diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/src/main/res/drawable-hdpi/course_detail_list_icon.png b/app/src/main/res/drawable-hdpi/course_detail_list_icon.png
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index 0000000..231bc85
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diff --git a/app/src/main/res/drawable-hdpi/course_history_icon.png b/app/src/main/res/drawable-hdpi/course_history_icon.png
new file mode 100644
index 0000000..a597342
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diff --git a/app/src/main/res/drawable-hdpi/course_intro_icon.png b/app/src/main/res/drawable-hdpi/course_intro_icon.png
new file mode 100644
index 0000000..60b8a2b
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diff --git a/app/src/main/res/drawable-hdpi/default_icon.png b/app/src/main/res/drawable-hdpi/default_icon.png
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index 0000000..8a585b7
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diff --git a/app/src/main/res/drawable-hdpi/default_img.png b/app/src/main/res/drawable-hdpi/default_img.png
new file mode 100644
index 0000000..e30ac05
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diff --git a/app/src/main/res/drawable-hdpi/default_video_list_icon.png b/app/src/main/res/drawable-hdpi/default_video_list_icon.png
new file mode 100644
index 0000000..b8f413d
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diff --git a/app/src/main/res/drawable-hdpi/exercises_a.png b/app/src/main/res/drawable-hdpi/exercises_a.png
new file mode 100644
index 0000000..d3a9d03
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diff --git a/app/src/main/res/drawable-hdpi/exercises_b.png b/app/src/main/res/drawable-hdpi/exercises_b.png
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index 0000000..f4f3dac
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diff --git a/app/src/main/res/drawable-hdpi/exercises_bg_1.png b/app/src/main/res/drawable-hdpi/exercises_bg_1.png
new file mode 100644
index 0000000..055e621
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diff --git a/app/src/main/res/drawable-hdpi/exercises_bg_2.png b/app/src/main/res/drawable-hdpi/exercises_bg_2.png
new file mode 100644
index 0000000..f355d84
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diff --git a/app/src/main/res/drawable-hdpi/exercises_bg_3.png b/app/src/main/res/drawable-hdpi/exercises_bg_3.png
new file mode 100644
index 0000000..079b9d0
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diff --git a/app/src/main/res/drawable-hdpi/exercises_bg_4.png b/app/src/main/res/drawable-hdpi/exercises_bg_4.png
new file mode 100644
index 0000000..a663334
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/exercises_bg_4.png differ
diff --git a/app/src/main/res/drawable-hdpi/exercises_c.png b/app/src/main/res/drawable-hdpi/exercises_c.png
new file mode 100644
index 0000000..8cb74e9
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diff --git a/app/src/main/res/drawable-hdpi/exercises_d.png b/app/src/main/res/drawable-hdpi/exercises_d.png
new file mode 100644
index 0000000..16190f7
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diff --git a/app/src/main/res/drawable-hdpi/exercises_error_icon.png b/app/src/main/res/drawable-hdpi/exercises_error_icon.png
new file mode 100644
index 0000000..97efc11
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diff --git a/app/src/main/res/drawable-hdpi/exercises_right_icon.png b/app/src/main/res/drawable-hdpi/exercises_right_icon.png
new file mode 100644
index 0000000..17b8777
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/exercises_right_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/find_psw_icon.png b/app/src/main/res/drawable-hdpi/find_psw_icon.png
new file mode 100644
index 0000000..f15e799
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/find_psw_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/info_delete.png b/app/src/main/res/drawable-hdpi/info_delete.png
new file mode 100644
index 0000000..c02cf9f
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/info_delete.png differ
diff --git a/app/src/main/res/drawable-hdpi/iv_back.png b/app/src/main/res/drawable-hdpi/iv_back.png
new file mode 100644
index 0000000..bdc95b9
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/iv_back.png differ
diff --git a/app/src/main/res/drawable-hdpi/iv_back_selected.png b/app/src/main/res/drawable-hdpi/iv_back_selected.png
new file mode 100644
index 0000000..890b4cf
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/iv_back_selected.png differ
diff --git a/app/src/main/res/drawable-hdpi/iv_right_arrow.png b/app/src/main/res/drawable-hdpi/iv_right_arrow.png
new file mode 100644
index 0000000..8cf50a6
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/iv_right_arrow.png differ
diff --git a/app/src/main/res/drawable-hdpi/login_bg.png b/app/src/main/res/drawable-hdpi/login_bg.png
new file mode 100644
index 0000000..b90f11e
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/login_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/login_psw_bg.png b/app/src/main/res/drawable-hdpi/login_psw_bg.png
new file mode 100644
index 0000000..3588c19
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/login_psw_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/login_user_name_bg.png b/app/src/main/res/drawable-hdpi/login_user_name_bg.png
new file mode 100644
index 0000000..fc68fb6
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/login_user_name_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_course_icon.png b/app/src/main/res/drawable-hdpi/main_course_icon.png
