fix #148, remember the last used note save folder

Author: tibbi

app/src/main/kotlin/com/simplemobiletools/notes/dialogs/ExportAsDialog.kt

@@ -1,6 +1,5 @@
 package com.simplemobiletools.notes.dialogs
 
-import android.os.Environment
 import android.support.v7.app.AlertDialog
 import android.view.WindowManager
 import com.simplemobiletools.commons.dialogs.FilePickerDialog
@@ -15,7 +14,7 @@ import java.io.File
 class ExportAsDialog(val activity: SimpleActivity, val note: Note, val callback: (exportPath: String) -> Unit) {
 
     init {
-        var realPath = File(note.path).parent ?: Environment.getExternalStorageDirectory().toString()
+        var realPath = File(note.path).parent ?: activity.config.lastUsedSavePath
         val view = activity.layoutInflater.inflate(R.layout.dialog_export_as, null).apply {
             file_path.text = activity.humanizePath(realPath)
 
@@ -52,6 +51,7 @@ class ExportAsDialog(val activity: SimpleActivity, val note: Note, val callback:
                     }
 
                     activity.config.lastUsedExtension = extension
+                    activity.config.lastUsedSavePath = realPath
                     callback(newFile.absolutePath)
                     dismiss()
                 }

app/src/main/kotlin/com/simplemobiletools/notes/helpers/Config.kt

@@ -1,6 +1,7 @@
 package com.simplemobiletools.notes.helpers
 
 import android.content.Context
+import android.os.Environment
 import com.simplemobiletools.commons.helpers.BaseConfig
 
 class Config(context: Context) : BaseConfig(context) {
@@ -51,4 +52,8 @@ class Config(context: Context) : BaseConfig(context) {
     var lastUsedExtension: String
         get() = prefs.getString(LAST_USED_EXTENSION, "txt")
         set(lastUsedExtension) = prefs.edit().putString(LAST_USED_EXTENSION, lastUsedExtension).apply()
+
+    var lastUsedSavePath: String
+        get() = prefs.getString(LAST_USED_SAVE_PATH, Environment.getExternalStorageDirectory().toString())
+        set(lastUsedSavePath) = prefs.edit().putString(LAST_USED_SAVE_PATH, lastUsedSavePath).apply()
 }

app/src/main/kotlin/com/simplemobiletools/notes/helpers/Constants.kt

@@ -15,6 +15,7 @@ val FONT_SIZE = "font_size"
 val GRAVITY = "gravity"
 val CURSOR_PLACEMENT = "cursor_placement"
 val LAST_USED_EXTENSION = "last_used_extension"
+val LAST_USED_SAVE_PATH = "last_used_save_path"
 
 // gravity
 val GRAVITY_LEFT = 0