如何在App中集成Android PreviewView

要在App中集成Android PreviewView，您需要按照以下步骤操作：

1. 在您的App的build.gradle文件中添加相应的依赖：

implementation 'androidx.camera:camera-camera2:1.0.0-beta01' implementation 'androidx.camera:camera-lifecycle:1.0.0-beta01' 

2. 在您的布局文件中添加PreviewView：

<androidx.camera.view.PreviewView     android:id="@+id/previewView"     android:layout_width="match_parent"     android:layout_height="match_parent" /> 

3. 在您的Activity或Fragment中初始化PreviewView并启动相机预览：

private lateinit var previewView: PreviewView private lateinit var cameraProvider: ProcessCameraProvider  override fun onCreate(savedInstanceState: Bundle?) {     super.onCreate(savedInstanceState)     setContentView(R.layout.activity_main)      previewView = findViewById(R.id.previewView)      val cameraProviderFuture = ProcessCameraProvider.getInstance(this)     cameraProviderFuture.addListener({         cameraProvider = cameraProviderFuture.get()          val preview = Preview.Builder().build()         preview.setSurfaceProvider(previewView.surfaceProvider)          val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA         cameraProvider.bindToLifecycle(this, cameraSelector, preview)      }, ContextCompat.getMainExecutor(this)) } 

4. 运行您的App并查看摄像头预览在PreviewView中显示的效果。

通过以上步骤，您可以在您的App中成功集成Android PreviewView。