Android - insertar fecha,hora, y pequeño texto

<RelativeLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/relativelayout"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

    <ImageView

        android:id="@+id/myImageView"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:src="@drawable/myImageSouce" />

    <TextView

        android:id="@+id/myImageViewText"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignLeft="@+id/myImageView"

        android:layout_alignTop="@+id/myImageView"

        android:layout_alignRight="@+id/myImageView"

        android:layout_alignBottom="@+id/myImageView"

        android:layout_margin="1dp"

        android:gravity="center"

        android:text="Hello"

        android:textColor="#000000" />

</RelativeLayout>