Xamarin – How to create cross platform class?
Define cross interfaces in common project Define cross classes in common project Code functions in specific platform Usage in common project
Mobile App
React Native – All about setup
Android Setup Install Android Studio, Android SDK, emulator Create ~/.zshrc file Download Java if this error occurs Restart Mac or restart ~./zhsrc Add following scripts […]
Android – All about Build
What is .aab file? .aab file is Android App Bundle file. It contains only your app, it doesn’t have the necessary Android libs Is it […]
Xamarin – Development
How to update content of a label UI? Set Name to label element Set text programmatically How to display image from base64 string? How to […]
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