FileOperationService

app/src/main/AndroidManifest.xml

@@ -86,6 +86,8 @@
             android:name=".file_viewers.TextEditor"
             android:configChanges="screenSize|orientation" />
 
+        <service android:name=".FileOperationService" android:exported="false"/>
+
         <provider
             android:name=".provider.RestrictedFileProvider"
             android:authorities="${applicationId}.temporary_provider"

app/src/main/java/sushi/hardcore/droidfs/FileOperationService.kt

@@ -0,0 +1,194 @@
+package sushi.hardcore.droidfs
+
+import android.app.Service
+import android.content.Intent
+import android.net.Uri
+import android.os.*
+import androidx.documentfile.provider.DocumentFile
+import sushi.hardcore.droidfs.explorers.ExplorerElement
+import sushi.hardcore.droidfs.file_operations.OperationFile
+import sushi.hardcore.droidfs.util.GocryptfsVolume
+import sushi.hardcore.droidfs.util.PathUtils
+import sushi.hardcore.droidfs.util.Wiper
+import java.io.File
+import java.io.FileNotFoundException
+
+class FileOperationService : Service() {
+
+    private val binder = LocalBinder()
+    private lateinit var gocryptfsVolume: GocryptfsVolume
+
+    inner class LocalBinder : Binder() {
+        fun getService(): FileOperationService = this@FileOperationService
+        fun setGocryptfsVolume(g: GocryptfsVolume) {
+            gocryptfsVolume = g
+        }
+    }
+
+    override fun onBind(p0: Intent?): IBinder {
+        return binder
+    }
+
+    private fun copyFile(srcPath: String, dstPath: String, remoteGocryptfsVolume: GocryptfsVolume = gocryptfsVolume): Boolean {
+        var success = true
+        val srcHandleId = remoteGocryptfsVolume.openReadMode(srcPath)
+        if (srcHandleId != -1){
+            val dstHandleId = gocryptfsVolume.openWriteMode(dstPath)
+            if (dstHandleId != -1){
+                var offset: Long = 0
+                val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
+                var length: Int
+                while (remoteGocryptfsVolume.readFile(srcHandleId, offset, ioBuffer).also { length = it } > 0) {
+                    val written = gocryptfsVolume.writeFile(dstHandleId, offset, ioBuffer, length).toLong()
+                    if (written == length.toLong()) {
+                        offset += written
+                    } else {
+                        success = false
+                        break
+                    }
+                }
+                gocryptfsVolume.closeFile(dstHandleId)
+            } else {
+                success = false
+            }
+            remoteGocryptfsVolume.closeFile(srcHandleId)
+        } else {
+            success = false
+        }
+        return success
+    }
+
+    fun copyElements(items: ArrayList<OperationFile>, remoteGocryptfsVolume: GocryptfsVolume = gocryptfsVolume, callback: (String?) -> Unit){
+        Thread {
+            var failedItem: String? = null
+            for (item in items){
+                if (item.explorerElement.isDirectory){
+                    if (!gocryptfsVolume.pathExists(item.dstPath!!)) {
+                        if (!gocryptfsVolume.mkdir(item.dstPath!!)) {
+                            failedItem = item.explorerElement.fullPath
+                        }
+                    }
+                } else {
+                    if (!copyFile(item.explorerElement.fullPath, item.dstPath!!, remoteGocryptfsVolume)){
+                        failedItem = item.explorerElement.fullPath
+                    }
+                }
+                if (failedItem != null){
+                    break
+                }
+            }
+            callback(failedItem)
+        }.start()
+    }
+
+    fun moveElements(items: ArrayList<OperationFile>, callback: (String?) -> Unit){
+        Thread {
+            val mergedFolders = ArrayList<String>()
+            var failedItem: String? = null
+            for (item in items){
+                if (item.explorerElement.isDirectory && gocryptfsVolume.pathExists(item.dstPath!!)){ //folder will be merged
+                    mergedFolders.add(item.explorerElement.fullPath)
+                } else {
+                    if (!gocryptfsVolume.rename(item.explorerElement.fullPath, item.dstPath!!)){
+                        failedItem = item.explorerElement.fullPath
+                        break
+                    }
+                }
+            }
+            if (failedItem == null){
+                for (path in mergedFolders) {
+                    if (!gocryptfsVolume.rmdir(path)){
+                        failedItem = path
+                        break
+                    }
+                }
+            }
+            callback(failedItem)
+        }.start()
+    }
+
+    fun importFilesFromUris(items: ArrayList<OperationFile>, uris: List<Uri>, callback: (String?) -> Unit){
+        Thread {
+            var failedIndex = -1
+            for (i in 0 until items.size) {
+                try {
+                    if (!gocryptfsVolume.importFile(this, uris[i], items[i].dstPath!!)){
+                        failedIndex = i
+                    }
+                } catch (e: FileNotFoundException){
+                    failedIndex = i
+                }
+                if (failedIndex != -1){
+                    callback(uris[failedIndex].toString())
+                    break
+                }
+            }
+            if (failedIndex == -1){
+                callback(null)
+            }
+        }.start()
+    }
+
+    fun wipeUris(uris: List<Uri>, callback: (String?) -> Unit){
+        Thread {
+            var errorMsg: String? = null
+            for (uri in uris) {
+                errorMsg = Wiper.wipe(this, uri)
+                if (errorMsg != null) {
+                    break
+                }
+            }
+            callback(errorMsg)
+        }.start()
+    }
+
+    private fun exportFileInto(srcPath: String, treeDocumentFile: DocumentFile): Boolean {
+        val outputStream = treeDocumentFile.createFile("*/*", File(srcPath).name)?.uri?.let {
+            contentResolver.openOutputStream(it)
+        }
+        return if (outputStream != null){
+            gocryptfsVolume.exportFile(srcPath, outputStream)
+        } else {
+            false
+        }
+    }
+
+    private fun recursiveExportDirectory(plain_directory_path: String, treeDocumentFile: DocumentFile): String? {
+        treeDocumentFile.createDirectory(File(plain_directory_path).name)?.let { childTree ->
+            val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
+            for (e in explorerElements) {
+                val fullPath = PathUtils.pathJoin(plain_directory_path, e.name)
+                if (e.isDirectory) {
+                    val failedItem = recursiveExportDirectory(fullPath, childTree)
+                    failedItem?.let { return it }
+                } else {
+                    if (!exportFileInto(fullPath, childTree)){
+                        return fullPath
+                    }
+                }
+            }
+            return null
+        }
+        return treeDocumentFile.name
+    }
+
+    fun exportFiles(uri: Uri, items: List<ExplorerElement>, callback: (String?) -> Unit){
+        Thread {
+            contentResolver.takePersistableUriPermission(uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+            DocumentFile.fromTreeUri(this, uri)?.let { treeDocumentFile ->
+                var failedItem: String? = null
+                for (element in items) {
+                    failedItem = if (element.isDirectory) {
+                        recursiveExportDirectory(element.fullPath, treeDocumentFile)
+                    } else {
+                        if (exportFileInto(element.fullPath, treeDocumentFile)) null else element.fullPath
+                    }
+                    if (failedItem != null) {
+                        break
+                    }
+                }
+                callback(failedItem)
+            }
+        }.start()
+    }
+}

