WIP Removing library fragment

app/src/main/java/code/name/monkey/retromusic/activities/MainActivity.kt

@@ -1,33 +1,66 @@
 package code.name.monkey.retromusic.activities
 
+import android.app.ActivityOptions
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
 import android.content.SharedPreferences
+import android.content.res.ColorStateList
+import android.graphics.Color
 import android.os.Bundle
 import android.provider.MediaStore
 import android.util.Log
+import android.view.Menu
+import android.view.MenuItem
+import android.view.SubMenu
 import android.view.View
 import androidx.core.app.ActivityCompat
 import androidx.fragment.app.Fragment
+import code.name.monkey.appthemehelper.util.ATHUtil
+import code.name.monkey.appthemehelper.util.ATHUtil.resolveColor
 import code.name.monkey.retromusic.R
+import code.name.monkey.retromusic.R.drawable
+import code.name.monkey.retromusic.R.id
+import code.name.monkey.retromusic.R.layout
+import code.name.monkey.retromusic.R.string
 import code.name.monkey.retromusic.activities.base.AbsSlidingMusicPanelActivity
+import code.name.monkey.retromusic.dialogs.CreatePlaylistDialog.Companion.create
+import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewCustomGridSizeFragment
+import code.name.monkey.retromusic.fragments.mainactivity.AlbumsFragment
+import code.name.monkey.retromusic.fragments.mainactivity.ArtistsFragment
+import code.name.monkey.retromusic.fragments.mainactivity.GenresFragment
 import code.name.monkey.retromusic.fragments.mainactivity.LibraryFragment
+import code.name.monkey.retromusic.fragments.mainactivity.PlayingQueueFragment
+import code.name.monkey.retromusic.fragments.mainactivity.PlaylistsFragment
+import code.name.monkey.retromusic.fragments.mainactivity.SongsFragment
 import code.name.monkey.retromusic.fragments.mainactivity.folders.FoldersFragment
 import code.name.monkey.retromusic.fragments.mainactivity.home.BannerHomeFragment
 import code.name.monkey.retromusic.helper.MusicPlayerRemote
 import code.name.monkey.retromusic.helper.SearchQueryHelper
+import code.name.monkey.retromusic.helper.SortOrder.AlbumSortOrder
+import code.name.monkey.retromusic.helper.SortOrder.ArtistSortOrder
+import code.name.monkey.retromusic.helper.SortOrder.SongSortOrder
+import code.name.monkey.retromusic.interfaces.CabHolder
 import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.loaders.AlbumLoader
 import code.name.monkey.retromusic.loaders.ArtistLoader
 import code.name.monkey.retromusic.loaders.PlaylistSongsLoader
 import code.name.monkey.retromusic.service.MusicService
 import code.name.monkey.retromusic.util.AppRater
+import code.name.monkey.retromusic.util.NavigationUtil
 import code.name.monkey.retromusic.util.PreferenceUtil
+import code.name.monkey.retromusic.util.RetroColorUtil
+import code.name.monkey.retromusic.util.RetroUtil
+import com.afollestad.materialcab.MaterialCab
+import com.afollestad.materialcab.MaterialCab.Callback
+import com.google.android.material.appbar.AppBarLayout.OnOffsetChangedListener
+import kotlinx.android.synthetic.main.activity_main_content.appBarLayout
+import kotlinx.android.synthetic.main.activity_main_content.toolbar
+import kotlinx.android.synthetic.main.activity_main_content.toolbarContainer
 import java.util.ArrayList
 
-class MainActivity : AbsSlidingMusicPanelActivity(), SharedPreferences.OnSharedPreferenceChangeListener {
+class MainActivity : AbsSlidingMusicPanelActivity(), CabHolder, SharedPreferences.OnSharedPreferenceChangeListener {
 
     private lateinit var currentFragment: MainActivityFragmentCallbacks
 
@@ -71,6 +104,23 @@ class MainActivity : AbsSlidingMusicPanelActivity(), SharedPreferences.OnSharedP
 
         checkShowChangelog()
         AppRater.appLaunched(this)
+        setupToolbar()
+        setBottomBarVisibility(View.VISIBLE)
+    }
+
+    private fun setupToolbar() {
+        toolbar.setBackgroundColor(Color.TRANSPARENT)
+        toolbarContainer.backgroundTintList =
+            ColorStateList.valueOf(resolveColor(this, R.attr.colorSurface))
+        setSupportActionBar(toolbar)
+        toolbar.setOnClickListener {
+            val options = ActivityOptions
+                .makeSceneTransitionAnimation(
+                    this, toolbarContainer,
+                    getString(R.string.transition_toolbar)
+                )
+            NavigationUtil.goToSearch(this, options)
+        }
     }
 
