diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9fcd757..819bac1 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -10,6 +10,7 @@
         android:theme="@style/CjjBaseTheme">
         <activity
             android:name=".SplashActivity"
+            android:theme="@style/CjjBaseTheme.WhiteActivity"
             android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
diff --git a/app/src/main/java/com/example/blockcanary/DemoActivity.java b/app/src/main/java/com/example/blockcanary/DemoActivity.java
index 89b2650..9a4d7f1 100644
--- a/app/src/main/java/com/example/blockcanary/DemoActivity.java
+++ b/app/src/main/java/com/example/blockcanary/DemoActivity.java
@@ -4,6 +4,7 @@
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -13,23 +14,20 @@
 import java.io.FileInputStream;
 import java.io.IOException;
 
-public class DemoActivity extends Activity implements View.OnClickListener {
+public class DemoActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
+        setContentView(R.layout.activity_demo);
 
-        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
-        toolbar.setTitle("BlockCanary");
+//        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+//        toolbar.setTitle("BlockCanary");
 
-        Button button1 = (Button) findViewById(R.id.button1);
-        Button button2 = (Button) findViewById(R.id.button2);
-        Button button3 = (Button) findViewById(R.id.button3);
 
-        button1.setOnClickListener(this);
-        button2.setOnClickListener(this);
-        button3.setOnClickListener(this);
+            getSupportFragmentManager().beginTransaction()
+                    .add(R.id.container, DemoFragment.newInstance())
+                    .commit();
 
         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
         fab.setOnClickListener(new View.OnClickListener() {
@@ -44,7 +42,7 @@ private void showTipDlg() {
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
         builder.setTitle("Tip");
         builder.setMessage(getResources().getString(R.string.hello_world));
-        builder.setNegativeButton("cancel",null);
+        builder.setNegativeButton("ok",null);
         builder.show();
     }
 
@@ -70,52 +68,5 @@ public boolean onOptionsItemSelected(MenuItem item) {
         return super.onOptionsItemSelected(item);
     }
 
-    @Override
-    public void onClick(View v) {
-        switch (v.getId()) {
-            case R.id.button1:
-                try {
-                    Thread.sleep(2000);
-                } catch (InterruptedException e) {
-                    e.printStackTrace();
-                }
-                break;
-            case R.id.button2:
-                for (int i = 0; i < 100; ++i) {
-                    readFile();
-                }
-                break;
-            case R.id.button3:
-                double result = compute();
-                System.out.println(result);
-                break;
-        }
-    }
 
-    private double compute() {
-        double result = 0;
-        for (int i = 0; i < 1000000; ++i) {
-            result += Math.acos(Math.cos(i));
-            result -= Math.asin(Math.sin(i));
-        }
-        return result;
-    }
-
-    private void readFile() {
-        FileInputStream reader = null;
-        try {
-            reader = new FileInputStream("/proc/stat");
-            while (reader.read() != -1);
-        } catch (IOException e) {
-            e.printStackTrace();
-        } finally {
-            if (reader != null) {
-                try {
-                    reader.close();
-                } catch (IOException e) {
-                    e.printStackTrace();
-                }
-            }
-        }
-    }
 }
diff --git a/app/src/main/java/com/example/blockcanary/DemoFragment.java b/app/src/main/java/com/example/blockcanary/DemoFragment.java
new file mode 100644
index 0000000..a7ba99b
--- /dev/null
+++ b/app/src/main/java/com/example/blockcanary/DemoFragment.java
@@ -0,0 +1,105 @@
+package com.example.blockcanary;
+
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import java.io.FileInputStream;
+import java.io.IOException;
+
+
+public class DemoFragment extends Fragment implements View.OnClickListener{
+
+    public static DemoFragment newInstance()
+    {
+        DemoFragment f = new DemoFragment();
+        return  f;
+    }
+
+    @Override
+    public void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) {
+        View  v = inflater.inflate(R.layout.activity_main,null);
+        return  v;
+    }
+
+    @Override
+    public void onViewCreated(final View view, @Nullable final Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        Button button1 = (Button) view.findViewById(R.id.button1);
+        Button button2 = (Button) view.findViewById(R.id.button2);
+        Button button3 = (Button) view.findViewById(R.id.button3);
+
+        button1.setOnClickListener(this);
+        button2.setOnClickListener(this);
+        button3.setOnClickListener(this);
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+    }
+
+    @Override
+    public void onActivityCreated(@Nullable final Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+    }
+
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()) {
+            case R.id.button1:
+                try {
+                    Thread.sleep(2000);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+                break;
+            case R.id.button2:
+                for (int i = 0; i < 100; ++i) {
+                    readFile();
+                }
+                break;
+            case R.id.button3:
+                double result = compute();
+                System.out.println(result);
+                break;
+        }
+    }
+
+    private double compute() {
+        double result = 0;
+        for (int i = 0; i < 1000000; ++i) {
+            result += Math.acos(Math.cos(i));
+            result -= Math.asin(Math.sin(i));
+        }
+        return result;
+    }
+
+    private void readFile() {
+        FileInputStream reader = null;
+        try {
+            reader = new FileInputStream("/proc/stat");
+            while (reader.read() != -1);
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            if (reader != null) {
+                try {
+                    reader.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/com/example/blockcanary/SplashActivity.java b/app/src/main/java/com/example/blockcanary/SplashActivity.java
index d361ded..84c0565 100644
--- a/app/src/main/java/com/example/blockcanary/SplashActivity.java
+++ b/app/src/main/java/com/example/blockcanary/SplashActivity.java
@@ -8,7 +8,6 @@ public class SplashActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-        SplashActivity.this.setTheme(R.style.CjjBaseTheme_WhiteActivity);
         super.onCreate(savedInstanceState);
         startActivity(new Intent(this, DemoActivity.class));
         SplashActivity.this.finish();
diff --git a/app/src/main/res/drawable/background_splash.xml b/app/src/main/res/drawable/background_splash.xml
new file mode 100644
index 0000000..8ecd5eb
--- /dev/null
+++ b/app/src/main/res/drawable/background_splash.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:drawable="@android:color/white"/>
+
+    <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/ic_launcher"/>
+    </item>
+
+</layer-list>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_demo.xml b/app/src/main/res/layout/activity_demo.xml
new file mode 100644
index 0000000..066c36a
--- /dev/null
+++ b/app/src/main/res/layout/activity_demo.xml
@@ -0,0 +1,31 @@
+<?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"
+              android:layout_height="match_parent"
+              android:fitsSystemWindows="false"
+              android:orientation="vertical">
+
+    <View
+        android:id="@+id/view_state_bar"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/state_bar_height"
+        android:background="@color/material_blue" />
+
+    <FrameLayout
+        android:layout_below="@+id/view_state_bar"
+        android:id="@+id/container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:ignore="MergeRootFrame" />
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentRight="true"
+        android:layout_margin="16dp"
+        android:src="@drawable/ic_done"/>
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 00b7f01..5c5fdff 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,17 +1,25 @@
 <?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"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:orientation="vertical">
 
