Overview I'm making a smartphone app with flutter. Redux is used for state management. Save the data I want to keep even if the...

Situation (It's a mistake to say from the conclusion ...) I convert DateTime type variable to String with dart and save it in shared...

Situation There is a class that regulates the operation of the application. The "Change settings" screen takes a copy of the existing...

Overview When placing a widget in a Column in Flutter, you can set the left or right position to start with the crossAxisAligment...

Overview In the smartphone application, if you want to retain the data even after the application is closed, get the value of the...

Overview When creating a smartphone app with flutter, you may want to open other apps directly. This time, I will show you how to open a...

Phenomenon When I try to make an apk with flutter for publication with Google Pay and do flutter build apk, the above error occurs and I...

Overview When creating the UI of an app with flutter, the alignment of Text and other widgets may appear to be slightly out of alignment....

phenomenon You can use the Stack () widget in flutter to stack another widget on top of one. However, if the upper widget protrudes from...

Overview In many cases, you want to retain the data set by the user even after the application is closed. If you are using redux for...

Overview In the smartphone app, there is a type of page that appears on the spot without changing the screen (often in notifications,...

Overview That badge that shows the number of notifications that are often used on many app like LINE. I had to make it with my own app,...

Overview If heavy processing is applied while creating an application with Flutter, the operation of the application will become heavy....

Overview You may want to run heavy processing on a different isolate to make the operation lighter. Basically, you can use the compute()...

Overview Suddenly the above error message appears and the app crashes. As in the error message and the article on the net, adding...

Overview When making an app, I think there are many occasions when you use a calendar. Even so, you may want to display the icon image...

Overview You can easily create notifications using flutter's library called local_notification. This time, I will show you how to make...

Overview You can create notifications using a library called local_notification. The official sample only has a title and body, but you...

Overview You can easily create notifications using a library called flutter_local_notificaton. However, if you turn off the app once...

Overview A library called flutter_local_notification makes it easy to create regular notifications. However, this library only provides...