add some initial sorting related things

app/build.gradle

@@ -32,7 +32,7 @@ android {
 }
 
 dependencies {
-    compile 'com.simplemobiletools:commons:2.13.0'
+    compile 'com.simplemobiletools:commons:2.13.5'
     compile 'com.bignerdranch.android:recyclerview-multiselect:0.2'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }

app/src/main/kotlin/com/simplemobiletools/filemanager/Config.kt

@@ -3,6 +3,7 @@ package com.simplemobiletools.filemanager
 import android.content.Context
 import com.simplemobiletools.commons.extensions.getInternalStoragePath
 import com.simplemobiletools.commons.helpers.BaseConfig
+import com.simplemobiletools.commons.helpers.SORT_BY_NAME
 import java.io.File
 import java.util.*
 
@@ -40,4 +41,24 @@ class Config(context: Context) : BaseConfig(context) {
     var favorites: MutableSet<String>
         get() = prefs.getStringSet(FAVORITES, HashSet<String>())
         set(favorites) = prefs.edit().remove(FAVORITES).putStringSet(FAVORITES, favorites).apply()
+
+    var sorting: Int
+        get() = prefs.getInt(SORT_ORDER, SORT_BY_NAME)
+        set(sorting) = prefs.edit().putInt(SORT_ORDER, sorting).apply()
+
+    fun saveFolderSorting(path: String, value: Int) {
+        if (path.isEmpty()) {
+            sorting = value
+        } else {
+            prefs.edit().putInt(SORT_FOLDER_PREFIX + path, value).apply()
+        }
+    }
+
+    fun getFolderSorting(path: String) = prefs.getInt(SORT_FOLDER_PREFIX + path, sorting)
+
+    fun removeFolderSorting(path: String) {
+        prefs.edit().remove(SORT_FOLDER_PREFIX + path).apply()
+    }
+
+    fun hasCustomSorting(path: String) = prefs.contains(SORT_FOLDER_PREFIX + path)
 }

app/src/main/kotlin/com/simplemobiletools/filemanager/Constants.kt

@@ -7,3 +7,5 @@ val SCROLL_STATE = "scroll_state"
 val SHOW_HIDDEN = "show_hidden"
 val HOME_FOLDER = "home_folder"
 val FAVORITES = "favorites"
+val SORT_ORDER = "sort_order"
+val SORT_FOLDER_PREFIX = "sort_folder_"

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

@@ -22,6 +22,7 @@ import com.simplemobiletools.filemanager.BuildConfig
 import com.simplemobiletools.filemanager.PATH
 import com.simplemobiletools.filemanager.R
 import com.simplemobiletools.filemanager.SCROLL_STATE
+import com.simplemobiletools.filemanager.dialogs.ChangeSortingDialog
 import com.simplemobiletools.filemanager.extensions.config
 import com.simplemobiletools.filemanager.fragments.ItemsFragment
 import kotlinx.android.synthetic.main.activity_main.*
@@ -121,6 +122,7 @@ class MainActivity : SimpleActivity(), ItemsFragment.ItemInteractionListener, Br
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
             R.id.go_home -> goHome()
+            R.id.sort -> showSortingDialog()
             R.id.add_favorite -> addFavorite()
             R.id.remove_favorite -> removeFavorite()
             R.id.go_to_favorite -> goToFavorite()
@@ -136,6 +138,12 @@ class MainActivity : SimpleActivity(), ItemsFragment.ItemInteractionListener, Br
         openPath(config.homeFolder)
     }
 
+    private fun showSortingDialog() {
+        ChangeSortingDialog(this, currentPath) {
+
+        }
+    }
+
     private fun addFavorite() {
         config.addFavorite(currentPath)
         invalidateOptionsMenu()

