diff --git a/chapter03_fragment/app/src/main/res/layout/activity_main.xml b/chapter03_fragment/app/src/main/res/layout/activity_main.xml
new file mode 100644
index 0000000..4fc2444
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/activity_main.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Hello World!"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/category_detail.xml b/chapter03_fragment/app/src/main/res/layout/category_detail.xml
new file mode 100644
index 0000000..476b522
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/category_detail.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <GridView
+        android:id="@+id/category_detail_list"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:numColumns="3"
+        android:verticalSpacing="10dp"
+        android:horizontalSpacing="10dp"
+        android:gravity="center"/>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/category_list_item.xml b/chapter03_fragment/app/src/main/res/layout/category_list_item.xml
new file mode 100644
index 0000000..2187312
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/category_list_item.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/categor_titles"
+        android:layout_width="match_parent"
+        android:gravity="center"
+        android:layout_height="wrap_content"
+        android:textSize="18sp"
+        android:text="标题" />
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/categoty_detail_content.xml b/chapter03_fragment/app/src/main/res/layout/categoty_detail_content.xml
new file mode 100644
index 0000000..a46be2c
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/categoty_detail_content.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/category_product_image"
+        android:layout_width="90dp"
+        android:layout_height="90dp"
+        android:layout_gravity="center" />
+
+    <TextView
+        android:id="@+id/category_product_name"
+        android:layout_width="wrap_content"
+        android:layout_height="30dp"
+        android:layout_gravity="center"
+        android:layout_marginTop="2dp"
+        android:textColor="#050505"
+        android:textSize="16sp" />
+
+    <TextView
+        android:id="@+id/category_product_price"
+        android:layout_width="wrap_content"
+        android:layout_height="30dp"
+        android:layout_gravity="center"
+        android:layout_marginTop="2dp"
+        android:gravity="center"
+        android:textColor="#050505"
+        android:textSize="16sp" />
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/content_category.xml b/chapter03_fragment/app/src/main/res/layout/content_category.xml
new file mode 100644
index 0000000..9f889bc
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/content_category.xml
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#E8E8E8"
+    android:orientation="vertical">
+
+    <!--标题-->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:background="#EFB81C"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:id="@+id/category_return"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_left" />
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:text="农作物种类"
+            android:textColor="#FFF"
+            android:textSize="20sp" />
+    </LinearLayout>
+
+    <!--分类标题和内容-->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+        <!--标题-->
+        <ListView
+            android:id="@+id/category_title_list"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="match_parent" />
+        <!--内容-->
+        <FrameLayout
+            android:id="@+id/category_detail"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="3" />
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/content_user.xml b/chapter03_fragment/app/src/main/res/layout/content_user.xml
new file mode 100644
index 0000000..0338871
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/content_user.xml
@@ -0,0 +1,234 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/one"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/user_icon"
+        android:layout_width="wrap_content"
+        android:layout_height="150dp"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="60dp"
+        android:src="@drawable/user_icon" />
+
+    <!--卡券-->
+    <LinearLayout
+        android:id="@+id/user_pay"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="40dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/user_pay"
+            android:textColor="#000"
+            android:text="卡券"
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+    </LinearLayout>
+
+    <!--账号-->
+    <LinearLayout
+        android:id="@+id/user_username_line"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="30dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/user_username"
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/user_account"
+            android:textColor="#000"
+            android:text="账号："
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <!--性别-->
+    <LinearLayout
+        android:id="@+id/user_sex_line"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="1dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/user_sex"
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:layout_marginLeft="5dp"
+            android:drawableLeft="@drawable/user_sex"
+            android:textColor="#000"
+            android:text="城市："
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <!--城市-->
+    <LinearLayout
+        android:id="@+id/user_city_line"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="1dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:id="@+id/user_city"
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/city"
+            android:textColor="#000"
+            android:text="城市："
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <!--通用-->
+    <LinearLayout
+        android:id="@+id/user_general"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="20dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/user_general"
+            android:textColor="#000"
+            android:text="通用"
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <!--查看商品-->
+    <LinearLayout
+        android:id="@+id/user_searchProduct"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="20dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/search"
+            android:textColor="#000"
+            android:text="查看商品"
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <!--设置-->
+    <LinearLayout
+        android:id="@+id/user_setting"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="#FFF"
+        android:layout_marginTop="20dp"
+        android:orientation="horizontal">
+
+        <TextView
+            android:layout_height="35dp"
+            android:layout_weight="1"
+            android:drawableLeft="@drawable/setting"
+            android:textColor="#000"
+            android:text="设置"
+            android:gravity="center_vertical"
+            android:drawablePadding="8dp"
+            android:textSize="14sp"
+            android:layout_marginLeft="5dp"
+            android:layout_width="0dp" />
+
+        <ImageView
