1 <?xml version="1.0" encoding="utf-8"?> 2 3 <Button xmlns:android="http://schemas.android.com/apk/res/android" 4 android:onClick="sendMessage" 5 android:id="@+id/button" 6 android:layout_width="wrap_content" 7 android:layout_height="wrap_content"> 8 9 </Button>
