Latest Posts

Badge for TabLayout using setCustomView

Posted on June 20, 2018 by Mahmood

layout/tab_header_badge.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/relativeLayoutTabHeader"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/imageViewTabHeader"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_bell" />

    <TextView
        android:id="@+id/textViewActiveAlarmBadge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toEndOf="@+id/imageViewTabHeader"
        android:text="1"
        android:textColor="@color/accent" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/relativeLayoutTabHeader"

android:layout_width="match_parent"

android:layout_height="match_parent">

<ImageView

android:id="@+id/imageViewTabHeader"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/ic_bell" />

<TextView

android:id="@+id/textViewActiveAlarmBadge"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_toEndOf="@+id/imageViewTabHeader"

android:text="1"

android:textColor="@color/accent" />

</RelativeLayout>

            viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());

            viewPagerAdapter.addFragment(moreFragment); // 3
            viewPagerAdapter.addFragment(alarmHistoryFragment); // 2
            viewPagerAdapter.addFragment(activeAlarmsFragment); // 1
            viewPagerAdapter.addFragment(mainFragment); // 0


            viewPagerMain.setAdapter(viewPagerAdapter);
            viewPagerMain.setCurrentItem(3); // set default view on open
            tabLayoutMain.setupWithViewPager(viewPagerMain);

            tabLayoutMain.getTabAt(3).setIcon(R.drawable.ic_home);
            //tabLayoutMain.getTabAt(2).setIcon(R.drawable.ic_bell);
            tabLayoutMain.getTabAt(1).setIcon(R.drawable.ic_envelope_open);
            tabLayoutMain.getTabAt(0).setIcon(R.drawable.ic_bars);


            View tabHeader = LayoutInflater.from(this).inflate(R.layout.tab_header_badge, null);
            TextView textViewBadge = tabHeader.findViewById(R.id.textViewActiveAlarmBadge);
            textViewBadge.setText("10");
            tabLayoutMain.getTabAt(2).setCustomView(tabHeader);

            // endregion

viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());

viewPagerAdapter.addFragment(moreFragment); // 3

viewPagerAdapter.addFragment(alarmHistoryFragment); // 2

viewPagerAdapter.addFragment(activeAlarmsFragment); // 1

viewPagerAdapter.addFragment(mainFragment); // 0

viewPagerMain.setAdapter(viewPagerAdapter);

viewPagerMain.setCurrentItem(3); // set default view on open

tabLayoutMain.setupWithViewPager(viewPagerMain);

tabLayoutMain.getTabAt(3).setIcon(R.drawable.ic_home);

//tabLayoutMain.getTabAt(2).setIcon(R.drawable.ic_bell);

tabLayoutMain.getTabAt(1).setIcon(R.drawable.ic_envelope_open);

tabLayoutMain.getTabAt(0).setIcon(R.drawable.ic_bars);

View tabHeader = LayoutInflater.from(this).inflate(R.layout.tab_header_badge, null);

TextView textViewBadge = tabHeader.findViewById(R.id.textViewActiveAlarmBadge);

textViewBadge.setText("10");

tabLayoutMain.getTabAt(2).setCustomView(tabHeader);

// endregion

References https://mobikul.com/make-custom-tabs-icons-android/ https://stackoverflow.com/questions/41530141/how-to-show-notification-counter-in-a-tablayout https://stackoverflow.com/questions/43266079/how-to-add-badge-to-android-tablayout

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Tablayout with Icons on Android

Posted on June 18, 2018 by Mahmood

mTabLayout.setupWithViewPager(mViewPager);
for (int i = 0; i < mTabLayout.getTabCount(); i++) {
  mTabLayout.getTabAt(i).setIcon(R.drawable.your_icon);
}

mTabLayout.setupWithViewPager(mViewPager);

for (int i = 0; i < mTabLayout.getTabCount(); i++) {

mTabLayout.getTabAt(i).setIcon(R.drawable.your_icon);

