Android – How to create a service run after rebooting the phone?
How to create a service like that? Create a Notification channel Create a Service and call a local notification with startForeground Start the above service […]
Software Development
Xamarin – Local notification for iOS (1)
How to create a local notification? Add permission check App.xaml.cs iOSNotificationManager.cs Send notification Use UNTimeIntervalNotificationTrigger to create a local notification immediately Use UNCalendarNotificationTrigger to create […]
Android – Update from targetSDK 28 to 29
Can’t create file Need to add android:requestLegacyExternalStorage=”true” https://developer.android.com/training/data-storage/use-cases#opt-out-scoped-storage Can’t get hardware serial number App crashes when calling Build.getSerial() best-practices-android-identifiers https://developer.android.com/reference/android/os/Build#getSerial()changes-to-device-identifiers-in.html Use ANDROID_ID for Android 10, […]
Xamarin – Local notification for Android (1)
Create a local notification How to build local notification for Android? Create a notification channel by NotificationManager Create an Activity intent Add title, message,.. Create […]
Mobile app – Google maps
How to implement Google map into Android app? Setup Google map API key Go to the Google Cloud Platform Console Select project a project Menu > […]
React Native – react-navigation (1)
Definition Definition Practice Basic How to get current route name? How to access navigation object? Use useNavigation hook How to go back? Tab bar How […]
React Native – Animated notification
Use react-native-dropdownalert Component Usage Add control state into App state Declare dropdown alert component next to Routing Update App state to display alert
React Native – Animation (1)
How to move a View from/ to positions? Points How to display a message moving from top to down? Create message View 3 required values […]
React Native – Hardware features (1)
How to take photo? Use react-native-camera or react-native-image-picker react-native-image-picker Class Usage How to browse photo library? Class Usage How to browse file? Use react-native-document-picker How […]
React Native – How to measure a view?
Use “onLayout” prop for a View Measure component Usage