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!!

Uninstall App programmatically in Android

Today we will learn How to an Android Application can Uninstall itself Programmatically


Note:  here we need to pass package name in URI
so we are passing package name in which main/default/startup Activity Present
that we also define in manifest file at top level

Okay let's try this simple app

 -------------------------------------------
App Name: UninstallApp
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default Activity Name: UninstallAppActivity
-------------------------------------------


UninstallAppActivity.java

package com.rdc;

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

public class UninstallAppActivity extends Activity {
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  Button btn = (Button) findViewById(R.id.button1);
  btn.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View v) {
    Uri packageUri = Uri.parse("package:com.rdc");
    Intent uninstallIntent = new Intent(Intent.ACTION_DELETE,
      packageUri);
    startActivity(uninstallIntent);
   }
  });
 }
}

main.xml

AndroidManifest.xml

The output Screen will be like this..

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

 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!!