Скачать или смотреть Capturing Photos in Landscape Mode with the Camera2 API

Learn how to easily capture photos in landscape orientation using the Camera2 API in your Android app without relying on the device's auto-rotate feature.
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This video is based on the question https://stackoverflow.com/q/67211980/ asked by the user 'Georgi Tasev' ( https://stackoverflow.com/u/14937667/ ) and on the answer https://stackoverflow.com/a/67213894/ provided by the user 'Georgi Tasev' ( https://stackoverflow.com/u/14937667/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Capturing Photos in Landscape Mode with the Camera2 API: A Simple Solution

Capturing photos in the correct orientation is crucial for any photography application. If you’re working with the Android Camera2 API, you might encounter a challenge: how to take a photo in landscape mode, even if your device’s auto-rotate feature is turned off. This guide will guide you through the problem and provide a clear solution to ensure your photos are always captured in the desired orientation.

The Challenge

Imagine you have an Android application that utilizes the Camera2 API for photo capture. You want to allow users to take pictures physically rotating their device to landscape orientation, but without having to enable the auto-rotate feature. Many developers face the challenge of not being able to capture images in landscape orientation due to default settings.

A Common Approach

A common approach many developers use to determine image orientation is through the WindowManager. They might create an orientation mapping based on the rotation of the device. However, some developers find that their images are still being captured in portrait mode regardless of the physical orientation.

Here's a snippet of what such a problematic implementation might look like:

[[See Video to Reveal this Text or Code Snippet]]

Despite this setup, developers might notice their images are consistently saved in portrait orientation. Fortunately, there is a straightforward solution to this issue.

The Solution

To successfully capture photos in landscape orientation, it’s essential to review how you define and utilize the rotation variable, ensuring it is linked correctly to the camera capture request. Here’s how to resolve the problem step-by-step:

Step 1: Modify the Capture Logic

Replace the existing code that sets the JPEG orientation with a more thorough check based on the device's orientation. Your capture method should look something like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Setup Image Reader and Capture Request

After setting up the JPEG orientation correctly, ensure that you're managing the image reader and capture request accurately within your method. Optimize your session creation as follows:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Handle Image Availability

Finally, utilize the OnImageAvailableListener to manage the images being captured. Ensure your image bytes are saved efficiently and that you handle exceptions appropriately.

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By following the recommended modifications to your capture logic and ensuring correct usage of the rotation variable, you can successfully capture images in landscape mode using the Camera2 API without relying on the device's auto-rotate feature. This solution enhances user experience for photography applications, allowing for greater control over image orientation.

Now you’re all set to capture stunning landscape photos effortlessly! Feel free to modify the examples to fit your app's needs. Happy coding!