视频捕获（MediaStore）＆上传到FireBase - Android Kotlin

下面是一个使用Kotlin在Android中实现视频捕获并上传到Firebase的示例代码：

首先，确保在build.gradle文件中添加了Firebase和CameraX的依赖项：

dependencies {
    implementation 'com.google.firebase:firebase-storage:20.0.0'
    implementation 'androidx.camera:camera-camera2:1.1.0-alpha02'
    implementation 'androidx.camera:camera-lifecycle:1.1.0-alpha02'
    implementation 'androidx.camera:camera-view:1.0.0-alpha21'
}

然后，在AndroidManifest.xml文件中添加相机和存储权限：

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

接下来，创建一个名为CameraActivity的新Activity，并在布局文件中添加一个预览视图和一个按钮来启动视频捕获：

class CameraActivity : AppCompatActivity() {

    private lateinit var cameraView: PreviewView
    private lateinit var captureButton: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_camera)

        cameraView = findViewById(R.id.cameraView)
        captureButton = findViewById(R.id.captureButton)

        captureButton.setOnClickListener {
            captureVideo()
        }
    }

    private fun captureVideo() {
        val videoFile = File(externalMediaDirs.first(), "video.mp4")

        val videoCapture = VideoCapture.Builder()
            .setTargetRotation(cameraView.display.rotation)
            .setTargetAspectRatio(AspectRatio.RATIO_16_9)
            .setTargetResolution(Size(1280, 720))
            .build()

        videoCapture.startRecording(videoFile, Executors.newSingleThreadExecutor(), object : VideoCapture.OnVideoSavedCallback {
            override fun onVideoSaved(file: File) {
                uploadVideo(file)
            }

            override fun onError(videoCaptureError: Int, message: String, cause: Throwable?) {
                Toast.makeText(this@CameraActivity, "视频捕获错误: $message", Toast.LENGTH_SHORT).show()
            }
        })
    }

    private fun uploadVideo(file: File) {
        val storageRef = FirebaseStorage.getInstance().reference
        val videoRef = storageRef.child("videos/${file.name}")

        val uploadTask = videoRef.putFile(file)

        uploadTask.addOnSuccessListener {
            Toast.makeText(this@CameraActivity, "视频上传成功", Toast.LENGTH_SHORT).show()
        }.addOnFailureListener {
            Toast.makeText(this@CameraActivity, "视频上传失败: ${it.message}", Toast.LENGTH_SHORT).show()
        }
    }
}

最后，创建一个名为activity_camera.xml的布局文件，其中包含一个PreviewView和一个Button：

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.camera.view.PreviewView
        android:id="@+id/cameraView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toTopOf="@id/captureButton"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/captureButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:text="开始捕获视频"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

这个示例代码将在点击按钮时开始视频捕获，并将捕获的视频文件上传到Firebase存储中。请确保在Firebase控制台上设置了正确的存储规则，并在AndroidManifest.xml中添加了适当的权限。

希望这可以帮助你解决问题！