     private fun checkShowChangelog() {
@@ -238,12 +288,12 @@ class MainActivity : AbsSlidingMusicPanelActivity(), SharedPreferences.OnSharedP
 
     private fun selectedFragment(itemId: Int) {
         when (itemId) {
-            R.id.action_album,
+            R.id.action_album -> setCurrentFragment(AlbumsFragment.newInstance(), itemId.toString())
-            R.id.action_artist,
+            R.id.action_artist -> setCurrentFragment(ArtistsFragment.newInstance(), itemId.toString())
-            R.id.action_playlist,
+            R.id.action_playlist -> setCurrentFragment(PlaylistsFragment.newInstance(), itemId.toString())
-            R.id.action_genre,
+            R.id.action_genre -> setCurrentFragment(GenresFragment.newInstance(), itemId.toString())
-            R.id.action_playing_queue,
+            R.id.action_playing_queue -> setCurrentFragment(PlayingQueueFragment.newInstance(), itemId.toString())
-            R.id.action_song -> setCurrentFragment(LibraryFragment.newInstance(itemId), itemId.toString())
+            R.id.action_song -> setCurrentFragment(SongsFragment.newInstance(), itemId.toString())
             R.id.action_home -> setCurrentFragment(BannerHomeFragment.newInstance(), BannerHomeFragment.TAG)
             else -> {
                 setCurrentFragment(BannerHomeFragment.newInstance(), BannerHomeFragment.TAG)
@@ -269,4 +319,286 @@ class MainActivity : AbsSlidingMusicPanelActivity(), SharedPreferences.OnSharedP
         private const val REQUEST_CODE_THEME = 9002
         private const val PURCHASE_REQUEST = 101
     }
+
+    private lateinit var cab: MaterialCab
+
+    fun getTotalAppBarScrollingRange(): Int {
+        return appBarLayout.totalScrollRange
+    }
+
+    fun addOnAppBarOffsetChangedListener(
+        onOffsetChangedListener: OnOffsetChangedListener
+    ) {
+        appBarLayout.addOnOffsetChangedListener(onOffsetChangedListener)
+    }
+
+    fun removeOnAppBarOffsetChangedListener(
+        onOffsetChangedListener: OnOffsetChangedListener
+    ) {
+        appBarLayout.removeOnOffsetChangedListener(onOffsetChangedListener)
+    }
+
+    override fun openCab(menuRes: Int, callback: Callback): MaterialCab {
+        if (cab != null && cab.isActive()) {
+            cab.finish()
+        }
+
+        cab = MaterialCab(this, R.id.cab_stub)
+            .setMenu(menuRes)
+            .setCloseDrawableRes(R.drawable.ic_close_white_24dp)
+            .setBackgroundColor(
+                RetroColorUtil.shiftBackgroundColorForLightText(
+                    ATHUtil.resolveColor(this, R.attr.colorSurface)
+                )
+            )
+            .start(callback)
+        return cab
+    }
+
+    private fun getCurrentFragment(): Fragment? {
+        return if (supportFragmentManager == null) {
+            SongsFragment.newInstance()
+        } else supportFragmentManager.findFragmentByTag(LibraryFragment.TAG)
+    }
+
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        menuInflater.inflate(R.menu.menu_main, menu)
+        val currentFragment: Fragment? = getCurrentFragment()
+        if (currentFragment is AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>
+            && currentFragment.isAdded()
+        ) {
+
+            if (currentFragment is SongsFragment) {
+                menu!!.removeItem(id.action_grid_size)
+                menu.removeItem(id.action_layout_type)
+            } else {
+                val gridSizeItem = menu!!.findItem(id.action_grid_size)
+                if (RetroUtil.isLandscape()) {
+                    gridSizeItem.setTitle(string.action_grid_size_land)
+                }
+                setUpGridSizeMenu(currentFragment, gridSizeItem.subMenu)
+                val layoutItem = menu.findItem(id.action_layout_type)
+                setupLayoutMenu(currentFragment, layoutItem.subMenu)
+            }
+            setUpSortOrderMenu(currentFragment, menu.findItem(id.action_sort_order).subMenu)
+        } else if (currentFragment is GenresFragment || currentFragment is PlayingQueueFragment) {
+            menu!!.removeItem(id.action_new_playlist)
+            menu.removeItem(id.action_layout_type)
+            menu.removeItem(id.action_grid_size)
+            menu.removeItem(id.action_sort_order)
+        } else {
+            menu!!.add(0, id.action_new_playlist, 0, string.new_playlist_title)
+                .setIcon(drawable.ic_playlist_add_white_24dp)
+                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM)
+            menu.removeItem(id.action_grid_size)
+            menu.removeItem(id.action_layout_type)
+        }
+        return super.onCreateOptionsMenu(menu)
+    }
+
+    private fun setUpGridSizeMenu(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>,
+        gridSizeMenu: SubMenu
+    ) {
+        when (fragment.getGridSize()) {
