Скачать или смотреть Resolving the Camera 2 API Error That Prevents Photos from Being Taken

Discover how to troubleshoot and fix the Camera 2 API error that stops you from taking pictures on your Android device. In this guide, we provide insightful tips and organized steps to resolve common issues.
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This video is based on the question https://stackoverflow.com/q/62301357/ asked by the user 'morimoku2' ( https://stackoverflow.com/u/12852710/ ) and on the answer https://stackoverflow.com/a/62341487/ provided by the user 'Hannah Olukoye' ( https://stackoverflow.com/u/6924988/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing the Camera 2 API Error: Why You Can't Take Pictures

Are you finding yourself in a frustrating situation where your Android application's camera functionality just won’t cooperate? Perhaps when you attempt to take a picture, the camera seems to freeze or throws an error? You're not alone. Many developers encounter issues with the Camera 2 API, specifically the notorious Access denied finding property "persist.vendor.camera.privapp.list" error, which can leave you scratching your head. This guide aims to help you troubleshoot and resolve this issue effectively.

The Root of the Problem

The issue typically arises when the application lacks the necessary permissions to access the camera or write image files. Though you might have all the permissions correctly set in your Android manifest, it’s possible something might be going wrong at the request level. Below, we'll explore a solution that involves re-evaluating how you obtain those permissions before attempting to take a picture.

Step-by-Step Solution

1. Permission Handling

Before diving into any coding changes, let’s address how permissions should be handled:

Always request camera and writing permissions upfront:
Make sure you are obtaining the necessary permissions before trying to interact with the camera device.

2. Modify Your takePicture Method

Currently, your takePicture method includes permission checks, which may lead to issues. It's better to reorganize these checks. Here's how to streamline the code:

Remove the current permission check found in your takePicture method. This code should be executed before calling the method to avoid a prematurely failing request.

Here’s an example of what you need to remove:

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

3. Properly Request Permissions Before Camera Usage

Instead of checking permissions inside takePicture, handle them in a dedicated method or directly before you call takePicture. Here’s a conceptual approach:

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

4. Call Your Permission Handling First

Before taking a picture from your button’s click listener, call handlePermissions() instead:

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

5. Testing the Solution

After implementing these changes, make sure to thoroughly test the application:

Run the app and ensure that permission requests are being made as expected.

Try taking a picture and see if the error persists.

Check for logs to capture any new issues that may arise.

Conclusion

In summary, fixing the Camera 2 API Error requires proper management of permissions in Android. By ensuring you are requested for camera permissions upfront and adjusting where these checks occur in your application, you can largely mitigate issues when attempting to capture images. Do remember to run regular tests to ensure functionality!

If you still encounter issues or have further questions, feel free to reach out, and happy coding!