show a popup menu at long pressing the home screen

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

@@ -4,13 +4,14 @@ import android.animation.ObjectAnimator
 import android.content.res.Configuration
 import android.graphics.Color
 import android.os.Bundle
+import android.view.ContextThemeWrapper
 import android.view.GestureDetector
+import android.view.Gravity
 import android.view.MotionEvent
 import android.view.animation.DecelerateInterpolator
+import android.widget.PopupMenu
 import androidx.core.view.GestureDetectorCompat
-import com.simplemobiletools.commons.extensions.appLaunched
+import com.simplemobiletools.commons.extensions.*
-import com.simplemobiletools.commons.extensions.beVisible
-import com.simplemobiletools.commons.extensions.realScreenSize
 import com.simplemobiletools.launcher.BuildConfig
 import com.simplemobiletools.launcher.R
 import com.simplemobiletools.launcher.fragments.AllAppsFragment
@@ -105,6 +106,30 @@ class MainActivity : SimpleActivity(), FlingListener {
         }
     }
 
+    fun homeScreenLongPressed(x: Float, y: Float) {
+        main_holder.performHapticFeedback()
+
+        popup_menu_anchor.x = x
+        popup_menu_anchor.y = y - resources.getDimension(R.dimen.long_press_anchor_offset_y)
+        val contextTheme = ContextThemeWrapper(this, getPopupMenuTheme())
+        PopupMenu(contextTheme, popup_menu_anchor, Gravity.TOP or Gravity.END).apply {
+            inflate(R.menu.menu_home_screen)
+            setOnMenuItemClickListener { item ->
+                when (item.itemId) {
+                    R.id.widgets -> {
+                        showWidgetsFragment()
+                    }
+                }
+                true
+            }
+            show()
+        }
+    }
+
+    private fun showWidgetsFragment() {
+
+    }
+
     private class MyGestureListener(private val flingListener: FlingListener) : GestureDetector.SimpleOnGestureListener() {
         override fun onFling(event1: MotionEvent, event2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
             if (velocityY > 0) {
@@ -114,6 +139,10 @@ class MainActivity : SimpleActivity(), FlingListener {
             }
             return true
         }
+
+        override fun onLongPress(event: MotionEvent) {
+            (flingListener as MainActivity).homeScreenLongPressed(event.x, event.y)
+        }
     }
 
     override fun onFlingUp() {

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

@@ -2,11 +2,17 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/main_holder"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="match_parent">
 
     <include
         android:id="@+id/all_apps_fragment"
         layout="@layout/all_apps_fragment"
         android:visibility="gone" />
 
+    <View
+        android:id="@+id/popup_menu_anchor"
+        android:layout_width="1dp"
+        android:layout_height="1dp"
+        android:visibility="gone" />
+
 </RelativeLayout>

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

@@ -0,0 +1,9 @@
+<?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/widgets"
+        android:icon="@mipmap/ic_launcher"
+        android:title="@string/widgets"
+        app:showAsAction="always" />
+</menu>

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

@@ -1,3 +1,4 @@
 <resources>
     <dimen name="launcher_icon_size">55dp</dimen>
+    <dimen name="long_press_anchor_offset_y">70dp</dimen>
 </resources>