app/src/main/java/sushi/hardcore/droidfs/explorers/BaseExplorerActivity.kt

@@ -1,12 +1,12 @@
 package sushi.hardcore.droidfs.explorers
 
-import android.content.DialogInterface
+import android.content.ComponentName
+import android.content.Context
 import android.content.Intent
+import android.content.ServiceConnection
 import android.net.Uri
 import android.os.Bundle
-import android.os.Handler
-import android.os.Looper
-import android.os.Message
+import android.os.IBinder
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
@@ -26,10 +26,12 @@ import sushi.hardcore.droidfs.ConstValues.Companion.isAudio
 import sushi.hardcore.droidfs.ConstValues.Companion.isImage
 import sushi.hardcore.droidfs.ConstValues.Companion.isText
 import sushi.hardcore.droidfs.ConstValues.Companion.isVideo
+import sushi.hardcore.droidfs.FileOperationService
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.adapters.DialogSingleChoiceAdapter
 import sushi.hardcore.droidfs.adapters.ExplorerElementAdapter
 import sushi.hardcore.droidfs.adapters.OpenAsDialogAdapter
+import sushi.hardcore.droidfs.file_operations.OperationFile
 import sushi.hardcore.droidfs.file_viewers.AudioPlayer
 import sushi.hardcore.droidfs.file_viewers.ImageViewer
 import sushi.hardcore.droidfs.file_viewers.TextEditor
@@ -37,11 +39,8 @@ import sushi.hardcore.droidfs.file_viewers.VideoPlayer
 import sushi.hardcore.droidfs.provider.RestrictedFileProvider
 import sushi.hardcore.droidfs.util.ExternalProvider
 import sushi.hardcore.droidfs.util.GocryptfsVolume
-import sushi.hardcore.droidfs.util.LoadingTask
 import sushi.hardcore.droidfs.util.PathUtils
 import sushi.hardcore.droidfs.widgets.ColoredAlertDialogBuilder
-import java.io.File
-import java.io.FileNotFoundException
 
 open class BaseExplorerActivity : BaseActivity() {
     private lateinit var sortOrderEntries: Array<String>
@@ -55,6 +54,7 @@ open class BaseExplorerActivity : BaseActivity() {
             field = value
             explorerViewModel.currentDirectoryPath = value
         }
+    protected lateinit var fileOperationService: FileOperationService
     protected lateinit var explorerElements: MutableList<ExplorerElement>
     protected lateinit var explorerAdapter: ExplorerElementAdapter
     private var isCreating = true
@@ -87,6 +87,7 @@ open class BaseExplorerActivity : BaseActivity() {
             setCurrentPath(currentDirectoryPath)
             refresher.isRefreshing = false
         }
+        bindFileOperationService()
     }
 
     class ExplorerViewModel: ViewModel() {
@@ -97,6 +98,21 @@ open class BaseExplorerActivity : BaseActivity() {
         setContentView(R.layout.activity_explorer_base)
     }
 
+    protected open fun bindFileOperationService(){
+        Intent(this, FileOperationService::class.java).also {
+            bindService(it, object : ServiceConnection {
+                override fun onServiceConnected(className: ComponentName, service: IBinder) {
+                    val binder = service as FileOperationService.LocalBinder
+                    fileOperationService = binder.getService()
+                    binder.setGocryptfsVolume(gocryptfsVolume)
+                }
+                override fun onServiceDisconnected(arg0: ComponentName) {
+
+                }
+            }, Context.BIND_AUTO_CREATE)
+        }
+    }
+
     private fun startFileViewer(cls: Class<*>, filePath: String, sortOrder: String = ""){
         val intent = Intent(this, cls)
         intent.putExtra("path", filePath)
@@ -274,97 +290,97 @@ open class BaseExplorerActivity : BaseActivity() {
         dialog.show()
     }
 
