diff --git a/soft1614080902215/test4/4.1.png b/soft1614080902215/test4/4.1.png
new file mode 100644
index 000000000..4c2b1c8d7
Binary files /dev/null and b/soft1614080902215/test4/4.1.png differ
diff --git a/soft1614080902215/test4/4.2.png b/soft1614080902215/test4/4.2.png
new file mode 100644
index 000000000..0651e8bc8
Binary files /dev/null and b/soft1614080902215/test4/4.2.png differ
diff --git a/soft1614080902215/test4/app/src/main/AndroidManifest.xml b/soft1614080902215/test4/app/src/main/AndroidManifest.xml
new file mode 100644
index 000000000..ca1ed9bee
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/AndroidManifest.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="androidlabs.hzuapps.edu.soft1614080902215">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".soft1614080902215MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".SecondActivity"
+            android:label="@string/title_activity_second"
+            android:theme="@style/AppTheme.NoActionBar"></activity>
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/SecondActivity.java b/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/SecondActivity.java
new file mode 100644
index 000000000..81504096c
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/SecondActivity.java
@@ -0,0 +1,19 @@
+package androidlabs.hzuapps.edu.soft1614080902215;
+
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+import android.*;
+public class SecondActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_second);
+
+    }
+
+}
diff --git a/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/soft1614080902215MainActivity.java b/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/soft1614080902215MainActivity.java
new file mode 100644
index 000000000..d0c4b8056
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/java/androidlabs/hzuapps/edu/soft1614080902215/soft1614080902215MainActivity.java
@@ -0,0 +1,29 @@
+package androidlabs.hzuapps.edu.soft1614080902215;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
+import org.w3c.dom.Text;
+public class soft1614080902215MainActivity extends AppCompatActivity {
+
+    private Button Button;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_soft1614080902215_main);
+
+        Button=(Button)findViewById(R.id.button);
+
+        Button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent=new Intent(soft1614080902215MainActivity.this,SecondActivity.class);
+                startActivity(intent);
+            }
+        });
+    }
+}
diff --git a/soft1614080902215/test4/app/src/main/res/drawable/calc2.jpg b/soft1614080902215/test4/app/src/main/res/drawable/calc2.jpg
new file mode 100644
index 000000000..7a3db944c
Binary files /dev/null and b/soft1614080902215/test4/app/src/main/res/drawable/calc2.jpg differ
diff --git a/soft1614080902215/test4/app/src/main/res/layout/activity_second.xml b/soft1614080902215/test4/app/src/main/res/layout/activity_second.xml
new file mode 100644
index 000000000..0f007ce2b
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/layout/activity_second.xml
@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="androidlabs.hzuapps.edu.soft1614080902215.SecondActivity">
+
+
+    <Button
+        android:id="@+id/科学计算器"
+        android:layout_width="185dp"
+        android:layout_height="250dp"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_alignParentTop="true"
+        android:text="科学计算器"
+        tools:ignore="MissingConstraints"
+        tools:layout_editor_absoluteX="0dp"
+        tools:layout_editor_absoluteY="0dp" />
+
+    <Button
+        android:id="@+id/时间转换"
+        android:layout_width="180dp"
+        android:layout_height="250dp"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentTop="true"
+        android:text="时间转换"
+        tools:ignore="MissingConstraints"
+        tools:layout_editor_absoluteX="208dp"
+        tools:layout_editor_absoluteY="0dp" />
+
+    <Button
+        android:id="@+id/长度转换"
+        android:layout_width="420dp"
+        android:layout_height="120dp"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_below="@+id/科学计算器"
+        android:text="长度转换"
+        tools:ignore="MissingConstraints"
+        tools:layout_editor_absoluteX="0dp"
+        tools:layout_editor_absoluteY="257dp" />
+
+    <Button
+        android:id="@+id/汇率计算"
