How to use CameraX in an Android app?

CameraX, Android CameraX, CameraX tutorial, Android app development, CameraX example, Android camera library
Learn how to implement CameraX in your Android application with this detailed tutorial, including code examples and best practices.

Implementing CameraX in Android

CameraX is a Jetpack library that makes it easier to implement camera features in your Android apps. It provides an easy-to-use API and handles various device compatibility issues, allowing you to focus on the features of your app.

Step 1: Add Dependencies

To use CameraX in your project, add the following dependencies to your app's build.gradle file:

implementation "androidx.camera:camera-core:1.0.0" implementation "androidx.camera:camera-camera2:1.0.0" implementation "androidx.camera:camera-lifecycle:1.0.0" implementation "androidx.camera:camera-view:1.0.0"

Step 2: Set Up The Camera

Next, create a preview use case and bind it to the lifecycle of your activity. Here is a simple example:

// Setup the CameraX instance private void startCamera() { CameraX.unbindAll(); // Unbind use cases before rebinding Preview preview = new Preview.Builder().build(); CameraSelector cameraSelector = new CameraSelector.Builder() .requireLensFacing(CameraSelector.LENS_FACING_BACK) .build(); preview.setSurfaceProvider(viewFinder.createSurfaceProvider()); CameraX.bindToLifecycle(this, cameraSelector, preview); }

Step 3: Request Permissions

Before accessing the camera, you need to request the necessary permissions. Make sure to add the following permissions to your AndroidManifest.xml:

Step 4: Handling Permissions in Code

Request runtime permissions in your activity:

private void requestPermissions() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, REQUEST_CODE_CAMERA); } else { startCamera(); } }

Step 5: Run Your App

Now you can build and run your app. If permissions are correctly managed, you should see the camera preview displayed in your app!


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