add an image about the Kitkat new write permission thing

app/src/main/kotlin/com/simplemobiletools/filemanager/activities/MainActivity.kt

@@ -14,6 +14,7 @@ import android.view.MenuItem
 import com.simplemobiletools.filemanager.Constants
 import com.simplemobiletools.filemanager.R
 import com.simplemobiletools.filemanager.Utils
+import com.simplemobiletools.filemanager.dialogs.WritePermissionDialog
 import com.simplemobiletools.filemanager.fragments.ItemsFragment
 import com.simplemobiletools.filepicker.dialogs.StoragePickerDialog
 import com.simplemobiletools.filepicker.extensions.getInternalStoragePath
@@ -137,8 +138,12 @@ class MainActivity : SimpleActivity(), ItemsFragment.ItemInteractionListener, Br
     fun checkStupidAndroidFiveSDCardWritePermission(pickedPath: String): Boolean {
         val file = File(pickedPath)
         return if (!file.canWrite() && Utils.needsStupidWritePermissions(applicationContext, pickedPath) && mConfig.treeUri.isEmpty()) {
-            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
-            startActivityForResult(intent, OPEN_DOCUMENT_TREE)
+            WritePermissionDialog(this, object: WritePermissionDialog.OnWritePermissionListener {
+                override fun onConfirmed() {
+                    val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+                    startActivityForResult(intent, OPEN_DOCUMENT_TREE)
+                }
+            })
             false
         } else
             true

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

@@ -0,0 +1,31 @@
+package com.simplemobiletools.filemanager.dialogs
+
+import android.content.Context
+import android.support.v7.app.AlertDialog
+import android.view.LayoutInflater
+import com.simplemobiletools.filemanager.R
+
+class WritePermissionDialog(val context: Context, val listener: OnWritePermissionListener) {
+    var dialog: AlertDialog? = null
+
+    init {
+        val view = LayoutInflater.from(context).inflate(R.layout.write_permission, null)
+
+        dialog = AlertDialog.Builder(context)
+                .setTitle(context.resources.getString(R.string.confirm_storage_access_title))
+                .setView(view)
+                .setPositiveButton(R.string.ok, { dialog, which -> dialogConfirmed() })
+                .create()
+
+        dialog?.show()
+    }
+
+    private fun dialogConfirmed() {
+        dialog?.dismiss()
+        listener.onConfirmed()
+    }
+
+    interface OnWritePermissionListener {
+        fun onConfirmed()
+    }
+}

app/src/main/res/layout/write_permission.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/dialog_holder"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:padding="@dimen/activity_margin">
+
+    <TextView
+        android:id="@+id/dialog_text"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/activity_margin"
+        android:text="@string/confirm_storage_access_text"/>
+
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:scaleType="fitCenter"
+        android:adjustViewBounds="true"
+        android:src="@mipmap/write_storage"/>
+
+</LinearLayout>

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

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Abbrechen</string>
     <string name="press_back_again">Drücke erneut zum Schließen</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Name</string>

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

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Annulla</string>
     <string name="press_back_again">Premi di nuovo indietro per uscire</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Nome</string>

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

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Cancel</string>
     <string name="press_back_again">Press back again to exit</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Name</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Cancelar</string>
     <string name="press_back_again">Press back again to exit</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Nome</string>

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

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Cancel</string>
     <string name="press_back_again">Press back again to exit</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Name</string>

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

@@ -37,6 +37,8 @@
     <string name="ok">OK</string>
     <string name="cancel">Cancel</string>
     <string name="press_back_again">Press back again to exit</string>
+    <string name="confirm_storage_access_title">Confirm external storage access</string>
+    <string name="confirm_storage_access_text">Please choose the root folder of the SD card to grant write access on the next screen</string>
 
     <!-- File and directory properties -->
     <string name="name">Name</string>