在安卓系统中使用CameraX提高摄像头速度的方法如下:
implementation "androidx.camera:camera-camera2:1.0.0"
implementation "androidx.camera:camera-lifecycle:1.0.0"
implementation "androidx.camera:camera-view:1.0.0-alpha22"
<androidx.camera.view.CameraView
android:id="@+id/cameraView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
val cameraView: CameraView = findViewById(R.id.cameraView)
// 绑定生命周期
cameraView.lifecycleOwner = this
// 创建相机实例
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener({
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
// 配置预览用例
val preview = Preview.Builder().build().also {
it.setSurfaceProvider(cameraView.surfaceProvider)
}
// 配置相机选择用例
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
// 解绑之前的用例
cameraProvider.unbindAll()
// 绑定新的用例
cameraProvider.bindToLifecycle(this, cameraSelector, preview)
} catch (e: Exception) {
Log.e(TAG, "启动相机预览失败: ${e.message}")
}
}, ContextCompat.getMainExecutor(this))
CameraX的优势:
CameraX的应用场景:
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