+            1 -> gridSizeMenu.findItem(id.action_grid_size_1).isChecked = true
+            2 -> gridSizeMenu.findItem(id.action_grid_size_2).isChecked = true
+            3 -> gridSizeMenu.findItem(id.action_grid_size_3).isChecked = true
+            4 -> gridSizeMenu.findItem(id.action_grid_size_4).isChecked = true
+            5 -> gridSizeMenu.findItem(id.action_grid_size_5).isChecked = true
+            6 -> gridSizeMenu.findItem(id.action_grid_size_6).isChecked = true
+            7 -> gridSizeMenu.findItem(id.action_grid_size_7).isChecked = true
+            8 -> gridSizeMenu.findItem(id.action_grid_size_8).isChecked = true
+        }
+        val maxGridSize = fragment.maxGridSize
+        if (maxGridSize < 8) {
+            gridSizeMenu.findItem(id.action_grid_size_8).isVisible = false
+        }
+        if (maxGridSize < 7) {
+            gridSizeMenu.findItem(id.action_grid_size_7).isVisible = false
+        }
+        if (maxGridSize < 6) {
+            gridSizeMenu.findItem(id.action_grid_size_6).isVisible = false
+        }
+        if (maxGridSize < 5) {
+            gridSizeMenu.findItem(id.action_grid_size_5).isVisible = false
+        }
+        if (maxGridSize < 4) {
+            gridSizeMenu.findItem(id.action_grid_size_4).isVisible = false
+        }
+        if (maxGridSize < 3) {
+            gridSizeMenu.findItem(id.action_grid_size_3).isVisible = false
+        }
+    }
+
+    private fun setUpSortOrderMenu(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>,
+        sortOrderMenu: SubMenu
+    ) {
+        val currentSortOrder = fragment.getSortOrder()
+        sortOrderMenu.clear()
+        when (fragment) {
+            is AlbumsFragment -> {
+                sortOrderMenu.add(0, id.action_album_sort_order_asc, 0, string.sort_order_a_z).isChecked =
+                    currentSortOrder == AlbumSortOrder.ALBUM_A_Z
+                sortOrderMenu.add(0, id.action_album_sort_order_desc, 1, string.sort_order_z_a).isChecked =
+                    currentSortOrder == AlbumSortOrder.ALBUM_Z_A
+                sortOrderMenu.add(0, id.action_album_sort_order_artist, 2, string.sort_order_artist).isChecked =
+                    currentSortOrder == AlbumSortOrder.ALBUM_ARTIST
+                sortOrderMenu.add(0, id.action_album_sort_order_year, 3, string.sort_order_year).isChecked =
+                    currentSortOrder == AlbumSortOrder.ALBUM_YEAR
+            }
+            is ArtistsFragment -> {
+                sortOrderMenu.add(0, id.action_artist_sort_order_asc, 0, string.sort_order_a_z).isChecked =
+                    currentSortOrder == ArtistSortOrder.ARTIST_A_Z
+                sortOrderMenu.add(0, id.action_artist_sort_order_desc, 1, string.sort_order_z_a).isChecked =
+                    currentSortOrder == ArtistSortOrder.ARTIST_Z_A
+            }
+            is SongsFragment -> {
+                sortOrderMenu.add(0, id.action_song_sort_order_asc, 0, string.sort_order_a_z).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_A_Z
+                sortOrderMenu.add(0, id.action_song_sort_order_desc, 1, string.sort_order_z_a).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_Z_A
+                sortOrderMenu.add(0, id.action_song_sort_order_artist, 2, string.sort_order_artist).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_ARTIST
+                sortOrderMenu.add(0, id.action_song_sort_order_album, 3, string.sort_order_album).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_ALBUM
+                sortOrderMenu.add(0, id.action_song_sort_order_year, 4, string.sort_order_year).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_YEAR
+                sortOrderMenu.add(0, id.action_song_sort_order_date, 5, string.sort_order_date).isChecked =
+                    currentSortOrder == SongSortOrder.SONG_DATE
+                sortOrderMenu.add(0, id.action_song_sort_order_composer, 6, string.sort_order_composer).isChecked =
+                    currentSortOrder == SongSortOrder.COMPOSER
+            }
+        }
+        sortOrderMenu.setGroupCheckable(0, true, true)
+    }
+
+    private fun setupLayoutMenu(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>,
+        subMenu: SubMenu
+    ) {
+        when (fragment.itemLayoutRes()) {
+            layout.item_card -> subMenu.findItem(id.action_layout_card).isChecked = true
+            layout.item_grid -> subMenu.findItem(id.action_layout_normal).isChecked = true
+            layout.item_card_color -> subMenu.findItem(id.action_layout_colored_card).isChecked = true
+            layout.item_grid_circle -> subMenu.findItem(id.action_layout_circular).isChecked = true
+            layout.image -> subMenu.findItem(id.action_layout_image).isChecked = true
+            layout.item_image_gradient -> subMenu.findItem(id.action_layout_gradient_image).isChecked = true
