Encrypted overlay filesystems implementation for Android. Also available on GitHub: https://github.com/hardcore-sushi/DroidFS
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package sushi.hardcore.droidfs
import android.Manifest
import android.annotation.SuppressLint
import android.content.Context
import android.content.pm.PackageManager
import android.hardware.camera2.CameraCharacteristics
import android.hardware.camera2.CameraManager
import android.os.Build
import android.os.Bundle
import android.text.InputType
import android.util.Size
import android.view.*
import android.view.animation.Animation
import android.view.animation.LinearInterpolator
import android.view.animation.RotateAnimation
import android.widget.ImageView
import android.widget.RelativeLayout
import android.widget.Toast
import androidx.annotation.RequiresApi
import androidx.camera.camera2.interop.Camera2CameraInfo
import androidx.camera.core.*
import androidx.camera.extensions.ExtensionMode
import androidx.camera.extensions.ExtensionsManager
import androidx.camera.lifecycle.ProcessCameraProvider
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
import androidx.lifecycle.lifecycleScope
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import sushi.hardcore.droidfs.content_providers.RestrictedFileProvider
import sushi.hardcore.droidfs.databinding.ActivityCameraBinding
import sushi.hardcore.droidfs.util.PathUtils
import sushi.hardcore.droidfs.video_recording.SeekableWriter
import sushi.hardcore.droidfs.video_recording.VideoCapture
import sushi.hardcore.droidfs.widgets.CustomAlertDialogBuilder
import sushi.hardcore.droidfs.widgets.EditTextDialog
import java.io.ByteArrayInputStream
import java.io.ByteArrayOutputStream
import java.text.SimpleDateFormat
import java.util.*
import java.util.concurrent.Executor
class CameraActivity : BaseActivity(), SensorOrientationListener.Listener {
companion object {
private const val CAMERA_PERMISSION_REQUEST_CODE = 0
private const val AUDIO_PERMISSION_REQUEST_CODE = 1
private const val fileNameRandomMin = 100000
private const val fileNameRandomMax = 999999
private val dateFormat = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US)
private val random = Random()
}
private var timerDuration = 0
set(value) {
field = value
if (value > 0){
binding.imageTimer.setImageResource(R.drawable.icon_timer_on)
} else {
binding.imageTimer.setImageResource(R.drawable.icon_timer_off)
}
}
private var usf_keep_open = false
private lateinit var sensorOrientationListener: SensorOrientationListener
private var previousOrientation: Float = 0f
private lateinit var orientedIcons: List<ImageView>
private lateinit var gocryptfsVolume: GocryptfsVolume
private lateinit var outputDirectory: String
private var isFinishingIntentionally = false
private var isAskingPermissions = false
private var permissionsGranted = false
private lateinit var executor: Executor
private lateinit var cameraProvider: ProcessCameraProvider
private lateinit var extensionsManager: ExtensionsManager
private lateinit var cameraSelector: CameraSelector
private val cameraPreview = Preview.Builder().build()
private var imageCapture: ImageCapture? = null
private var videoCapture: VideoCapture? = null
private var camera: Camera? = null
private var resolutions: List<Size>? = null
private var currentResolutionIndex: Int = 0
private var currentResolution: Size? = null
private var captureMode = ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY
private var isBackCamera = true
private var isInVideoMode = false
private var isRecording = false
private var isWaitingForTimer = false
private lateinit var binding: ActivityCameraBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
usf_keep_open = sharedPrefs.getBoolean("usf_keep_open", false)
binding = ActivityCameraBinding.inflate(layoutInflater)
setContentView(binding.root)
supportActionBar?.hide()
gocryptfsVolume = GocryptfsVolume(applicationContext, intent.getIntExtra("sessionID", -1))
outputDirectory = intent.getStringExtra("path")!!
