diff --git a/android_client/app/src/main/AndroidManifest.xml b/android_client/app/src/main/AndroidManifest.xml
index 89f74e6e3..dae81fc7d 100644
--- a/android_client/app/src/main/AndroidManifest.xml
+++ b/android_client/app/src/main/AndroidManifest.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:tools="http://schemas.android.com/tools"
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
@@ -69,6 +68,7 @@
 
         <service
             android:name=".ScreenRecorderService"
+            android:foregroundServiceType="mediaProjection"
             android:exported="true" />
         <service
             android:name=".KeepAliveService"
diff --git a/android_client/app/src/main/java/com/microsoft/hydralab/android/client/MainActivity.java b/android_client/app/src/main/java/com/microsoft/hydralab/android/client/MainActivity.java
index e9982a593..b892e2ce5 100644
--- a/android_client/app/src/main/java/com/microsoft/hydralab/android/client/MainActivity.java
+++ b/android_client/app/src/main/java/com/microsoft/hydralab/android/client/MainActivity.java
@@ -2,6 +2,12 @@
 // Licensed under the MIT License.
 package com.microsoft.hydralab.android.client;
 
+import static android.Manifest.permission.RECORD_AUDIO;
+import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
+import static android.os.Build.VERSION_CODES.M;
+import static com.microsoft.hydralab.android.client.ScreenRecorderService.AUDIO_AAC;
+import static com.microsoft.hydralab.android.client.ScreenRecorderService.VIDEO_AVC;
+
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
@@ -47,12 +53,6 @@
 import java.util.List;
 import java.util.Locale;
 
-import static android.Manifest.permission.RECORD_AUDIO;
-import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
-import static android.os.Build.VERSION_CODES.M;
-import static com.microsoft.hydralab.android.client.ScreenRecorderService.AUDIO_AAC;
-import static com.microsoft.hydralab.android.client.ScreenRecorderService.VIDEO_AVC;
-
 public class MainActivity extends Activity {
     private static final String TAG = "ScreenRecorder";
     private static final String DEFAULT_ACV_PROFILE = "Default";
@@ -283,7 +283,12 @@ private void startCapturing(int resultCode, Intent data) {
         intent.putExtra("dstPath", file.getAbsolutePath());
         intent.putExtra("resultCode", resultCode);
         intent.putExtra("data", data);
-        startService(intent);
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            startForegroundService(intent);
+        } else {
+            startService(intent);
+        }
 
         handler.postDelayed(updateButtonState, 1000);
         //moveTaskToBack(true);
diff --git a/android_client/app/src/main/java/com/microsoft/hydralab/android/client/ScreenRecorderService.java b/android_client/app/src/main/java/com/microsoft/hydralab/android/client/ScreenRecorderService.java
index 94dcc473b..b910ba1a3 100644
--- a/android_client/app/src/main/java/com/microsoft/hydralab/android/client/ScreenRecorderService.java
+++ b/android_client/app/src/main/java/com/microsoft/hydralab/android/client/ScreenRecorderService.java
@@ -6,6 +6,7 @@
 import static android.media.MediaFormat.MIMETYPE_VIDEO_AVC;
 
 import android.app.Activity;
+import android.app.Notification;
 import android.app.Service;
 import android.content.ComponentName;
 import android.content.Context;
@@ -182,6 +183,8 @@ public int onStartCommand(Intent intent, int flags, int startId) {
                 dstPath = new File(getSavingDir(), fileName).getAbsolutePath();
             }
 
+            startForeground(Notifications.id, mNotifications.createRecordingNotification());
+
             if (mMediaProjection == null) {
                 Intent data = intent.getParcelableExtra("data");
                 int resultCode = intent.getIntExtra("resultCode", 0);
@@ -205,8 +208,6 @@ public int onStartCommand(Intent intent, int flags, int startId) {
             mAudioEncoder = audio == null ? null : new MicRecorder(audio);
 
             start();
-
-            startForeground(Notifications.id, mNotifications.createRecordingNotification());
         }
         return START_STICKY;
     }
diff --git a/common/src/main/java/com/microsoft/hydralab/common/entity/common/TestTaskSpec.java b/common/src/main/java/com/microsoft/hydralab/common/entity/common/TestTaskSpec.java
index 566427b3d..469e0dcfb 100644
--- a/common/src/main/java/com/microsoft/hydralab/common/entity/common/TestTaskSpec.java
+++ b/common/src/main/java/com/microsoft/hydralab/common/entity/common/TestTaskSpec.java
@@ -63,6 +63,9 @@ public void updateWithDefaultValues() {
         if (StringUtils.isBlank(testSuiteClass)) {
             testSuiteClass = pkgName;
         }
+        if (enableNetworkMonitor && StringUtils.isBlank(networkMonitorRule)) {
+            networkMonitorRule = pkgName;
+        }
     }
 
