BroadCast in android

Ref:

http://www.javacodegeeks.com/2012/08/android-broadcast-receiver-enable-and.html


activity_brord_casting.xml
----------------------------
<LinearLayout 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:orientation='vertical'>

     <Button
        android:layout_width='fill_parent'
        android:layout_height='wrap_content'
        android:padding='10dip'
        android:text='@string/start_repeating_alarm'
        android:onClick='startRepeatingAlarm'
        tools:context='.EnableDisableBroadcastReceiver' />
     <Button
       android:layout_width='fill_parent'
       android:layout_height='wrap_content'
       android:padding='10dip'
       android:text='@string/cancel_alarm'
       android:onClick='cancelAlarm'
       tools:context='.EnableDisableBroadcastReceiver' />
    
    <Button
        android:layout_width='fill_parent'
        android:layout_height='wrap_content'
        android:padding='10dip'
        android:text='@string/enable_broadcast_receiver'
        android:onClick='enableBroadcastReceiver'
        tools:context='.EnableDisableBroadcastReceiver' />
   <Button
       android:layout_width='fill_parent'
       android:layout_height='wrap_content'
       android:padding='10dip'
       android:text='@string/disable_broadcast_receiver'
       android:onClick='disableBroadcastReceiver'
       tools:context='.EnableDisableBroadcastReceiver' />
      
</LinearLayout>


BrordCastingActivity.Java
-----------------------------

package com.example.broadcastingexample;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.view.View;
import android.widget.Toast;

public class BrordCastingActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_brord_casting);
    }
       /**
     * This method gets called when 'Start Repeating Alarm' button is pressed.
     * It sets the repeating alarm whose periodicity is 3 seconds.
     * @param view
     */
    public void startRepeatingAlarm(View view)
    {
        AlarmManager am=(AlarmManager)this.getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, AlarmManagerBroadcastReceiver.class);
        PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, 0);
        //After after 2 seconds
        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 4 , pi);
        Toast.makeText(this, "Started Repeating Alarm", Toast.LENGTH_SHORT).show();
    }
 /**
  * This method gets called when 'cancel Alarm' button is pressed.
  * This method cancels the previously set repeating alarm.
  * @param view
  */
    public void cancelAlarm(View view)
    {
        Intent intent = new Intent(this, AlarmManagerBroadcastReceiver.class);
        PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, 0);
        AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
        alarmManager.cancel(sender);
        Toast.makeText(this, "Cancelled alarm", Toast.LENGTH_SHORT).show();
    }
    /**
     * This method enables the Broadcast receiver registered in the AndroidManifest file.
     * @param view
     */
   public void enableBroadcastReceiver(View view){
    ComponentName receiver = new ComponentName(this, AlarmManagerBroadcastReceiver.class);
    PackageManager pm = this.getPackageManager();

    pm.setComponentEnabledSetting(receiver,
            PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
            PackageManager.DONT_KILL_APP);
    Toast.makeText(this, "Enabled broadcast receiver", Toast.LENGTH_SHORT).show();
   }
   /**
    * This method disables the Broadcast receiver registered in the AndroidManifest file.
    * @param view
    */
   public void disableBroadcastReceiver(View view){
    ComponentName receiver = new ComponentName(this, AlarmManagerBroadcastReceiver.class);
    PackageManager pm = this.getPackageManager();

    pm.setComponentEnabledSetting(receiver,
            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
            PackageManager.DONT_KILL_APP);
    Toast.makeText(this, "Disabled broadcst receiver", Toast.LENGTH_SHORT).show();
   }  
}


AlarmManagerBroadcastReceiver.Java
------------------------------------------

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;

public class AlarmManagerBroadcastReceiver extends BroadcastReceiver {

     final public static String ONE_TIME = "onetime";
     final private String tag="tag";
     @Override
     public void onReceive(Context context, Intent intent) {

              Log.i(tag, "msg");
             //You can do the processing here update the widget/remote views.
             StringBuilder msgStr = new StringBuilder();
             Log.i(tag, "msg2");
             //Format time.
             Format formatter = new SimpleDateFormat("hh:mm:ss a");
             Log.i(tag, "msg3");
             msgStr.append(formatter.format(new Date()));
             Log.i(tag, "msg4");

             Toast.makeText(context, msgStr, Toast.LENGTH_SHORT).show();
             Log.i(tag, "msg5");
                    
     }
}


androidmanitest

--------------------


<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.broadcastingexample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="10" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.broadcastingexample.BrordCastingActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
       
         <!-- Broadcast receiver -->
        <receiver android:name='com.example.broadcastingexample.AlarmManagerBroadcastReceiver' />
    </application>

</manifest>