使用am start -n启动com.isi.testapp.Welcome报错，求解决方法

Hey there! Let's break down why you're hitting that "Bad component name" error and how to fix it quickly.

The Root Cause #

The am start -n command requires a specific format for the component name: <app-package-name>/<fully-qualified-activity-class-name>. You only provided the activity class name (com.isi.testapp.Welcome) without pairing it with the app's package name separated by a slash—this is why the system can't locate the Activity.

The Correct Command #

Since your app's package name is likely com.isi.testapp (matching the Activity's package path), the working command should be:

am start -n com.isi.testapp/com.isi.testapp.Welcome

Extra Troubleshooting Tips #

If you still run into issues, try these steps to verify details:

• Confirm the app is installed and the package name is correct with:

  pm list packages | grep isi
  

• List all exported Activities for the app to double-check the full component name:

  dumpsys package com.isi.testapp | grep -A 5 "Activity"
  

• Ensure you're in a valid adb shell session (you should see a device-specific prompt like device:/ $).

内容的提问来源于stack exchange，提问作者Utkarsh Agrawal