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

@@ -0,0 +1,86 @@
+package com.simplemobiletools.filemanager.dialogs
+
+import android.content.DialogInterface
+import android.support.v7.app.AlertDialog
+import android.view.LayoutInflater
+import android.view.View
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import com.simplemobiletools.commons.helpers.*
+import com.simplemobiletools.filemanager.Config
+import com.simplemobiletools.filemanager.R
+import com.simplemobiletools.filemanager.activities.SimpleActivity
+import com.simplemobiletools.filemanager.extensions.config
+import kotlinx.android.synthetic.main.dialog_change_sorting.view.*
+
+class ChangeSortingDialog(val activity: SimpleActivity, val path: String = "", val callback: () -> Unit) :
+        DialogInterface.OnClickListener {
+    companion object {
+        private var currSorting = 0
+
+        lateinit var config: Config
+        lateinit var view: View
+    }
+
+    init {
+        config = activity.config
+        view = LayoutInflater.from(activity).inflate(R.layout.dialog_change_sorting, null).apply {
+            sorting_dialog_use_for_this_folder.isChecked = config.hasCustomSorting(path)
+        }
+
+        AlertDialog.Builder(activity)
+                .setPositiveButton(R.string.ok, this)
+                .setNegativeButton(R.string.cancel, null)
+                .create().apply {
+            activity.setupDialogStuff(view, this, R.string.sort_by)
+        }
+
+        currSorting = config.getFolderSorting(path)
+        setupSortRadio()
+        setupOrderRadio()
+    }
+
+    private fun setupSortRadio() {
+        val sortingRadio = view.sorting_dialog_radio_sorting
+        var sortBtn = sortingRadio.sorting_dialog_radio_name
+
+        if (currSorting and SORT_BY_SIZE != 0) {
+            sortBtn = sortingRadio.sorting_dialog_radio_size
+        } else if (currSorting and SORT_BY_DATE_MODIFIED != 0) {
+            sortBtn = sortingRadio.sorting_dialog_radio_last_modified
+        } else if (currSorting and SORT_BY_DATE_TAKEN != 0)
+            sortBtn = sortingRadio.sorting_dialog_radio_date_taken
+        sortBtn.isChecked = true
+    }
+
+    private fun setupOrderRadio() {
+        val orderRadio = view.sorting_dialog_radio_order
+        var orderBtn = orderRadio.sorting_dialog_radio_ascending
+
+        if (currSorting and SORT_DESCENDING != 0) {
+            orderBtn = orderRadio.sorting_dialog_radio_descending
+        }
+        orderBtn.isChecked = true
+    }
+
+    override fun onClick(dialog: DialogInterface, which: Int) {
+        val sortingRadio = view.sorting_dialog_radio_sorting
+        var sorting = when (sortingRadio.checkedRadioButtonId) {
+            R.id.sorting_dialog_radio_name -> SORT_BY_NAME
+            R.id.sorting_dialog_radio_size -> SORT_BY_SIZE
+            R.id.sorting_dialog_radio_last_modified -> SORT_BY_DATE_MODIFIED
+            else -> SORT_BY_DATE_TAKEN
+        }
+
+        if (view.sorting_dialog_radio_order.checkedRadioButtonId == R.id.sorting_dialog_radio_descending) {
+            sorting = sorting or SORT_DESCENDING
+        }
+
+        if (view.sorting_dialog_use_for_this_folder.isChecked) {
+            config.saveFolderSorting(path, sorting)
+        } else {
+            config.removeFolderSorting(path)
+            config.sorting = sorting
+        }
+        callback.invoke()
+    }
+}

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

@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/sorting_dialog_scrollview"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:id="@+id/sorting_dialog_holder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingLeft="@dimen/activity_margin"
+        android:paddingRight="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin">
+
+        <RadioGroup
+            android:id="@+id/sorting_dialog_radio_sorting"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="@dimen/medium_margin">
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_name"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/name"/>
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_size"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/size"/>
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_last_modified"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/last_modified"/>
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_date_taken"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/date_taken"/>
+
+        </RadioGroup>
+
+        <include
+            layout="@layout/divider"/>
+
+        <RadioGroup
+            android:id="@+id/sorting_dialog_radio_order"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/medium_margin"
+            android:paddingBottom="@dimen/medium_margin">
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_ascending"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/ascending"/>
+
+            <com.simplemobiletools.commons.views.MyCompatRadioButton
+                android:id="@+id/sorting_dialog_radio_descending"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="@dimen/medium_margin"
+                android:paddingTop="@dimen/medium_margin"
+                android:text="@string/descending"/>
+        </RadioGroup>
+
+        <include
+            android:id="@+id/use_for_this_folder_divider"
+            layout="@layout/divider"/>
+
+        <com.simplemobiletools.commons.views.MyAppCompatCheckbox
+            android:id="@+id/sorting_dialog_use_for_this_folder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:paddingBottom="@dimen/activity_margin"
+            android:paddingTop="@dimen/activity_margin"
+            android:text="@string/use_for_this_folder"/>
+
+    </LinearLayout>
+</ScrollView>

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

@@ -6,6 +6,11 @@
         android:icon="@drawable/ic_home"
         android:title="@string/go_to_home_folder"
         app:showAsAction="ifRoom"/>
+    <item
+        android:id="@+id/sort"
+        android:icon="@drawable/ic_sort"
+        android:title="@string/sort_by"
+        app:showAsAction="ifRoom"/>
     <item
         android:id="@+id/add_favorite"
         android:icon="@drawable/ic_star_off"