+        }
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        //if (pager == null) return false;
+        val currentFragment = getCurrentFragment()
+        if (currentFragment is AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>) {
+            if (handleGridSizeMenuItem(currentFragment, item)) {
+                return true
+            }
+            if (handleLayoutResType(currentFragment, item)) {
+                return true
+            }
+            if (handleSortOrderMenuItem(currentFragment, item)) {
+                return true
+            }
+        }
+        when (item.itemId) {
+            R.id.action_search -> {
+                val options = ActivityOptions
+                    .makeSceneTransitionAnimation(
+                        this, toolbarContainer,
+                        getString(string.transition_toolbar)
+                    )
+                NavigationUtil.goToSearch(this, options)
+            }
+            R.id.action_new_playlist -> {
+                create().show(supportFragmentManager, "CREATE_PLAYLIST")
+                return true
+            }
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+    private fun handleGridSizeMenuItem(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>,
+        item: MenuItem
+    ): Boolean {
+        var gridSize = 0
+        when (item.itemId) {
+            id.action_grid_size_1 -> gridSize = 1
+            id.action_grid_size_2 -> gridSize = 2
+            id.action_grid_size_3 -> gridSize = 3
+            id.action_grid_size_4 -> gridSize = 4
+            id.action_grid_size_5 -> gridSize = 5
+            id.action_grid_size_6 -> gridSize = 6
+            id.action_grid_size_7 -> gridSize = 7
+            id.action_grid_size_8 -> gridSize = 8
+        }
+        if (gridSize > 0) {
+            item.isChecked = true
+            fragment.setAndSaveGridSize(gridSize)
+            return true
+        }
+        return false
+    }
+
+    private fun handleLayoutResType(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>,
+        item: MenuItem
+    ): Boolean {
+        var layoutRes = -1
+        when (item.itemId) {
+            id.action_layout_normal -> layoutRes = layout.item_grid
+            id.action_layout_card -> layoutRes = layout.item_card
+            id.action_layout_colored_card -> layoutRes = layout.item_card_color
+            id.action_layout_circular -> layoutRes = layout.item_grid_circle
+            id.action_layout_image -> layoutRes = layout.image
+            id.action_layout_gradient_image -> layoutRes = layout.item_image_gradient
+        }
+        if (layoutRes != -1) {
+            item.isChecked = true
+            fragment.setAndSaveLayoutRes(layoutRes)
+            return true
+        }
+        return false
+    }
+
+    private fun handleSortOrderMenuItem(
+        fragment: AbsLibraryPagerRecyclerViewCustomGridSizeFragment<*, *>, item: MenuItem
+    ): Boolean {
+        var sortOrder: String? = null
+        when (fragment) {
+            is SongsFragment -> {
+                when (item.itemId) {
+                    id.action_song_sort_order_asc -> sortOrder = SongSortOrder.SONG_A_Z
+                    id.action_song_sort_order_desc -> sortOrder = SongSortOrder.SONG_Z_A
+                    id.action_song_sort_order_artist -> sortOrder = SongSortOrder.SONG_ARTIST
+                    id.action_song_sort_order_album -> sortOrder = SongSortOrder.SONG_ALBUM
+                    id.action_song_sort_order_year -> sortOrder = SongSortOrder.SONG_YEAR
+                    id.action_song_sort_order_date -> sortOrder = SongSortOrder.SONG_DATE
+                    id.action_song_sort_order_composer -> sortOrder = SongSortOrder.COMPOSER
+                }
+            }
+            is AlbumsFragment -> {
+                when (item.itemId) {
+                    id.action_album_sort_order_asc -> sortOrder = AlbumSortOrder.ALBUM_A_Z
+                    id.action_album_sort_order_desc -> sortOrder = AlbumSortOrder.ALBUM_Z_A
+                    id.action_album_sort_order_artist -> sortOrder = AlbumSortOrder.ALBUM_ARTIST
+                    id.action_album_sort_order_year -> sortOrder = AlbumSortOrder.ALBUM_YEAR
+                }
+            }
+            is ArtistsFragment -> {
+                when (item.itemId) {
+                    id.action_artist_sort_order_asc -> sortOrder = ArtistSortOrder.ARTIST_A_Z
+                    id.action_artist_sort_order_desc -> sortOrder = ArtistSortOrder.ARTIST_Z_A
+                }
+            }
+        }
+        if (sortOrder != null) {
+            item.isChecked = true
+            fragment.setAndSaveSortOrder(sortOrder)
+            return true
+        }
+        return false
+    }
 }

