如何实现edittext四周边框

<EditText
android:hint="输入反馈意见,更多疑问请联系本公司客服人员"
android:textSize="16sp"
android:maxLength="25"
android:id="@+id/et_input"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="13.4dp"
android:background="@android:drawable/edit_text"
android:enabled="true"
android:gravity="top"
android:inputType="textMultiLine"
android:maxLines="10"
android:minLines="8"
android:scrollbars="vertical"
android:textCursorDrawable="@drawable/myedittext" />

android:background="@android:drawable/edit_text"

android:textCursorDrawable="@drawable/myedittext"

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<size android:width="2dp" />
<solid android:color="@color/blue_new"  />
</shape>