add the showmediapicker dialog

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

@@ -3,6 +3,7 @@ package com.simplemobiletools.gallery.activities
 import android.os.Bundle
 import com.simplemobiletools.commons.extensions.updateTextColors
 import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.dialogs.ShowMediaDialog
 import com.simplemobiletools.gallery.extensions.config
 import com.simplemobiletools.gallery.helpers.IMAGES
 import com.simplemobiletools.gallery.helpers.IMAGES_AND_VIDEOS
@@ -65,13 +66,16 @@ class SettingsActivity : SimpleActivity() {
     }
 
     private fun setupShowMedia() {
-        settings_show_media.text = getShowMediaText(config.showMedia)
+        settings_show_media.text = getShowMediaText()
         settings_show_media_holder.setOnClickListener {
-
+            ShowMediaDialog(this) {
+                config.showMedia = it
+                settings_show_media.text = getShowMediaText()
+            }
         }
     }
 
-    private fun getShowMediaText(id: Int) = getString(when (id) {
+    private fun getShowMediaText() = getString(when (config.showMedia) {
         IMAGES_AND_VIDEOS -> R.string.images_and_videos
         IMAGES -> R.string.images
         else -> R.string.videos

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

@@ -0,0 +1,46 @@
+package com.simplemobiletools.gallery.dialogs
+
+import android.app.Activity
+import android.support.v7.app.AlertDialog
+import android.view.LayoutInflater
+import android.widget.RadioGroup
+import com.simplemobiletools.commons.extensions.setupDialogStuff
+import com.simplemobiletools.gallery.R
+import com.simplemobiletools.gallery.extensions.config
+import com.simplemobiletools.gallery.helpers.IMAGES
+import com.simplemobiletools.gallery.helpers.IMAGES_AND_VIDEOS
+import com.simplemobiletools.gallery.helpers.VIDEOS
+import kotlinx.android.synthetic.main.dialog_show_media.view.*
+
+class ShowMediaDialog(val activity: Activity, val callback: (newValue: Int) -> Unit) : AlertDialog.Builder(activity), RadioGroup.OnCheckedChangeListener {
+    val dialog: AlertDialog?
+
+    init {
+        val view = LayoutInflater.from(activity).inflate(R.layout.dialog_show_media, null).dialog_radio_view.apply {
+            check(getSavedItem())
+            setOnCheckedChangeListener(this@ShowMediaDialog)
+        }
+
+        dialog = AlertDialog.Builder(activity)
+                .create().apply {
+            activity.setupDialogStuff(view, this)
+        }
+    }
+
+    override fun onCheckedChanged(group: RadioGroup?, checkedId: Int) {
+        callback.invoke(getNewValue(checkedId))
+        dialog?.dismiss()
+    }
+
+    fun getNewValue(id: Int) = when (id) {
+        R.id.dialog_radio_images -> IMAGES
+        R.id.dialog_radio_videos -> VIDEOS
+        else -> IMAGES_AND_VIDEOS
+    }
+
+    fun getSavedItem() = when (activity.config.showMedia) {
+        IMAGES -> R.id.dialog_radio_images
+        VIDEOS -> R.id.dialog_radio_videos
+        else -> R.id.dialog_radio_images_and_videos
+    }
+}

app/src/main/kotlin/com/simplemobiletools/gallery/extensions/context.kt

@@ -116,4 +116,3 @@ private fun removeNoMediaFolders(paths: MutableList<String>) {
 }
 
 val Context.config: Config get() = Config.newInstance(this)
-

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

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RadioGroup
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/dialog_radio_view"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="@dimen/activity_margin">
+
+    <com.simplemobiletools.commons.views.MyCompatRadioButton
+        android:id="@+id/dialog_radio_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.MyCompatRadioButton
+        android:id="@+id/dialog_radio_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.MyCompatRadioButton
+        android:id="@+id/dialog_radio_images_and_videos"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        android:text="@string/images_and_videos"/>
+
+</RadioGroup>

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

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string-array name="show_media_items" translatable="false">
-        <item>@string/images_and_videos</item>
-        <item>@string/images</item>
-        <item>@string/videos</item>
-    </string-array>
-</resources>