Java Studio

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="nombre dettupaquete"> <Button android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="onClickMostrarFecha" android:text="FECHA" android:id="@+id/btFecha"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/etFecha" /> </RelativeLayout>