}

<android.support.design.widget.TabLayout
         app:tabTextColor="@color/gray"
         app:tabMode="fixed"
         app:tabBackground="@color/red"
         app:tabIndicatorHeight="4dp"
         app:tabIndicatorColor="@color/purple"
         app:tabPadding="2dp"
         app:tabSelectedTextColor="@color/white"
         app:tabMinWidth="64dp"
         android:layout_height="wrap_content"
         android:layout_width="match_parent">

     <!--add height and width to TabItem -->
     <android.support.design.widget.TabItem 
             android:text="@string/tab_text"/>

     <android.support.design.widget.TabItem
             android:icon="@drawable/ic_android"/>

 </android.support.design.widget.TabLayout>

<android.support.design.widget.TabLayout

app:tabTextColor="@color/gray"

app:tabMode="fixed"

app:tabBackground="@color/red"

app:tabIndicatorHeight="4dp"

app:tabIndicatorColor="@color/purple"

app:tabPadding="2dp"

app:tabSelectedTextColor="@color/white"

app:tabMinWidth="64dp"

android:layout_height="wrap_content"

android:layout_width="match_parent">

<android.support.design.widget.TabItem

android:text="@string/tab_text"/>

<android.support.design.widget.TabItem

android:icon="@drawable/ic_android"/>

</android.support.design.widget.TabLayout>

References https://stackoverflow.com/questions/30892545/tablayout-with-icons-only

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Make notification resume and not recreate activity on Android

Posted on June 14, 2018 by Mahmood

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

1	PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

References https://stackoverflow.com/questions/16898047/how-to-make-notification-resume-and-not-recreate-activity

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How the activity should be launched with android:launchMode

Posted on June 12, 2018 by Mahmood

Use Cases Launch Mode Multiple Instances? Comments Normal launches for most activities “standard“ Yes Default. The system always creates a new instance of the activity […]

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Scheduling in Spring with Quartz

Posted on June 9, 2018 by Mahmood

@Component
public class SampleJob implements Job {
 
    @Autowired
    private SampleJobService jobService;
 
    public void execute(JobExecutionContext context) throws JobExecutionException {
        jobService.executeSampleJob();
    }
}

@Component

public class SampleJob implements Job {

@Autowired

private SampleJobService jobService;

public void execute(JobExecutionContext context) throws JobExecutionException {

jobService.executeSampleJob();

}

References http://www.baeldung.com/spring-quartz-schedule

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Access to application class in Broadcast Receiver

Posted on June 8, 2018 by Mahmood

@Override
 public void onReceive(final Context context, Intent intent) {
   MyApplication mApplication = ((MyApplication)context.getApplicationContext());
 }

@Override

public void onReceive(final Context context, Intent intent) {

MyApplication mApplication = ((MyApplication)context.getApplicationContext());

}

References https://stackoverflow.com/questions/24825684/access-to-application-class-in-broadcast-receiver

Uncategorized

Check Google Play Services Availability on Android

Posted on June 8, 2018 by Mahmood

It should be called on onResume:

    /**
     * A utility method to validate that the appropriate version of the Google Play Services is
     * available on the device. If not, it will open a dialog to address the issue. The dialog
     * displays a localized message about the error and upon user confirmation (by tapping on
     * dialog) will direct them to the Play Store if Google Play services is out of date or
     * missing, or to system settings if Google Play services is disabled on the device.
     */
    public static boolean checkGooglePlayServices(final Activity activity) {
        final int googlePlayServicesCheck = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(
                activity);
        switch (googlePlayServicesCheck) {
            case ConnectionResult.SUCCESS:
                return true;
            default:

                Dialog dialog = GoogleApiAvailability.getInstance().getErrorDialog(activity, googlePlayServicesCheck, 0);
                dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialog) {
                        activity.finish();
                    }
                });

                dialog.show();
        }
        return false;
    }

/**

* A utility method to validate that the appropriate version of the Google Play Services is

* available on the device. If not, it will open a dialog to address the issue. The dialog

* displays a localized message about the error and upon user confirmation (by tapping on

* dialog) will direct them to the Play Store if Google Play services is out of date or

* missing, or to system settings if Google Play services is disabled on the device.

