~ Android layout editText placeholder and background image ~

<EditText
    android:id="@+id/editText2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="textPersonName"
    android:background="@drawable/text_field_bg"
    android:padding="5dp"
    android:hint="請輸入帳號(4-16英數)"/>