adding initial search, related to #34

app/src/main/AndroidManifest.xml

@@ -25,6 +25,15 @@
         </activity>
 
         <activity android:name=".activities.MainActivity">
+
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:resource="@xml/searchable"/>
+
+            <intent-filter>
+                <action android:name="android.intent.action.SEARCH"/>
+            </intent-filter>
+
             <intent-filter>
                 <action android:name="android.intent.action.GET_CONTENT"/>
                 <data android:mimeType="*/*"/>

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

@@ -1,11 +1,15 @@
 package com.simplemobiletools.filemanager.activities
 
 import android.app.Activity
+import android.app.SearchManager
 import android.content.ClipData
+import android.content.Context
 import android.content.Intent
 import android.media.RingtoneManager
 import android.os.Bundle
 import android.os.Handler
+import android.support.v4.view.MenuItemCompat
+import android.support.v7.widget.SearchView
 import android.view.Menu
 import android.view.MenuItem
 import com.simplemobiletools.commons.dialogs.RadioGroupDialog
@@ -26,9 +30,13 @@ import java.io.File
 import java.util.*
 
 class MainActivity : SimpleActivity() {
+    var isSearchOpen = false
+
     private val BACK_PRESS_TIMEOUT = 5000
     private var wasBackJustPressed = false
-    private var mStoredUseEnglish = false
+    private var searchMenuItem: MenuItem? = null
+
+    private var storedUseEnglish = false
 
     private lateinit var fragment: ItemsFragment
 
@@ -54,7 +62,7 @@ class MainActivity : SimpleActivity() {
 
     override fun onResume() {
         super.onResume()
-        if (mStoredUseEnglish != config.useEnglish) {
+        if (storedUseEnglish != config.useEnglish) {
             restartActivity()
             return
         }
@@ -85,11 +93,45 @@ class MainActivity : SimpleActivity() {
             findItem(R.id.stop_showing_hidden).isVisible = config.temporarilyShowHidden
         }
 
+        setupSearch(menu)
         return true
     }
 
     private fun storeStateVariables() {
-        mStoredUseEnglish = config.useEnglish
+        storedUseEnglish = config.useEnglish
+    }
+
+    private fun setupSearch(menu: Menu) {
+        val searchManager = getSystemService(Context.SEARCH_SERVICE) as SearchManager
+        searchMenuItem = menu.findItem(R.id.search)
+        (searchMenuItem!!.actionView as SearchView).apply {
+            setSearchableInfo(searchManager.getSearchableInfo(componentName))
+            isSubmitButtonEnabled = false
+            queryHint = getString(R.string.search_folder)
+            setOnQueryTextListener(object : SearchView.OnQueryTextListener {
+                override fun onQueryTextSubmit(query: String) = false
+
+                override fun onQueryTextChange(newText: String): Boolean {
+                    if (isSearchOpen) {
+                        fragment.searchQueryChanged(newText)
+                    }
+                    return true
+                }
+            })
+        }
+
+        MenuItemCompat.setOnActionExpandListener(searchMenuItem, object : MenuItemCompat.OnActionExpandListener {
+            override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
+                isSearchOpen = true
+                return true
+            }
+
+            override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
+                isSearchOpen = false
+                fragment.searchClosed()
+                return true
+            }
+        })
     }
 
     private fun tryInitFileManager() {
@@ -275,6 +317,10 @@ class MainActivity : SimpleActivity() {
         finish()
     }
 
+    fun openedDirectory() {
+        MenuItemCompat.collapseActionView(searchMenuItem)
+    }
+
     private fun checkWhatsNewDialog() {
         arrayListOf<Release>().apply {
             add(Release(26, R.string.release_26))

app/src/main/kotlin/com/simplemobiletools/filemanager/fragments/ItemsFragment.kt

@@ -36,11 +36,13 @@ class ItemsFragment : Fragment(), ItemsAdapter.ItemOperationsListener, Breadcrum
     var isGetRingtonePicker = false
     var isPickMultipleIntent = false
 
-    private var storedTextColor = 0
     private var showHidden = false
+    private var skipItemUpdating = false
     private var storedItems = ArrayList<FileDirItem>()
     private var scrollStates = HashMap<String, Parcelable>()
 
+    private var storedTextColor = 0
+
     private lateinit var mView: View
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
@@ -127,6 +129,7 @@ class ItemsFragment : Fragment(), ItemsAdapter.ItemOperationsListener, Breadcrum
     }
 
     private fun addItems(items: ArrayList<FileDirItem>) {
+        skipItemUpdating = false
         mView.apply {
             activity?.runOnUiThread {
                 items_swipe_refresh?.isRefreshing = false
@@ -168,6 +171,7 @@ class ItemsFragment : Fragment(), ItemsAdapter.ItemOperationsListener, Breadcrum
     private fun getRecyclerLayoutManager() = (mView.items_list.layoutManager as LinearLayoutManager)
 
     private fun getItems(path: String, callback: (items: ArrayList<FileDirItem>) -> Unit) {
+        skipItemUpdating = false
         Thread {
             if (activity?.isActivityDestroyed() == false) {
                 if (!context!!.config.enableRootAccess || !context!!.isPathOnRoot(path)) {
@@ -227,6 +231,10 @@ class ItemsFragment : Fragment(), ItemsAdapter.ItemOperationsListener, Breadcrum
 
     private fun itemClicked(item: FileDirItem) {
         if (item.isDirectory) {
+            (activity as? MainActivity)?.apply {
+                skipItemUpdating = isSearchOpen
+                openedDirectory()
+            }
             openPath(item.path)
         } else {
             val path = item.path
@@ -245,6 +253,23 @@ class ItemsFragment : Fragment(), ItemsAdapter.ItemOperationsListener, Breadcrum
         }
     }
 
+    fun searchQueryChanged(text: String) {
+        Thread {
+            val filtered = storedItems.filter { it.name.contains(text, true) } as ArrayList
+            filtered.sortBy { !it.name.startsWith(text, true) }
+            activity?.runOnUiThread {
+                (items_list.adapter as ItemsAdapter).updateItems(filtered)
+            }
+        }.start()
+    }
+
+    fun searchClosed() {
+        if (!skipItemUpdating) {
+            (items_list.adapter as ItemsAdapter).updateItems(storedItems)
+        }
+        skipItemUpdating = false
+    }
+
     private fun createNewItem() {
         CreateNewItemDialog(activity as SimpleActivity, currentPath) {
             if (it) {

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

@@ -1,6 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/search"
+        android:icon="@drawable/ic_search"
+        android:title="@string/search"
+        app:actionViewClass="android.support.v7.widget.SearchView"
+        app:showAsAction="collapseActionView|ifRoom"/>
     <item
         android:id="@+id/go_home"
         android:icon="@drawable/ic_home"

app/src/main/res/xml/searchable.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<searchable
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:hint="@string/search_folder"
+    android:label="@string/app_name"/>