乐工具技术知识在Android中，要启用PreviewView，您需要遵循以下步骤：
- 首先，确保您的项目已经导入了
androidx.camera2:camera-core和androidx.camera2:camera-preview库。在app的build.gradle文件中添加以下依赖项：
dependencies {
implementation 'androidx.camera2:camera-core:1.0.0'
implementation 'androidx.camera2:camera-preview:1.0.0'
}
- 在布局文件（例如activity_main.xml）中，添加一个TextureView来显示预览：
- 在Activity（例如MainActivity.java）中，初始化CameraProvider和Preview：
import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.graphics.ImageFormat; import android.os.Bundle; import android.view.TextureView; import androidx.annotation.NonNull; import androidx.camera2.core.CameraSelector; import androidx.camera2.core.ImageAnalysis; import androidx.camera2.core.ImageProxy; import androidx.camera2.core.Preview; import androidx.camera2.core.SurfaceTextureProvider; import androidx.camera2.core.UseCase; import androidx.camera2.core.VideoCapture; import androidx.camera2.core.VideoCaptureConfig; import androidx.camera2.ext.core.ImageAnalysisExtensions; import androidx.camera2.ext.core.ImageProxyExtensions; import androidx.camera2.ui.PreviewView; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.core.VideoCaptureConfig; import androidx.camera.core.ImageAnalysis; import androidx.camera.core.ImageProxy; import androidx.camera.core.Preview; import androidx.camera.core.SurfaceTextureProvider; import androidx.camera.core.VideoCapture; import androidx.camera.
