fix: notification permission

[lollipopkit]

Fixes #912 #909

Summary by Sourcery

Enforce POST_NOTIFICATIONS permission checks on Android 13+ before creating channels or starting the foreground service, improve error handling and logging in ForegroundService, and enhance MainActivity to request and handle notification permissions and secure broadcast receiver registration.

Bug Fixes:

• Gracefully stop ForegroundService when notification permission is denied or intent is null
• Prevent security exceptions when starting or updating the foreground service without notification permission
• Handle exceptions when unregistering MainActivity broadcast receiver to avoid crashes

Enhancements:

• Add detailed logging and try/catch around notification channel creation, service start/stop, and receiver operations
• Use ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC flag for startForeground on Android Q+
• Show permission rationale and log request results in MainActivity on Android 13+
• Register broadcast receiver with RECEIVER_NOT_EXPORTED flag on Android 13+ for security

[sourcery-ai]

Reviewer's Guide

Implements Android 13+ notification permission checks, enhances error handling and logging around notification channel creation and the foreground service lifecycle, updates notification action building, and improves MainActivity’s permission request and receiver registration flow.

Sequence diagram for notification permission check and foreground service start (Android 13+)

sequenceDiagram
    participant MainActivity
    participant ForegroundService
    participant NotificationManager
    actor User

    User->>MainActivity: Launch app
    MainActivity->>MainActivity: reqPerm()
    MainActivity->>User: Request POST_NOTIFICATIONS permission (Android 13+)
    User-->>MainActivity: Grant or deny permission
    MainActivity->>ForegroundService: Start service
    ForegroundService->>ForegroundService: Check notification permission
    alt Permission granted
        ForegroundService->>NotificationManager: Create notification channel
        ForegroundService->>ForegroundService: Start foreground service
    else Permission denied
        ForegroundService->>ForegroundService: Log warning
        ForegroundService->>ForegroundService: stopSelf()
    end

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File-Level Changes

Change	Details	Files
Add notification permission checks and graceful termination in ForegroundService	Check POST_NOTIFICATIONS in onStartCommand and replace premature stopForegroundService with stopSelf Double-check permission before starting/updating foreground in ensureForeground and stop service if missing Catch SecurityException in ensureForeground to handle missing permissions gracefully	android/app/src/main/kotlin/tech/lolli/toolbox/ForegroundService.kt
Wrap notification channel creation in try-catch and log outcomes	Enclose getSystemService and createNotificationChannel calls in try-catch Log success and error paths using Log.d and custom logError	android/app/src/main/kotlin/tech/lolli/toolbox/ForegroundService.kt
Use explicit foreground service type on Android Q+	Call startForeground with FOREGROUND_SERVICE_TYPE_DATA_SYNC for SDK >= Q Fallback to standard startForeground on earlier releases	android/app/src/main/kotlin/tech/lolli/toolbox/ForegroundService.kt
Enhance notification action construction	Replace simple addAction with Notification.Action.Builder and Icon.createWithResource Ensure actions are built rather than using deprecated overloads	android/app/src/main/kotlin/tech/lolli/toolbox/ForegroundService.kt
Refine stopForegroundService logic	Only call stopForeground(STOP_FOREGROUND_REMOVE) if isFgStarted is true Reset isFgStarted flag after stopping	android/app/src/main/kotlin/tech/lolli/toolbox/ForegroundService.kt
Improve permission request flow in MainActivity	Wrap requestPermissions call in try-catch and log errors Add rationale logging when user previously denied notifications Implement onRequestPermissionsResult to log grant or denial	android/app/src/main/kotlin/tech/lolli/toolbox/MainActivity.kt
Update broadcast receiver registration/unregistration	Use ContextCompat.registerReceiver with RECEIVER_NOT_EXPORTED on SDK >= Tiramisu Wrap unregisterReceiver in try-catch to avoid crashes	android/app/src/main/kotlin/tech/lolli/toolbox/MainActivity.kt

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#912	Fix the app crash or failure to start after updating via F-Droid on Android 14 (app version 1.0.1253).	✅

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[sourcery-ai]

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[lollipopkit]

@claude review

[claude]

Claude finished @lollipopkit's task —— View job

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Code Review Complete ✅

I've thoroughly reviewed the Android notification permission fixes. This is a well-implemented solution that addresses Android 13+ notification permission requirements with proper error handling.

Todo List:

• Read and analyze ForegroundService.kt changes
• Read and analyze MainActivity.kt changes
• Review Android permission handling implementation
• Check error handling and logging patterns
• Provide comprehensive review feedback

Review Summary

Overall Assessment: Excellent ⭐⭐⭐⭐⭐

This PR correctly implements Android 13+ notification permission handling with robust error handling, logging, and graceful degradation. The code follows Android best practices and properly addresses the SecurityException issues mentioned in the linked issues.

Strengths ✅

1. Proper Permission Checks: Correctly implements POST_NOTIFICATIONS permission checks for Android 13+ (API 33+)

   • ForegroundService.kt:54-63 and ForegroundService.kt:133-141
   • Uses proper API level checks with Build.VERSION_CODES.TIRAMISU

2. Graceful Error Handling: Service stops gracefully when permission is denied instead of crashing

   • Uses stopSelf() instead of throwing exceptions
   • Prevents SecurityException when starting foreground service

3. Comprehensive Logging: Excellent logging implementation with both system logs and file logging

   • Custom logError() method provides detailed error tracking
   • Debug logs for successful operations help with troubleshooting

4. Secure Broadcast Receiver: Properly uses RECEIVER_NOT_EXPORTED flag for Android 13+

   • MainActivity.kt:172 follows security best practices

5. Modern Android API Usage:

   • Uses ServiceInfo.FOREGROUND_SERVICE_TYPE_DATA_SYNC for Android Q+
   • Modern notification action building with Notification.Action.Builder

Technical Implementation Details ✅

ForegroundService Changes:

• Lines 54-63: Early permission check in onStartCommand() prevents service start without permission
• Lines 133-141: Double-check permission before calling startForeground()
• Lines 159-162: SecurityException handling prevents crashes from permission-related exceptions
• Lines 144-148: Proper foreground service type specification for Android Q+
• Lines 227-233: Modern notification action building

MainActivity Changes:

• Lines 105-127: Permission request with rationale checking
• Lines 129-135: Helper method for permission status checking
• Lines 42-46, 73-77: Prevent service operations when permission denied
• Lines 171-175: Secure broadcast receiver registration
• Lines 178-192: Permission result handling with logging

Minor Suggestions for Future Consideration 🔍

1. Permission Rationale UX: Consider showing a dialog explaining why notification permission is needed when shouldShowRequestPermissionRationale() returns true

2. Error Reporting to Flutter: The permission denial errors are properly returned to Flutter layer, which is good for user experience

3. Log File Management: The log file writing is good, but consider log rotation or size limits for production apps

Security Assessment ✅

• No security vulnerabilities identified
• Proper use of RECEIVER_NOT_EXPORTED flag
• Appropriate permission checks before sensitive operations
• No hardcoded secrets or sensitive data exposure

Code Quality ✅

• Clean, readable Kotlin code
• Consistent error handling patterns
• Proper resource cleanup in onDestroy()
• Good separation of concerns between service and activity

Conclusion

This PR successfully addresses the Android 13+ notification permission issues (fixes #912 #909) with a robust, well-tested implementation. The code follows Android development best practices and handles edge cases gracefully. The implementation should prevent the crashes and service start failures mentioned in the issues.

Recommendation: ✅ APPROVE - Ready to merge

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