-    protected fun checkPathOverwrite(path: String, isDirectory: Boolean): String? {
-        var outputPath: String? = null
-        if (gocryptfsVolume.pathExists(path)){
-            val fileName = File(path).name
-            val handler = Handler{ msg ->
-                outputPath = msg.obj as String?
-                throw RuntimeException()
+    protected fun checkPathOverwrite(items: ArrayList<OperationFile>, dstDirectoryPath: String, callback: (ArrayList<OperationFile>?) -> Unit) {
+        val srcDirectoryPath = items[0].explorerElement.parentPath
+        var ready = true
+        for (i in 0 until items.size) {
+            val testDstPath: String
+            if (items[i].dstPath == null){
+                testDstPath = PathUtils.pathJoin(dstDirectoryPath, PathUtils.getRelativePath(srcDirectoryPath, items[i].explorerElement.fullPath))
+                if (gocryptfsVolume.pathExists(testDstPath)){
+                    ready = false
+                } else {
+                    items[i].dstPath = testDstPath
+                }
+            } else {
+                testDstPath = items[i].dstPath!!
+                if (gocryptfsVolume.pathExists(testDstPath) && !items[i].overwriteConfirmed){
+                    ready = false
+                }
             }
-            runOnUiThread {
-                val dialog = ColoredAlertDialogBuilder(this)
+            if (!ready){
+                ColoredAlertDialogBuilder(this)
                     .setTitle(R.string.warning)
-                    .setMessage(getString(if (isDirectory){R.string.dir_overwrite_question} else {R.string.file_overwrite_question}, path))
+                    .setMessage(getString(if (items[i].explorerElement.isDirectory){R.string.dir_overwrite_question} else {R.string.file_overwrite_question}, testDstPath))
+                    .setPositiveButton(R.string.yes) {_, _ ->
+                        items[i].dstPath = testDstPath
+                        items[i].overwriteConfirmed = true
+                        checkPathOverwrite(items, dstDirectoryPath, callback)
+                    }
                     .setNegativeButton(R.string.no) { _, _ ->
                         val dialogEditTextView = layoutInflater.inflate(R.layout.dialog_edit_text, null)
                         val dialogEditText = dialogEditTextView.findViewById<EditText>(R.id.dialog_edit_text)
-                        dialogEditText.setText(fileName)
+                        dialogEditText.setText(items[i].explorerElement.name)
                         dialogEditText.selectAll()
                         val dialog = ColoredAlertDialogBuilder(this)
-                            .setView(dialogEditTextView)
-                            .setTitle(R.string.enter_new_name)
-                            .setPositiveButton(R.string.ok) { _, _ ->
-                                handler.sendMessage(Message().apply { obj = checkPathOverwrite(PathUtils.pathJoin(PathUtils.getParentPath(path), dialogEditText.text.toString()), isDirectory) })
-                            }
-                            .setNegativeButton(R.string.cancel) { _, _ -> handler.sendMessage(Message().apply { obj = null }) }
-                            .create()
+                                .setView(dialogEditTextView)
+                                .setTitle(R.string.enter_new_name)
+                                .setPositiveButton(R.string.ok) { _, _ ->
+                                    items[i].dstPath = PathUtils.pathJoin(dstDirectoryPath, PathUtils.getRelativePath(srcDirectoryPath, items[i].explorerElement.parentPath), dialogEditText.text.toString())
+                                    checkPathOverwrite(items, dstDirectoryPath, callback)
+                                }
+                                .setOnCancelListener{
+                                    callback(null)
+                                }
+                                .create()
                         dialogEditText.setOnEditorActionListener { _, _, _ ->
                             dialog.dismiss()
-                            handler.sendMessage(Message().apply { obj = checkPathOverwrite(PathUtils.pathJoin(PathUtils.getParentPath(path), dialogEditText.text.toString()), isDirectory) })
+                            items[i].dstPath = PathUtils.pathJoin(dstDirectoryPath, PathUtils.getRelativePath(srcDirectoryPath, items[i].explorerElement.parentPath), dialogEditText.text.toString())
+                            checkPathOverwrite(items, dstDirectoryPath, callback)
                             true
                         }
-                        dialog.setOnCancelListener { handler.sendMessage(Message().apply { obj = null }) }
                         dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE)
                         dialog.show()
                     }
-                    .setPositiveButton(R.string.yes) { _, _ -> handler.sendMessage(Message().apply { obj = path }) }
-                    .create()
-                dialog.setOnCancelListener { handler.sendMessage(Message().apply { obj = null }) }
-                dialog.show()
+                    .setOnCancelListener{
+                        callback(null)
+                    }
+                    .show()
+                break
             }
-            try { Looper.loop() }
-            catch (e: RuntimeException) {}
-        } else {
-            outputPath = path
         }
-        return outputPath
+        if (ready){
+            callback(items)
+        }
     }
 
-    protected fun importFilesFromUris(uris: List<Uri>, task: LoadingTask, callback: (DialogInterface.OnClickListener)? = null): Boolean {
-        var success = false
+    protected fun importFilesFromUris(uris: List<Uri>, callback: (String?) -> Unit) {
+        val items = ArrayList<OperationFile>()
         for (uri in uris) {
-            val fileName = PathUtils.getFilenameFromURI(task.activity, uri)
-            if (fileName == null){
-                task.stopTask {
-                    ColoredAlertDialogBuilder(task.activity)
+            val fileName = PathUtils.getFilenameFromURI(this, uri)
+            if (fileName == null) {
+                ColoredAlertDialogBuilder(this)
                         .setTitle(R.string.error)
                         .setMessage(getString(R.string.error_retrieving_filename, uri))
                         .setPositiveButton(R.string.ok, null)
                         .show()
-                }
-                success = false
+                items.clear()
                 break
             } else {
-                val dstPath = checkPathOverwrite(PathUtils.pathJoin(currentDirectoryPath, fileName), false)
-                if (dstPath == null){
-                    break
-                } else {
-                    var message: String? = null
-                    try {
-                        success = gocryptfsVolume.importFile(task.activity, uri, dstPath)
-                    } catch (e: FileNotFoundException){
-                        message = if (e.message != null){
-                            e.message!!+"\n"
-                        } else {
-                            ""
-                        }
-                    }
-                    if (!success || message != null) {
-                        task.stopTask {
-                            ColoredAlertDialogBuilder(task.activity)
-                                .setTitle(R.string.error)
-                                .setMessage((message ?: "")+getString(R.string.import_failed, uri))
-                                .setCancelable(callback == null)
-                                .setPositiveButton(R.string.ok, callback)
-                                .show()
+                items.add(OperationFile.fromExplorerElement(ExplorerElement(fileName, 1, -1, -1, currentDirectoryPath)))
+            }
+        }
+        if (items.size > 0) {
+            checkPathOverwrite(items, currentDirectoryPath) { checkedItems ->
+                checkedItems?.let {
+                    fileOperationService.importFilesFromUris(checkedItems, uris){ failedItem ->
+                        runOnUiThread {
+                            callback(failedItem)
                         }
-                        break
                     }
                 }
             }
         }
-        return success
     }
 
     protected fun rename(old_name: String, new_name: String){

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivity.kt

@@ -3,20 +3,20 @@ package sushi.hardcore.droidfs.explorers
 import android.app.Activity
 import android.content.Intent
 import android.net.Uri
-import android.os.Looper
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.WindowManager
 import android.widget.EditText
 import android.widget.Toast
-import androidx.appcompat.app.AppCompatActivity
-import androidx.documentfile.provider.DocumentFile
 import sushi.hardcore.droidfs.CameraActivity
 import sushi.hardcore.droidfs.OpenActivity
 import sushi.hardcore.droidfs.R
 import sushi.hardcore.droidfs.adapters.IconTextDialogAdapter
-import sushi.hardcore.droidfs.util.*
+import sushi.hardcore.droidfs.file_operations.OperationFile
+import sushi.hardcore.droidfs.util.ExternalProvider
+import sushi.hardcore.droidfs.util.GocryptfsVolume
+import sushi.hardcore.droidfs.util.PathUtils
 import sushi.hardcore.droidfs.widgets.ColoredAlertDialogBuilder
 import java.io.File
 
