allow opening App info by long pressing an app icon

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

@@ -123,10 +123,10 @@ 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)
+        home_screen_popup_menu_anchor.x = x
+        home_screen_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 {
+        PopupMenu(contextTheme, home_screen_popup_menu_anchor, Gravity.TOP or Gravity.END).apply {
             inflate(R.menu.menu_home_screen)
             setOnMenuItemClickListener { item ->
                 when (item.itemId) {

app/src/main/kotlin/com/simplemobiletools/launcher/adapters/LaunchersAdapter.kt

@@ -12,6 +12,7 @@ import com.simplemobiletools.commons.extensions.realScreenSize
 import com.simplemobiletools.launcher.R
 import com.simplemobiletools.launcher.activities.SimpleActivity
 import com.simplemobiletools.launcher.extensions.getColumnCount
+import com.simplemobiletools.launcher.interfaces.AllAppsListener
 import com.simplemobiletools.launcher.models.AppLauncher
 import kotlinx.android.synthetic.main.item_launcher_label.view.*
 
@@ -19,6 +20,7 @@ class LaunchersAdapter(
     val activity: SimpleActivity,
     val launchers: ArrayList<AppLauncher>,
     val fastScroller: RecyclerViewFastScroller,
+    val allAppsListener: AllAppsListener,
     val itemClick: (Any) -> Unit
 ) : RecyclerView.Adapter<LaunchersAdapter.ViewHolder>(), RecyclerViewFastScroller.OnPopupTextUpdate {
 
@@ -60,6 +62,10 @@ class LaunchersAdapter(
                 launcher_icon.setImageDrawable(launcher.drawable!!)
                 launcher_icon.setPadding(iconPadding, iconPadding, iconPadding, 0)
                 setOnClickListener { itemClick(launcher) }
+                setOnLongClickListener { view ->
+                    allAppsListener.onIconLongPressed(view.x, view.y, launcher.packageName)
+                    true
+                }
             }
 
             if (!wasManualScrollPositionSet) {

app/src/main/kotlin/com/simplemobiletools/launcher/fragments/AllAppsFragment.kt

@@ -6,11 +6,12 @@ import android.content.Intent
 import android.content.pm.LauncherApps
 import android.content.pm.PackageManager
 import android.graphics.drawable.Drawable
+import android.net.Uri
 import android.os.Process
+import android.provider.Settings
 import android.util.AttributeSet
-import android.view.MotionEvent
-import android.view.Surface
-import android.view.WindowManager
+import android.view.*
+import android.widget.PopupMenu
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 import com.simplemobiletools.commons.helpers.isRPlus
@@ -19,10 +20,11 @@ import com.simplemobiletools.launcher.R
 import com.simplemobiletools.launcher.activities.MainActivity
 import com.simplemobiletools.launcher.adapters.LaunchersAdapter
 import com.simplemobiletools.launcher.extensions.getColumnCount
+import com.simplemobiletools.launcher.interfaces.AllAppsListener
 import com.simplemobiletools.launcher.models.AppLauncher
 import kotlinx.android.synthetic.main.all_apps_fragment.view.*
 
-class AllAppsFragment(context: Context, attributeSet: AttributeSet) : MyFragment(context, attributeSet) {
+class AllAppsFragment(context: Context, attributeSet: AttributeSet) : MyFragment(context, attributeSet), AllAppsListener {
     private var touchDownY = -1
 
     @SuppressLint("ClickableViewAccessibility")
@@ -114,7 +116,7 @@ class AllAppsFragment(context: Context, attributeSet: AttributeSet) : MyFragment
 
     private fun setupAdapter(launchers: ArrayList<AppLauncher>) {
         activity?.runOnUiThread {
-            LaunchersAdapter(activity!!, launchers, all_apps_fastscroller) {
+            LaunchersAdapter(activity!!, launchers, all_apps_fastscroller, this) {
                 val launchIntent = context.packageManager.getLaunchIntentForPackage((it as AppLauncher).packageName)
                 try {
                     activity!!.startActivity(launchIntent)
@@ -161,4 +163,29 @@ class AllAppsFragment(context: Context, attributeSet: AttributeSet) : MyFragment
         all_apps_grid.setPadding(0, 0, resources.getDimension(R.dimen.medium_margin).toInt(), bottomListPadding)
         all_apps_fastscroller.setPadding(leftListPadding, 0, rightListPadding, 0)
     }
+
+    override fun onIconLongPressed(x: Float, y: Float, packageName: String) {
+        all_apps_popup_menu_anchor.x = x
+        all_apps_popup_menu_anchor.y = y
+        val contextTheme = ContextThemeWrapper(activity, activity!!.getPopupMenuTheme())
+        PopupMenu(contextTheme, all_apps_popup_menu_anchor, Gravity.TOP or Gravity.END).apply {
+            inflate(R.menu.menu_app_icon)
+            setOnMenuItemClickListener { item ->
+                when (item.itemId) {
+                    R.id.app_info -> {
+                        launchAppInfo(packageName)
+                    }
+                }
+                true
+            }
+            show()
+        }
+    }
+
+    private fun launchAppInfo(packageName: String) {
+        Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+            data = Uri.fromParts("package", packageName, null)
+            activity?.startActivity(this)
+        }
+    }
 }

app/src/main/kotlin/com/simplemobiletools/launcher/interfaces/AllAppsListener.kt

@@ -0,0 +1,5 @@
+package com.simplemobiletools.launcher.interfaces
+
+interface AllAppsListener {
+    fun onIconLongPressed(x: Float, y: Float, packageName: String)
+}

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

@@ -15,7 +15,7 @@
         android:visibility="gone" />
 
     <View
-        android:id="@+id/popup_menu_anchor"
+        android:id="@+id/home_screen_popup_menu_anchor"
         android:layout_width="1dp"
         android:layout_height="1dp"
         android:visibility="gone" />

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

@@ -22,4 +22,11 @@
             app:spanCount="@integer/portrait_column_count" />
 
     </com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller>
+
+    <View
+        android:id="@+id/all_apps_popup_menu_anchor"
+        android:layout_width="1dp"
+        android:layout_height="1dp"
+        android:visibility="gone" />
+
 </com.simplemobiletools.launcher.fragments.AllAppsFragment>

app/src/main/res/menu/menu_app_icon.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/app_info"
+        android:icon="@drawable/ic_info_vector"
+        android:title="@string/app_info"
+        app:showAsAction="always" />
+</menu>

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

@@ -1,6 +1,7 @@
 <resources>
     <string name="app_name">Simple Launcher</string>
     <string name="app_launcher_name">Launcher</string>
+    <string name="app_info">App info</string>
     <string name="touch_hold_widget">Long press the widget and drag it on your home screen</string>
     <!--
         Haven't found some strings? There's more at