CameraController example

[Peter Varga]

There is a great article on Medium about how to use the new CameraController.

The only problem is that there is no complete example so I can't see where to insert this into the initialization flow. 

I tried to search on internet but did not find any example at all. I write java code but in fact any language would be fine, could you please provide some example (complete with creating the use cases till the camera is ready) or give a link to one?

Thanks in advance,

Peter Varga

[Husayn Abdul-hakeem]

Hi Peter,

This Fragment (and its corresponding layout) is an example of how to use CameraController with the various features it supports, and it's in Java :)

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[Peter Varga]

Thank you very much, this is a great help! 

Peter

[Peter Varga]

Hi Husayn,

my code is already much nicer using CameraController so thanks for the example. I have some questions however.

- how can I check if the camera has flash? This used to be the hasFlashUnit() of camera class I thing, but I can't find any similar in cameracontroller, nor any way to reach the camera from it.1111

- is there any way to attach a listener to tap focus event? I would like to draw a circle on the focus point but could not find any way with CameraController.

Could you please help? 

Thanks in advance,

Peter

[Husayn Abdul-hakeem]

Hi Peter,

I'm glad the CameraController sample helped you.

1. `CameraController` will include a new API `getCameraInfo()` in the next release, it should allow you to get information about the camera in use, including flash availability.

This means that after CameraX's initialization (`getInitializationFuture()`), you can call `controller.getCameraInfo().hasFlashUnit()`

2. You might be able to attach a touch listener to the controller's attached `PreviewView`, and handle touch tap events. Make sure to return false from the TouchListener so that CameraController also consumes the tap event and focuses on the tap region.

previewView.setOnTouchListener((v, event) -> {

    // Draw the focus ring if it's a tap event

    return false; // Allow other listeners to consume the event

})