BroadCast Receiver

 BroadCast Receiver is also called as "Communicate Collector". It is a component.

A communicate collector is an Android segment which permits to enlist and listen for gadget introduction changes like sms message received , telephone call received/pick/cut ,battery status changed, the Wi-Fi went ahead.

Android working framework and even different applications time to time communicate messages about things that are occurring like sms messsage recieved , telephone call recieved/pick/cut ,battery status changed, the Wi-Fi went ahead.

With the assistance of communicate recipient you will find Android working framework particular occasions and after that you can code your application for that occasion.

Example :-
                      Your Battery Getting low.
                      Your Phone has suddenly Turn off.
                      Your Battery 10% to 20% remaining.
                      Image Capture also broadcast receiver.

Syntax :-
                In android mainfest.xml,

                   <receiver android:name="MainActivity">  
                   <intent-filter>
                    <action android:name="com.kiranapp.BroadCast Receiver">
                    </action>
                    </intent-filter>  
                  </receiver>

          In MainActivity.java,

               public class MainActivity extends Broadcast Receiver
              {
                 public void onReceive(Context context, Intent intent)
                  {
                  }
              }
   
  Example Code for BroadCast Receiver  shownbelow.

activity_main.xml :-

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

<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" 

 tools:context="com.kiranapp.MainActivity" 

 android:background="#a69090">
<TextView 

 android:layout_width="wrap_content" 

 android:layout_height="wrap_content" 

 android:textAppearance="?android:attr/textAppearanceLarge" 

 android:text="Battert status is : " 

 android:id="@+id/textView" 

 android:layout_gravity="center_horizontal" 

 android:background="#f3ecec" />
</LinearLayout>

MainActivity.java :-

package com.kiranapp;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
 TextView t1;

@Override 

 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 t1=(TextView)findViewById(R.id.textView);
 registerReceiver(new MyBro(),new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
 }
class MyBro extends BroadcastReceiver{
@Override 

 public void onReceive(Context context, Intent intent) {
 int bstatus=intent.getIntExtra("level",0);
 t1.setText("Battery Status is : "+bstatus);
 }
 }
}

Output :-

BroadCast Receiver Figure