Software⏱️ 2 min read📅 2026-05-31

How to Fix: Android: Unable to add window. Permission denied for this window type

Permission denied error when trying to add window on Android Lock Screen.

Quick Answer: Check if your app has the correct permission to display windows on the lock screen. Ensure that you are requesting the correct permission in your app's manifest file, specifically ``.

📋 Table of Contents

  1. 🚀 How to Resolve This Issue
  2. 💡 Conclusion

The error occurs because the `WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG` type is not compatible with your app's context. This type of window requires a specific permission to be granted, which is not always available when running in the background.

🚀 How to Resolve This Issue

Method 1: Request Permission at Runtime

  1. Step 1: Import the `Manifest.permission.WAKE_LOCK` permission in your AndroidManifest.xml file.

Method 2: Use a Service to Run Your Window

  1. Step 1: Create a service that runs in the background and handles your window logic.

Method 3: Use a WorkManager to Schedule Your Window

  1. Step 1: Create a `WorkRequest` that schedules your window to appear at the desired time.

💡 Conclusion

By implementing one of these methods, you can resolve the `Unable to add window. Permission denied for this window type` error and successfully display your window on the Lock Screen.

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