Java support

[AviranAbady]

Still using Fotoapparat 1.x Exploring the idea of upgrading to 2.x, getting some issues with upgrading the code (while remaining in Java)

Not sure how the following legacy code should be handled in 2.x:

Focus listener:

fotoApparat.focus().whenAvailable(new PendingResult.Callback<FocusResult>() {
            @Override
            public void onResult(FocusResult focusResult) {
                if (focusResult == FocusResult.Focused) {

                } else if (focusResult == FocusResult.UnableToFocus) {

                }
            }
        });

Pending result seem to have changed, not sure how to apply the current Kotlin callback machanism while still writing in Java. FocusResult enum is now an object type, should instanceof be used instead as a compare operator?

Taking a picture

fotoApparat.takePicture().toPendingResult().whenAvailable(new PendingResult.Callback<Photo>() {
                @Override
                public void onResult(Photo photo) {

                }

});

What's the proper way to handle the async operation / supplying the callback?

Please provide code examples.

[AviranAbady]

@Diolor @dmitry-zaitsev can you assist?

[AroundPixels]

@AviranAbady you can use Kotlin version with your Java code, no problem!

[AviranAbady]

Providing a code example, for everyone not familiar with Kotlin. Basicly Kotlin code can be integrated directly in the Java code, the callbacks should be defined as lambdas and return Unit.INSTANCE.

build.gradle

android {
   ...
   ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

 fotoApparat.takePicture().
                    toPendingResult().
                    whenAvailable(photo -> {
                       /* handle photo */
                        return Unit.INSTANCE;
                    });

fotoApparat.focus().whenAvailable(focusResult -> {

            return Unit.INSTANCE;
        });