@@ -30,7 +30,7 @@ class ExplorerActivity : BaseExplorerActivity() {
     private var usf_decrypt = false
     private var usf_share = false
     private var currentItemAction = ItemsActions.NONE
-    private val itemsToProcess = ArrayList<ExplorerElement>()
+    private val itemsToProcess = ArrayList<OperationFile>()
     override fun init() {
         setContentView(R.layout.activity_explorer)
         usf_decrypt = sharedPrefs.getBoolean("usf_decrypt", false)
@@ -47,19 +47,17 @@ class ExplorerActivity : BaseExplorerActivity() {
         if (fileName.isEmpty()) {
             Toast.makeText(this, R.string.error_filename_empty, Toast.LENGTH_SHORT).show()
         } else {
-            checkPathOverwrite(PathUtils.pathJoin(currentDirectoryPath, fileName), false)?.let {
-                val handleID = gocryptfsVolume.openWriteMode(it)
-                if (handleID == -1) {
-                    ColoredAlertDialogBuilder(this)
+            val handleID = gocryptfsVolume.openWriteMode(fileName) //don't check overwrite because openWriteMode open in read-write (doesn't erase content)
+            if (handleID == -1) {
+                ColoredAlertDialogBuilder(this)
                         .setTitle(R.string.error)
                         .setMessage(R.string.file_creation_failed)
                         .setPositiveButton(R.string.ok, null)
                         .show()
-                } else {
-                    gocryptfsVolume.closeFile(handleID)
-                    setCurrentPath(currentDirectoryPath)
-                    invalidateOptionsMenu()
-                }
+            } else {
+                gocryptfsVolume.closeFile(handleID)
+                setCurrentPath(currentDirectoryPath)
+                invalidateOptionsMenu()
             }
         }
     }
@@ -138,162 +136,137 @@ class ExplorerActivity : BaseExplorerActivity() {
         super.onActivityResult(requestCode, resultCode, data)
         if (requestCode == PICK_FILES_REQUEST_CODE) {
             if (resultCode == Activity.RESULT_OK && data != null) {
-                object : LoadingTask(this, R.string.loading_msg_import){
-                    override fun doTask(activity: AppCompatActivity) {
-                        val uris: MutableList<Uri> = ArrayList()
-                        val singleUri = data.data
-                        if (singleUri == null) { //multiples choices
-                            val clipData = data.clipData
-                            if (clipData != null){
-                                for (i in 0 until clipData.itemCount) {
-                                    uris.add(clipData.getItemAt(i).uri)
-                                }
-                            }
-                        } else {
-                            uris.add(singleUri)
+                val uris: MutableList<Uri> = ArrayList()
+                val singleUri = data.data
+                if (singleUri == null) { //multiples choices
+                    val clipData = data.clipData
+                    if (clipData != null){
+                        for (i in 0 until clipData.itemCount) {
+                            uris.add(clipData.getItemAt(i).uri)
                         }
-                        Looper.prepare()
-                        if (importFilesFromUris(uris, this)) {
-                            stopTask {
-                                ColoredAlertDialogBuilder(activity)
-                                    .setTitle(R.string.success_import)
-                                    .setMessage("""
+                    }
+                } else {
+                    uris.add(singleUri)
+                }
+                importFilesFromUris(uris){ failedItem ->
+                    if (failedItem == null){
+                        ColoredAlertDialogBuilder(this)
+                                .setTitle(R.string.success_import)
+                                .setMessage("""
                                 ${getString(R.string.success_import_msg)}
                                 ${getString(R.string.ask_for_wipe)}
                                 """.trimIndent())
-                                    .setPositiveButton(R.string.yes) { _, _ ->
-                                        object : LoadingTask(activity, R.string.loading_msg_wipe){
-                                            override fun doTask(activity: AppCompatActivity) {
-                                                var success = true
-                                                for (uri in uris) {
-                                                    val errorMsg = Wiper.wipe(activity, uri)
-                                                    if (errorMsg != null) {
-                                                        stopTask {
-                                                            ColoredAlertDialogBuilder(activity)
-                                                                .setTitle(R.string.error)
-                                                                .setMessage(getString(R.string.wipe_failed, errorMsg))
-                                                                .setPositiveButton(R.string.ok, null)
-                                                                .show()
-                                                        }
-                                                        success = false
-                                                        break
-                                                    }
-                                                }
-                                                if (success) {
-                                                    stopTask {
-                                                        ColoredAlertDialogBuilder(activity)
-                                                            .setTitle(R.string.wipe_successful)
-                                                            .setMessage(R.string.wipe_success_msg)
-                                                            .setPositiveButton(R.string.ok, null)
-                                                            .show()
-                                                    }
-                                                }
+                                .setPositiveButton(R.string.yes) { _, _ ->
+                                    fileOperationService.wipeUris(uris) { errorMsg ->
+                                        runOnUiThread {
+                                            if (errorMsg == null){
+                                                ColoredAlertDialogBuilder(this)
+                                                        .setTitle(R.string.wipe_successful)
+                                                        .setMessage(R.string.wipe_success_msg)
+                                                        .setPositiveButton(R.string.ok, null)
+                                                        .show()
+                                            } else {
+                                                ColoredAlertDialogBuilder(this)
+                                                        .setTitle(R.string.error)
+                                                        .setMessage(getString(R.string.wipe_failed, errorMsg))
+                                                        .setPositiveButton(R.string.ok, null)
+                                                        .show()
                                             }
                                         }
+
                                     }
-                                    .setNegativeButton(R.string.no, null)
-                                    .show()
-                            }
-                        }
-                    }
-                    override fun doFinally(activity: AppCompatActivity){
-                        setCurrentPath(currentDirectoryPath)
+                                }
+                                .setNegativeButton(R.string.no, null)
+                                .show()
+                    } else {
+                        ColoredAlertDialogBuilder(this)
+                                .setTitle(R.string.error)
+                                .setMessage(getString(R.string.import_failed, failedItem))
+                                .setPositiveButton(R.string.ok, null)
+                                .show()
                     }
                 }
             }
         } else if (requestCode == PICK_DIRECTORY_REQUEST_CODE) {
             if (resultCode == Activity.RESULT_OK && data != null) {
-                object : LoadingTask(this, R.string.loading_msg_export){
-                    override fun doTask(activity: AppCompatActivity) {