     private void determineScopeOfTestCase() {
diff --git a/common/src/main/java/com/microsoft/hydralab/common/management/listener/impl/PreInstallListener.java b/common/src/main/java/com/microsoft/hydralab/common/management/listener/impl/PreInstallListener.java
index e09d25a5a..28d41036f 100644
--- a/common/src/main/java/com/microsoft/hydralab/common/management/listener/impl/PreInstallListener.java
+++ b/common/src/main/java/com/microsoft/hydralab/common/management/listener/impl/PreInstallListener.java
@@ -50,7 +50,6 @@ public void onDeviceConnected(DeviceInfo deviceInfo) {
             try {
                 FlowUtil.retryAndSleepWhenFalse(3, 10, () -> deviceDriverManager.installApp(deviceInfo, appFile.getAbsolutePath(), classLogger));
                 classLogger.info("Pre-Install {} successfully", appFile.getAbsolutePath());
-                break;
             } catch (Exception e) {
                 String errorMessage = String.format("Pre-Install %s failed", appFile.getAbsolutePath());
                 classLogger.error(errorMessage, e);
diff --git a/common/src/main/java/com/microsoft/hydralab/common/network/AndroidNetworkMonitor.java b/common/src/main/java/com/microsoft/hydralab/common/network/AndroidNetworkMonitor.java
index fa5c48f94..e7d674fae 100644
--- a/common/src/main/java/com/microsoft/hydralab/common/network/AndroidNetworkMonitor.java
+++ b/common/src/main/java/com/microsoft/hydralab/common/network/AndroidNetworkMonitor.java
@@ -48,10 +48,14 @@ public void start() {
         logger.info("Start VPN service");
 
         // launch vpn
-        String command_launch = "adb shell am start";
+        String command_launch = "am start";
         command_launch += " -a com.microsoft.hydralab.android.client.vpn.START";
         command_launch += " -n com.microsoft.hydralab.android.client/.VpnActivity";
-        ShellUtils.execLocalCommandWithResult(command_launch, logger);
+        try {
+            adbOperateUtil.execOnDevice(deviceInfo, command_launch, new MultiLineNoCancelLoggingReceiver(logger), logger);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+        }
         while (true) {
             ThreadUtils.safeSleep(1000);
             boolean clicked = grantPermissionClick();
@@ -61,12 +65,16 @@ public void start() {
         }
 
         // start vpn
-        String command_start = "adb shell am start";
+        String command_start = "am start";
         command_start += " -a com.microsoft.hydralab.android.client.vpn.START";
         command_start += " -n com.microsoft.hydralab.android.client/.VpnActivity";
         command_start += String.format(" --es \"apps\" \"%s\"", rule);
         command_start += " --es \"output\" \"" + AndroidDumpPath + "\"";
-        ShellUtils.execLocalCommandWithResult(command_start, logger);
+        try {
+            adbOperateUtil.execOnDevice(deviceInfo, command_start, new MultiLineNoCancelLoggingReceiver(logger), logger);
+        } catch (Exception e) {
+            logger.error(e.getMessage(), e);
+        }
         while (true) {
             ThreadUtils.safeSleep(1000);
             boolean clicked = grantPermissionClick();
@@ -82,10 +90,14 @@ public void stop() {
 
         try {
             // stop vpn
-            String command_stop = "adb shell am start";
+            String command_stop = "am start";
             command_stop += " -a com.microsoft.hydralab.android.client.vpn.STOP";
             command_stop += " -n com.microsoft.hydralab.android.client/.VpnActivity";
-            ShellUtils.execLocalCommandWithResult(command_stop, logger);
+            try {
+                adbOperateUtil.execOnDevice(deviceInfo, command_stop, new MultiLineNoCancelLoggingReceiver(logger), logger);
+            } catch (Exception e) {
+                logger.error(e.getMessage(), e);
+            }
             ThreadUtils.safeSleep(2000);
 
             // pull result
@@ -113,7 +125,7 @@ public void stop() {
     }
 
     private boolean grantPermissionClick() {
-        String[] possibleTexts = { "Start now", "Allow", "允许" };
+        String[] possibleTexts = { "Start now", "Allow", "OK", "允许" };
         String dump = dumpView(deviceInfo, logger);
         // classLogger.info("Dump on {}: {}", adbDeviceInfo.getSerialNum(), dump);
         if (StringUtils.isBlank(dump)) {