Start BroadcastReceiver from Activity

Some time we need to start a service from Android Activity..
how can we achieve this i am going to write step by step.

We will create very simple app to do this work
 -------------------------------------------
App Name: Activity2BReceiver
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default Activity Name: MyActivity
-------------------------------------------


MyActivity.java

  
package com.rdc;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class MyActivity extends Activity {   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.v("Debug", "Activity has been started..");
    }
}

Then Create a Broadcast Receiver

MyReceiver.java

  
package com.rdc;

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

public class MyReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
  Log.v("Debug", "SMS Broadcast Receiver has been started..");
  Toast.makeText(context, "BReceiver is watching ur message..", 
    Toast.LENGTH_SHORT).show();

 }

}

main.xml

<?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"
    />
</LinearLayout>

Don't forget to make entry in "Manifest" file for Receiver

  
<?xml version="1.0" encoding="utf-8"?>
<manifest
 xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.rdc"
 android:versionCode="1"
 android:versionName="1.0">
 <uses-sdk android:minSdkVersion="10" />
 <uses-permission android:name="android.permission.RECEIVE_SMS">
 </uses-permission>
 <application
  android:icon="@drawable/icon"
  android:label="@string/app_name">
  <activity
   android:name=".MyActivity"
   android:label="@string/app_name">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />
   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
  </activity>
  <receiver android:name="com.rdc.MyReceiver">

   <intent-filter>
  <action android:name="android.provider.Telephony.SMS_RECEIVED" />
   </intent-filter>
  </receiver>

 </application>
</manifest>

Run this app and send message from another mobile/emulator, Receiver will notify you about new sms
See below output screens tensted on Emulator and Real Device

You can download the complete source code zip file here : Activity2BReceiver


I'd love to hear your thoughts!

Start Service from Broadcast Receiver

Some time we need to start Service from Broadcast Receiver..
how can we achieve this i am going to write step by step.

So lets create a small App to do this things 

-------------------------------------------
App Name: BReceiver2Service
Package Name: com.rdc
Android SDK: Android SDK 2.2 / API 8
-------------------------------------------

MyReceiver.java 

package com.rdc;

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

public class MyReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
  
  Toast.makeText(context, "MyReceiver Started", 
    Toast.LENGTH_SHORT).show();
  Log.v("Info Message", "in Broadcast receiver");
  Intent myIntent=new Intent(context,MyService.class);  
  context.startService(myIntent);
 }

}

MyService

package com.rdc;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;

public class MyService extends Service {

 @Override
 public IBinder onBind(Intent intent) {  
  return null;
 }
 
 @Override
 public int onStartCommand(Intent intent, int flags, int startId){
  Toast.makeText(getBaseContext(), "Service Started",
    Toast.LENGTH_SHORT).show();
 /* We want this service to continue running until it is explicitly
       stopped, so return sticky. */
        return START_STICKY;  
 }
}

main.xml

<?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" />
</LinearLayout>

AndroidManifest.xml

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

 <application
  android:icon="@drawable/icon"
  android:label="@string/app_name">
  <service
   android:enabled="true"
   android:name=".MyService">
   <intent-filter>
    <action android:name="com.rdc.MyService">
    </action>
   </intent-filter>
  </service>
  <receiver
  android:enabled="true"
  android:name=".MyReceiver">
  <intent-filter>
  <action android:name="android.intent.action.BOOT_COMPLETED" />
  </intent-filter>
  </receiver>
 </application>

</manifest>

Now Reboot Emulator, Toast will appear.

you can download zip file from here : BReceiver2Service

cheers!!

 I'd love to hear your thoughts!!

Start Activity from Broadcast Recevier

Some time we need to start an Activity from Broadcast Receiver..
how can we achieve this i am going to write step by step.

So lets create a small App to do this things 

-------------------------------------------
App Name: BReceiver2Activity
Package Name: com.rdc
Android SDK: Android SDK 2.2 / API 8
-------------------------------------------

MyReceiver.java

package com.rdc;

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

public class MyReceiver extends BroadcastReceiver {

 @Override
 public void onReceive(Context context, Intent intent) {
  
  Toast.makeText(context, "MyReceiver Started", 
    Toast.LENGTH_SHORT).show();
  Log.v("Info Message", "in Broadcast receiver");
  Intent myIntent=new Intent(context,MyActivity.class); 
  myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  context.startActivity(myIntent);
 }

}

MyActivity.java

package com.rdc;

import android.app.Activity;
import android.os.Bundle;

public class MyActivity extends Activity {

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

 }
}

main.xml

<?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"
 android:weightSum="1">
 <TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello"
  android:layout_weight="0.14" />
</LinearLayout>

AndroidManifest.xml

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

 <application
  android:icon="@drawable/icon"
  android:label="@string/app_name">

  <activity
   android:enabled="true"
   android:name=".MyActivity">
   <intent-filter>
    <action android:name="com.rdc.MyActivity">
    </action>
   </intent-filter>
  </activity>

  <receiver
    android:enabled="true"
    android:name=".MyReceiver">
    <intent-filter>
    <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
  </receiver>

 </application>
</manifest>

Now Reboot Emulator, Activity will appear on start-up.

You can download source code here: BReceiver2Activity

cheers!!

I'd love to hear your thoughts!!

Listening incoming sms message in Android

The following code shows "how to get notification when android mobile receive a message"

We will use only Broadcast Receiver's method not any URI query or something else.


So let's create a simple android app, then delete default Activity and create new java class
which extends Broadcast-receiver  look like this

SMSNotification.java

  
package com.rdc;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;


public class SMSNotification extends BroadcastReceiver {
  
  @Override
  public void onReceive(Context context, Intent intent) {  
  
  Toast.makeText(context,"Wow! we got a Message :)",Toast.LENGTH_SHORT).show();
  
 Bundle bundle = intent.getExtras();
 SmsMessage[] msgs = null;
 String str = "";
 if(bundle != null){
  Object[] pdus = (Object[]) bundle.get("pdus");
  msgs = new SmsMessage[pdus.length];
  for(int i=0; i<msgs.length;i++){
   msgs[i]= SmsMessage.createFromPdu((byte[])pdus[i]);
   str += "SMS from: " +msgs[i].getOriginatingAddress();
   str +="\n"+"Message is:";
   str += msgs[i].getMessageBody().toString();
   str +="\n";
  }
  
  Log.v("Debug", str);
  Toast.makeText(context, str, Toast.LENGTH_SHORT).show();
 } 
   }
}

AndroidManifest.xml

output is like this

cheers!!

I'd love to hear your thoughts!