Programming Tutorials

  You have likely encountered this error immediately after upgrading your Flutter project's dependencies or bumping your Android Gradle Plugin (AGP) version to 8.0 or higher: > Task :app:processDebugMainManifest FAILED Error: Namespace not specified. Please specify a namespace in the module's build.gradle file like so: android { namespace 'com.example.myapp' } This build failure is not a Flutter bug; it is a deliberate architectural change in the Android build ecosystem that breaks older project templates. The Root Cause: AGP 8.0 and the Manifest Prior to Android Gradle Plugin 8.0, the  package  attribute in your  AndroidManifest.xml  served two distinct purposes: Application ID:  It uniquely identified your app on the Google Play Store and on the device. Java/Kotlin Namespace:  It determined the package structure for generated classes like  R.java  (resources) and  BuildConfig.java . AGP 8.0 officially removed support for using ...

  Mobile operating systems are hostile environments for background execution. If your Flutter app attempts to fetch location updates, sync a database, or maintain a WebSocket connection while the user has the app minimized (or worse, swiped away), iOS and Android will relentlessly kill the process to preserve battery life. The concept of "keeping the app alive" does not exist natively. Instead, you must negotiate with the OS for execution windows. Choosing the wrong tool—specifically between  workmanager  and  flutter_background_service —leads to silent failures, negative App Store reviews, and inconsistent behavior across devices. The Root Cause: Doze, Buckets, and The Watchdog To solve this, we must understand why the OS kills your Dart code. Android's Doze & App Standby:  Since Android 6.0, the system groups apps into "buckets" (Active, Working Set, Frequent, Rare). If your app is not in the foreground, it loses network access and CPU cycles. Android requ...