diff --git a/demo/Android.bp b/demo/Android.bp
new file mode 100644
index 0000000..77049de
--- /dev/null
+++ b/demo/Android.bp
@@ -0,0 +1,21 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_app {
+    name: "MicrodroidDemoApp",
+    srcs: ["java/**/*.java"],
+    resource_dirs: ["res"],
+    static_libs: [
+        "androidx-constraintlayout_constraintlayout",
+        "androidx.appcompat_appcompat",
+        "com.google.android.material_material",
+    ],
+    libs: [
+        "android.system.virtualmachine",
+    ],
+    jni_libs: ["MicrodroidTestNativeLib"],
+    platform_apis: true,
+    use_embedded_native_libs: true,
+    v4_signature: true,
+}
diff --git a/demo/AndroidManifest.xml b/demo/AndroidManifest.xml
new file mode 100644
index 0000000..ae4f734
--- /dev/null
+++ b/demo/AndroidManifest.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.microdroid.demo">
+
+    <application
+        android:label="MicrodroidDemo"
+        android:theme="@style/Theme.MicrodroidDemo">
+        <uses-library android:name="android.system.virtualmachine" android:required="true" />
+        <activity android:name=".MainActivity" android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
diff --git a/demo/assets/vm_config.json b/demo/assets/vm_config.json
new file mode 100644
index 0000000..b814394
--- /dev/null
+++ b/demo/assets/vm_config.json
@@ -0,0 +1,13 @@
+{
+  "os": {
+    "name": "microdroid"
+  },
+  "task": {
+    "type": "microdroid_launcher",
+    "command": "MicrodroidTestNativeLib.so",
+    "args": [
+      "hello",
+      "microdroid"
+    ]
+  }
+}
diff --git a/demo/java/com/android/microdroid/demo/MainActivity.java b/demo/java/com/android/microdroid/demo/MainActivity.java
new file mode 100644
index 0000000..976e37e
--- /dev/null
+++ b/demo/java/com/android/microdroid/demo/MainActivity.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.microdroid.demo;
+
+import android.app.Application;
+import android.os.Bundle;
+import android.system.virtualmachine.VirtualMachine;
+import android.system.virtualmachine.VirtualMachineConfig;
+import android.system.virtualmachine.VirtualMachineException;
+import android.system.virtualmachine.VirtualMachineManager;
+import android.widget.TextView;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+import androidx.lifecycle.Observer;
+import androidx.lifecycle.ViewModelProvider;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * This app is to demonstrate the use of APIs in the android.system.virtualmachine library.
+ * Currently, this app starts a virtual machine running Microdroid and shows the console output from
+ * the virtual machine to the UI.
+ */
+public class MainActivity extends AppCompatActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        // Whenthe console model is updated, append the new line to the text view.
+        TextView view = (TextView) findViewById(R.id.textview);
+        VirtualMachineModel model = new ViewModelProvider(this).get(VirtualMachineModel.class);
+        model.getConsoleOutput()
+                .observeForever(
+                        new Observer<String>() {
+                            @Override
+                            public void onChanged(String line) {
+                                view.append(line + "\n");
+                            }
+                        });
+    }
+
+    /** Models a virtual machine and console output from it. */
+    public static class VirtualMachineModel extends AndroidViewModel {
+        private final VirtualMachine mVirtualMachine;
+        private final MutableLiveData<String> mConsoleOutput = new MutableLiveData<>();
+
+        public VirtualMachineModel(Application app) {
+            super(app);
+
+            // Create a VM and run it.
+            // TODO(jiyong): remove the call to idsigPath
+            try {
+                VirtualMachineConfig config =
+                        new VirtualMachineConfig.Builder(getApplication(), "assets/vm_config.json")
+                                .idsigPath("/data/local/tmp/virt/MicrodroidDemoApp.apk.idsig")
+                                .build();
+                VirtualMachineManager vmm = VirtualMachineManager.getInstance(getApplication());
+                mVirtualMachine = vmm.create("demo_vm", config);
+                mVirtualMachine.run();
+            } catch (VirtualMachineException e) {
+                throw new RuntimeException(e);
+            }
+
+            // Read console output from the VM in the background
+            ExecutorService executorService = Executors.newFixedThreadPool(1);
+            executorService.execute(
+                    new Runnable() {
+                        @Override
+                        public void run() {
+                            try {
+                                BufferedReader reader =
+                                        new BufferedReader(
+                                                new InputStreamReader(
+                                                        mVirtualMachine.getConsoleOutputStream()));
+                                while (true) {
+                                    String line = reader.readLine();
+                                    mConsoleOutput.postValue(line);
+                                }
+                            } catch (IOException | VirtualMachineException e) {
+                                // Consume
+                            }
+                        }
+                    });
+        }
+
+        public LiveData<String> getConsoleOutput() {
+            return mConsoleOutput;
+        }
+    }
+}
diff --git a/demo/res/layout/activity_main.xml b/demo/res/layout/activity_main.xml
new file mode 100644
index 0000000..026382f
--- /dev/null
+++ b/demo/res/layout/activity_main.xml
@@ -0,0 +1,26 @@
+<?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"
+    android:background="#FFC107"
+    android:scrollbars="horizontal|vertical"
+    android:textAlignment="textStart"
+    tools:context=".MainActivity">
+
+    <ScrollView
+        android:id="@+id/scrollview"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <TextView
+            android:id="@+id/textview"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="#FFEB3B"
+            android:fontFamily="monospace"
+            android:textColor="#000000" />
+    </ScrollView>
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/demo/res/values/colors.xml b/demo/res/values/colors.xml
new file mode 100644
index 0000000..f8c6127
--- /dev/null
+++ b/demo/res/values/colors.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
\ No newline at end of file
diff --git a/demo/res/values/themes.xml b/demo/res/values/themes.xml
new file mode 100644
index 0000000..16b8ab3
--- /dev/null
+++ b/demo/res/values/themes.xml
@@ -0,0 +1,16 @@
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <!-- Base application theme. -->
+    <style name="Theme.MicrodroidDemo" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
+        <!-- Primary brand color. -->
+        <item name="colorPrimary">@color/purple_500</item>
+        <item name="colorPrimaryVariant">@color/purple_700</item>
+        <item name="colorOnPrimary">@color/white</item>
+        <!-- Secondary brand color. -->
+        <item name="colorSecondary">@color/teal_200</item>
+        <item name="colorSecondaryVariant">@color/teal_700</item>
+        <item name="colorOnSecondary">@color/black</item>
+        <!-- Status bar color. -->
+        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
+        <!-- Customize your theme here. -->
+    </style>
+</resources>