-    <android.support.v7.widget.Toolbar
-        android:id="@+id/toolbar"
+    <RelativeLayout
         android:layout_width="match_parent"
-        android:layout_height="?attr/actionBarSize"
-        android:background="?attr/colorPrimary"
-        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
-        />
+        android:layout_height="@dimen/top_bar_height"
+        android:background="@color/material_blue">
+
+
+        <TextView
+            android:id="@+id/tv_title"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerInParent="true"
+            android:text="@string/app_name"
+            android:textColor="@android:color/white"
+            android:textSize="18sp"/>
+
+    </RelativeLayout>
 
     <LinearLayout
         android:layout_width="match_parent"
diff --git a/app/src/main/res/values-v19/dimens.xml b/app/src/main/res/values-v19/dimens.xml
new file mode 100644
index 0000000..efa0e56
--- /dev/null
+++ b/app/src/main/res/values-v19/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="state_bar_height">25dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v19/styles.xml b/app/src/main/res/values-v19/styles.xml
new file mode 100644
index 0000000..f118a10
--- /dev/null
+++ b/app/src/main/res/values-v19/styles.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="CjjBaseTheme" parent="Base.Theme.DesignDemo">
+        <item name="android:windowTranslucentStatus">true</item>
+    </style>
+
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-v21/dimens.xml b/app/src/main/res/values-v21/dimens.xml
new file mode 100644
index 0000000..efa0e56
--- /dev/null
+++ b/app/src/main/res/values-v21/dimens.xml
@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="state_bar_height">25dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 47c8224..f43f05c 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -2,4 +2,10 @@
     <!-- Default screen margins, per the Android Design guidelines. -->
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
+
+    <dimen name="state_bar_height">0dp</dimen>
+    <dimen name="top_bar_height">48dp</dimen>
+    <dimen name="top_bar_btn_wh">48dp</dimen>
+    <dimen name="divider_height">0.5dp</dimen>
+
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index df6dbdd..330278a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,5 +1,5 @@
 <resources>
-    <string name="app_name">BlockCanary Demo</string>
+    <string name="app_name">BlockCanary</string>
 
     <string name="hello_world">点击按钮后，会触发主线程耗时时间，从而被BlockCanary，并记录卡慢日志，弹出notification，可以点击对应消息查看</string>
     <string name="thread_waiting">线程\n等待\n阻塞</string>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 270ee44..1b58828 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -3,7 +3,7 @@
     <style name="CjjBaseTheme" parent="Base.Theme.DesignDemo">
     </style>
 
-    <style name="Base.Theme.DesignDemo" parent="Theme.AppCompat.Light.DarkActionBar">
+    <style name="Base.Theme.DesignDemo" parent="Theme.AppCompat.Light.NoActionBar">
         <item name="colorPrimary">#2196F3</item>
         <item name="colorPrimaryDark">#1976D2</item>
         <item name="colorAccent">#F44336</item>
@@ -12,7 +12,7 @@
     </style>
 
     <style name="CjjBaseTheme.WhiteActivity">
-        <item name="android:windowBackground">@color/material_blue</item>
+        <item name="android:windowBackground">@drawable/background_splash</item>
         <item name="android:windowIsTranslucent">false</item>
     </style>