new file mode 100644
index 0000000..037f565
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_course_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_course_icon_selected.png b/app/src/main/res/drawable-hdpi/main_course_icon_selected.png
new file mode 100644
index 0000000..e1fae4d
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_course_icon_selected.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_exercises_icon.png b/app/src/main/res/drawable-hdpi/main_exercises_icon.png
new file mode 100644
index 0000000..dedf6e7
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_exercises_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_exercises_icon_selected.png b/app/src/main/res/drawable-hdpi/main_exercises_icon_selected.png
new file mode 100644
index 0000000..10c61b4
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_exercises_icon_selected.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_my_icon.png b/app/src/main/res/drawable-hdpi/main_my_icon.png
new file mode 100644
index 0000000..8edc364
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_my_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/main_my_icon_selected.png b/app/src/main/res/drawable-hdpi/main_my_icon_selected.png
new file mode 100644
index 0000000..d5ff4db
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/main_my_icon_selected.png differ
diff --git a/app/src/main/res/drawable-hdpi/myinfo_login_bg.png b/app/src/main/res/drawable-hdpi/myinfo_login_bg.png
new file mode 100644
index 0000000..9df3158
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/myinfo_login_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/myinfo_setting_icon.png b/app/src/main/res/drawable-hdpi/myinfo_setting_icon.png
new file mode 100644
index 0000000..6cdf472
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/myinfo_setting_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/psw_icon.png b/app/src/main/res/drawable-hdpi/psw_icon.png
new file mode 100644
index 0000000..404fc81
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/psw_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_bg.png b/app/src/main/res/drawable-hdpi/register_bg.png
new file mode 100644
index 0000000..8ab9b05
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_icon_normal.png b/app/src/main/res/drawable-hdpi/register_icon_normal.png
new file mode 100644
index 0000000..4ff827c
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_icon_normal.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_icon_selected.png b/app/src/main/res/drawable-hdpi/register_icon_selected.png
new file mode 100644
index 0000000..1a8e715
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_icon_selected.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_psw_again_bg.png b/app/src/main/res/drawable-hdpi/register_psw_again_bg.png
new file mode 100644
index 0000000..ba6e1b3
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_psw_again_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_psw_bg.png b/app/src/main/res/drawable-hdpi/register_psw_bg.png
new file mode 100644
index 0000000..705160e
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_psw_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/register_user_name_bg.png b/app/src/main/res/drawable-hdpi/register_user_name_bg.png
new file mode 100644
index 0000000..00957bf
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/register_user_name_bg.png differ
diff --git a/app/src/main/res/drawable-hdpi/user_name_icon.png b/app/src/main/res/drawable-hdpi/user_name_icon.png
new file mode 100644
index 0000000..f842845
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/user_name_icon.png differ
diff --git a/app/src/main/res/drawable-hdpi/video_list_intro_blue.png b/app/src/main/res/drawable-hdpi/video_list_intro_blue.png
new file mode 100644
index 0000000..02f904d
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/video_list_intro_blue.png differ
diff --git a/app/src/main/res/drawable-hdpi/video_list_intro_white.png b/app/src/main/res/drawable-hdpi/video_list_intro_white.png
new file mode 100644
index 0000000..242f114
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/video_list_intro_white.png differ
diff --git a/app/src/main/res/drawable/go_back_selector.xml b/app/src/main/res/drawable/go_back_selector.xml
new file mode 100644
index 0000000..dae0020
--- /dev/null
+++ b/app/src/main/res/drawable/go_back_selector.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@drawable/iv_back_selected" android:state_pressed="true" />
+    <item android:drawable="@drawable/iv_back" android:state_pressed="false" />
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/main_title_bar.xml b/app/src/main/res/layout/main_title_bar.xml
new file mode 100644
index 0000000..4c14c7a
--- /dev/null
+++ b/app/src/main/res/layout/main_title_bar.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/title_bar"
+    android:layout_width="match_parent"
+    android:layout_height="50dp"
+    android:background="@android:color/transparent">
+
+    <TextView
+        android:id="@+id/tv_back"
+        android:layout_width="50dp"
+        android:layout_height="50dp"
+        android:layout_alignParentLeft="true"
+        android:layout_centerVertical="true"
+        android:background="@drawable/go_back_selector" />
+
+    <TextView
+        android:id="@+id/tv_main_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerVertical="true"
+        android:textColor="@color/white"
+        android:textSize="20sp" />
+
+
+</RelativeLayout>
\ No newline at end of file