fix saving photos on SD card

app/src/main/java/com/simplemobiletools/camera/PhotoProcessor.kt

@@ -3,16 +3,13 @@ package com.simplemobiletools.camera
 import android.net.Uri
 import android.os.AsyncTask
 import android.util.Log
-
 import com.simplemobiletools.camera.activities.MainActivity
-
-import java.io.File
-import java.io.FileNotFoundException
-import java.io.FileOutputStream
-import java.io.IOException
+import com.simplemobiletools.camera.extensions.getFileDocument
+import com.simplemobiletools.camera.extensions.needsStupidWritePermissions
+import java.io.*
 import java.lang.ref.WeakReference
 
-class PhotoProcessor(activity: MainActivity, val uri: Uri?) : AsyncTask<ByteArray, Void, String>() {
+class PhotoProcessor(val activity: MainActivity, val uri: Uri?) : AsyncTask<ByteArray, Void, String>() {
     companion object {
         private val TAG = PhotoProcessor::class.java.simpleName
         private var mActivity: WeakReference<MainActivity>? = null
@@ -23,7 +20,7 @@ class PhotoProcessor(activity: MainActivity, val uri: Uri?) : AsyncTask<ByteArra
     }
 
     override fun doInBackground(vararg params: ByteArray): String {
-        var fos: FileOutputStream? = null
+        var fos: OutputStream? = null
         val path: String
         try {
             if (uri != null) {
@@ -37,10 +34,17 @@ class PhotoProcessor(activity: MainActivity, val uri: Uri?) : AsyncTask<ByteArra
             }
 
             val photoFile = File(path)
+            if (activity.needsStupidWritePermissions(path)) {
+                var document = activity.getFileDocument(path)
+                document = document.createFile("", path.substring(path.lastIndexOf('/') + 1))
+                fos = activity.contentResolver.openOutputStream(document.uri)
+            } else {
+                fos = FileOutputStream(photoFile)
+            }
+
             val data = params[0]
-            fos = FileOutputStream(photoFile)
-            fos.write(data)
-            fos.close()
+            fos?.write(data)
+            fos?.close()
             return photoFile.absolutePath
         } catch (e: FileNotFoundException) {
             Log.e(TAG, "PhotoProcessor file not found: " + e.message)

app/src/main/kotlin/com/simplemobiletools/camera/activities/SettingsActivity.kt

@@ -12,8 +12,7 @@ import android.view.View
 import android.widget.AdapterView
 import com.simplemobiletools.camera.R
 import com.simplemobiletools.camera.dialogs.WritePermissionDialog
-import com.simplemobiletools.camera.extensions.isKitkat
-import com.simplemobiletools.camera.extensions.isPathOnSD
+import com.simplemobiletools.camera.extensions.needsStupidWritePermissions
 import com.simplemobiletools.filepicker.dialogs.FilePickerDialog
 import kotlinx.android.synthetic.main.activity_settings.*
 import java.io.File
@@ -68,7 +67,7 @@ class SettingsActivity : SimpleActivity() {
 
                 override fun onSuccess(pickedPath: String) {
                     mCurrPath = pickedPath.trimEnd('/')
-                    if (!File(pickedPath).canWrite() && isPathOnSD(pickedPath) && isKitkat() && mConfig.treeUri.isEmpty()) {
+                    if (!File(pickedPath).canWrite() && needsStupidWritePermissions(pickedPath) && mConfig.treeUri.isEmpty()) {
                         WritePermissionDialog(this@SettingsActivity, object : WritePermissionDialog.OnWritePermissionListener {
                             override fun onCancelled() {
                                 mCurrPath = mConfig.savePhotosFolder

app/src/main/kotlin/com/simplemobiletools/camera/dialogs/WritePermissionDialog.kt

@@ -15,7 +15,7 @@ class WritePermissionDialog(val context: Context, val listener: OnWritePermissio
                 .setTitle(context.resources.getString(R.string.confirm_storage_access_title))
                 .setView(view)
                 .setPositiveButton(R.string.ok, { dialog, which -> dialogConfirmed() })
-                .setOnCancelListener { listener?.onCancelled() }
+                .setOnCancelListener { listener.onCancelled() }
                 .create()
 
         dialog?.show()

app/src/main/kotlin/com/simplemobiletools/camera/extensions/Context.kt

@@ -1,9 +1,26 @@
 package com.simplemobiletools.camera.extensions
 
 import android.content.Context
+import android.net.Uri
 import android.os.Build
+import android.support.v4.provider.DocumentFile
+import com.simplemobiletools.camera.Config
 import com.simplemobiletools.filepicker.extensions.getSDCardPath
 
+fun Context.needsStupidWritePermissions(path: String) = isPathOnSD(path) && isKitkat()
+
 fun Context.isPathOnSD(path: String) = path.startsWith(getSDCardPath())
 
 fun Context.isKitkat() = Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT
+
+fun Context.getFileDocument(path: String): DocumentFile {
+    val relativePath = path.substring(getSDCardPath().length + 1)
+    var document = DocumentFile.fromTreeUri(this, Uri.parse(Config.newInstance(this).treeUri))
+    val parts = relativePath.split("/")
+    for (part in parts) {
+        val currDocument = document.findFile(part)
+        if (currDocument != null)
+            document = currDocument
+    }
+    return document
+}