Inflate Layout from activity that is not it's parent

I have two Activities:

1. EntryActivity


2. chatMessages

In the past I was setContentView() in onCreate(...) of the chatMessages Activity, & I was pass a parameter Like (R.layout.messenger) (inflating is expensive process") but, because I use chatMessages offten I decide to Inflate messenger.XML in another activity (EntryActivity) Like this

public class EntryActivity extends FragmentActivity{
     public static View ChatView;
    .....
    .....
    LayoutInflater  inflater = getLayoutInflater();
    ChatView= inflater.inflate(R.layout.messenger, null);
    ....
    }

and in chatMessages I do:

setContentView(EntryActivity.ChatView); // NOW NO NEED FOR INFLATING 

after this change its work "fine" but all the ("OnClick" handlers) in my messenger.xml looking for "thier" methods in Entryavtivity instead chatMessages Activity. example : in messenger.xml

<ImageButton
                    android:layout_width="42dp"
                    android:layout_height="42dp"
                    android:id="@+id/imageButton"
                    android:padding="5dp"
                    android:layout_margin="5dp"
                    android:onClick="pickMedia"
                    android:background="@drawable/headertop"
                    android:src="@drawable/attt"
                    android:scaleType="fitCenter" /> 

When I tab the Button I get this message: Could not find a method show_smily(View) in the activity .EntryActivity

but the onclick handler (pickMedia(){...}) is exist in ChatConversation Activity. and the messenger.xml associated to ChatConversation Activity:

tools:context="com.Esmaeel.chatMessages">

and in design view is see that the layout associated to chatMessages:

I dont want to move all the events handlers to EntryActivity How may I make the app look for the handler in chatMessages???