221 lines
8.0 KiB
Kotlin
221 lines
8.0 KiB
Kotlin
package cash.z.ecc.android.ui.scan
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import android.content.Context
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import android.content.pm.PackageManager
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import android.os.Bundle
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import android.util.DisplayMetrics
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import android.view.LayoutInflater
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import android.view.View
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import androidx.camera.core.AspectRatio
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import androidx.camera.core.CameraSelector
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import androidx.camera.core.ImageAnalysis
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import androidx.camera.core.ImageProxy
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import androidx.camera.core.Preview
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import androidx.camera.lifecycle.ProcessCameraProvider
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import androidx.core.content.ContextCompat
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import cash.z.ecc.android.R
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import cash.z.ecc.android.databinding.FragmentScanBinding
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import cash.z.ecc.android.di.viewmodel.activityViewModel
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import cash.z.ecc.android.di.viewmodel.viewModel
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import cash.z.ecc.android.ext.onClickNavBack
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import cash.z.ecc.android.feedback.Report
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import cash.z.ecc.android.feedback.Report.Tap.SCAN_BACK
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import cash.z.ecc.android.sdk.ext.twig
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import cash.z.ecc.android.ui.base.BaseFragment
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import cash.z.ecc.android.ui.send.SendViewModel
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import com.google.common.util.concurrent.ListenableFuture
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import kotlinx.coroutines.launch
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import java.util.concurrent.ExecutorService
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import java.util.concurrent.Executors
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class ScanFragment : BaseFragment<FragmentScanBinding>() {
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override val screen = Report.Screen.SCAN
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private val viewModel: ScanViewModel by viewModel()
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private val sendViewModel: SendViewModel by activityViewModel()
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private lateinit var cameraProviderFuture: ListenableFuture<ProcessCameraProvider>
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private var cameraExecutor: ExecutorService? = null
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override fun inflate(inflater: LayoutInflater): FragmentScanBinding =
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FragmentScanBinding.inflate(inflater)
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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super.onViewCreated(view, savedInstanceState)
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if (cameraExecutor != null) cameraExecutor?.shutdown()
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cameraExecutor = Executors.newSingleThreadExecutor()
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binding.backButtonHitArea.onClickNavBack() { tapped(SCAN_BACK) }
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}
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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if (!allPermissionsGranted()) getRuntimePermissions()
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}
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override fun onAttach(context: Context) {
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super.onAttach(context)
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cameraProviderFuture = ProcessCameraProvider.getInstance(context)
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cameraProviderFuture.addListener(
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Runnable {
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bindPreview(cameraProviderFuture.get())
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},
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ContextCompat.getMainExecutor(context)
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)
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}
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override fun onDestroyView() {
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super.onDestroyView()
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cameraExecutor?.shutdown()
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cameraExecutor = null
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}
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private fun bindPreview(cameraProvider: ProcessCameraProvider) {
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// Most of the code here is adapted from: https://github.com/android/camera-samples/blob/master/CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt
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// it's worth keeping tabs on that implementation because they keep making breaking changes to these APIs!
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// Get screen metrics used to setup camera for full screen resolution
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val metrics = DisplayMetrics().also { binding.preview.display.getRealMetrics(it) }
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val screenAspectRatio = aspectRatio(metrics.widthPixels, metrics.heightPixels)
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val rotation = binding.preview.display.rotation
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val preview =
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Preview.Builder().setTargetName("Preview").setTargetAspectRatio(screenAspectRatio)
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.setTargetRotation(rotation).build()
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val cameraSelector = CameraSelector.Builder()
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.requireLensFacing(CameraSelector.LENS_FACING_BACK)
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.build()
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val imageAnalysis = ImageAnalysis.Builder().setTargetAspectRatio(screenAspectRatio)
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.setTargetRotation(rotation)
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.setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
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.build()
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imageAnalysis.setAnalyzer(
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cameraExecutor!!,
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QrAnalyzer { q, i ->
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onQrScanned(q, i)
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}
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)
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// Must unbind the use-cases before rebinding them
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cameraProvider.unbindAll()
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try {
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cameraProvider.bindToLifecycle(this, cameraSelector, preview, imageAnalysis)
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preview.setSurfaceProvider(binding.preview.surfaceProvider)
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} catch (t: Throwable) {
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// TODO: consider bubbling this up to the user
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mainActivity?.feedback?.report(t)
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twig("Error while opening the camera: $t")
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}
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}
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/**
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* Adapted from: https://github.com/android/camera-samples/blob/master/CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt#L350
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*/
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private fun aspectRatio(width: Int, height: Int): Int {
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val previewRatio = kotlin.math.max(width, height).toDouble() / kotlin.math.min(
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width,
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height
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)
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if (kotlin.math.abs(previewRatio - (4.0 / 3.0))
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<= kotlin.math.abs(previewRatio - (16.0 / 9.0))
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) {
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return AspectRatio.RATIO_4_3
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}
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return AspectRatio.RATIO_16_9
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}
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private fun onQrScanned(qrContent: String, image: ImageProxy) {
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resumedScope.launch {
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val parsed = viewModel.parse(qrContent)
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if (parsed == null) {
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val network = viewModel.networkName
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binding.textScanError.text = getString(R.string.scan_invalid_address, network, qrContent)
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image.close()
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} else { /* continue scanning*/
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binding.textScanError.text = ""
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sendViewModel.toAddress = parsed
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mainActivity?.safeNavigate(R.id.action_nav_scan_to_nav_send)
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}
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}
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}
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// private fun updateOverlay(detectedObjects: DetectedObjects) {
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// if (detectedObjects.objects.isEmpty()) {
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// return
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// }
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//
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// overlay.setSize(detectedObjects.imageWidth, detectedObjects.imageHeight)
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// val list = mutableListOf<BoxData>()
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// for (obj in detectedObjects.objects) {
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// val box = obj.boundingBox
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// val name = "${categoryNames[obj.classificationCategory]}"
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// val confidence =
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// if (obj.classificationCategory != FirebaseVisionObject.CATEGORY_UNKNOWN) {
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// val confidence: Int = obj.classificationConfidence!!.times(100).toInt()
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// "$confidence%"
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// } else {
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// ""
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// }
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// list.add(BoxData("$name $confidence", box))
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// }
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// overlay.set(list)
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// }
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//
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// Permissions
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//
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private val requiredPermissions: Array<String?>
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get() {
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return try {
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val info = mainActivity?.packageManager
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?.getPackageInfo(mainActivity?.packageName ?: "", PackageManager.GET_PERMISSIONS)
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val ps = info?.requestedPermissions
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if (ps != null && ps.isNotEmpty()) {
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ps
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} else {
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arrayOfNulls(0)
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}
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} catch (e: Exception) {
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arrayOfNulls(0)
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}
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}
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private fun allPermissionsGranted(): Boolean {
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for (permission in requiredPermissions) {
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if (!isPermissionGranted(mainActivity!!, permission!!)) {
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return false
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}
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}
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return true
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}
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private fun getRuntimePermissions() {
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val allNeededPermissions = arrayListOf<String>()
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for (permission in requiredPermissions) {
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if (!isPermissionGranted(mainActivity!!, permission!!)) {
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allNeededPermissions.add(permission)
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}
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}
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if (allNeededPermissions.isNotEmpty()) {
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requestPermissions(allNeededPermissions.toTypedArray(), CAMERA_PERMISSION_REQUEST)
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}
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}
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companion object {
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private const val CAMERA_PERMISSION_REQUEST = 1002
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private fun isPermissionGranted(context: Context, permission: String): Boolean {
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return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED
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}
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}
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}
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