentTimeMillis() -->> "+ System.currentTimeMillis());
        }
    }
}

styles.xml

<style name="MainThemeBlueAccent" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
        <item name="colorPrimary">@color/status_bar_color</item>
        <item name="colorPrimaryDark">@color/status_bar_color</item>
        <item name="colorAccent">@color/blue_color</item>
        <item name="android:actionMenuTextColor">@color/text_heading_color_black</item>
        <item name="actionMenuTextColor">@color/text_heading_color_black</item>
        <item name="android:textColorSecondary">@color/text_sub_heading_color_light_black</item>
    </style>

strings.xml

<string name="app_name">ReminderSample</string>

Answer 1

try this code its working for Friday Alarm and similarly you can set for Saturday First you have to register your alarm Receiver and alarm time

public static void SetAlarmForFriday(Context mContext) {
        try {

            Calendar calendar = Calendar.getInstance();
            calendar.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);
            System.out.println("Date " + calendar.getTime());

            int year = calendar.get(Calendar.YEAR);
            int month = calendar.get(Calendar.MONTH) + 1;
            int day = calendar.get(Calendar.DAY_OF_MONTH);

            String DateToConvert = day + "," + month + "," + year + " 10:10 AM";
            Date date = new SimpleDateFormat("dd,MM,yyyy hh:mm a", Locale.ENGLISH).parse(DateToConvert);

            Intent intent = new Intent(mContext, AlarmReceiver.class);
            intent.setAction("setYourActionHere");
            PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext.getApplicationContext(), 234324243, intent, 0);
            AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(mContext.ALARM_SERVICE);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, date.getTime(), AlarmManager.INTERVAL_DAY, pendingIntent);

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

Make Receiver Class

public class AlarmReceiver extends BroadcastReceiver {
    public AlarmReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.


    }

}

Register your Broadcast receiver in manifest file under Application tag

<receiver
            android:name=".AlarmReceiver"
            android:enabled="true"
            android:exported="true"></receiver>