display a dialog for renaming launcher

app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/RecyclerAdapter.kt

@@ -1,6 +1,7 @@
 package com.simplemobiletools.applauncher.adapters
 
 import android.app.Activity
+import android.app.AlertDialog
 import android.support.v7.app.AppCompatActivity
 import android.support.v7.view.ActionMode
 import android.support.v7.widget.RecyclerView
@@ -14,6 +15,7 @@ import com.simplemobiletools.applauncher.extensions.hide
 import com.simplemobiletools.applauncher.extensions.show
 import com.simplemobiletools.applauncher.models.AppLauncher
 import kotlinx.android.synthetic.main.app_launcher_dialog_item.view.*
+import kotlinx.android.synthetic.main.edit_launcher.view.*
 import java.util.*
 
 class RecyclerAdapter(val act: Activity, val launchers: List<AppLauncher>, val itemClick: (AppLauncher) -> Unit) :
@@ -29,7 +31,7 @@ class RecyclerAdapter(val act: Activity, val launchers: List<AppLauncher>, val i
         override fun onActionItemClicked(mode: ActionMode?, item: MenuItem?): Boolean {
             when (item?.itemId) {
                 R.id.cab_edit -> {
-
+                    showEditDialog()
                 }
                 R.id.cab_delete -> {
                     deleteSelectedItems()
@@ -66,6 +68,25 @@ class RecyclerAdapter(val act: Activity, val launchers: List<AppLauncher>, val i
         return launchers.count()
     }
 
+    private fun showEditDialog() {
+        val selectedLauncher = launchers[multiSelector.selectedPositions[0]]
+        val editView = act.layoutInflater.inflate(R.layout.edit_launcher, null)
+        editView.edit_launcher_edittext.setText(selectedLauncher.name)
+
+        val builder = AlertDialog.Builder(act)
+        builder.setTitle(act.getString(R.string.rename_launcher))
+        builder.setView(editView)
+
+        builder.setPositiveButton(R.string.ok, null)
+        builder.setNegativeButton(R.string.cancel, null)
+
+        val alertDialog = builder.create()
+        alertDialog.show()
+        alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
+            alertDialog.dismiss()
+        }
+    }
+
     private fun deleteSelectedItems() {
         val positions = multiSelector.selectedPositions
         val deleteIds = ArrayList<String>(positions.size)

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

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout
+    android:id="@+id/edit_launcher_holder"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="@dimen/activity_margin">
+
+    <EditText
+        android:id="@+id/edit_launcher_edittext"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:inputType="textCapWords"/>
+
+</FrameLayout>

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

@@ -2,6 +2,9 @@
     <string name="app_name">Simple App Launcher</string>
     <string name="delete">Delete</string>
     <string name="edit">Edit</string>
+    <string name="rename_launcher">Rename launcher</string>
+    <string name="ok">OK</string>
+    <string name="cancel">Cancel</string>
 
     <!-- About -->
     <string name="about">About</string>