diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/ErrorActivity.java b/android/TerminalApp/java/com/android/virtualization/terminal/ErrorActivity.java
index ee1f1ad..44dcce5 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/ErrorActivity.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/ErrorActivity.java
@@ -16,6 +16,7 @@
 
 package com.android.virtualization.terminal;
 
+import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
@@ -25,7 +26,14 @@
 import androidx.annotation.Nullable;
 
 public class ErrorActivity extends BaseActivity {
-    public static final String EXTRA_CAUSE = "cause";
+    private static final String EXTRA_CAUSE = "cause";
+
+    public static void start(Context context, Exception e) {
+        Intent intent = new Intent(context, ErrorActivity.class);
+        intent.putExtra(EXTRA_CAUSE, e);
+        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
+        context.startActivity(intent);
+    }
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
index a3b0577..ded186f 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
@@ -197,7 +197,7 @@
     public boolean dispatchKeyEvent(KeyEvent event) {
         if (Build.isDebuggable() && event.getKeyCode() == KeyEvent.KEYCODE_UNKNOWN) {
             if (event.getAction() == KeyEvent.ACTION_UP) {
-                launchErrorActivity(new Exception("Debug: KeyEvent.KEYCODE_UNKNOWN"));
+                ErrorActivity.start(this, new Exception("Debug: KeyEvent.KEYCODE_UNKNOWN"));
             }
             return true;
         }
@@ -444,7 +444,8 @@
     @Override
     public void onVmError() {
         Log.i(TAG, "onVmError()");
-        launchErrorActivity(new Exception("onVmError"));
+        // TODO: error cause is too simple.
+        ErrorActivity.start(this, new Exception("onVmError"));
     }
 
     @Override
@@ -501,13 +502,6 @@
         }
     }
 
-    private void launchErrorActivity(Exception e) {
-        Intent intent = new Intent(this, ErrorActivity.class);
-        intent.putExtra(ErrorActivity.EXTRA_CAUSE, e);
-        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
-        this.startActivity(intent);
-    }
-
     private boolean installIfNecessary() {
         // If payload from external storage exists(only for debuggable build) or there is no
         // installed image, launch installer activity.