app/src/main/java/code/name/monkey/retromusic/fragments/base/AbsLibraryPagerFragment.kt

@@ -1,13 +1,12 @@
 package code.name.monkey.retromusic.fragments.base
 
 import android.os.Bundle
-import code.name.monkey.retromusic.fragments.mainactivity.LibraryFragment
+import code.name.monkey.retromusic.activities.MainActivity
 
 open class AbsLibraryPagerFragment : AbsMusicServiceFragment() {
 
-
+    val mainActivity: MainActivity
-    val libraryFragment: LibraryFragment
+        get() = requireActivity() as MainActivity
-        get() = parentFragment as LibraryFragment
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         super.onActivityCreated(savedInstanceState)

app/src/main/java/code/name/monkey/retromusic/fragments/base/AbsLibraryPagerRecyclerViewFragment.kt

@@ -35,7 +35,7 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        libraryFragment.addOnAppBarOffsetChangedListener(this)
+        mainActivity.addOnAppBarOffsetChangedListener(this)
         initLayoutManager()
         initAdapter()
         setUpRecyclerView()
@@ -109,7 +109,7 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
             container.paddingLeft,
             container.paddingTop,
             container.paddingRight,
-            libraryFragment.totalAppBarScrollingRange + i
+            mainActivity.getTotalAppBarScrollingRange() + i
         )
     }
 
@@ -136,7 +136,7 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
 
     override fun onDestroyView() {
         super.onDestroyView()
-        libraryFragment.removeOnAppBarOffsetChangedListener(this)
+        mainActivity.removeOnAppBarOffsetChangedListener(this)
     }
 
     fun recyclerView(): RecyclerView {

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

@@ -7,6 +7,7 @@ import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.album.AlbumAdapter
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewCustomGridSizeFragment
+import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.model.Album
 import code.name.monkey.retromusic.mvp.presenter.AlbumsPresenter
 import code.name.monkey.retromusic.mvp.presenter.AlbumsView
@@ -14,7 +15,7 @@ import code.name.monkey.retromusic.util.PreferenceUtil
 import javax.inject.Inject
 
 class AlbumsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<AlbumAdapter, GridLayoutManager>(),
-    AlbumsView {
+    AlbumsView, MainActivityFragmentCallbacks {
 
     @Inject
     lateinit var albumsPresenter: AlbumsPresenter
@@ -49,16 +50,16 @@ class AlbumsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<AlbumAd
         get() = R.string.no_albums
 
     override fun createLayoutManager(): GridLayoutManager {
-        return GridLayoutManager(activity, getGridSize())
+        return GridLayoutManager(requireActivity(), getGridSize())
     }
 
     override fun createAdapter(): AlbumAdapter {
         val dataSet = if (adapter == null) ArrayList() else adapter!!.dataSet
         return AlbumAdapter(
-            libraryFragment.mainActivity,
+            mainActivity,
             dataSet,
             itemLayoutRes(),
-            libraryFragment
+            mainActivity
         )
     }
 