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){
permissionsGranted = true
} else {
isAskingPermissions = true
requestPermissions(arrayOf(Manifest.permission.CAMERA), CAMERA_PERMISSION_REQUEST_CODE)
}
} else {
permissionsGranted = true
}
executor = ContextCompat.getMainExecutor(this)
cameraPreview.setSurfaceProvider(binding.cameraPreview.surfaceProvider)
ProcessCameraProvider.getInstance(this).apply {
addListener({
cameraProvider = get()
ExtensionsManager.getInstanceAsync(this@CameraActivity, cameraProvider).apply {
addListener({
extensionsManager = get()
setupCamera()
}, executor)
}
}, executor)
}
binding.imageCaptureMode.setOnClickListener {
val currentIndex = if (captureMode == ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY) {
0
} else {
1
}
CustomAlertDialogBuilder(this, themeValue)
.setTitle(R.string.camera_optimization)
.setSingleChoiceItems(arrayOf(getString(R.string.maximize_quality), getString(R.string.minimize_latency)), currentIndex) { dialog, which ->
val resId: Int
val newCaptureMode = if (which == 0) {
resId = R.drawable.icon_high_quality
ImageCapture.CAPTURE_MODE_MAXIMIZE_QUALITY
} else {
resId = R.drawable.icon_speed
ImageCapture.CAPTURE_MODE_MINIMIZE_LATENCY
}
if (newCaptureMode != captureMode) {
captureMode = newCaptureMode
binding.imageCaptureMode.setImageResource(resId)
if (!isInVideoMode) {
cameraProvider.unbind(imageCapture)
refreshImageCapture()
cameraProvider.bindToLifecycle(this, cameraSelector, imageCapture)
}
}
dialog.dismiss()
}
.setNegativeButton(R.string.cancel, null)
.show()
}
binding.imageRatio.setOnClickListener {
resolutions?.let {
CustomAlertDialogBuilder(this, themeValue)
.setTitle(R.string.choose_resolution)
.setSingleChoiceItems(it.map { size -> size.toString() }.toTypedArray(), currentResolutionIndex) { dialog, which ->
currentResolution = resolutions!![which]
currentResolutionIndex = which
setupCamera()
dialog.dismiss()
}
.setNegativeButton(R.string.cancel, null)
.show()
}
}
binding.imageTimer.setOnClickListener {
with (EditTextDialog(this, R.string.enter_timer_duration) {
try {
timerDuration = it.toInt()
} catch (e: NumberFormatException) {
Toast.makeText(this, R.string.invalid_number, Toast.LENGTH_SHORT).show()
}
}) {
binding.dialogEditText.inputType = InputType.TYPE_CLASS_NUMBER
show()
}
}
binding.imageFlash.setOnClickListener {
binding.imageFlash.setImageResource(if (isInVideoMode) {
when (imageCapture?.flashMode) {
ImageCapture.FLASH_MODE_ON -> {
camera?.cameraControl?.enableTorch(false)
imageCapture?.flashMode = ImageCapture.FLASH_MODE_OFF
R.drawable.icon_flash_off
}
else -> {
camera?.cameraControl?.enableTorch(true)
imageCapture?.flashMode = ImageCapture.FLASH_MODE_ON
R.drawable.icon_flash_on
}
}
} else {
when (imageCapture?.flashMode) {
ImageCapture.FLASH_MODE_AUTO -> {
imageCapture?.flashMode = ImageCapture.FLASH_MODE_ON
R.drawable.icon_flash_on
}
ImageCapture.FLASH_MODE_ON -> {
imageCapture?.flashMode = ImageCapture.FLASH_MODE_OFF
R.drawable.icon_flash_off
}
else -> {
imageCapture?.flashMode = ImageCapture.FLASH_MODE_AUTO
R.drawable.icon_flash_auto
}
}
})
}
binding.imageModeSwitch.setOnClickListener {
isInVideoMode = !isInVideoMode
setupCamera()
binding.imageFlash.setImageResource(if (isInVideoMode) {
binding.recordVideoButton.visibility = View.VISIBLE
binding.takePhotoButton.visibility = View.GONE
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
isAskingPermissions = true
requestPermissions(arrayOf(Manifest.permission.RECORD_AUDIO), AUDIO_PERMISSION_REQUEST_CODE)
}
}
binding.imageModeSwitch.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.icon_photo)?.also {
it.setTint(ContextCompat.getColor(this, R.color.neutralIconTint))
})
imageCapture?.flashMode = ImageCapture.FLASH_MODE_OFF
R.drawable.icon_flash_off
} else {
binding.recordVideoButton.visibility = View.GONE
binding.takePhotoButton.visibility = View.VISIBLE
binding.imageModeSwitch.setImageResource(R.drawable.icon_video)
imageCapture?.flashMode = ImageCapture.FLASH_MODE_AUTO
R.drawable.icon_flash_auto
})
}
binding.imageCameraSwitch.setOnClickListener {
