diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/CertificateUtils.java b/android/TerminalApp/java/com/android/virtualization/terminal/CertificateUtils.java
index 01d2afa..fa5c382 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/CertificateUtils.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/CertificateUtils.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.content.Context;
 import android.security.keystore.KeyGenParameterSpec;
 import android.security.keystore.KeyProperties;
@@ -37,8 +39,6 @@
 import java.security.cert.X509Certificate;
 
 public class CertificateUtils {
-    private static final String TAG = "CertificateUtils";
-
     private static final String ALIAS = "ttyd";
 
     public static KeyStore.PrivateKeyEntry createOrGetKey() {
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/DebianServiceImpl.java b/android/TerminalApp/java/com/android/virtualization/terminal/DebianServiceImpl.java
index 1b2ce8c..93b0b0c 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/DebianServiceImpl.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/DebianServiceImpl.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.util.Log;
@@ -37,7 +39,11 @@
 import java.util.Set;
 
 final class DebianServiceImpl extends DebianServiceGrpc.DebianServiceImplBase {
-    public static final String TAG = "DebianService";
+    private static final String PREFERENCE_FILE_KEY =
+            "com.android.virtualization.terminal.PREFERENCE_FILE_KEY";
+    private static final String PREFERENCE_FORWARDING_PORTS = "PREFERENCE_FORWARDING_PORTS";
+    private static final String PREFERENCE_FORWARDING_PORT_IS_ENABLED_PREFIX =
+            "PREFERENCE_FORWARDING_PORT_IS_ENABLED_";
 
     private final Context mContext;
     private final SharedPreferences mSharedPref;
@@ -66,7 +72,7 @@
     public void reportVmActivePorts(
             ReportVmActivePortsRequest request,
             StreamObserver<ReportVmActivePortsResponse> responseObserver) {
-        Log.d(DebianServiceImpl.TAG, "reportVmActivePorts: " + request.toString());
+        Log.d(TAG, "reportVmActivePorts: " + request.toString());
 
         Set<String> prevPorts =
                 mSharedPref.getStringSet(mPreferenceForwardingPorts, Collections.emptySet());
@@ -93,7 +99,7 @@
     @Override
     public void reportVmIpAddr(
             IpAddr request, StreamObserver<ReportVmIpAddrResponse> responseObserver) {
-        Log.d(DebianServiceImpl.TAG, "reportVmIpAddr: " + request.toString());
+        Log.d(TAG, "reportVmIpAddr: " + request.toString());
         mCallback.onIpAddressAvailable(request.getAddr());
         ReportVmIpAddrResponse reply = ReportVmIpAddrResponse.newBuilder().setSuccess(true).build();
         responseObserver.onNext(reply);
@@ -103,7 +109,7 @@
     @Override
     public void openForwardingRequestQueue(
             QueueOpeningRequest request, StreamObserver<ForwardingRequestItem> responseObserver) {
-        Log.d(DebianServiceImpl.TAG, "OpenForwardingRequestQueue");
+        Log.d(TAG, "OpenForwardingRequestQueue");
         mPortForwardingListener =
                 new SharedPreferences.OnSharedPreferenceChangeListener() {
                     @Override
@@ -144,7 +150,7 @@
     private static native void terminateForwarderHost();
 
     void killForwarderHost() {
-        Log.d(DebianServiceImpl.TAG, "Stopping port forwarding");
+        Log.d(TAG, "Stopping port forwarding");
         if (mPortForwardingListener != null) {
             mSharedPref.unregisterOnSharedPreferenceChangeListener(mPortForwardingListener);
             terminateForwarderHost();
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/InstallUtils.java b/android/TerminalApp/java/com/android/virtualization/terminal/InstallUtils.java
index b17e636..71f2a2d 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/InstallUtils.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/InstallUtils.java
@@ -15,6 +15,8 @@
  */
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.content.Context;
 import android.os.Environment;
 import android.os.FileUtils;
@@ -38,8 +40,6 @@
 import java.util.function.Function;
 
 public class InstallUtils {
-    private static final String TAG = InstallUtils.class.getSimpleName();
-
     private static final String VM_CONFIG_FILENAME = "vm_config.json";
     private static final String COMPRESSED_PAYLOAD_FILENAME = "images.tar.gz";
     private static final String ROOTFS_FILENAME = "root_part";
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/InstallerActivity.java b/android/TerminalApp/java/com/android/virtualization/terminal/InstallerActivity.java
index 45da73c..52ef3d4 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/InstallerActivity.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/InstallerActivity.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.annotation.MainThread;
 import android.content.ComponentName;
 import android.content.Context;
@@ -42,8 +44,6 @@
 import java.lang.ref.WeakReference;
 
