Added the options dialog

Added a MaterialAlertDialog with the "background mode" option,
needed to pass the childFragmentManager to display the alert.

app/src/main/java/com/github/libretube/Home.kt

@@ -80,7 +80,7 @@ class Home : Fragment() {
                 }
                 runOnUiThread {
                     progressBar.visibility = View.GONE
-                    recyclerView.adapter = TrendingAdapter(response)
+                    recyclerView.adapter = TrendingAdapter(response, childFragmentManager)
                 }
             }
         }

app/src/main/java/com/github/libretube/PlayerFragment.kt

@@ -476,7 +476,7 @@ class PlayerFragment : Fragment() {
                             }
                         }
                     })
-                    relatedRecView.adapter = TrendingAdapter(response.relatedStreams!!)
+                    relatedRecView.adapter = TrendingAdapter(response.relatedStreams!!, childFragmentManager)
                     view.findViewById<TextView>(R.id.player_description).text =
                         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                             Html.fromHtml(response.description, Html.FROM_HTML_MODE_COMPACT)

app/src/main/java/com/github/libretube/VideoOptionsDialog.kt

@@ -0,0 +1,42 @@
+package com.github.libretube
+
+import android.app.Dialog
+import android.os.Bundle
+import android.widget.ArrayAdapter
+import androidx.fragment.app.DialogFragment
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+
+class VideoOptionsDialog : DialogFragment() {
+    /**
+     * List that stores the different menu options.
+     */
+    private val list = arrayListOf("Background mode")
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        return MaterialAlertDialogBuilder(requireContext())
+            .setAdapter(
+                ArrayAdapter(
+                    requireContext(),
+                    R.layout.video_options_dialog_item,
+                    list
+                )
+            ) { _, which ->
+                // For now, this checks the position of the option with the position that is in the
+                // list. I don't like it, but we will do like this for now.
+                when (which) {
+                    // This for example will be the "Background mode" option
+                    1 -> {
+                        TODO("Implement the background mode option")
+                    }
+                    else -> {
+                        this.dismiss()
+                    }
+                }
+            }
+            .show()
+    }
+
+    companion object {
+        const val TAG = "VideoOptionsDialog"
+    }
+}

app/src/main/java/com/github/libretube/adapters/TrendingAdapter.kt

@@ -10,15 +10,19 @@ import android.widget.TextView
 import androidx.appcompat.app.AppCompatActivity
 import androidx.constraintlayout.motion.widget.MotionLayout
 import androidx.core.os.bundleOf
+import androidx.fragment.app.FragmentManager
 import androidx.recyclerview.widget.RecyclerView
-import com.github.libretube.MainActivity
+import com.github.libretube.*
 import com.squareup.picasso.Picasso
 import com.github.libretube.PlayerFragment
 import com.github.libretube.R
 import com.github.libretube.obj.StreamItem
 import com.github.libretube.formatShort
 
-class TrendingAdapter(private val videoFeed: List<StreamItem>): RecyclerView.Adapter<CustomViewHolder>() {
+class TrendingAdapter(
+    private val videoFeed: List<StreamItem>,
+    private val childFragmentManager: FragmentManager
+) : RecyclerView.Adapter<CustomViewHolder>() {
     override fun getItemCount(): Int {
         return videoFeed.size
     }
@@ -73,7 +77,10 @@ class TrendingAdapter(private val videoFeed: List<StreamItem>): RecyclerView.Ada
                 .replace(R.id.container, frag)
                 .commitNow()
         }
-        holder.v.setOnLongClickListener { TODO("Not yet implemented") }
+        holder.v.setOnLongClickListener {
+            VideoOptionsDialog().show(childFragmentManager, VideoOptionsDialog.TAG)
+            true
+        }
     }
 }
 class CustomViewHolder(val v: View): RecyclerView.ViewHolder(v){

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content">
+
+</TextView>