Quick Summary
"android.process.acore" is a general error indicating a problem with one of the core Android processes usually involving contacts, calendar, or related account synchronizations. This error typically manifests as an app crash, or a system-wide instability.
Common Causes
- Corrupted Contacts Data: Damaged or inconsistent data within your contacts database can lead to the acore process crashing when it attempts to access or modify it.
- Cache and Data Issues with Contacts/Calendar Apps: Accumulated cache or corrupted data within the Contacts, Contacts Storage, Calendar, or Calendar Storage apps can trigger the error.
- Account Synchronization Problems: Issues with the synchronization of your Google account or other accounts (e.g., Exchange) with the device can cause crashes related to the acore process.
- App Conflicts: In rare cases, third-party apps, particularly those that interact with contacts or calendars, may conflict with the system processes and lead to crashes.
- Insufficient Storage Space: Lack of available storage, prevents the Android system to successfully save temporary data. Therefore, the respective processes crash.
Step-by-Step Fixes
Method 1: Clear Cache and Data for Contacts/Calendar Apps
Step 1: Go to Settings.
Step 2: Tap on Apps or Application Manager (the name may vary depending on your Android version).
Step 3: Find and tap on Contacts. Then select Storage. Tap on Clear Cache and then Clear Data. Note: Clearing data will remove your contacts, so ensure they are synced with an online account. Sync them again if needed.
Step 4: Repeat the above steps for Contacts Storage, Calendar, and Calendar Storage apps.
Step 5: Restart your device.
Method 2: Re-sync Your Accounts
Step 1: Go to Settings.
Step 2: Tap on Accounts or Accounts and Sync.
Step 3: Select your Google account (or any other account you suspect is causing issues).
Step 4: Tap on Account sync. Disable and then re-enable the synchronization for Contacts and Calendar.
Step 5: Consider removing and re-adding the account if the problem persists.
Step 6: Restart your device.
Method 3: Check Storage Space
Step 1: Go to Settings.
Step 2: Tap on Storage.
Step 3: Review your available storage space. If it's critically low (less than 1GB), free up space by deleting unnecessary files, uninstalling unused apps, or moving data to cloud storage.
Step 4: Restart your device.
Method 4: Safe Mode Troubleshooting
Step 1: Enter Safe Mode. The process varies depending on your device, but typically involves long-pressing the power button, then long-pressing the power off option until a prompt to enter Safe Mode appears.
Step 2: Use your phone in Safe Mode for a while. If the error doesn't occur in Safe Mode, a third-party app is likely the culprit.
Step 3: Exit Safe Mode (usually by restarting your device).
Step 4: Uninstall recently installed or updated apps one by one and test after each removal to identify the conflicting app.
Method 5: Factory Reset (Last Resort)
Step 1: Back up all important data from your device, as a factory reset will erase everything.
Step 2: Go to Settings.
Step 3: Tap on General Management (or similar).
Step 4: Tap on Reset.
Step 5: Tap on Factory Data Reset.
Step 6: Follow the on-screen instructions to complete the reset.
Important: This will erase your data. Only proceed if other solutions have failed.