 public class InstallerActivity extends BaseActivity {
-    private static final String TAG = "LinuxInstaller";
-
     private static final long ESTIMATED_IMG_SIZE_BYTES = FileUtils.parseSize("550MB");
 
     private CheckBox mWaitForWifiCheckbox;
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/InstallerService.java b/android/TerminalApp/java/com/android/virtualization/terminal/InstallerService.java
index 5d4c4ad..6fd3b5c 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/InstallerService.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/InstallerService.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.app.Notification;
 import android.app.PendingIntent;
 import android.app.Service;
@@ -55,8 +57,6 @@
 import java.util.concurrent.Executors;
 
 public class InstallerService extends Service {
-    private static final String TAG = "InstallerService";
-
     private static final int NOTIFICATION_ID = 1313; // any unique number among notifications
 
     private static final String IMAGE_URL =
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/Runner.java b/android/TerminalApp/java/com/android/virtualization/terminal/Runner.java
index a2247b1..4094025 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/Runner.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/Runner.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.content.Context;
 import android.system.virtualmachine.VirtualMachine;
 import android.system.virtualmachine.VirtualMachineCallback;
@@ -30,7 +32,6 @@
 
 /** Utility class for creating a VM and waiting for it to finish. */
 class Runner {
-    private static final String TAG = Runner.class.getSimpleName();
     private final VirtualMachine mVirtualMachine;
     private final Callback mCallback;
 
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/SettingsPortForwardingActivity.kt b/android/TerminalApp/java/com/android/virtualization/terminal/SettingsPortForwardingActivity.kt
index 32df273..1b39ff0 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/SettingsPortForwardingActivity.kt
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/SettingsPortForwardingActivity.kt
@@ -28,9 +28,9 @@
 import androidx.core.app.ActivityCompat
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import com.android.virtualization.terminal.MainActivity.TAG
 
 class SettingsPortForwardingActivity : AppCompatActivity() {
-    val TAG: String = "VmTerminalApp"
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.settings_port_forwarding)
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/SettingsRecoveryActivity.kt b/android/TerminalApp/java/com/android/virtualization/terminal/SettingsRecoveryActivity.kt
index ef76e03..e291b57 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/SettingsRecoveryActivity.kt
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/SettingsRecoveryActivity.kt
@@ -22,6 +22,7 @@
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.isVisible
 import androidx.lifecycle.lifecycleScope
+import com.android.virtualization.terminal.MainActivity.TAG
 import com.google.android.material.card.MaterialCardView
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
@@ -30,8 +31,6 @@
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
-const val TAG: String = "VmTerminalApp"
-
 class SettingsRecoveryActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -123,4 +122,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherService.java b/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherService.java
index 06ecab1..32d534a 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherService.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherService.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -60,7 +62,6 @@
 
 public class VmLauncherService extends Service implements DebianServiceImpl.DebianServiceCallback {
     public static final String EXTRA_NOTIFICATION = "EXTRA_NOTIFICATION";
-    static final String TAG = "VmLauncherService";
 
     private static final int RESULT_START = 0;
     private static final int RESULT_STOP = 1;
@@ -336,7 +337,7 @@
                     enabled);
             editor.apply();
 
-            context.getSystemService(NotificationManager.class).cancel(VmLauncherService.TAG, port);
+            context.getSystemService(NotificationManager.class).cancel(TAG, port);
         }
     }
 }
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherServices.java b/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherServices.java
index d6c6786..aad95cb 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherServices.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/VmLauncherServices.java
@@ -16,6 +16,8 @@
 
 package com.android.virtualization.terminal;
 
+import static com.android.virtualization.terminal.MainActivity.TAG;
+
 import android.app.Notification;
 import android.content.Context;
 import android.content.Intent;
@@ -31,8 +33,6 @@
 import java.util.List;
 
 public class VmLauncherServices {
-    private static final String TAG = "VmLauncherServices";
-
     private static final String ACTION_START_VM_LAUNCHER_SERVICE =
             "android.virtualization.START_VM_LAUNCHER_SERVICE";