isBackCamera = if (isBackCamera) {
binding.imageCameraSwitch.setImageResource(R.drawable.icon_camera_back)
false
} else {
binding.imageCameraSwitch.setImageResource(R.drawable.icon_camera_front)
if (isInVideoMode) {
//reset flash state
imageCapture?.flashMode = ImageCapture.FLASH_MODE_OFF
binding.imageFlash.setImageResource(R.drawable.icon_flash_off)
}
true
}
resolutions = null
setupCamera()
}
binding.takePhotoButton.onClick = ::onClickTakePhoto
binding.recordVideoButton.setOnClickListener { onClickRecordVideo() }
orientedIcons = listOf(binding.imageRatio, binding.imageTimer, binding.imageCaptureMode, binding.imageFlash, binding.imageModeSwitch, binding.imageCameraSwitch)
sensorOrientationListener = SensorOrientationListener(this)
val scaleGestureDetector = ScaleGestureDetector(this, object : ScaleGestureDetector.SimpleOnScaleGestureListener(){
override fun onScale(detector: ScaleGestureDetector): Boolean {
val currentZoomRatio = camera?.cameraInfo?.zoomState?.value?.zoomRatio ?: 0F
camera?.cameraControl?.setZoomRatio(currentZoomRatio*detector.scaleFactor)
return true
}
})
binding.cameraPreview.setOnTouchListener { view, event ->
view.performClick()
when (event.action) {
MotionEvent.ACTION_DOWN -> true
MotionEvent.ACTION_UP -> {
val factory = binding.cameraPreview.meteringPointFactory
val point = factory.createPoint(event.x, event.y)
val action = FocusMeteringAction.Builder(point).build()
camera?.cameraControl?.startFocusAndMetering(action)
true
}
MotionEvent.ACTION_MOVE -> scaleGestureDetector.onTouchEvent(event)
else -> false
}
}
}
@RequiresApi(Build.VERSION_CODES.M)
override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
isAskingPermissions = false
if (grantResults.size == 1) {
when (requestCode) {
CAMERA_PERMISSION_REQUEST_CODE -> if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
permissionsGranted = true
setupCamera()
} else {
CustomAlertDialogBuilder(this, themeValue)
.setTitle(R.string.error)
.setMessage(R.string.camera_perm_needed)
.setCancelable(false)
.setPositiveButton(R.string.ok) { _, _ ->
isFinishingIntentionally = true
finish()
}.show()
}
AUDIO_PERMISSION_REQUEST_CODE -> if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (videoCapture != null) {
cameraProvider.unbind(videoCapture)
camera = cameraProvider.bindToLifecycle(this, cameraSelector, videoCapture)
}
}
}
}
}
private fun adaptPreviewSize(resolution: Size) {
val screenWidth = resources.displayMetrics.widthPixels
val screenHeight = resources.displayMetrics.heightPixels
var height = (resolution.height * (screenWidth.toFloat() / resolution.width)).toInt()
var width = screenWidth
if (height > screenHeight) {
width = (width * (screenHeight.toFloat() / height)).toInt()
height = screenHeight
}
binding.cameraPreview.layoutParams = RelativeLayout.LayoutParams(width, height).apply {
addRule(RelativeLayout.CENTER_IN_PARENT)
}
}
private fun refreshImageCapture() {
imageCapture = ImageCapture.Builder()
.setCaptureMode(captureMode)
.setFlashMode(imageCapture?.flashMode ?: ImageCapture.FLASH_MODE_AUTO)
.apply {
currentResolution?.let {
setTargetResolution(it)
}
}
.build()
}
private fun refreshVideoCapture() {
videoCapture = VideoCapture.Builder().apply {
currentResolution?.let {
setTargetResolution(it)
}
}.build()
}
@SuppressLint("RestrictedApi")
private fun setupCamera() {
if (permissionsGranted && ::extensionsManager.isInitialized && ::cameraProvider.isInitialized) {
cameraSelector = if (isBackCamera){ CameraSelector.DEFAULT_BACK_CAMERA } else { CameraSelector.DEFAULT_FRONT_CAMERA }
if (extensionsManager.isExtensionAvailable(cameraSelector, ExtensionMode.AUTO)) {
cameraSelector = extensionsManager.getExtensionEnabledCameraSelector(cameraSelector, ExtensionMode.AUTO)
}
cameraProvider.unbindAll()
val currentUseCase = (if (isInVideoMode) {
refreshVideoCapture()
camera = cameraProvider.bindToLifecycle(this, cameraSelector, cameraPreview, videoCapture)
videoCapture
} else {
refreshImageCapture()
camera = cameraProvider.bindToLifecycle(this, cameraSelector, cameraPreview, imageCapture)
imageCapture
})!!