public static boolean checkGooglePlayServices(final Activity activity) {

final int googlePlayServicesCheck = GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(

activity);

switch (googlePlayServicesCheck) {

case ConnectionResult.SUCCESS:

return true;

default:

Dialog dialog = GoogleApiAvailability.getInstance().getErrorDialog(activity, googlePlayServicesCheck, 0);

dialog.setOnCancelListener(new DialogInterface.OnCancelListener() {

@Override

public void onCancel(DialogInterface dialog) {

activity.finish();

}

});

dialog.show();

}

return false;

}

References https://www.programcreek.com/java-api-examples/?api=com.google.android.gms.common.GoogleApiAvailability

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Interprocess Communication between Activity and Service using Messenger on Android

Posted on June 5, 2018 by Mahmood

MyService

public class MyService extends Service {

    private final int JOB1 = 1;
    private final int JOB1Response = 2;
    private final int JOB2 = 3;
    private final int JOB2Response = 4;
    Messenger messenger = new Messenger(new MyServiceHandler());

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return messenger.getBinder();
    }


    class MyServiceHandler extends Handler {

        Message MSG;
        String message;
        Bundle bundle = new Bundle();

        @Override
        public void handleMessage(Message msg) {

            try {

                switch (msg.what) {
                    case JOB1:

                        message = "This is the first message from service";
                        MSG = Message.obtain(null, JOB1Response);
                        bundle.putString("responseMessage", message);
                        MSG.setData(bundle);
                        msg.replyTo.send(MSG);

                        break;

                    case JOB2:

                        message = "This is the second message from service";
                        MSG = Message.obtain(null, JOB2Response);
                        bundle.putString("responseMessage", message);
                        MSG.setData(bundle);
                        msg.replyTo.send(MSG);

                        break;

                    default:
                        super.handleMessage(msg);
                }

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

        }
    }
}

public class MyService extends Service {

private final int JOB1 = 1;

private final int JOB1Response = 2;

private final int JOB2 = 3;

private final int JOB2Response = 4;

Messenger messenger = new Messenger(new MyServiceHandler());

@Nullable

@Override

public IBinder onBind(Intent intent) {

return messenger.getBinder();

}

class MyServiceHandler extends Handler {

Message MSG;

String message;

Bundle bundle = new Bundle();

@Override

public void handleMessage(Message msg) {

try {

switch (msg.what) {

case JOB1:

message = "This is the first message from service";

MSG = Message.obtain(null, JOB1Response);

bundle.putString("responseMessage", message);

MSG.setData(bundle);

msg.replyTo.send(MSG);

break;

case JOB2:

message = "This is the second message from service";

MSG = Message.obtain(null, JOB2Response);

bundle.putString("responseMessage", message);

MSG.setData(bundle);

msg.replyTo.send(MSG);

break;

default:

super.handleMessage(msg);

}

} catch (Exception ex) {

ex.printStackTrace();

}

MainActivity

public class MainActivity extends AppCompatActivity {

    private final int JOB1 = 1;
    private final int JOB1Response = 2;
    private final int JOB2 = 3;
    private final int JOB2Response = 4;
    Messenger messenger = null;
    boolean isBound = false;

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

        Intent intent = new Intent(this, MyService.class);
        bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
    }


    ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            messenger = new Messenger(service);
            isBound = true;
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            messenger = null;
            isBound = false;
        }
    };

    // JOB1
    private void sendMessage1() {
        try {
            if (isBound){
                  Message msg = Message.obtain(null, JOB1);
                  msg.replyTo = new Messenger(new MainActivityHandler());
                  messenger.send(msg);
            }
           
        } catch (Exception ex) {
            ex.printStackTrace();
        }

    }

    // JOB2
    private void sendMessage2() {
        try {
            if (isBound){
                  Message msg = Message.obtain(null, JOB2);
                  msg.replyTo = new Messenger(new MainActivityHandler());
                  messenger.send(msg);
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    private void LogMessage1(String msg)
    {
        Log.d("MSG",msg);
    }

    @Override
    protected void onStop() {

        unbindService(serviceConnection);
        isBound = false;
        messenger = null;

        super.onStop();
    }

    class MainActivityHandler extends Handler {
        @Override
        public void handleMessage(Message msg) {

