Android Alarm Manager to Start Service every hour

 Start Service every hour


     Hi Guys  Today we will create a service which will start after every hour ,
So we can use such service to fetch  or updated data from web to our app.

Here is simple example.

Service Started

Service Running Background

Steps to Create:

1.) Open Eclipse. Use the New Project Wizard and select Android Project Give the respective project name and other things.

Create simple Layout 

activity_main.xml

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <Button

        android:id="@+id/stopBtn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentBottom="true"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="155dp"

        android:text="Stop" />

    <Button

        android:id="@+id/startBtn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/stopBtn"

        android:layout_alignLeft="@+id/stopBtn"

        android:layout_marginBottom="41dp"

        android:text="start" />

</RelativeLayout>

In MainActivity.java  copy Paste  following  code 

public class MainActivity extends Activity {

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              // Start service using AlarmManager

              Calendar cal = Calendar.getInstance();

              cal.add(Calendar.SECOND, 10);

             

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

      

              PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);

             

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

              //for 30 mint 60*60*1000

              alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),

                           60*60*1000, pintent);

              Button startBtn = (Button) findViewById(R.id.startBtn);

              startBtn.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           startService(new Intent(getBaseContext(), TestService.class));

                     }

              });

              Button stopBtn = (Button) findViewById(R.id.stopBtn);

              stopBtn.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View v) {

                           // TODO Auto-generated method stub

                           stopService(new Intent(getBaseContext(), TestService.class));

                     }

              });

       }

}

and here is your Service code 

TestService.java

public class TestService extends Service {

       @Override

       public IBinder onBind(Intent intent) {

              // TODO: Return the communication channel to the service.

              throw new UnsupportedOperationException("Not yet implemented");

       }

       @Override

       public void onCreate() {

              // TODO Auto-generated method stub

              Toast.makeText(getApplicationContext(), "Service Created", 1).show();

              super.onCreate();

       }

       @Override

       public void onDestroy() {

              // TODO Auto-generated method stub

              Toast.makeText(getApplicationContext(), "Service Destroy", 1).show();

              super.onDestroy();

       }

       @Override

       public int onStartCommand(Intent intent, int flags, int startId) {

              // TODO Auto-generated method stub

              Toast.makeText(getApplicationContext(), "Service Running ", 1).show();

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

       }

}

one more thing to be done is that you will have to declare the service in the manifest to make it functional.

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

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

    package="com.example.alarmservice"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="17" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.example.alarmservice.MainActivity"

            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="com.example.alarmservice.TestService"            android:enabled="true"            android:exported="true" >        </service>

    </application>

</manifest>

you can download complete example here, 

Click Download

Happy Codding :)