Bug fixes & Allow export to SD cards

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

@@ -37,6 +37,7 @@ class OpenActivity : BaseActivity() {
     private lateinit var fingerprintPasswordHashSaver: FingerprintPasswordHashSaver
     private lateinit var rootCipherDir: String
     private var sessionID = -1
+    private var isStartingActivity = false
     private var isFinishingIntentionally = false
     private var usf_fingerprint = false
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -83,6 +84,7 @@ class OpenActivity : BaseActivity() {
 
     fun pickDirectory(view: View?) {
         val i = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+        isStartingActivity = true
         startActivityForResult(i, PICK_DIRECTORY_REQUEST_CODE)
     }
 
@@ -237,8 +239,12 @@ class OpenActivity : BaseActivity() {
     override fun onPause() {
         super.onPause()
         if (intent.action == "pick"){
+            if (isStartingActivity){
+                isStartingActivity = false
+            } else {
                 finish()
             }
+        }
         if (::fingerprintPasswordHashSaver.isInitialized && fingerprintPasswordHashSaver.isListening){
             fingerprintPasswordHashSaver.stopListening()
             if (fingerprintPasswordHashSaver.fingerprintFragment.isAdded){

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

@@ -144,11 +144,10 @@ open class BaseExplorerActivity : BaseActivity() {
                             .show()
                     }
                 }
-            } else {
+            }
+        }
         invalidateOptionsMenu()
     }
-        }
-    }
 
     protected open fun onExplorerItemLongClick(position: Int) {
         explorerAdapter.onItemLongClick(position)
@@ -425,10 +424,14 @@ open class BaseExplorerActivity : BaseActivity() {
 
     override fun onPause() {
         super.onPause()
-        if (!isChangingConfigurations && !isStartingActivity){
+        if (!isChangingConfigurations){
+            if (isStartingActivity){
+                isStartingActivity = false
+            } else {
                 finish()
             }
         }
+    }
 
     override fun onResume() {
         super.onResume()

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

@@ -11,6 +11,7 @@ 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
@@ -225,16 +226,17 @@ class ExplorerActivity : BaseExplorerActivity() {
             if (resultCode == Activity.RESULT_OK && data != null) {
                 object : LoadingTask(this, R.string.loading_msg_export){
                     override fun doTask(activity: AppCompatActivity) {
-                        val uri = data.data
+                        data.data?.let {uri ->
-                        val outputDir = PathUtils.getFullPathFromTreeUri(uri, activity)
+                            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.path_join(currentDirectoryPath, element.name)
                                     failedItem = if (element.isDirectory) {
-                                recursiveExportDirectory(fullPath, outputDir)
+                                        recursiveExportDirectory(fullPath, treeDocumentFile)
                                     } else {
-                                if (gocryptfsVolume.exportFile(fullPath, PathUtils.path_join(outputDir, element.name))) null else fullPath
+                                        if (exportFileInto(fullPath, treeDocumentFile)) null else fullPath
                                     }
                                     if (failedItem != null) {
                                         stopTask {
@@ -257,6 +259,8 @@ class ExplorerActivity : BaseExplorerActivity() {
                                     }
                                 }
                             }
+                        }
+                    }
                     override fun doFinally(activity: AppCompatActivity) {
                         unselectAll()
                     }
@@ -631,7 +635,7 @@ class ExplorerActivity : BaseExplorerActivity() {
     }
 
     private fun recursiveImportDirectoryFromOtherVolume(remote_gocryptfsVolume: GocryptfsVolume, remote_directory_path: String, outputPath: String): String? {
-        val mappedElements = gocryptfsVolume.recursiveMapFiles(remote_directory_path)
+        val mappedElements = remote_gocryptfsVolume.recursiveMapFiles(remote_directory_path)
         val dstDirectoryPath = checkPathOverwrite(PathUtils.path_join(outputPath, File(remote_directory_path).name), true)
         if (dstDirectoryPath == null){
             return ""
@@ -663,23 +667,34 @@ class ExplorerActivity : BaseExplorerActivity() {
         return null
     }
 
-    private fun recursiveExportDirectory(plain_directory_path: String, output_dir: String?): String? {
+    private fun exportFileInto(srcPath: String, treeDocumentFile: DocumentFile): Boolean {
-        if (File(PathUtils.path_join(output_dir, plain_directory_path)).mkdir()) {
+        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(plain_directory_path)?.let {childTree ->
             val explorerElements = gocryptfsVolume.listDir(plain_directory_path)
             for (e in explorerElements) {
                 val fullPath = PathUtils.path_join(plain_directory_path, e.name)
                 if (e.isDirectory) {
-                    val failedItem = recursiveExportDirectory(fullPath, output_dir)
+                    val failedItem = recursiveExportDirectory(fullPath, childTree)
                     failedItem?.let { return it }
                 } else {
-                    if (!gocryptfsVolume.exportFile(fullPath, PathUtils.path_join(output_dir, fullPath))) {
+                    if (!exportFileInto(fullPath, childTree)){
                         return fullPath
                     }
                 }
             }
             return null
         }
-        return output_dir
+        return treeDocumentFile.name
     }
 
     private fun recursiveRemoveDirectory(plain_directory_path: String): String? {

app/src/main/res/menu/explorer.xml

@@ -32,7 +32,7 @@
         app:showAsAction="ifRoom"
         android:visible="false"
         android:icon="@drawable/icon_decrypt"
-        android:title="@string/decrypt"/>
+        android:title="@string/decrypt_files"/>
 
     <item
         android:id="@+id/share"

app/src/main/res/values/strings.xml

@@ -138,7 +138,7 @@
     <string name="github">GitHub</string>
     <string name="github_summary">Want to read the documentation, request feature, report bug, read the source code… Check the DroidFS\'s repository !</string>
     <string name="share">Share</string>
-    <string name="decrypt">Decrypt</string>
+    <string name="decrypt_files">Export/Decrypt</string>
     <string name="loading_msg_copy">Copying selected items…</string>
     <string name="copy_failed">Copy of %s failed.</string>
     <string name="copy_success_msg">The selected items have been successfully copied.</string>