-                        data.data?.let {uri ->
-                            contentResolver.takePersistableUriPermission(uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
-                            DocumentFile.fromTreeUri(activity, uri)?.let { treeDocumentFile ->
-                                var failedItem: String? = null
-                                for (i in explorerAdapter.selectedItems) {
-                                    val element = explorerAdapter.getItem(i)
-                                    val fullPath = PathUtils.pathJoin(currentDirectoryPath, element.name)
-                                    failedItem = if (element.isDirectory) {
-                                        recursiveExportDirectory(fullPath, treeDocumentFile)
-                                    } else {
-                                        if (exportFileInto(fullPath, treeDocumentFile)) null else fullPath
-                                    }
-                                    if (failedItem != null) {
-                                        stopTask {
-                                            ColoredAlertDialogBuilder(activity)
-                                                .setTitle(R.string.error)
-                                                .setMessage(getString(R.string.export_failed, failedItem))
-                                                .setPositiveButton(R.string.ok, null)
-                                                .show()
-                                        }
-                                        break
-                                    }
-                                }
-                                if (failedItem == null) {
-                                    stopTask {
-                                        ColoredAlertDialogBuilder(activity)
-                                            .setTitle(R.string.success_export)
-                                            .setMessage(R.string.success_export_msg)
-                                            .setPositiveButton(R.string.ok, null)
-                                            .show()
-                                    }
-                                }
+                data.data?.let { uri ->
+                    fileOperationService.exportFiles(uri, explorerAdapter.selectedItems.map { i -> explorerElements[i] }){ failedItem ->
+                        runOnUiThread {
+                            if (failedItem == null){
+                                ColoredAlertDialogBuilder(this)
+                                        .setTitle(R.string.success_export)
+                                        .setMessage(R.string.success_export_msg)
+                                        .setPositiveButton(R.string.ok, null)
+                                        .show()
+                            } else {
+                                ColoredAlertDialogBuilder(this)
+                                        .setTitle(R.string.error)
+                                        .setMessage(getString(R.string.export_failed, failedItem))
+                                        .setPositiveButton(R.string.ok, null)
+                                        .show()
                             }
                         }
                     }
-                    override fun doFinally(activity: AppCompatActivity) {
-                        unselectAll()
-                    }
+                    unselectAll()
                 }
             }
         } else if (requestCode == PICK_OTHER_VOLUME_ITEMS_REQUEST_CODE) {
             if (resultCode == Activity.RESULT_OK && data != null) {
-                object : LoadingTask(this, R.string.loading_msg_import){
-                    override fun doTask(activity: AppCompatActivity) {
-                        val remoteSessionID = data.getIntExtra("sessionID", -1)
-                        val remoteGocryptfsVolume = GocryptfsVolume(remoteSessionID)
-                        val path = data.getStringExtra("path")
-                        var failedItem: String? = null
-                        Looper.prepare()
-                        if (path == null) {
-                            val paths = data.getStringArrayListExtra("paths")
-                            val types = data.getIntegerArrayListExtra("types")
-                            if (types != null && paths != null){
-                                for (i in paths.indices) {
-                                    failedItem = if (types[i] == 0) { //directory
-                                        recursiveImportDirectoryFromOtherVolume(remoteGocryptfsVolume, paths[i], currentDirectoryPath)
-                                    } else {
-                                        safeImportFileFromOtherVolume(remoteGocryptfsVolume, paths[i], PathUtils.pathJoin(currentDirectoryPath, File(paths[i]).name))
-                                    }
-                                    if (failedItem != null) {
-                                        break
-                                    }
+                val remoteSessionID = data.getIntExtra("sessionID", -1)
+                val remoteGocryptfsVolume = GocryptfsVolume(remoteSessionID)
+                val path = data.getStringExtra("path")
+                val operationFiles = ArrayList<OperationFile>()
+                if (path == null){ //multiples elements
+                    val paths = data.getStringArrayListExtra("paths")
+                    val types = data.getIntegerArrayListExtra("types")
+                    if (types != null && paths != null){
+                        for (i in paths.indices) {
+                            operationFiles.add(
+                                    OperationFile.fromExplorerElement(
+                                            ExplorerElement(File(paths[i]).name, types[i].toShort(), -1, -1, PathUtils.getParentPath(paths[i]))
+                                    )
+                            )
+                            if (types[i] == 0){ //directory
+                                remoteGocryptfsVolume.recursiveMapFiles(paths[i]).forEach {
+                                    operationFiles.add(OperationFile.fromExplorerElement(it))
                                 }
                             }
-                        } else {
-                            failedItem = safeImportFileFromOtherVolume(remoteGocryptfsVolume, path, PathUtils.pathJoin(currentDirectoryPath, File(path).name))
                         }
-                        if (failedItem == null) {
-                            stopTask {
-                                ColoredAlertDialogBuilder(activity)
-                                    .setTitle(R.string.success_import)
-                                    .setMessage(R.string.success_import_msg)
-                                    .setPositiveButton(R.string.ok, null)
-                                    .show()
-                            }
-                        } else if (failedItem!!.isNotEmpty()){
-                            stopTask {
-                                ColoredAlertDialogBuilder(activity)
-                                    .setTitle(R.string.error)
-                                    .setMessage(getString(R.string.import_failed, failedItem))
-                                    .setPositiveButton(R.string.ok, null)
-                                    .show()
+                    }
+                } else {
+                    operationFiles.add(
+                            OperationFile.fromExplorerElement(
+                                    ExplorerElement(File(path).name, 1, -1, -1, PathUtils.getParentPath(path))
+                            )
+                    )
+                }
+                if (operationFiles.size > 0){
+                    checkPathOverwrite(operationFiles, currentDirectoryPath) { items ->
+                        if (items == null) {
+                            remoteGocryptfsVolume.close()
+                        } else {
+                            fileOperationService.copyElements(items, remoteGocryptfsVolume){ failedItem ->
+                                runOnUiThread {
+                                    if (failedItem == null){
+                                        ColoredAlertDialogBuilder(this)
+                                                .setTitle(R.string.success_import)
+                                                .setMessage(R.string.success_import_msg)
+                                                .setPositiveButton(R.string.ok, null)
+                                                .show()
+                                    } else {
+                                        ColoredAlertDialogBuilder(this)
