Added now playnig queue

app/src/main/java/code/name/monkey/retromusic/fragments/mainactivity/LibraryFragment.java

@@ -136,6 +136,9 @@ public class LibraryFragment extends AbsMainActivityFragment implements CabHolde
             case R.id.action_genre:
                 selectedFragment(GenresFragment.Companion.newInstance());
                 break;
+            case R.id.action_playing_queue:
+                selectedFragment(PlayingQueueFragment.Companion.newInstance());
+                break;
         }
     }
 

app/src/main/java/code/name/monkey/retromusic/fragments/mainactivity/PlayingQueueFragment.kt

@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2019 Hemanth Savarala.
+ *
+ * Licensed under the GNU General Public License v3
+ *
+ * This is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by
+ *  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
+ *
+ * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ */
+package code.name.monkey.retromusic.fragments.mainactivity
+
+import android.os.Bundle
+import android.view.View
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import code.name.monkey.retromusic.R
+import code.name.monkey.retromusic.adapter.song.PlayingQueueAdapter
+import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewFragment
+import code.name.monkey.retromusic.helper.MusicPlayerRemote
+import code.name.monkey.retromusic.util.ViewUtil
+import com.h6ah4i.android.widget.advrecyclerview.animator.RefactoredDefaultItemAnimator
+import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropManager
+import com.h6ah4i.android.widget.advrecyclerview.utils.WrapperAdapterUtils
+import kotlinx.android.synthetic.main.activity_playing_queue.*
+
+/**
+ * Created by hemanths on 2019-12-08.
+ */
+class PlayingQueueFragment : AbsLibraryPagerRecyclerViewFragment<PlayingQueueAdapter, LinearLayoutManager>() {
+
+    private var wrappedAdapter: RecyclerView.Adapter<*>? = null
+    private var recyclerViewDragDropManager: RecyclerViewDragDropManager? = null
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        setupRecyclerView()
+    }
+
+    private fun setupRecyclerView() {
+        recyclerViewDragDropManager = RecyclerViewDragDropManager()
+        val animator = RefactoredDefaultItemAnimator()
+
+        wrappedAdapter = recyclerViewDragDropManager?.createWrappedAdapter(createAdapter())
+
+
+        recyclerView.apply {
+            layoutManager = createLayoutManager()
+            adapter = wrappedAdapter
+            itemAnimator = animator
+            recyclerViewDragDropManager?.attachRecyclerView(this)
+        }
+        createLayoutManager().scrollToPositionWithOffset(MusicPlayerRemote.position + 1, 0)
+        ViewUtil.setUpFastScrollRecyclerViewColor(requireContext(), recyclerView)
+    }
+
+    override fun createLayoutManager(): LinearLayoutManager {
+        return LinearLayoutManager(requireContext())
+    }
+
+    override fun createAdapter(): PlayingQueueAdapter {
+        return PlayingQueueAdapter(requireActivity() as AppCompatActivity, MusicPlayerRemote.playingQueue, MusicPlayerRemote.position, R.layout.item_queue)
+    }
+
+    override fun onQueueChanged() {
+        super.onQueueChanged()
+        updateQueue()
+    }
+
+    override fun onPlayingMetaChanged() {
+        updateQueuePosition()
+    }
+
+    private fun updateQueuePosition() {
+        adapter?.setCurrent(MusicPlayerRemote.position)
+        resetToCurrentPosition()
+    }
+
+    private fun updateQueue() {
+        adapter?.swapDataSet(MusicPlayerRemote.playingQueue, MusicPlayerRemote.position)
+        resetToCurrentPosition()
+    }
+
+    private fun resetToCurrentPosition() {
+        recyclerView.stopScroll()
+        createLayoutManager().scrollToPositionWithOffset(MusicPlayerRemote.position + 1, 0)
+    }
+
+    override fun onPause() {
+        recyclerViewDragDropManager?.cancelDrag()
+        super.onPause()
+    }
+
+    override val emptyMessage: Int
+        get() = R.string.no_playing_queue
+
+    override fun onDestroyView() {
+        super.onDestroyView()
+        if (recyclerViewDragDropManager != null) {
+            recyclerViewDragDropManager!!.release()
+            recyclerViewDragDropManager = null
+        }
+
+        if (wrappedAdapter != null) {
+            WrapperAdapterUtils.releaseAll(wrappedAdapter)
+            wrappedAdapter = null
+        }
+    }
+
+    companion object {
+        @JvmField
+        val TAG: String = PlayingQueueFragment::class.java.simpleName
+
+        fun newInstance(): PlayingQueueFragment {
+            return PlayingQueueFragment()
+        }
+    }
+}