+            android:layout_width="25dp"
+            android:layout_height="25dp"
+            android:layout_gravity="center"
+            android:src="@drawable/arrow_right" />
+
+    </LinearLayout>
+
+    <Button
+        android:layout_width="fill_parent"
+        android:layout_height="60dp"
+        android:layout_marginLeft="10dp"
+        android:layout_marginRight="10dp"
+        android:textSize="18sp"
+        android:layout_marginTop="50dp"
+        android:text="退出登录"
+        android:textColor="#FFFFFF"
+        android:layout_gravity="center"
+        android:background="@drawable/button_login"/>
+
+
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/user_login.xml b/chapter03_fragment/app/src/main/res/layout/user_login.xml
new file mode 100644
index 0000000..c5dfdaa
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/user_login.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="@drawable/one">
+
+    <!--APPLogo及名字-->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="40dp"
+        android:orientation="vertical">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="200dp"
+            android:layout_marginTop="30dp"
+            android:layout_gravity="center_horizontal"
+            android:src="@drawable/logo" />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="22sp"
+            android:textColor="#000000"
+            android:textStyle="italic"
+            android:text="heartwarming farmer" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="50dp"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/user" />
+
+        <EditText
+            android:id="@+id/username"
+            android:layout_width="270dp"
+            android:layout_height="60dp"
+            android:textAlignment="center"
+            android:maxLength="10"
+            android:maxLines="1"
+            android:hint="username" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/password" />
+        <EditText
+            android:id="@+id/password"
+            android:layout_width="270dp"
+            android:layout_height="60dp"
+            android:inputType="textPassword"
+            android:textAlignment="center"
+            android:maxLength="16"
+            android:maxLines="1"
+            android:hint="password" />
+
+    </LinearLayout>
+
+    <Button
+        android:id="@+id/login"
+        android:layout_width="250dp"
+        android:layout_height="50dp"
+        android:textSize="18sp"
+        android:layout_gravity="center_horizontal"
+        android:layout_marginTop="60dp"
+        android:background="@drawable/button_login"
+        android:textColor="#FFFFFF"
+        android:text="登&#160;&#160;&#160;&#160;&#160;录" />
+
+    <Button
+        android:id="@+id/register"
+        android:layout_width="250dp"
+        android:layout_height="50dp"
+        android:layout_marginTop="10dp"
+        android:textSize="18sp"
+        android:layout_gravity="center_horizontal"
+        android:background="@drawable/button_register"
+        android:textColor="#FFFFFF"
+        android:text="注&#160;&#160;&#160;&#160;&#160;册" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/chapter03_fragment/app/src/main/res/layout/user_register.xml b/chapter03_fragment/app/src/main/res/layout/user_register.xml
new file mode 100644
index 0000000..10c6385
--- /dev/null
+++ b/chapter03_fragment/app/src/main/res/layout/user_register.xml
@@ -0,0 +1,169 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:background="@drawable/one">
+
+    <!--APPLogo及名字-->
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="20dp"
+        android:orientation="vertical">
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="200dp"
+            android:layout_marginTop="40dp"
+            android:layout_gravity="center_horizontal"
+            android:src="@drawable/logo" />
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="22sp"
+            android:textColor="#000000"
+            android:textStyle="italic"
+            android:text="heartwarming farmer" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="30dp"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/user" />
+
+        <EditText
+            android:id="@+id/reg_username"
+            android:layout_width="290dp"
+            android:layout_height="60dp"
+            android:textAlignment="center"
+            android:maxLength="10"
+            android:maxLines="1"
+            android:hint="用户名&#160;10位" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/password" />
+        <EditText
+            android:id="@+id/reg_password"
+            android:layout_width="290dp"
+            android:layout_height="60dp"
+            android:inputType="textPassword"
+            android:textAlignment="center"
+            android:maxLength="16"
+            android:maxLines="1"
+            android:hint="密码&#160;6-16位" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/sure_apssword" />
+        <EditText
+            android:id="@+id/reg_sure_password"
+            android:layout_width="290dp"
+            android:layout_height="60dp"
+            android:inputType="textPassword"
+            android:textAlignment="center"
+            android:maxLength="16"
+            android:maxLines="1"
+            android:hint="确认密码" />
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="10dp"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/sex" />
+        <RadioGroup
+            android:id="@+id/sex"
+            android:layout_width="270dp"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+            <RadioButton
+                android:id="@+id/reg_man"
+                android:layout_width="wrap_content"
+                android:checked="true"
+                android:layout_height="wrap_content"
+                android:text="男"/>
+            <RadioButton
+                android:id="@+id/reg_woman"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="女"/>
+        </RadioGroup>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center_horizontal"
+        android:layout_marginTop="10dp"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:layout_width="30dp"
+            android:layout_height="30dp"
+            android:layout_gravity="center_vertical"
+            android:src="@drawable/address" />
+
+        <TextView
+            android:id="@+id/reg_province"
+            android:layout_width="290dp"
+            android:layout_height="60dp"
+            android:gravity="center"
+            android:maxLength="20"
+            android:maxLines="1"
+            android:drawableRight="@drawable/arrow_down"
+            android:hint="地址选择" />
+
+    </LinearLayout>
+
+
+    <Button
+        android:id="@+id/reg_register"
+        android:layout_width="280dp"
+        android:layout_height="50dp"
+        android:layout_marginTop="20dp"
+        android:textSize="18sp"
+        android:layout_gravity="center_horizontal"
+        android:background="@drawable/button_login"
+        android:textColor="#FFFFFF"
+        android:text="注&#160;&#160;&#160;&#160;&#160;册" />
+
+</LinearLayout>
\ No newline at end of file