+                                                .setTitle(R.string.error)
+                                                .setMessage(getString(R.string.import_failed, failedItem))
+                                                .setPositiveButton(R.string.ok, null)
+                                                .show()
+                                    }
+                                }
+                                remoteGocryptfsVolume.close()
                             }
                         }
-                        remoteGocryptfsVolume.close()
-                    }
-                    override fun doFinally(activity: AppCompatActivity) {
-                        setCurrentPath(currentDirectoryPath)
                     }
+                } else {
+                    remoteGocryptfsVolume.close()
                 }
             }
         }
@@ -344,7 +317,7 @@ class ExplorerActivity : BaseExplorerActivity() {
             }
             R.id.cut -> {
                 for (i in explorerAdapter.selectedItems){
-                    itemsToProcess.add(explorerElements[i])
+                    itemsToProcess.add(OperationFile.fromExplorerElement(explorerElements[i]))
                 }
                 currentItemAction = ItemsActions.MOVE
                 unselectAll()
@@ -352,7 +325,12 @@ class ExplorerActivity : BaseExplorerActivity() {
             }
             R.id.copy -> {
                 for (i in explorerAdapter.selectedItems){
-                    itemsToProcess.add(explorerElements[i])
+                    itemsToProcess.add(OperationFile.fromExplorerElement(explorerElements[i]))
+                    if (explorerElements[i].isDirectory){
+                        gocryptfsVolume.recursiveMapFiles(explorerElements[i].fullPath).forEach {
+                            itemsToProcess.add(OperationFile.fromExplorerElement(it))
+                        }
+                    }
                 }
                 currentItemAction = ItemsActions.COPY
                 unselectAll()
@@ -360,81 +338,45 @@ class ExplorerActivity : BaseExplorerActivity() {
             }
             R.id.validate -> {
                 if (currentItemAction == ItemsActions.COPY){
-                    object : LoadingTask(this, R.string.loading_msg_copy){
-                        override fun doTask(activity: AppCompatActivity) {
-                            var failedItem: String? = null
-                            Looper.prepare()
-                            for (element in itemsToProcess) {
-                                val dstPath = checkPathOverwrite(PathUtils.pathJoin(currentDirectoryPath, element.name), element.isDirectory)
-                                failedItem = if (dstPath == null){
-                                    ""
-                                } else {
-                                    if (element.isDirectory) {
-                                        recursiveCopyDirectory(element.fullPath, dstPath)
-                                    } else {
-                                        if (copyFile(element.fullPath, dstPath)) null else element.fullPath
-                                    }
-                                }
-                                if (failedItem != null){
-                                    if (failedItem.isNotEmpty()) {
-                                        stopTask {
-                                            ColoredAlertDialogBuilder(activity)
+                    checkPathOverwrite(itemsToProcess, currentDirectoryPath){ items ->
+                        items?.let {
+                            fileOperationService.copyElements(it.toMutableList() as ArrayList<OperationFile>){ failedItem ->
+                                runOnUiThread {
+                                    if (failedItem != null){
+                                        ColoredAlertDialogBuilder(this)
                                                 .setTitle(R.string.error)
-                                                .setMessage(getString(
-                                                        R.string.copy_failed,
-                                                        failedItem
-                                                    ))
+                                                .setMessage(getString(R.string.copy_failed, failedItem))
                                                 .setPositiveButton(R.string.ok, null)
                                                 .show()
-                                        }
+                                    } else {
+                                        Toast.makeText(this, R.string.copy_success, Toast.LENGTH_SHORT).show()
                                     }
-                                    break
-                                }
-                            }
-                            if (failedItem == null) {
-                                stopTask {
-                                    ColoredAlertDialogBuilder(activity)
-                                        .setTitle(getString(R.string.copy_success))
-                                        .setMessage(getString(R.string.copy_success_msg))
-                                        .setPositiveButton(R.string.ok, null)
-                                        .show()
                                 }
                             }
                         }
-                        override fun doFinally(activity: AppCompatActivity) {
-                            cancelItemAction()
-                            unselectAll()
-                            setCurrentPath(currentDirectoryPath)
-                        }
+                        cancelItemAction()
+                        unselectAll()
                     }
                 } else if (currentItemAction == ItemsActions.MOVE){
-                    object : LoadingTask(this, R.string.loading_msg_move){
-                        override fun doTask(activity: AppCompatActivity) {
-                            Looper.prepare()
-                            val failedItem = moveElements(itemsToProcess, currentDirectoryPath)
-                            if (failedItem == null) {
-                                stopTask {
-                                    ColoredAlertDialogBuilder(activity)
-                                        .setTitle(getString(R.string.move_success))
-                                        .setMessage(getString(R.string.move_success_msg))
-                                        .setPositiveButton(R.string.ok, null)
-                                        .show()
-                                }
-                            } else if (failedItem.isNotEmpty()){
-                                stopTask {
-                                    ColoredAlertDialogBuilder(activity)
-                                        .setTitle(R.string.error)
-                                        .setMessage(getString(R.string.move_failed, failedItem))
-                                        .setPositiveButton(R.string.ok, null)
-                                        .show()
+                    mapFileForMove(itemsToProcess, itemsToProcess[0].explorerElement.parentPath)
+                    checkPathOverwrite(itemsToProcess, currentDirectoryPath){ items ->
+                        items?.let {
+                            fileOperationService.moveElements(it.toMutableList() as ArrayList<OperationFile>){ failedItem ->
+                                runOnUiThread {
+                                    if (failedItem != null){
+                                        ColoredAlertDialogBuilder(this)
+                                                .setTitle(R.string.error)
+                                                .setMessage(getString(R.string.move_failed, failedItem))
+                                                .setPositiveButton(R.string.ok, null)
+                                                .show()
+                                    } else {
+                                        Toast.makeText(this, R.string.move_success, Toast.LENGTH_SHORT).show()
+                                    }
                                 }
                             }
                         }
-                        override fun doFinally(activity: AppCompatActivity) {
-                            cancelItemAction()
-                            unselectAll()
-                            setCurrentPath(currentDirectoryPath)
-                        }
+                        cancelItemAction()
+                        unselectAll()
                     }
                 }
                 true
@@ -473,6 +415,24 @@ class ExplorerActivity : BaseExplorerActivity() {
         }
     }
 
