adding the Filter Media dialog

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

@@ -25,6 +25,7 @@ import com.simplemobiletools.gallery.R
 import com.simplemobiletools.gallery.adapters.DirectoryAdapter
 import com.simplemobiletools.gallery.asynctasks.GetDirectoriesAsynctask
 import com.simplemobiletools.gallery.dialogs.ChangeSortingDialog
+import com.simplemobiletools.gallery.dialogs.FilterMediaDialog
 import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.helpers.*
 import com.simplemobiletools.gallery.models.Directory
@@ -203,7 +204,9 @@ class MainActivity : SimpleActivity(), DirectoryAdapter.DirOperationsListener {
     }
 
     private fun showFilterMediaDialog() {
-
+        FilterMediaDialog(this) {
+            getDirectories()
+        }
     }
 
     private fun showAllMedia() {

app/src/main/kotlin/com/simplemobiletools/gallery/activities/MediaActivity.kt

@@ -27,6 +27,7 @@ import com.simplemobiletools.gallery.adapters.MediaAdapter
 import com.simplemobiletools.gallery.asynctasks.GetMediaAsynctask
 import com.simplemobiletools.gallery.dialogs.ChangeSortingDialog
 import com.simplemobiletools.gallery.dialogs.ExcludeFolderDialog
+import com.simplemobiletools.gallery.dialogs.FilterMediaDialog
 import com.simplemobiletools.gallery.extensions.*
 import com.simplemobiletools.gallery.helpers.*
 import com.simplemobiletools.gallery.models.Medium
@@ -235,7 +236,9 @@ class MediaActivity : SimpleActivity(), MediaAdapter.MediaOperationsListener {
     }
 
     private fun showFilterMediaDialog() {
-
+        FilterMediaDialog(this) {
+            getMedia()
+        }
     }
 
     private fun toggleFilenameVisibility() {

app/src/main/kotlin/com/simplemobiletools/gallery/dialogs/FilterMediaDialog.kt

@@ -0,0 +1,46 @@
+package com.simplemobiletools.gallery.dialogs
+
+import android.support.v7.app.AlertDialog
+import android.view.LayoutInflater
+import android.view.View
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.activities.SimpleActivity
+import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.helpers.GIFS
+import com.simplemobiletools.gallery.helpers.IMAGES
+import com.simplemobiletools.gallery.helpers.VIDEOS
+import kotlinx.android.synthetic.main.dialog_filter_media.view.*
+
+class FilterMediaDialog(val activity: SimpleActivity, val callback: (result: Int) -> Unit) {
+    private var view: View = LayoutInflater.from(activity).inflate(R.layout.dialog_filter_media, null)
+
+    init {
+        val filterMedia = activity.config.filterMedia
+        view.apply {
+            filter_media_images.isChecked = filterMedia and IMAGES != 0
+            filter_media_videos.isChecked = filterMedia and VIDEOS != 0
+            filter_media_gifs.isChecked = filterMedia and GIFS != 0
+        }
+
+        AlertDialog.Builder(activity)
+                .setPositiveButton(R.string.ok, { dialog, which -> dialogConfirmed() })
+                .setNegativeButton(R.string.cancel, null)
+                .create().apply {
+            activity.setupDialogStuff(view, this, R.string.filter_media)
+        }
+    }
+
+    private fun dialogConfirmed() {
+        var result = 0
+        if (view.filter_media_images.isChecked)
+            result += IMAGES
+        if (view.filter_media_videos.isChecked)
+            result += VIDEOS
+        if (view.filter_media_gifs.isChecked)
+            result += GIFS
+
+        activity.config.filterMedia = result
+        callback(result)
+    }
+}

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

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/filter_media_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">
+
+    <com.simplemobiletools.commons.views.MyAppCompatCheckbox
+        android:id="@+id/filter_media_images"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        android:text="@string/images"/>
+
+    <com.simplemobiletools.commons.views.MyAppCompatCheckbox
+        android:id="@+id/filter_media_videos"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        android:text="@string/videos"/>
+
+    <com.simplemobiletools.commons.views.MyAppCompatCheckbox
+        android:id="@+id/filter_media_gifs"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        android:text="@string/gifs"/>
+
+</LinearLayout>