Execute a task (line of code) at a particular time of the day

Question

I am trying to enable/disable mobile data at specific time of the day. This is what I have so far:

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

        Calendar objCal = Calendar.getInstance();
    objCal.set(Calendar.HOUR_OF_DAY, 11);
    objCal.set(Calendar.MINUTE, 0);
    objCal.set(Calendar.SECOND, 0);
    //
    // Intent intent = new Intent(this, MainActivity.class);
    // intent.setAction("com.sang.mobiledata.ACTION");
    //
     PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(
     this, MainActivity.class), PendingIntent.FLAG_UPDATE_CURRENT);
     AlarmManager am = (AlarmManager)
     this.getSystemService(Context.ALARM_SERVICE);
     am.setRepeating(AlarmManager.RTC_WAKEUP, objCal.getTimeInMillis(),
     AlarmManager.INTERVAL_DAY, pi);

Basically, I would like to turn off the data connection say at 10pm. I know this will be achieved by this line:

objNetwork.setMobileDataEnabled(getBaseContext(), false);

and again turn it on at say 6am

objNetwork.setMobileDataEnabled(getBaseContext(), true);

I just dont know how (and where) to give that condition.

EDIT:

public class Network {

public void setMobileDataEnabled(Context context, boolean enabled) {

    try {
        ConnectivityManager conman = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        Method setMobileDataEnabledMethod = ConnectivityManager.class
                .getDeclaredMethod("setMobileDataEnabled", boolean.class);

        setMobileDataEnabledMethod.setAccessible(true);
        setMobileDataEnabledMethod.invoke(conman, enabled);
    } catch (Exception e) {
        e.printStackTrace();
    }

}

EDIT 2 (complete code):

ConnBroadCastReceiver.java

public class ConnBroadcastReceiver extends BroadcastReceiver {

private static final String CONN_ACTION = "com.sang.mobiledata.IntentAction.RECEIVE_CONN_UPDATE";
Network objNetwork = new Network();
@Override
public void onReceive(Context context, Intent intent) {
    if(CONN_ACTION.equals(intent.getAction())) {
        boolean enableConn = intent.getBooleanExtra("FLAG_KEY", false);
        objNetwork.setMobileDataEnabled(context, enableConn);
    }
 }

}

MainActivity.java

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    triggerEnable(true, 6);
    triggerEnable(false, 22);
}

private void triggerEnable(boolean enableData, int hourInDay) {
    Calendar calendar = Calendar.getInstance();
    if (enableData) {
        calendar.set(Calendar.HOUR_OF_DAY, hourInDay);
    } else {
        calendar.set(Calendar.HOUR_OF_DAY, hourInDay);
    }
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);
    Intent broadcastIntent = new Intent("com.sang.mobiledata.IntentAction.RECEIVE_CONN_UPDATE");
    broadcastIntent.putExtra("FLAG_KEY", enableData);
    PendingIntent pi = PendingIntent.getBroadcast(this, 0, broadcastIntent,
            PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, pi);
}

Network.java

 public class Network {

public void setMobileDataEnabled(Context context, boolean enabled) {

    try {
        ConnectivityManager conman = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);

        Method setMobileDataEnabledMethod = ConnectivityManager.class
                .getDeclaredMethod("setMobileDataEnabled", boolean.class);

        setMobileDataEnabledMethod.setAccessible(true);
          setMobileDataEnabledMethod.invoke(conman, enabled);
    } catch (Exception e) {
        e.printStackTrace();
     }

}

manifest.xml

 <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <receiver
        android:name="com.sang.mobiledata.ConnBroadcastReceiver"
        android:exported="false" >
        <intent-filter>
            <action android:name="com.sang.mobiledata.IntentAction.RECEIVE_CONN_UPDATE" />
        </intent-filter>
    </receiver>

Answer 1

I've never tried to toggle data connection - assuming above will work if you provide proper permissions (if any is supposed to have) and above code doesn't make use of reflection as I have seen other people are shooting themselves in the foot ...

However, if you intend to open an application activity at a specific time, then I would say that's a bad practice at least from user experience point of view. Instead of doing that, you could send a broadcast message through PendingIntent.getBroadcast(...).

That being said:

1. Construct an intent with an action of your own, add a boolean flag inside that is meaningfull (true to enable connectivity, false otherwise).
2. Pass that intent to your PendingIntent.getBroadcast
3. Create a BroadcastReceiver in your class, register it in the Manifest and handle properly that action. Something like:
   

The BroadcastReceiver class:

public class ConnBroadcastReceiver extends BroadcastReceiver {
    private static final String CONN_ACTION = "my_package_name.IntentAction.RECEIVE_CONN_UPDATE";

    @Override
    public void onReceive(Context context, Intent intent) {
        if(CONN_ACTION.equals(intent.getAction())) {
            boolean enableConn = intent.getBooleanExtra("FLAG_KEY", false);
            objNetwork.setMobileDataEnabled(context, enableConn);
        }
    }
}

register it in the Manifest:

<receiver
    android:name="my_package_name.ConnBroadcastReceiver"
    android:exported="false" >
        <intent-filter>
            <action android:name="my_package_name.IntentAction.RECEIVE_CONN_UPDATE" />
        </intent-filter>
</receiver>

and trigger the broadcast from your above code:

Intent broadcastIntent = new Intent("my_package_name.IntentAction.RECEIVE_CONN_UPDATE");
broadcastIntent.putExtra("FLAG_KEY", enableData);
PendingIntent pi = PendingIntent.getBroadcast(this, 0, broadcastIntent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, objCal.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pi);

EDIT Above onCreate can be re-writen to:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    triggerEnable(true, 6);
    triggerEnable(false, 22);
}

private void triggerEnable(boolean enableData, int hourInDay) {
    Calendar calendar = Calendar.getInstance();
    if (enableData) {
        calendar.set(Calendar.HOUR_OF_DAY, hourInDay);
    } else {
        calendar.set(Calendar.HOUR_OF_DAY, hourInDay);
    }
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);
    Intent broadcastIntent = new Intent("my_package_name.IntentAction.RECEIVE_CONN_UPDATE");
    broadcastIntent.putExtra("FLAG_KEY", enableData);
    PendingIntent pi = PendingIntent.getBroadcast(this, 0, broadcastIntent,
            PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, pi);
}