I'm trying to send a whatsapp message from my flutter app but I get the error: Unhandled Exception: MissingPluginException(No implementation found for method launch on channel plugins.flutter.io/url_launcher_android). Everything I found through my research did not work with me. please help me please.

    void openWhatsapp(
    {required BuildContext context,
      required String text,
      required String number}) async {
    var whatsapp = number; // 92xx enter like this
    var whatsappURlAndroid =
      "whatsapp://send?phone="   whatsapp   "&text=$text";
    var whatsappURLIos = "https://wa.me/$whatsapp?text=${Uri.tryParse(text)}";
    if (Platform.isIOS) {
    // for iOS phone only
    if (await canLaunchUrl(Uri.parse(whatsappURLIos))) {
      await launchUrl(Uri.parse(
        whatsappURLIos,
      ));
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text("Whatsapp not installed")));
    }
    } else {
    // android , web
    if (await canLaunchUrl(Uri.parse(whatsappURlAndroid))) {
      await launchUrl(Uri.parse(whatsappURlAndroid));
    } else {
      ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text("Whatsapp not installed")));
    }
    }
    }

I tried:

this

this

...

CodePudding user response：

Run flutter clean, then re-run/re-compile your project.Hot restart or hot reload is not enough.

CodePudding user response：

This happened to me one time and it has two causes:

• you didn't follow the url_launcher package's specific necessary configuration for your target devices.

• you didn't delete the build folder and run your app again, first run:
  

  flutter clean
  flutter pub get
  

  And re-run your app in the emulator/device ( Not hot restart, you need to stop your app, and run it again)

Hope this helps!