+        android:layout_width="185dp"
+        android:layout_height="250dp"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:text="汇率计算"
+        tools:ignore="MissingConstraints"
+        tools:layout_editor_absoluteX="0dp"
+        tools:layout_editor_absoluteY="382dp" />
+
+    <Button
+        android:id="@+id/房贷计算"
+        android:layout_width="180dp"
+        android:layout_height="250dp"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:text="房贷计算"
+        tools:ignore="MissingConstraints"
+        tools:layout_editor_absoluteX="204dp"
+        tools:layout_editor_absoluteY="382dp" />
+</RelativeLayout>
\ No newline at end of file
diff --git a/soft1614080902215/test4/app/src/main/res/layout/activity_soft1614080902215_main.xml b/soft1614080902215/test4/app/src/main/res/layout/activity_soft1614080902215_main.xml
new file mode 100644
index 000000000..57750d3a0
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/layout/activity_soft1614080902215_main.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:orientation="vertical"
+    android:layout_height="match_parent"
+    tools:context="androidlabs.hzuapps.edu.soft1614080902215.soft1614080902215MainActivity">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="fill_parent"
+        android:layout_height="50dp"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_marginBottom="12dp"
+        android:text="Enter the calculator" />
+
+    <TextView
+        android:id="@+id/textview_01"
+        android:layout_width="wrap_content"
+        android:layout_height="607dp"
+        android:layout_alignBottom="@+id/button"
+        android:layout_alignParentLeft="true"
+        android:layout_alignParentStart="true"
+        android:layout_marginBottom="25dp"
+        android:drawableTop="@drawable/calc2" />
+
+</RelativeLayout>
diff --git a/soft1614080902215/test4/app/src/main/res/values/colors.xml b/soft1614080902215/test4/app/src/main/res/values/colors.xml
new file mode 100644
index 000000000..3ab3e9cbc
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/values/colors.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>
diff --git a/soft1614080902215/test4/app/src/main/res/values/dimens.xml b/soft1614080902215/test4/app/src/main/res/values/dimens.xml
new file mode 100644
index 000000000..59a0b0c4f
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/values/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>
diff --git a/soft1614080902215/test4/app/src/main/res/values/ids.xml b/soft1614080902215/test4/app/src/main/res/values/ids.xml
new file mode 100644
index 000000000..c15380b64
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/values/ids.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <item name="toolbar" type="id" />
+    <item name="fab" type="id" />
+</resources>
\ No newline at end of file
diff --git a/soft1614080902215/test4/app/src/main/res/values/strings.xml b/soft1614080902215/test4/app/src/main/res/values/strings.xml
new file mode 100644
index 000000000..f08bdc084
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/values/strings.xml
@@ -0,0 +1,4 @@
+<resources>
+    <string name="app_name">soft1614080902215</string>
+    <string name="title_activity_second">SecondActivity</string>
+</resources>
diff --git a/soft1614080902215/test4/app/src/main/res/values/styles.xml b/soft1614080902215/test4/app/src/main/res/values/styles.xml
new file mode 100644
index 000000000..545b9c6d2
--- /dev/null
+++ b/soft1614080902215/test4/app/src/main/res/values/styles.xml
@@ -0,0 +1,20 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>
diff --git a/soft1614080902215/test4/report4.md b/soft1614080902215/test4/report4.md
new file mode 100644
index 000000000..e006acd23
--- /dev/null
+++ b/soft1614080902215/test4/report4.md
@@ -0,0 +1,27 @@
+# 第四次实验
+
+## 1.实验目标
+（1）根据自选题目设计界面布局；
+
+（2）布局xml以及界面控制操作代码提交并截图； 
+
+（3）调试，将应用运行并截图。
+
+## 2.实验步骤
+（1）打开已建好的项目
+
+（2）在各个xml文件中添加RelativeLayout布局
+
+（3）构思界面布局，添加相应的控件
+
+（4）调试应用，运行成功并截图 
+
+（5）使用git上传本次实验文件
+
+## 3.实验结果
+![image](https://github.com/Zhenghizhong/android-labs-2018/blob/master/soft1614080902215/test4/4.1.png)
+![image](https://github.com/Zhenghizhong/android-labs-2018/blob/master/soft1614080902215/test4/4.2.png)
+
+## 4.实验体会
+
+通过本次实验，我了解到了各种布局的使用规律，由于对各种布局方式的不了解，我花费了很长的时间在挑选布局实现我自己想要的布局格式上，在之后的实验中，我会更加深入地了解各种布局的使用方法。