show search result placeholder when no results are shown

app/build.gradle

@@ -43,7 +43,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:3.7.7'
+    implementation 'com.simplemobiletools:commons:3.7.9'
     implementation 'joda-time:joda-time:2.9.9'
     implementation 'com.facebook.stetho:stetho:1.5.0'
     implementation 'com.android.support:multidex:1.0.2'

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

@@ -6,6 +6,7 @@ import android.content.Intent
 import android.content.pm.ActivityInfo
 import android.database.ContentObserver
 import android.database.Cursor
+import android.graphics.drawable.ColorDrawable
 import android.net.Uri
 import android.os.Bundle
 import android.os.Handler
@@ -147,6 +148,7 @@ class MainActivity : SimpleActivity(), NavigationListener {
 
         updateWidgets()
         updateTextColors(calendar_coordinator)
+        search_holder.background = ColorDrawable(config.backgroundColor)
     }
 
     override fun onPause() {
@@ -221,7 +223,7 @@ class MainActivity : SimpleActivity(), NavigationListener {
                 override fun onQueryTextSubmit(query: String) = false
 
                 override fun onQueryTextChange(newText: String): Boolean {
-                    if (mIsSearchOpen && newText.length >= 3) {
+                    if (mIsSearchOpen) {
                         searchQueryChanged(newText)
                     }
                     return true
@@ -232,11 +234,16 @@ class MainActivity : SimpleActivity(), NavigationListener {
         MenuItemCompat.setOnActionExpandListener(mSearchMenuItem, object : MenuItemCompat.OnActionExpandListener {
             override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
                 mIsSearchOpen = true
+                search_holder.beVisible()
+                calendar_fab.beGone()
+                searchQueryChanged("")
                 return true
             }
 
             override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
                 mIsSearchOpen = false
+                search_holder.beGone()
+                calendar_fab.beVisible()
                 return true
             }
         })
@@ -772,12 +779,15 @@ class MainActivity : SimpleActivity(), NavigationListener {
 
     private fun searchQueryChanged(text: String) {
         mLatestSearchQuery = text
+        search_placeholder_2.beGoneIf(text.length >= 2)
+        if (text.length >= 2) {
             dbHelper.getEventsWithSearchQuery(text) { searchedText, events ->
                 if (searchedText == mLatestSearchQuery) {
 
                 }
             }
         }
+    }
 
     override fun goLeft() {
         main_view_pager.currentItem = main_view_pager.currentItem - 1

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

@@ -23,9 +23,9 @@
                 android:id="@+id/week_view_hours_divider"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                android:importantForAccessibility="no"
                 android:layout_alignRight="@+id/week_view_hours_scrollview"
-                android:background="@drawable/stroke_bottom_right"/>
+                android:background="@drawable/stroke_bottom_right"
+                android:importantForAccessibility="no"/>
 
             <com.simplemobiletools.calendar.views.MyScrollView
                 android:id="@+id/week_view_hours_scrollview"
@@ -76,4 +76,44 @@
         app:backgroundTint="@color/color_primary"
         app:rippleColor="@color/pressed_item_foreground"/>
 
+    <RelativeLayout
+        android:id="@+id/search_holder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:clickable="true"
+        android:visibility="gone">
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:id="@+id/search_placeholder"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_centerHorizontal="true"
+            android:layout_marginTop="@dimen/activity_margin"
+            android:gravity="center"
+            android:paddingLeft="@dimen/activity_margin"
+            android:paddingRight="@dimen/activity_margin"
+            android:text="@string/no_items_found"
+            android:textSize="@dimen/bigger_text_size"/>
+
+        <com.simplemobiletools.commons.views.MyTextView
+            android:id="@+id/search_placeholder_2"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_below="@+id/search_placeholder"
+            android:layout_centerHorizontal="true"
+            android:gravity="center"
+            android:paddingBottom="@dimen/medium_margin"
+            android:paddingLeft="@dimen/activity_margin"
+            android:paddingRight="@dimen/activity_margin"
+            android:paddingTop="@dimen/medium_margin"
+            android:text="@string/type_2_characters"
+            android:textSize="@dimen/bigger_text_size"/>
+
+        <com.simplemobiletools.commons.views.MyRecyclerView
+            android:id="@+id/search_results"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+
+    </RelativeLayout>
+
 </android.support.design.widget.CoordinatorLayout>