Merge pull request #301 from claixiang/master

#4 #67 第四次作业

Author: zengsn

AndroidLabs/app/src/main/res/layout/activity_net1414080903108.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
     <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:tools="http://schemas.android.com/tools"
         android:layout_width="match_parent"
@@ -14,5 +14,27 @@
             android:layout_alignParentBottom="true"
             android:layout_alignParentLeft="true"
             android:layout_alignParentStart="true" />
-    </RelativeLayout>
+
+    <Button
+        android:text="保存"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/button2"
+        android:layout_marginRight="49dp"
+        android:layout_marginEnd="49dp"
+        android:layout_alignParentBottom="true"
+        android:layout_toLeftOf="@+id/button"
+        android:layout_toStartOf="@+id/button" />
+
+    <Button
+        android:text="清除"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/button"
+        android:layout_marginRight="86dp"
+        android:layout_marginEnd="86dp"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentEnd="true" />
+</RelativeLayout>