@@ -125,4 +126,8 @@ class AlbumsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<AlbumAd
             return fragment
         }
     }
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
 }

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

@@ -7,6 +7,7 @@ import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.artist.ArtistAdapter
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewCustomGridSizeFragment
+import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.model.Artist
 import code.name.monkey.retromusic.mvp.presenter.ArtistsPresenter
 import code.name.monkey.retromusic.mvp.presenter.ArtistsView
@@ -14,7 +15,11 @@ import code.name.monkey.retromusic.util.PreferenceUtil
 import javax.inject.Inject
 
 class ArtistsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<ArtistAdapter, GridLayoutManager>(),
-    ArtistsView {
+    ArtistsView, MainActivityFragmentCallbacks {
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
 
     override fun artists(artists: List<Artist>) {
         adapter?.swapDataSet(artists)
@@ -57,21 +62,21 @@ class ArtistsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<Artist
     }
 
     override fun createLayoutManager(): GridLayoutManager {
-        return GridLayoutManager(activity, getGridSize())
+        return GridLayoutManager(requireActivity(), getGridSize())
     }
 
     override fun createAdapter(): ArtistAdapter {
         val dataSet = if (adapter == null) ArrayList() else adapter!!.dataSet
         return ArtistAdapter(
-            libraryFragment.mainActivity,
+            mainActivity,
             dataSet,
             itemLayoutRes(),
-            libraryFragment
+            mainActivity
         )
     }
 
     override fun loadGridSize(): Int {
-        return PreferenceUtil.getInstance(requireContext()).getArtistGridSize(activity!!)
+        return PreferenceUtil.getInstance(requireContext()).getArtistGridSize(requireActivity())
     }
 
     override fun saveGridSize(gridColumns: Int) {
@@ -79,7 +84,7 @@ class ArtistsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<Artist
     }
 
     override fun loadGridSizeLand(): Int {
-        return PreferenceUtil.getInstance(requireContext()).getArtistGridSizeLand(activity!!)
+        return PreferenceUtil.getInstance(requireContext()).getArtistGridSizeLand(requireActivity())
     }
 
     override fun saveGridSizeLand(gridColumns: Int) {

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

@@ -21,12 +21,19 @@ import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.GenreAdapter
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewFragment
+import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.model.Genre
 import code.name.monkey.retromusic.mvp.presenter.GenresPresenter
 import code.name.monkey.retromusic.mvp.presenter.GenresView
 import javax.inject.Inject
 
-class GenresFragment : AbsLibraryPagerRecyclerViewFragment<GenreAdapter, LinearLayoutManager>(), GenresView {
+class GenresFragment : AbsLibraryPagerRecyclerViewFragment<GenreAdapter, LinearLayoutManager>(),
+    GenresView, MainActivityFragmentCallbacks {
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
+
     override fun genres(genres: List<Genre>) {
         adapter?.swapDataSet(genres)
     }
@@ -40,7 +47,7 @@ class GenresFragment : AbsLibraryPagerRecyclerViewFragment<GenreAdapter, LinearL
 
     override fun createAdapter(): GenreAdapter {
         val dataSet = if (adapter == null) ArrayList() else adapter!!.dataSet
-        return GenreAdapter(libraryFragment.mainActivity, dataSet, R.layout.item_list_no_image)
+        return GenreAdapter(mainActivity, dataSet, R.layout.item_list_no_image)
     }
 
     override val emptyMessage: Int

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

@@ -22,6 +22,7 @@ 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.interfaces.MainActivityFragmentCallbacks
 import com.h6ah4i.android.widget.advrecyclerview.animator.DraggableItemAnimator
 import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropManager
 import com.h6ah4i.android.widget.advrecyclerview.swipeable.RecyclerViewSwipeManager
@@ -32,7 +33,12 @@ import kotlinx.android.synthetic.main.activity_playing_queue.recyclerView
 /**
  * Created by hemanths on 2019-12-08.
  */
-class PlayingQueueFragment : AbsLibraryPagerRecyclerViewFragment<PlayingQueueAdapter, LinearLayoutManager>() {
+class PlayingQueueFragment : AbsLibraryPagerRecyclerViewFragment<PlayingQueueAdapter, LinearLayoutManager>(),
+    MainActivityFragmentCallbacks {
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
 
     private lateinit var wrappedAdapter: RecyclerView.Adapter<*>
     private var recyclerViewDragDropManager: RecyclerViewDragDropManager? = null

