在CameraX接口中切换摄像头可以通过以下步骤实现:
implementation 'androidx.camera:camera-camera2:1.0.0'
implementation 'androidx.camera:camera-lifecycle:1.0.0'
implementation 'androidx.camera:camera-view:1.0.0-alpha23'
<androidx.camera.view.PreviewView
android:id="@+id/previewView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
private fun startCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener(Runnable {
val cameraProvider = cameraProviderFuture.get()
bindPreview(cameraProvider)
}, ContextCompat.getMainExecutor(this))
}
private fun bindPreview(cameraProvider: ProcessCameraProvider) {
val preview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(previewView.createSurfaceProvider())
}
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
cameraProvider.unbindAll()
cameraProvider.bindToLifecycle(this, cameraSelector, preview)
} catch (exc: Exception) {
Log.e(TAG, "Error binding camera", exc)
}
}
private fun switchCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener(Runnable {
val cameraProvider = cameraProviderFuture.get()
val cameraSelector = if (currentCameraSelector == CameraSelector.DEFAULT_BACK_CAMERA) {
CameraSelector.DEFAULT_FRONT_CAMERA
} else {
CameraSelector.DEFAULT_BACK_CAMERA
}
bindPreview(cameraProvider, cameraSelector)
}, ContextCompat.getMainExecutor(this))
}
在这个例子中,我们使用CameraSelector.DEFAULT_BACK_CAMERA和CameraSelector.DEFAULT_FRONT_CAMERA来选择后置摄像头和前置摄像头。bindPreview()方法用于重新绑定相机预览。
这是一个简单的示例,展示了如何在CameraX接口中切换摄像头。根据具体的应用需求,你可以进一步扩展和优化这个功能。如果你想了解更多关于CameraX的详细信息和使用方法,可以参考腾讯云的CameraX产品文档:CameraX产品介绍。
领取专属 10元无门槛券
手把手带您无忧上云