Start a service to send Notification

Last exercise show how to "send a Notification" in activity. In this exercise, main activity start a service, and notification is sent in service run in background.



main.xml to have buttons to start and stop service.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 >
<TextView
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="@string/hello"
 />
<Button
 android:id="@+id/startservice"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="Start Service to send Notification"
 />
<Button
 android:id="@+id/stopservice"
 android:layout_width="fill_parent"
 android:layout_height="wrap_content"
 android:text="Stop Service"
 />
</LinearLayout>

main activity, AndroidNotifyService.java simple start and stop the service.

package com.exercise.AndroidNotifyService;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class AndroidNotifyService extends Activity {
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     Button buttonStartService = (Button)findViewById(R.id.startservice);
     Button buttonStopService = (Button)findViewById(R.id.stopservice);
  
     buttonStartService.setOnClickListener(new Button.OnClickListener(){

 @Override
 public void onClick(View arg0) {
  // TODO Auto-generated method stub
  Intent intent = new Intent(AndroidNotifyService.this, com.exercise.AndroidNotifyService.NotifyService.class);
  AndroidNotifyService.this.startService(intent);
 }});
  
     buttonStopService.setOnClickListener(new Button.OnClickListener(){

 @Override
 public void onClick(View arg0) {
  // TODO Auto-generated method stub
  Intent intent = new Intent();
  intent.setAction(NotifyService.ACTION);
  intent.putExtra("RQS", NotifyService.STOP_SERVICE);
  sendBroadcast(intent);
 }});
  
 }
}

[================================================

Correction@2011-0424: Please change the code

intent.putExtra("RQS", NotifyService.STOP_SERVICE);

to

intent.putExtra("RQS", NotifyService.RQS_STOP_SERVICE);

================================================]

NotifyService.java, our service to send notification.

package com.exercise.AndroidNotifyService;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.os.IBinder;

public class NotifyService extends Service {

final static String ACTION = "NotifyServiceAction";
final static String STOP_SERVICE = "";
final static int RQS_STOP_SERVICE = 1;

NotifyServiceReceiver notifyServiceReceiver;

private static final int MY_NOTIFICATION_ID=1;
private NotificationManager notificationManager;
private Notification myNotification;
private final String myBlog = "http://android-er.blogspot.com/";

@Override
public void onCreate() {
// TODO Auto-generated method stub
notifyServiceReceiver = new NotifyServiceReceiver();
super.onCreate();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub

IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(ACTION);
registerReceiver(notifyServiceReceiver, intentFilter);

// Send Notification
notificationManager =
 (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
myNotification = new Notification(R.drawable.icon,
  "Notification!",
  System.currentTimeMillis());
Context context = getApplicationContext();
String notificationTitle = "Exercise of Notification!";
String notificationText = "http://android-er.blogspot.com/";
Intent myIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(myBlog));
PendingIntent pendingIntent
  = PendingIntent.getActivity(getBaseContext(),
    0, myIntent,
    Intent.FLAG_ACTIVITY_NEW_TASK);
myNotification.defaults |= Notification.DEFAULT_SOUND;
myNotification.flags |= Notification.FLAG_AUTO_CANCEL;
myNotification.setLatestEventInfo(context,
   notificationTitle,
   notificationText,
   pendingIntent);
notificationManager.notify(MY_NOTIFICATION_ID, myNotification);

return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
// TODO Auto-generated method stub
this.unregisterReceiver(notifyServiceReceiver);
super.onDestroy();
}

@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}

public class NotifyServiceReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context arg0, Intent arg1) {
 // TODO Auto-generated method stub
 int rqs = arg1.getIntExtra("RQS", 0);
 if (rqs == RQS_STOP_SERVICE){
  stopSelf();
 }
}
}

}

Modify AndroidManifest.xml to add our service.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.exercise.AndroidNotifyService"
   android:versionCode="1"
   android:versionName="1.0">
 <uses-sdk android:minSdkVersion="7" />

 <application android:icon="@drawable/icon" android:label="@string/app_name">
     <activity android:name=".AndroidNotifyService"
               android:label="@string/app_name">
         <intent-filter>
             <action android:name="android.intent.action.MAIN" />
             <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
     </activity>
<service android:name=".NotifyService"/>
 </application>
</manifest>

Download the files.

Related:
- Auto start a service with Intent of "android.intent.action.BOOT_COMPLETED" action
- Send Notification inside background Thread
- Update Notification