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

@@ -9,12 +9,18 @@ import code.name.monkey.retromusic.App
 import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.playlist.PlaylistAdapter
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewFragment
+import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.model.Playlist
 import code.name.monkey.retromusic.mvp.presenter.PlaylistView
 import code.name.monkey.retromusic.mvp.presenter.PlaylistsPresenter
 import javax.inject.Inject
 
-class PlaylistsFragment : AbsLibraryPagerRecyclerViewFragment<PlaylistAdapter, LinearLayoutManager>(), PlaylistView {
+class PlaylistsFragment : AbsLibraryPagerRecyclerViewFragment<PlaylistAdapter, LinearLayoutManager>(), PlaylistView,
+    MainActivityFragmentCallbacks {
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
 
     @Inject
     lateinit var playlistsPresenter: PlaylistsPresenter
@@ -38,8 +44,10 @@ class PlaylistsFragment : AbsLibraryPagerRecyclerViewFragment<PlaylistAdapter, L
 
     override fun createAdapter(): PlaylistAdapter {
         return PlaylistAdapter(
-            libraryFragment.mainActivity, ArrayList(),
+            mainActivity,
-            R.layout.item_list, libraryFragment
+            ArrayList(),
+            R.layout.item_list,
+            mainActivity
         )
     }
 

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

@@ -9,6 +9,7 @@ import code.name.monkey.retromusic.R
 import code.name.monkey.retromusic.adapter.song.ShuffleButtonSongAdapter
 import code.name.monkey.retromusic.adapter.song.SongAdapter
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewCustomGridSizeFragment
+import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks
 import code.name.monkey.retromusic.model.Song
 import code.name.monkey.retromusic.mvp.presenter.SongPresenter
 import code.name.monkey.retromusic.mvp.presenter.SongView
@@ -17,7 +18,7 @@ import java.util.ArrayList
 import javax.inject.Inject
 
 class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdapter, LinearLayoutManager>(),
-    SongView {
+    SongView, MainActivityFragmentCallbacks {
 
     @Inject
     lateinit var songPresenter: SongPresenter
@@ -36,16 +37,16 @@ class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdap
     }
 
     override fun createLayoutManager(): LinearLayoutManager {
-        return LinearLayoutManager(activity)
+        return LinearLayoutManager(requireActivity())
     }
 
     override fun createAdapter(): SongAdapter {
         val dataSet = if (adapter == null) mutableListOf() else adapter!!.dataSet
         return ShuffleButtonSongAdapter(
-            libraryFragment.mainActivity,
+            mainActivity,
             dataSet,
             R.layout.item_list,
-            libraryFragment
+            mainActivity
         )
     }
 
@@ -58,7 +59,7 @@ class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdap
     }
 
     override fun loadGridSize(): Int {
-        return PreferenceUtil.getInstance(requireContext()).getSongGridSize(activity!!)
+        return PreferenceUtil.getInstance(requireContext()).getSongGridSize(requireActivity())
     }
 
     override fun saveGridSize(gridColumns: Int) {
@@ -66,7 +67,7 @@ class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdap
     }
 
     override fun loadGridSizeLand(): Int {
-        return PreferenceUtil.getInstance(requireContext()).getSongGridSizeLand(activity!!)
+        return PreferenceUtil.getInstance(requireContext()).getSongGridSizeLand(requireActivity())
     }
 
     override fun saveGridSizeLand(gridColumns: Int) {
@@ -109,6 +110,7 @@ class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdap
         @JvmField
         var TAG: String = SongsFragment::class.java.simpleName
 
+        @JvmStatic
         fun newInstance(): SongsFragment {
             val args = Bundle()
             val fragment = SongsFragment()
@@ -127,4 +129,8 @@ class SongsFragment : AbsLibraryPagerRecyclerViewCustomGridSizeFragment<SongAdap
 
     override fun saveLayoutRes(@LayoutRes layoutRes: Int) {
     }
+
+    override fun handleBackPress(): Boolean {
+        return false
+    }
 }

app/src/main/java/code/name/monkey/retromusic/helper/SortOrder.kt

@@ -21,6 +21,7 @@ class SortOrder {
      * Artist sort order entries.
      */
     interface ArtistSortOrder {
+
         companion object {
 
