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Tag: dart

How to fix app:lint error when building flutter app?

For some reason, all of a sudden my app cannot build anymore. First I had flutter devtools problem, then I upgraded to Flutter 2.8.1 and now my app cannot build. I tried upgrading Gradle to 7.3.3 and JDK 17 and still, my app cannot build, I searched the whole GitHub and StackOverflow and cannot find a solutio…

Flutter is unable to display video

Even though I had tried adding the dependencies and change the video link to a YouTube link instead, it still the same and does not display the video. May I know how to solve this problem? There are a few errors, I listed it as below: The method ‘VideoPlayer’ isn’t defined for the type &#821…

Flutter BLE Byte to Array conversion

I’m using the Flutter Blue library to build an app to connect to an IoT device. I was able to get the connection and the discovery of services to work. I want to send a command which is originally written in Java (NRF library). What is the dart equivalent for the above code? I have tried various combina…

Decrypt a Java AES encoded String in Dart

I need to decrypt an AES (PKCS#7) encoded string in my Flutter mobile application. The string is got from a QR Code, which has been generated from a Java application and contains the AES encoded String. The Java encoding : Output : AIRTEuNmSuQtYuysv93w3w83kJJ6sg7kaU7XzA8xrAjOp-lKYPp1brtDAPbhSJmT The Dart deco…