Tips for invoking an Android function from an AngularJS directive?

I am facing an issue with my HTML that uses an AngularJS directive. This HTML file is being used in an Android WebView, and I want to be able to call an Android method from this directive (Learn how to call Android method from JS here).

Below is the code for my directive:

return {
        restrict: 'A',
        link: function (scope, element, attrs) {
            scope.$watch('controller.isReady', function (value) {
                if (value === true) {
                    try {
                        Android.isReady();
                    } catch (e) {}
                }
            });  
        }
    }

Since I am using Typescript, I am encountering an error stating that Android is undefined. Even with pure AngularJS, the Android object would remain undefined.

Is there a way to resolve this issue so that I can successfully call an Android method from AngularJS?

javascriptandroidangularjstypescript

Answer №1

If you want to utilize the declare keyword with the Android object, you must follow this pattern:

interface AndroidApi {
    isReady(): void;
}

declare var Android: AndroidApi;

After this declaration, calling Android.isReady() will be recognized by the compiler.

Edit

For more information on ambient declarations, check out this resource: here.

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