Mastering CameraX API

Transcript

15. CameraActivity override fun onCreate(savedInstanceState: Bundle?) { ... if (allPermissionsGranted()) { textureView.post { startCamera() } } else { ActivityCompat.requestPermissions( this, REQUIRED_PERMISSIONS, REQUEST_CODE_PERMISSIONS) } viewFinder.addOnLayoutChangeListener { _, _, _, _, _, _, _, _, _ -> updateTransform() } }
16. CameraActivity private fun startCamera() { val previewConfig = PreviewConfig.Builder().apply { setTargetAspectRatio(Rational(1, 1)) setTargetResolution(Size(640, 640)) }.build() val preview = Preview(previewConfig) preview.setOnPreviewOutputUpdateListener { val parent = textureView.parent as ViewGroup parent.removeView(textureView) parent.addView(textureView, 0) textureView.surfaceTexture = it.surfaceTexture updateTransform() } CameraX.bindToLifecycle(this, preview) }
17. CameraActivity private fun startCamera() { val previewConfig = PreviewConfig.Builder().apply { setTargetAspectRatio(Rational(1, 1)) setTargetResolution(Size(640, 640)) }.build() val preview = Preview(previewConfig) preview.setOnPreviewOutputUpdateListener { val parent = textureView.parent as ViewGroup parent.removeView(textureView) parent.addView(textureView, 0) textureView.surfaceTexture = it.surfaceTexture updateTransform() } CameraX.bindToLifecycle(this, preview) }
18. CameraActivity private fun startCamera() { val previewConfig = PreviewConfig.Builder().apply { setTargetAspectRatio(Rational(1, 1)) setTargetResolution(Size(640, 640)) }.build() val preview = Preview(previewConfig) preview.setOnPreviewOutputUpdateListener { val parent = textureView.parent as ViewGroup parent.removeView(textureView) parent.addView(textureView, 0) textureView.surfaceTexture = it.surfaceTexture updateTransform() } CameraX.bindToLifecycle(this, preview) }
19. CameraActivity private fun updateTransform() { val matrix = Matrix() val centerX = textureView.width / 2f val centerY = textureView.height / 2f val rotationDegrees = when(textureView.display.rotation) { Surface.ROTATION_0 -> 0 Surface.ROTATION_90 -> 90 Surface.ROTATION_180 -> 180 Surface.ROTATION_270 -> 270 else -> return } matrix.postRotate(-rotationDegrees.toFloat(), centerX, centerY) // Finally, apply transformations to our TextureView textureView.setTransform(matrix) }
20. CameraActivity private fun updateTransform() { val matrix = Matrix() val centerX = textureView.width / 2f val centerY = textureView.height / 2f val rotationDegrees = when(textureView.display.rotation) { Surface.ROTATION_0 -> 0 Surface.ROTATION_90 -> 90 Surface.ROTATION_180 -> 180 Surface.ROTATION_270 -> 270 else -> return } matrix.postRotate(-rotationDegrees.toFloat(), centerX, centerY) textureView.setTransform(matrix) }
21. PREVIEW
23. private fun startCamera() { val imageCaptureConfig = ImageCaptureConfig.Builder() .setTargetRotation(windowManager.defaultDisplay.rotation) .setLensFacing(lensFacing) .setFlashMode(FlashMode.ON) .build() val imageCapture = ImageCapture(imageCaptureConfig) } CameraActivity
24. private fun startCamera() { buttonCaptureImage.setOnClickListener { val file = File(externalMediaDirs.first(), "camerax_demo_${System.currentTimeMillis()}.jpg") imageCapture.takePicture(file, object : ImageCapture.OnImageSavedListener { override fun onError(error: ImageCapture.UseCaseError,message: String, exc: Throwable?) { //handle Error } override fun onImageSaved(file: File) { //image saved } }) } CameraActivity
25. private fun startCamera() { val imageCaptureConfig = ImageCaptureConfig.Builder() ........ buttonCaptureImage.setOnClickListener { ........ } } CameraX.bindToLifecycle(this, preview, imageCapture) CameraActivity
26. WE ARE DONE
27. Amazing Features of CameraX
28. fun startCamera() { val analysisConfig = ImageAnalysisConfig.Builder() .setTargetAspectRatio(aspectRatio) .setTargetRotation(rotation) .setTargetResolution(resolution) .setImageReaderMode(readerMode) .setImageQueueDepth(queueDepth) .build() val analysis = ImageAnalysis(analysisConfig) analysis.setAnalyzer { image, rotationDegrees -> //handle your task } CameraX.bindToLifecycle(this,preview,imageCapture,analysis) } CameraActivity
29. fun startCamera() { val analysisConfig = ImageAnalysisConfig.Builder() .setTargetAspectRatio(aspectRatio) .setTargetRotation(rotation) .setTargetResolution(resolution) .setImageReaderMode(readerMode) .setImageQueueDepth(queueDepth) .build() val analysis = ImageAnalysis(analysisConfig) analysis.setAnalyzer { image, rotationDegrees -> //handle your task } CameraX.bindToLifecycle(this,preview,imageCapture,analysis) } CameraActivity
30. fun startCamera() { val analysisConfig = ImageAnalysisConfig.Builder() ..... .build() val analysis = ImageAnalysis(analysisConfig) analysis.setAnalyzer { image, rotationDegrees -> //handle your task } CameraX.bindToLifecycle(this,preview,imageCapture,analysis) } CameraActivity
31. Bokeh, Night-Mode, HDR fun startCamera(){ val builder = ImageCaptureConfig.Builder() val bokehImageCapture = BokehImageCaptureExtender.create(builder) // Query if extension is available (optional). if (bokehImageCapture.isExtensionAvailable()) { // Enable the extension if available. bokehImageCapture.enableExtension() } val config = builder.build() val imageCapture = ImageCapture(config) CameraX.bindToLifecycle(this, imageCapture) }
32. Let’s End It Thanks
33. Any Questions For More Amazing Android Content visit blog.mindorks.com