+    private fun mapFileForMove(items: ArrayList<OperationFile>, srcDirectoryPath: String): ArrayList<OperationFile> {
+        val newItems = ArrayList<OperationFile>()
+        items.forEach {
+            if (it.explorerElement.isDirectory){
+                if (gocryptfsVolume.pathExists(PathUtils.pathJoin(currentDirectoryPath, PathUtils.getRelativePath(srcDirectoryPath, it.explorerElement.fullPath)))){
+                    newItems.addAll(
+                        mapFileForMove(
+                            gocryptfsVolume.listDir(it.explorerElement.fullPath).map { e -> OperationFile.fromExplorerElement(e) } as ArrayList<OperationFile>,
+                            srcDirectoryPath
+                        )
+                    )
+                }
+            }
+        }
+        items.addAll(newItems)
+        return items
+    }
+
     private fun cancelItemAction() {
         if (currentItemAction != ItemsActions.NONE){
             currentItemAction = ItemsActions.NONE
@@ -489,220 +449,13 @@ class ExplorerActivity : BaseExplorerActivity() {
         }
     }
 
-    private fun copyFile(srcPath: String, dstPath: String): Boolean {
-        var success = true
-        val originalHandleId = gocryptfsVolume.openReadMode(srcPath)
-        if (originalHandleId != -1){
-            val newHandleId = gocryptfsVolume.openWriteMode(dstPath)
-            if (newHandleId != -1){
-                var offset: Long = 0
-                val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
-                var length: Int
-                while (gocryptfsVolume.readFile(originalHandleId, offset, ioBuffer).also { length = it } > 0) {
-                    val written = gocryptfsVolume.writeFile(newHandleId, offset, ioBuffer, length).toLong()
-                    if (written == length.toLong()) {
-                        offset += written
-                    } else {
-                        success = false
-                        break
-                    }
-                }
-                gocryptfsVolume.closeFile(newHandleId)
-            } else {
-                success = false
-            }
-            gocryptfsVolume.closeFile(originalHandleId)
-        } else {
-            success = false
-        }
-        return success
-    }
-
-    private fun recursiveCopyDirectory(srcDirectoryPath: String, dstDirectoryPath: String): String? {
-        val mappedElements = gocryptfsVolume.recursiveMapFiles(srcDirectoryPath)
-        if (!gocryptfsVolume.pathExists(dstDirectoryPath)){
-            if (!gocryptfsVolume.mkdir(dstDirectoryPath)) {
-                return srcDirectoryPath
-            }
-        }
-        for (e in mappedElements) {
-            val dstPath = checkPathOverwrite(PathUtils.pathJoin(dstDirectoryPath, PathUtils.getRelativePath(srcDirectoryPath, e.fullPath)), e.isDirectory)
-            if (dstPath == null){
-                return ""
-            } else {
-                if (e.isDirectory) {
-                    if (!gocryptfsVolume.pathExists(dstPath)){
-                        if (!gocryptfsVolume.mkdir(dstPath)){
-                            return e.fullPath
-                        }
-                    }
-                } else {
-                    if (!copyFile(e.fullPath, dstPath)) {
-                        return e.fullPath
-                    }
-                }
-            }
-        }
-        return null
-    }
-
-    private fun moveDirectory(srcDirectoryPath: String, dstDirectoryPath: String): String? {
-        if (!gocryptfsVolume.pathExists(dstDirectoryPath)) {
-            if (!gocryptfsVolume.rename(srcDirectoryPath, dstDirectoryPath)) {
-                return srcDirectoryPath
-            }
-        } else {
-            moveElements(gocryptfsVolume.listDir(srcDirectoryPath), dstDirectoryPath)
-            gocryptfsVolume.rmdir(srcDirectoryPath)
-        }
-        return null
-    }
-
-    private fun moveElements(elements: List<ExplorerElement>, dstDirectoryPath: String): String? {
-        for (element in elements){
-            val dstPath = checkPathOverwrite(PathUtils.pathJoin(dstDirectoryPath, element.name), element.isDirectory)
-            if (dstPath == null){
-                return ""
-            } else {
-                if (element.isDirectory){
-                    moveDirectory(element.fullPath, dstPath)?.let{
-                        return it
-                    }
-                } else {
-                    if (!gocryptfsVolume.rename(element.fullPath, dstPath)){
-                        return element.fullPath
-                    }
-                }
-            }
-        }
-        return null
-    }
-
-    private fun importFileFromOtherVolume(remoteGocryptfsVolume: GocryptfsVolume, srcPath: String, dstPath: String): Boolean {
-        var success = true
-        val srcHandleID = remoteGocryptfsVolume.openReadMode(srcPath)
-        if (srcHandleID != -1) {
-            val dstHandleID = gocryptfsVolume.openWriteMode(dstPath)
-            if (dstHandleID != -1) {
-                var length: Int
-                val ioBuffer = ByteArray(GocryptfsVolume.DefaultBS)
-                var offset: Long = 0
-                while (remoteGocryptfsVolume.readFile(srcHandleID, offset, ioBuffer).also { length = it } > 0) {
-                    val written =
-                        gocryptfsVolume.writeFile(dstHandleID, offset, ioBuffer, length).toLong()
-                    if (written == length.toLong()) {
-                        offset += length.toLong()
-                    } else {
-                        success = false
-                        break
-                    }
-                }
-                gocryptfsVolume.closeFile(dstHandleID)
-            }
-            remoteGocryptfsVolume.closeFile(srcHandleID)
-        }
-        return success
-    }
-
-    private fun safeImportFileFromOtherVolume(remoteGocryptfsVolume: GocryptfsVolume, srcPath: String, dstPath: String): String? {
-        val checkedDstPath = checkPathOverwrite(dstPath, false)
-        return if (checkedDstPath == null){
-            ""
-        } else {
-            if (importFileFromOtherVolume(remoteGocryptfsVolume, srcPath, checkedDstPath)) null else srcPath
-        }
-    }
-
-    private fun recursiveImportDirectoryFromOtherVolume(remote_gocryptfsVolume: GocryptfsVolume, remote_directory_path: String, outputPath: String): String? {
-        val mappedElements = remote_gocryptfsVolume.recursiveMapFiles(remote_directory_path)
-        val dstDirectoryPath = checkPathOverwrite(PathUtils.pathJoin(outputPath, File(remote_directory_path).name), true)
-        if (dstDirectoryPath == null){
-            return ""
-        } else {
-            if (!gocryptfsVolume.pathExists(dstDirectoryPath)) {
-                if (!gocryptfsVolume.mkdir(dstDirectoryPath)) {
-                    return remote_directory_path
-                }
-            }
-            for (e in mappedElements) {
-                val dstPath = checkPathOverwrite(PathUtils.pathJoin(dstDirectoryPath, PathUtils.getRelativePath(remote_directory_path, e.fullPath)), e.isDirectory)
-                if (dstPath == null){
-                    return ""
-                } else {
-                    if (e.isDirectory) {
-                        if (!gocryptfsVolume.pathExists(dstPath)){
-                            if (!gocryptfsVolume.mkdir(dstPath)){
-                                return e.fullPath
-                            }
-                        }
-                    } else {
-                        if (!importFileFromOtherVolume(remote_gocryptfsVolume, e.fullPath, dstPath)) {
-                            return e.fullPath
-                        }
-                    }
-                }
-            }
-        }
-        return null
-    }
-
-    private fun exportFileInto(srcPath: String, treeDocumentFile: DocumentFile): Boolean {
-        val outputStream = treeDocumentFile.createFile("*/*", File(srcPath).name)?.uri?.let {
-            contentResolver.openOutputStream(it)
-        }
-        return if (outputStream != null){
-            gocryptfsVolume.exportFile(srcPath, outputStream)
-        } else {
-            false
-        }
-    }
-
-    private fun recursiveExportDirectory(plain_directory_path: String, treeDocumentFile: DocumentFile): String? {
-        treeDocumentFile.createDirectory(File(plain_directory_path).name)?.let {childTree ->
-            val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
-            for (e in explorerElements) {
-                val fullPath = PathUtils.pathJoin(plain_directory_path, e.name)
-                if (e.isDirectory) {
-                    val failedItem = recursiveExportDirectory(fullPath, childTree)
-                    failedItem?.let { return it }
-                } else {
-                    if (!exportFileInto(fullPath, childTree)){
-                        return fullPath
-                    }
-                }
-            }
-            return null
-        }
-        return treeDocumentFile.name
-    }
-
-    private fun recursiveRemoveDirectory(plain_directory_path: String): String? {
-        val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
-        for (e in explorerElements) {
-            val fullPath = PathUtils.pathJoin(plain_directory_path, e.name)
-            if (e.isDirectory) {
-                val result = recursiveRemoveDirectory(fullPath)
-                result?.let { return it }
-            } else {
-                if (!gocryptfsVolume.removeFile(fullPath)) {
-                    return fullPath
-                }
-            }
-        }
-        return if (!gocryptfsVolume.rmdir(plain_directory_path)) {
-            plain_directory_path
-        } else {
-            null
-        }
-    }
-
     private fun removeSelectedItems() {
         var failedItem: String? = null
         for (i in explorerAdapter.selectedItems) {
             val element = explorerAdapter.getItem(i)
             val fullPath = PathUtils.pathJoin(currentDirectoryPath, element.name)
             if (element.isDirectory) {
-                val result = recursiveRemoveDirectory(fullPath)
+                val result = gocryptfsVolume.recursiveRemoveDirectory(fullPath)
                 result?.let{ failedItem = it }
             } else {
                 if (!gocryptfsVolume.removeFile(fullPath)) {

