When I encrypt plain text using Dart,and encrypted text is decrypted from Java code, I get this error: Same IV, salt and passphase value using Java side for key generation, but the generated key is different and also cipher test is different. I am using same method for key generation. I don’t know what …
Tag: dart
how do I fix my flutter app not building with cloud firestore?
So I am new to flutter and firebase and I wanted to add firestore capabilities to my app, but when I tried to use firestore I got an error The plugin cloud_firestore requires a higher Android SDK version. │ │ Fix this issue by adding the following to the file │ │ C:UsersJaffStudioProjectspriv_chatandroidappbu…
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 ̵…
How to fix The following _CastError was thrown building: type ‘Future’ is not a subtype of type ‘List’ in type cast
I had tried to add behind the future and it doesn’t solve the problem. Moreover, there is a problem with the itemcount, so I left it with a number instead of add snapshot.data!.length() because I am not sure why there is an error with snapshot.data!.length() for itemcount. Answer Here is full working co…
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…
How to ‘put’ arguments from Swift native code to Flutter
I am trying to pass arguments from a callback method in Swift to Flutter. This is an example of what I want to achieve, in my native Java code: Edit: I am facing an issue, the argument args is undefined and I’m unsure what is the Swift equivalent of arguments.put() from the Java code above. This is my c…
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…
How to implement interface in-line instead of using a class in Dart/Flutter?
Is there any way to implement an interface in dart/flutter without having to use a class? Currently, how I implement it is with the code below However, I would like to implement these interface methods without having to use a class, just as I would in java. Something that would look like the code below. Answe…