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CameraProviderCameraProvider:

importandroidx.camera.lifecycle.ProcessCameraProviderimportcom.google.common.util.concurrent.ListenableFutureclassMainActivity:AppCompatActivity(){privatelateinitvarcameraProviderFuture:ListenableFutureoverridefunonCreate(savedInstanceState:Bundle){cameraProviderFuture=ProcessCameraProvider.getInstance(this)}}Javaimportandroidx.camera.lifecycle.ProcessCameraProviderimportcom.google.common.util.concurrent.ListenableFuturepublicclassMainActivityextendsAppCompatActivity{privateListenableFuturecameraProviderFuture;@OverrideprotectedvoidonCreate(@NullableBundlesavedInstanceState){cameraProviderFuture=ProcessCameraProvider.getInstance(this);}}CameraProviderCameraProvider..:

cameraProviderFuture.addListener(Runnable{valcameraProvider=cameraProviderFuture.get()bindPreview(cameraProvider)},ContextCompat.getMainExecutor(this))JavacameraProviderFuture.addListener(()->{try{ProcessCameraProvidercameraProvider=cameraProviderFuture.get();bindPreview(cameraProvider);}catch(ExecutionException|InterruptedExceptione){//NoerrorsneedtobehandledforthisFuture.//Thisshouldneverbereached.}},ContextCompat.getMainExecutor(this));bindPreview.

CameraProvider:

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CameraXPreviewView:

PreviewViewView:

//viewFinderisaPreviewViewinstanceviewFinder.scaleType=PreviewView.ScaleType.FIT_CENTER