adaptPreviewSize(currentResolution ?: currentUseCase.attachedSurfaceResolution!!.swap())
if (resolutions == null) {
val info = Camera2CameraInfo.from(camera!!.cameraInfo)
val cameraManager = getSystemService(Context.CAMERA_SERVICE) as CameraManager
val characteristics = cameraManager.getCameraCharacteristics(info.cameraId)
characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP)?.let { streamConfigurationMap ->
resolutions = streamConfigurationMap.getOutputSizes(currentUseCase.imageFormat).map { it.swap() }
}
}
}
}
private fun getOutputPath(isVideo: Boolean): String {
val baseName = if (isVideo) {"VID"} else {"IMG"}+'_'+dateFormat.format(Date())+'_'
var fileName: String
do {
fileName = baseName+(random.nextInt(fileNameRandomMax-fileNameRandomMin)+fileNameRandomMin)+'.'+ if (isVideo) {"mp4"} else {"jpg"}
} while (gocryptfsVolume.pathExists(fileName))
return PathUtils.pathJoin(outputDirectory, fileName)
}
private fun startTimerThen(action: () -> Unit) {
if (timerDuration > 0){
binding.textTimer.visibility = View.VISIBLE
isWaitingForTimer = true
lifecycleScope.launch {
for (i in timerDuration downTo 1){
binding.textTimer.text = i.toString()
delay(1000)
}
if (!isFinishing) {
action()
binding.textTimer.visibility = View.GONE
}
isWaitingForTimer = false
}
} else {
action()
}
}
private fun onClickTakePhoto() {
if (!isWaitingForTimer) {
val outputPath = getOutputPath(false)
startTimerThen {
imageCapture?.let { imageCapture ->
val outputBuff = ByteArrayOutputStream()
val outputOptions = ImageCapture.OutputFileOptions.Builder(outputBuff).build()
imageCapture.takePicture(outputOptions, executor, object : ImageCapture.OnImageSavedCallback {
override fun onImageSaved(outputFileResults: ImageCapture.OutputFileResults) {
binding.takePhotoButton.onPhotoTaken()
if (gocryptfsVolume.importFile(ByteArrayInputStream(outputBuff.toByteArray()), outputPath)) {
Toast.makeText(applicationContext, getString(R.string.picture_save_success, outputPath), Toast.LENGTH_SHORT).show()
} else {
CustomAlertDialogBuilder(this@CameraActivity, themeValue)
.setTitle(R.string.error)
.setMessage(R.string.picture_save_failed)
.setCancelable(false)
.setPositiveButton(R.string.ok) { _, _ ->
isFinishingIntentionally = true
finish()
}
.show()
}
}
override fun onError(exception: ImageCaptureException) {
binding.takePhotoButton.onPhotoTaken()
Toast.makeText(applicationContext, exception.message, Toast.LENGTH_SHORT).show()
}
})
}
}
}
}
@SuppressLint("MissingPermission")
private fun onClickRecordVideo() {
if (isRecording) {
videoCapture?.stopRecording()
isRecording = false
} else if (!isWaitingForTimer) {
val path = getOutputPath(true)
startTimerThen {
val handleId = gocryptfsVolume.openWriteMode(path)
videoCapture?.startRecording(VideoCapture.OutputFileOptions(object : SeekableWriter {
var offset = 0L
override fun write(byteArray: ByteArray) {
offset += gocryptfsVolume.writeFile(handleId, offset, byteArray, byteArray.size)
}
override fun seek(offset: Long) {
this.offset = offset
}
override fun close() {
gocryptfsVolume.closeFile(handleId)
}
}), executor, object : VideoCapture.OnVideoSavedCallback {
override fun onVideoSaved() {
Toast.makeText(applicationContext, getString(R.string.video_save_success, path), Toast.LENGTH_SHORT).show()
binding.recordVideoButton.setImageResource(R.drawable.record_video_button)
}
override fun onError(videoCaptureError: Int, message: String, cause: Throwable?) {
Toast.makeText(applicationContext, message, Toast.LENGTH_SHORT).show()
cause?.printStackTrace()
binding.recordVideoButton.setImageResource(R.drawable.record_video_button)
}
})
binding.recordVideoButton.setImageResource(R.drawable.stop_recording_video_button)
isRecording = true
}
}
}
override fun onDestroy() {
super.onDestroy()
if (!isFinishingIntentionally) {
gocryptfsVolume.close()
RestrictedFileProvider.wipeAll(this)
}
}
override fun onStop() {
super.onStop()
if (!isFinishing && !usf_keep_open){
finish()
}
}
override fun onPause() {
super.onPause()
sensorOrientationListener.remove(this)
if (!isAskingPermissions && !usf_keep_open) {
finish()
}
}
override fun onResume() {
super.onResume()
sensorOrientationListener.addListener(this)
}
override fun onBackPressed() {
super.onBackPressed()
isFinishingIntentionally = true
}
override fun onOrientationChange(newOrientation: Int) {
val realOrientation = when (newOrientation) {
Surface.ROTATION_0 -> 0f
Surface.ROTATION_90 -> 90f
Surface.ROTATION_180 -> 180f
else -> 270f
}
val rotateAnimation = RotateAnimation(previousOrientation, when {
realOrientation - previousOrientation > 180 -> realOrientation - 360
realOrientation - previousOrientation < -180 -> realOrientation + 360
else -> realOrientation
}, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f)
rotateAnimation.duration = 300
rotateAnimation.interpolator = LinearInterpolator()
rotateAnimation.fillAfter = true
orientedIcons.map { it.startAnimation(rotateAnimation) }
previousOrientation = realOrientation
imageCapture?.targetRotation = newOrientation
videoCapture?.setTargetRotation(newOrientation)
}
}
private fun Size.swap(): Size {
return Size(height, width)
}