            String message;

            switch (msg.what) {
                case JOB1Response:
                    message = msg.getData().getString("responseMessage");

                    // do something here

                    LogMessage1(message);

                    break;
                case JOB2Response:
                    message = msg.getData().getString("responseMessage");

                    // do something here
                    break;
                default:
                    super.handleMessage(msg);
            }


        }
    }
}

100

101

102

103

104

public class MainActivity extends AppCompatActivity {

private final int JOB1 = 1;

private final int JOB1Response = 2;

private final int JOB2 = 3;

private final int JOB2Response = 4;

Messenger messenger = null;

boolean isBound = false;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Intent intent = new Intent(this, MyService.class);

bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);

}

ServiceConnection serviceConnection = new ServiceConnection() {

@Override

public void onServiceConnected(ComponentName name, IBinder service) {

messenger = new Messenger(service);

isBound = true;

}

@Override

public void onServiceDisconnected(ComponentName name) {

messenger = null;

isBound = false;

}

};

// JOB1

private void sendMessage1() {

try {

if (isBound){

Message msg = Message.obtain(null, JOB1);

msg.replyTo = new Messenger(new MainActivityHandler());

messenger.send(msg);

}

} catch (Exception ex) {

ex.printStackTrace();

}

// JOB2

private void sendMessage2() {

try {

if (isBound){

Message msg = Message.obtain(null, JOB2);

msg.replyTo = new Messenger(new MainActivityHandler());

messenger.send(msg);

}

} catch (Exception ex) {

ex.printStackTrace();

}

private void LogMessage1(String msg)

{

Log.d("MSG",msg);

}

@Override

protected void onStop() {

unbindService(serviceConnection);

isBound = false;

messenger = null;

super.onStop();

}

class MainActivityHandler extends Handler {

@Override

public void handleMessage(Message msg) {

String message;

switch (msg.what) {

case JOB1Response:

message = msg.getData().getString("responseMessage");

// do something here

LogMessage1(message);

break;

case JOB2Response:

message = msg.getData().getString("responseMessage");

// do something here

break;

default:

super.handleMessage(msg);

}

AndroidManifest.xml

<service android:name=".MyService" android:process=":remote"/>

1	<service android:name=".MyService" android:process=":remote"/>

References https://www.youtube.com/watch?v=yAmnirP0d4U&t=0s&list=PLshdtb5UWjSp0879mLeCsDQN6L73XBZTk https://developer.android.com/guide/components/bound-services

Uncategorized

Stop Apache 2 Web Server Command

Posted on June 4, 2018 by Mahmood

/etc/init.d/apache2 stop

1	/etc/init.d/apache2 stop

sudo /etc/init.d/apache2 stop

1	sudo /etc/init.d/apache2 stop

sudo service apache2 stop

1	sudo service apache2 stop

systemctl stop apache2.service

1	systemctl stop apache2.service

References https://www.cyberciti.biz/faq/star-stop-restart-apache2-webserver/

Uncategorized

Schedule tasks with AlarmManager on Android

Posted on June 3, 2018 by Mahmood

Receiver Class

public class MyAlarmReceiver extends BroadcastReceiver {

    private AlarmManager alarmManager;
    private PowerManager powerManager;
    private PowerManager.WakeLock wakeLock;

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

        try {
            powerManager = (PowerManager) context.getSystemService(POWER_SERVICE);
            wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "TimeTickWakeLog");
            wakeLock.acquire(5 * 1000);

            MyLog.d("alarm manager : begin onReceive");
        } catch (Exception ex) {
            ex.printStackTrace();
            MyLog.ex(ex);

            if (wakeLock != null) {
                wakeLock.release();
                powerManager = null;
                wakeLock = null;
            }
        }

        try {
            int isServiceRunning = 0;
            ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
                if (MyMqttService.class.getName().equals(service.service.getClassName())) {

                    // service is running
                    isServiceRunning++;
                }
            }

            if (isServiceRunning == 0) {
                // service is not running, start it
                Intent serviceIntent = new Intent(context, MyMqttService.class);
                context.startService(serviceIntent);
            }

