How to Send BroadCast from one app to another app

First thing first declare the receiver in app B in the manifest file like this:

<receiver android:name=".MyBroadcastReceiver"
    android:enabled="true"
    android:exported="true">
        <intent-filter>
          <action android:name="com.pkg.perform.Ruby" />
        </intent-filter>
</receiver>

when sending the broadcast add FLAG_INCLUDE_STOPPED_PACKAGES flag to the intent [src] because when you broadcast from app A to app B , app B might not be running, this flag insures that the broadcast reachs out even apps not running:

FLAG_INCLUDE_STOPPED_PACKAGES flag is added to the intent before it
is sent to indicate that the intent is to be allowed to start a
component of a stopped application.

intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);

In your case it will be like this:

    final Intent intent=new Intent();
    intent.setAction("com.pkg.perform.Ruby");
    intent.putExtra("KeyName","code1id");
    intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES);
    intent.setComponent(  
        new ComponentName("com.pkg.AppB","com.pkg.AppB.MyBroadcastReceiver"));  
    sendBroadcast(intent);