Google Developers have created an official Code Lab where they have shown the implementation of clicking images and recording videos using CameraX
This is the link: https://developer.android.com/codelabs/camerax-getting-started#0
These are some other links you can refer to:
- Does CameraX support to record video with Kotlin?
- Can I record video with CameraX (Android Jetpack)?
- Does CameraX support to record video with Kotlin?
- https://github.com/android/camera-samples
I have also programmed the Google CodeLab myself (just the video part)
This is my GitHub repo for the same: https://github.com/aatmanvaidya/CameraX-Video-App
I am attaching the code also below.
bulid.gradle(app)
def camerax_version = "1.2.0-alpha02"
// The following line is optional, as the core library is included indirectly by camera-camera2
implementation "androidx.camera:camera-core:${camerax_version}"
implementation "androidx.camera:camera-camera2:${camerax_version}"
// If you want to additionally use the CameraX Lifecycle library
implementation "androidx.camera:camera-lifecycle:${camerax_version}"
// If you want to additionally use the CameraX VideoCapture library
implementation "androidx.camera:camera-video:${camerax_version}"
// If you want to additionally use the CameraX View class
implementation "androidx.camera:camera-view:${camerax_version}"
// If you want to additionally add CameraX ML Kit Vision Integration
implementation "androidx.camera:camera-mlkit-vision:${camerax_version}"
// If you want to additionally use the CameraX Extensions library
implementation "androidx.camera:camera-extensions:${camerax_version}"
buildFeatures {
viewBinding true
}
In AndroidManifest.xml add permissions
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="28" />
**activity_main.xml**
<?xml version="1.0" encoding="utf-8"?>
<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"
tools:context=".MainActivity">
<Button
android:id="@+id/video_capture_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="@string/start_capture"
app:layout_constraintBottom_toBottomOf="@+id/viewFinder"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<androidx.camera.view.PreviewView
android:id="@+id/viewFinder"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0">
</androidx.camera.view.PreviewView>
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.kt
class MainActivity : AppCompatActivity() {
private lateinit var viewBinding: ActivityMainBinding
private var videoCapture: VideoCapture<Recorder>? = null
private var recording: Recording? = null
private lateinit var cameraExecutor: ExecutorService
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
viewBinding = ActivityMainBinding.inflate(layoutInflater)
setContentView(viewBinding.root)
if (allPermissionsGranted()) {
startCamera()
} else {
ActivityCompat.requestPermissions(
this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS
)
}
viewBinding.videoCaptureButton.setOnClickListener { captureVideo() }
cameraExecutor = Executors.newSingleThreadExecutor()
}
private fun captureVideo() {
val videoCapture = this.videoCapture ?: return
viewBinding.videoCaptureButton.isEnabled = false
val curRecording = recording
if (curRecording != null) {
curRecording.stop()
recording = null
return
}
// create and start a new recording session
val name = SimpleDateFormat(FILENAME_FORMAT, Locale.US)
.format(System.currentTimeMillis())
val contentValues = ContentValues().apply {
put(MediaStore.MediaColumns.DISPLAY_NAME, name)
put(MediaStore.MediaColumns.MIME_TYPE, "video/mp4")
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.P) {
put(MediaStore.Video.Media.RELATIVE_PATH, "Movies/CameraX-Video")
}
}
val mediaStoreOutputOptions = MediaStoreOutputOptions
.Builder(contentResolver, MediaStore.Video.Media.EXTERNAL_CONTENT_URI)
.setContentValues(contentValues)
.build()
recording = videoCapture.output
.prepareRecording(this, mediaStoreOutputOptions)
.apply {
if (PermissionChecker.checkSelfPermission(
this@MainActivity,
Manifest.permission.RECORD_AUDIO
) ==
PermissionChecker.PERMISSION_GRANTED
) {
withAudioEnabled()
}
}
.start(ContextCompat.getMainExecutor(this)) { recordEvent ->
//lambda event listener
when (recordEvent) {
is VideoRecordEvent.Start -> {
viewBinding.videoCaptureButton.apply {
text = getString(R.string.stop_capture)
isEnabled = true
}
}
is VideoRecordEvent.Finalize -> {
if (!recordEvent.hasError()) {
val msg =
"Video capture succeeded: " + "${recordEvent.outputResults.outputUri}"
Toast.makeText(baseContext, msg, Toast.LENGTH_SHORT).show()
Log.d(TAG, msg)
} else {
recording?.close()
recording = null
Log.e(TAG, "Video capture ends with error: " + "${recordEvent.error}")
}
viewBinding.videoCaptureButton.apply {
text = getString(R.string.start_capture)
isEnabled = true
}
}
}
}
}
private fun startCamera() {
val cameraProviderFuture = ProcessCameraProvider.getInstance(this)
cameraProviderFuture.addListener({
// Used to bind the lifecycle of cameras to the lifecycle owner
val cameraProvider: ProcessCameraProvider = cameraProviderFuture.get()
// Preview
val preview = Preview.Builder()
.build()
.also {
it.setSurfaceProvider(viewFinder.surfaceProvider)
}
val recorder = Recorder.Builder()
.setQualitySelector(QualitySelector.from(Quality.HIGHEST))
.build()
videoCapture = VideoCapture.withOutput(recorder)
// Select back camera as a default
val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
try {
// Unbind use cases before rebinding
cameraProvider.unbindAll()
// Bind use cases to camera
cameraProvider.bindToLifecycle(this, cameraSelector, preview, videoCapture)
} catch (exc: Exception) {
Log.e(TAG, "Use case binding failed", exc)
}
}, ContextCompat.getMainExecutor(this))
}
override fun onRequestPermissionsResult(
requestCode: Int, permissions: Array<String>, grantResults:
IntArray
) {
if (requestCode == REQUEST_CODE_PERMISSIONS) {
if (allPermissionsGranted()) {
startCamera()
} else {
Toast.makeText(
this,
"Permissions not granted by the user.",
Toast.LENGTH_LONG
).show()
finish()
}
}
}
private fun allPermissionsGranted() = REQUIRED_PERMISSIONS.all {
ContextCompat.checkSelfPermission(
baseContext, it
) == PackageManager.PERMISSION_GRANTED
}
override fun onDestroy() {
super.onDestroy()
cameraExecutor.shutdown()
}
companion object {
private const val TAG = "CameraXApp"
private const val FILENAME_FORMAT = "yyyy-MM-dd-HH-mm-ss-SSS"
private const val REQUEST_CODE_PERMISSIONS = 10
private val REQUIRED_PERMISSIONS =
mutableListOf(
Manifest.permission.CAMERA,
Manifest.permission.RECORD_AUDIO
).apply {
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.P) {
add(Manifest.permission.WRITE_EXTERNAL_STORAGE)
}
}.toTypedArray()
}
}
