java 使用CameraX调用系统相机 怎么配置CameraX
时间: 2023-11-24 13:06:59 浏览: 39
要使用CameraX调用系统相机,需要进行以下配置:
1. 在`build.gradle`文件中添加依赖项:
```
dependencies {
def camerax_version = "1.0.0-beta06"
implementation "androidx.camera:camera-core:$camerax_version"
implementation "androidx.camera:camera-camera2:$camerax_version"
}
```
2. 在AndroidManifest.xml文件中添加相机权限:
```
<uses-permission android:name="android.permission.CAMERA" />
```
3. 在布局文件中添加预览组件:
```
<androidx.camera.view.PreviewView
android:id="@+id/viewFinder"
android:layout_width="match_parent"
android:layout_height="match_parent" />
```
4. 在Activity或Fragment中,创建一个`ProcessCameraProvider`对象并初始化相机:
```
private fun startCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener(Runnable {
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
val preview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(viewFinder.surfaceProvider)
}
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
cameraProvider.unbindAll()
cameraProvider.bindToLifecycle(
this, cameraSelector, preview)
} catch(exc: Exception) {
Log.e(TAG, "Use case binding failed", exc)
}
}, ContextCompat.getMainExecutor(this))
}
```
以上是基本的CameraX配置,可以根据需求进行更多的配置,例如拍照或录像等。