Quick Summary
The "com.android.systemui" error indicates a problem with the System User Interface (System UI) application on your Android device. This application is responsible for elements like the status bar, navigation bar, and notification shade, so when it crashes, you may experience issues with these features.
Common Causes
- Corrupted System UI Data/Cache: Over time, the System UI app can accumulate corrupted data or cached files. This can lead to instability and crashes.
- Incompatible App or Theme: A recently installed or updated app, especially a theme or customization app, might be conflicting with the System UI. These apps can sometimes cause issues by altering the System UI's functionality.
- Insufficient Resources/Memory: If your device is running low on available RAM or storage space, the System UI might not have enough resources to function properly, leading to crashes.
- System Software Issue: An underlying issue with your Android operating system, potentially due to a bug or incomplete update, can also trigger System UI crashes.
- Outdated System UI or Android Version: Using an outdated version (build) of Android, or System UI specifically for that build, can cause errors due to compatibility problems.
Step-by-Step Fixes
Method 1: Clear System UI Cache and Data
Note: The exact steps might vary slightly depending on your Android version and device manufacturer, but the general process remains the same.
Step 1: Open your device's Settings app.
Step 2: Navigate to Apps or Applications (or Apps & Notifications).
Step 3: Find the System UI app. You might need to tap on the three dots in the top right corner and select 'Show System Apps' to see it.
Step 4: Tap on Storage.
Step 5: Tap on Clear Cache. Then, tap on Clear Data (or Clear Storage). You may need to confirm this action.
Step 6: Restart your device.
Method 2: Restart Your Device in Safe Mode
Note: Starting in Safe Mode disables all third-party applications, allowing you to determine if a recently installed app is causing the issue.
Step 1: Press and hold the power button until the power menu appears.
Step 2: Long-press (or tap and hold) the Power off option until you see the Reboot to safe mode prompt.
Step 3: Tap OK to restart your device in Safe Mode.
Step 4: Observe if the System UI crash persists in Safe Mode. If it doesn't, a third-party app is likely the culprit. Uninstall recently installed or updated apps one by one until the issue is resolved.
Step 5: To exit Safe Mode, simply restart your device normally.
Method 3: Uninstall Recently Installed Apps
Step 1: Go to Settings > Apps (or Applications, or Apps & Notifications).
Step 2: Sort the apps by installation date (newest first) to quickly identify recently installed applications.
Step 3: Uninstall applications that you suspect might be causing the issue, one at a time.
Step 4: After uninstalling each app, restart your device and check if the problem is resolved.
Method 4: Check for System Updates
Step 1: Open your device's Settings app.
Step 2: Scroll down and tap on System (or About phone, depending on your device).
Step 3: Look for System update (or Software update).
Step 4: Tap on Check for update and follow any on-screen instructions to download and install available updates.
Method 5: Factory Reset (Last Resort)
Warning: This will erase all data on your device. Back up important data before proceeding.
Step 1: Open your device's Settings app.
Step 2: Navigate to System > Reset options (or General management > Reset).
Step 3: Select Erase all data (factory reset).
Step 4: Confirm the reset and follow the on-screen instructions.