            // connect to mqtt broker if needed
            if (Statics.isAppInBackground()) {

                EventBus.getDefault().post(new ReconnectMqttEvent());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            MyLog.ex(ex);
        }


        // the reason for separating try/catches is to insure next alarm manager will be scheduled
        try {
            // region reschedule alarm manager
            long timeToWait = 60 * 1000;

            alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
            Intent myIntent = new Intent(context, MyAlarmReceiver.class);
            PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0, myIntent, 0);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                        SystemClock.elapsedRealtime() + timeToWait, alarmIntent);
            } else {
                alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                        SystemClock.elapsedRealtime() + timeToWait, alarmIntent);
            }
            // endregion


            MyLog.d("alarm manager : end onReceive");

            if (wakeLock != null) {
                wakeLock.release();
                powerManager = null;
                wakeLock = null;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            MyLog.ex(ex);

            if (wakeLock != null) {
                wakeLock.release();
                powerManager = null;
                wakeLock = null;
            }
        }
    }
}

public class MyAlarmReceiver extends BroadcastReceiver {

private AlarmManager alarmManager;

private PowerManager powerManager;

private PowerManager.WakeLock wakeLock;

@Override

public void onReceive(Context context, Intent intent) {

try {

powerManager = (PowerManager) context.getSystemService(POWER_SERVICE);

wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "TimeTickWakeLog");

wakeLock.acquire(5 * 1000);

MyLog.d("alarm manager : begin onReceive");

} catch (Exception ex) {

ex.printStackTrace();

MyLog.ex(ex);

if (wakeLock != null) {

wakeLock.release();

powerManager = null;

wakeLock = null;

}

try {

int isServiceRunning = 0;

ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {

if (MyMqttService.class.getName().equals(service.service.getClassName())) {

// service is running

isServiceRunning++;

}

if (isServiceRunning == 0) {

// service is not running, start it

Intent serviceIntent = new Intent(context, MyMqttService.class);

context.startService(serviceIntent);

}

// connect to mqtt broker if needed

if (Statics.isAppInBackground()) {

EventBus.getDefault().post(new ReconnectMqttEvent());

}

} catch (Exception ex) {

ex.printStackTrace();

MyLog.ex(ex);

}

// the reason for separating try/catches is to insure next alarm manager will be scheduled

try {

// region reschedule alarm manager

long timeToWait = 60 * 1000;

alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

Intent myIntent = new Intent(context, MyAlarmReceiver.class);

PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0, myIntent, 0);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,

SystemClock.elapsedRealtime() + timeToWait, alarmIntent);

} else {

alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,

SystemClock.elapsedRealtime() + timeToWait, alarmIntent);

}

// endregion

MyLog.d("alarm manager : end onReceive");

if (wakeLock != null) {

wakeLock.release();

powerManager = null;

wakeLock = null;

}

} catch (Exception ex) {

ex.printStackTrace();

MyLog.ex(ex);

if (wakeLock != null) {

wakeLock.release();

powerManager = null;

wakeLock = null;

}

Manifest file

        <receiver android:name=".MyAlarmReceiver">

        </receiver>

</receiver>

onCreate of Service

        // region schedule alarm manager for the first time

        long timeToWait = 60 * 1000;

        alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, MyAlarmReceiver.class);
        PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                    SystemClock.elapsedRealtime() + timeToWait, alarmIntent);
        } else {
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,
                    SystemClock.elapsedRealtime() + timeToWait, alarmIntent);
        }
        // endregion

// region schedule alarm manager for the first time

long timeToWait = 60 * 1000;

alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

Intent intent = new Intent(this, MyAlarmReceiver.class);

PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

alarmManager.setAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP,

SystemClock.elapsedRealtime() + timeToWait, alarmIntent);

} else {

alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP,

SystemClock.elapsedRealtime() + timeToWait, alarmIntent);

}

// endregion

Rereferences https://developer.android.com/training/scheduling/alarms https://stackoverflow.com/questions/4459058/alarm-manager-example https://www.javatpoint.com/android-alarmmanager

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