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivityDrop.kt

@@ -1,15 +1,11 @@
 package sushi.hardcore.droidfs.explorers
 
-import android.content.DialogInterface
 import android.content.Intent
 import android.net.Uri
-import android.os.Looper
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
-import androidx.appcompat.app.AppCompatActivity
 import sushi.hardcore.droidfs.R
-import sushi.hardcore.droidfs.util.LoadingTask
 import sushi.hardcore.droidfs.widgets.ColoredAlertDialogBuilder
 
 class ExplorerActivityDrop : BaseExplorerActivity() {
@@ -31,54 +27,61 @@ class ExplorerActivityDrop : BaseExplorerActivity() {
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
             R.id.validate -> {
-                object : LoadingTask(this, R.string.loading_msg_import) {
-                    override fun doTask(activity: AppCompatActivity) {
-                        val alertDialog = ColoredAlertDialogBuilder(activity)
-                        alertDialog.setCancelable(false)
-                        alertDialog.setPositiveButton(R.string.ok) { _, _ -> finish() }
-                        val errorMsg: String?
-                        val extras = intent.extras
-                        if (extras != null && extras.containsKey(Intent.EXTRA_STREAM)){
-                            Looper.prepare()
-                            when (intent.action) {
-                                Intent.ACTION_SEND -> {
-                                    val uri = intent.getParcelableExtra<Uri>(Intent.EXTRA_STREAM)
-                                    errorMsg = if (uri == null){
-                                        getString(R.string.share_intent_parsing_failed)
-                                    } else {
-                                        if (importFilesFromUris(listOf(uri), this){ _, _ -> finish() }) null else ""
-                                    }
-                                }
-                                Intent.ACTION_SEND_MULTIPLE -> {
-                                    val uris = intent.getParcelableArrayListExtra<Uri>(Intent.EXTRA_STREAM)
-                                    errorMsg = if (uris != null){
-                                        if (importFilesFromUris(uris, this){ _, _ -> finish() }) null else ""
-                                    } else {
-                                        getString(R.string.share_intent_parsing_failed)
-                                    }
-                                }
-                                else -> {
-                                    errorMsg = getString(R.string.share_intent_parsing_failed)
-                                }
+                val extras = intent.extras
+                val errorMsg: String? = if (extras != null && extras.containsKey(Intent.EXTRA_STREAM)) {
+                    when (intent.action) {
+                        Intent.ACTION_SEND -> {
+                            val uri = intent.getParcelableExtra<Uri>(Intent.EXTRA_STREAM)
+                            if (uri == null) {
+                                getString(R.string.share_intent_parsing_failed)
+                            } else {
+                                importFilesFromUris(listOf(uri), ::onImported)
+                                null
                             }
-                        } else {
-                            errorMsg = getString(R.string.share_intent_parsing_failed)
                         }
-                        if (errorMsg == null || errorMsg.isNotEmpty()){
-                            if (errorMsg == null) {
-                                alertDialog.setTitle(R.string.success_import)
-                                alertDialog.setMessage(R.string.success_import_msg)
-                            } else if (errorMsg.isNotEmpty()) {
-                                alertDialog.setTitle(R.string.error)
-                                alertDialog.setMessage(errorMsg)
+                        Intent.ACTION_SEND_MULTIPLE -> {
+                            val uris = intent.getParcelableArrayListExtra<Uri>(Intent.EXTRA_STREAM)
+                            if (uris != null) {
+                                importFilesFromUris(uris, ::onImported)
+                                null
+                            } else {
+                                getString(R.string.share_intent_parsing_failed)
                             }
-                            stopTask { alertDialog.show() }
                         }
+                        else -> getString(R.string.share_intent_parsing_failed)
                     }
+                } else {
+                    getString(R.string.share_intent_parsing_failed)
+                }
+                errorMsg?.let {
+                    ColoredAlertDialogBuilder(this)
+                            .setTitle(R.string.error)
+                            .setMessage(it)
+                            .setPositiveButton(R.string.ok, null)
+                            .show()
                 }
                 true
             }
             else -> super.onOptionsItemSelected(item)
         }
     }
+
+    private fun onImported(failedItem: String?){
+        if (failedItem == null) {
+            ColoredAlertDialogBuilder(this)
+                    .setTitle(R.string.success_import)
+                    .setMessage(R.string.success_import_msg)
+                    .setCancelable(false)
+                    .setPositiveButton(R.string.ok){_, _ ->
+                        finish()
+                    }
+                    .show()
+        } else {
+            ColoredAlertDialogBuilder(this)
+                    .setTitle(R.string.error)
+                    .setMessage(getString(R.string.import_failed, failedItem))
+                    .setPositiveButton(R.string.ok, null)
+                    .show()
+        }
+    }
 }

app/src/main/java/sushi/hardcore/droidfs/explorers/ExplorerActivityPick.kt

@@ -17,6 +17,10 @@ class ExplorerActivityPick : BaseExplorerActivity() {
         resultIntent.putExtra("sessionID", gocryptfsVolume.sessionID)
     }
 
+    override fun bindFileOperationService() {
+        //don't bind
+    }
+
     override fun onExplorerItemClick(position: Int) {