How to send parameters to JAVA from DART using method channels. I am not able to send parameters to JAVA from DART using method channels. Please Please help . Error is attached below. What I am trying to do-->Dart(a,b)->Java(sum=a+b)->Dart(disp(sum))

[Spandan Bhandari]

After clicking the button I am getting below exceptions

[Ryan Gonzalez]

The map of arguments you're passing is:

<int, int>{

 a: 1,

 b: 2,

}

However, Dart isn't JS: keys in maps aren't automatically quoted. By this, I mean {a: 1} is not equivalent to {'a': 1} like in JavaScript. Instead, the key is the value of the variable a.

In this case, a is 1 and b is 2, so {a: 1, b: 2} is just {1: 1, 2: 2}. As a result, you're not actually passing arguments named "a" and "b", and the call.argument methods in Java are returning null.

--
You received this message because you are subscribed to the Google Groups "Flutter Development (flutter-dev)" group.
To unsubscribe from this group and stop receiving emails from it, send an email to flutter-dev...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/flutter-dev/932a736a-36d0-48cd-9723-ce614d877ea6%40googlegroups.com.

[Spandan Bhandari]

Thanks Solved :)

On Monday, September 23, 2019 at 9:33:48 AM UTC+5:45, Ryan Gonzalez wrote:

The map of arguments you're passing is:

<int, int>{

 a: 1,

 b: 2,

}

However, Dart isn't JS: keys in maps aren't automatically quoted. By this, I mean {a: 1} is not equivalent to {'a': 1} like in JavaScript. Instead, the key is the value of the variable a.

In this case, a is 1 and b is 2, so {a: 1, b: 2} is just {1: 1, 2: 2}. As a result, you're not actually passing arguments named "a" and "b", and the call.argument methods in Java are returning null.

On Sun, Sep 22, 2019, 3:52 AM Spandan Bhandari <spanndanb...@gmail.com> wrote:

After clicking the button I am getting below exceptions

--
You received this message because you are subscribed to the Google Groups "Flutter Development (flutter-dev)" group.

To unsubscribe from this group and stop receiving emails from it, send an email to flutt...@googlegroups.com.