Send data inside self-Activity

    <EditText
        android:id="@+id/etData"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ems="10"
        android:maxLength="25"
        android:inputType="text"
        android:hint="@string/hint_etData" >
        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/btData"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/name_btData"
        android:onClick="sendMessage" />

First, Install Eclipse, Java-ADT & SDK

Download this

Copy on folder, for example

           D:\Android\

Uncompress pack and create folder workspace:

Run SDK and configure:

Run eclipse

         menu Windows / Customize Perspective

         configuring toolbars

          now you've personalized the eclipse environment to android development. 

New android project 

         write the application name

         as demo project go through forms selecting next option until create activity type, then select fullscreen activity

         check if it's created the activity

         to see the result for default project, run it as android app

         after launching demo, select device and enjoy it.