             /* Artist sort order A-Z */
@@ -41,6 +42,7 @@ class SortOrder {
      * Album sort order entries.
      */
     interface AlbumSortOrder {
+
         companion object {
 
             /* Album sort order A-Z */
@@ -65,6 +67,7 @@ class SortOrder {
      * Song sort order entries.
      */
     interface SongSortOrder {
+
         companion object {
 
             /* Song sort order A-Z */
@@ -88,6 +91,9 @@ class SortOrder {
             /* Song sort order date */
             const val SONG_DATE = MediaStore.Audio.Media.DATE_ADDED + " DESC"
 
+            /* Song sort modified date */
+            const val SONG_MODIFIED = MediaStore.Audio.Media.DATE_MODIFIED + " DESC"
+
             /* Song sort order composer*/
             const val COMPOSER = MediaStore.Audio.Media.COMPOSER
         }
@@ -97,6 +103,7 @@ class SortOrder {
      * Album song sort order entries.
      */
     interface AlbumSongSortOrder {
+
         companion object {
 
             /* Album song sort order A-Z */
@@ -118,6 +125,7 @@ class SortOrder {
      * Artist song sort order entries.
      */
     interface ArtistSongSortOrder {
+
         companion object {
 
             /* Artist song sort order A-Z */
@@ -144,6 +152,7 @@ class SortOrder {
      * Artist album sort order entries.
      */
     interface ArtistAlbumSortOrder {
+
         companion object {
 
             /* Artist album sort order A-Z */
@@ -164,6 +173,7 @@ class SortOrder {
      * Genre sort order entries.
      */
     interface GenreSortOrder {
+
         companion object {
 
             /* Genre sort order A-Z */
@@ -173,5 +183,4 @@ class SortOrder {
             const val ALBUM_Z_A = "$GENRE_A_Z DESC"
         }
     }
-
 }

app/src/main/java/code/name/monkey/retromusic/interfaces/MainActivityFragmentCallbacks.kt

@@ -19,7 +19,6 @@ package code.name.monkey.retromusic.interfaces
  */
 
 interface MainActivityFragmentCallbacks {
-    fun handleBackPress(): Boolean
 
-    //void selectedFragment(Fragment fragment);
+    fun handleBackPress(): Boolean
 }

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

@@ -1,5 +1,71 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="?colorSurface"
+    android:orientation="vertical">
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:elevation="0dp"
+        tools:ignore="UnusedAttribute">
+
+        <include layout="@layout/status_bar" />
+
+    </FrameLayout>
+
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <com.google.android.material.appbar.AppBarLayout
+            android:id="@+id/appBarLayout"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@android:color/transparent"
+            android:elevation="0dp"
+            app:elevation="0dp"
+            app:liftOnScroll="true">
+
+            <com.google.android.material.card.MaterialCardView
+                android:id="@+id/toolbarContainer"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:cardCornerRadius="8dp"
+                app:cardUseCompatPadding="true"
+                app:layout_scrollFlags="scroll|enterAlways">
+
+                <FrameLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content">
+
+                    <androidx.appcompat.widget.Toolbar
+                        android:id="@+id/toolbar"
+                        android:layout_width="match_parent"
+                        android:layout_height="@dimen/toolbar_height"
+                        android:background="?colorSurface"
+                        app:navigationIcon="@drawable/ic_menu_white_24dp"
+                        app:popupTheme="?attr/toolbarPopupTheme"
+                        app:title="@string/action_search"
+                        app:titleTextAppearance="@style/TextViewHeadline6"
+                        app:titleTextColor="?android:attr/textColorSecondary"
+                        tools:ignore="UnusedAttribute" />
+
+                    <ViewStub
+                        android:id="@+id/cab_stub"
+                        android:layout_width="match_parent"
+                        android:layout_height="@dimen/toolbar_height" />
+                </FrameLayout>
+            </com.google.android.material.card.MaterialCardView>
+        </com.google.android.material.appbar.AppBarLayout>
+
+        <FrameLayout
             android:id="@+id/fragment_container"
             android:layout_width="match_parent"
-    android:layout_height="match_parent" />
+            android:layout_height="match_parent"
+            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
+    </androidx.coordinatorlayout.widget.CoordinatorLayout>
+</LinearLayout>