Add scroll helper

app/build.gradle

@@ -183,4 +183,5 @@ dependencies {
     implementation 'com.google.android.play:core:1.7.2'
     implementation 'me.jorgecastillo:androidcolorx:0.2.0'
     debugImplementation 'com.amitshekhar.android:debug-db:1.0.4'
+    implementation 'com.github.ologe:scroll-helper:2.0.0-beta01'
 }

app/src/main/java/code/name/monkey/retromusic/RetroScrollHelper.kt

@@ -0,0 +1,66 @@
+package code.name.monkey.retromusic
+
+import android.view.View
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import androidx.recyclerview.widget.RecyclerView
+import androidx.viewpager2.widget.ViewPager2
+import code.name.monkey.retromusic.fragments.player.normal.PlayerFragment
+import dev.olog.scrollhelper.ScrollHelper
+
+class RetroScrollHelper(
+    private val activity: FragmentActivity
+) : ScrollHelper(
+    activity,
+    true,
+    false // TODO when true, scrolls both bottomsheet and bottom navigation
+) {
+    private val skipFragment = listOf(
+        PlayerFragment::class.java.name
+    )
+
+    // TODO every fragment has to have it's unique tag in order to work correctly
+    //   here you can decide what fragment will be processed by the library
+    //   probably you want to skip player fragments, ecc ..
+    override fun shouldSkipFragment(fragment: Fragment): Boolean {
+        return fragment::class.java.name in skipFragment
+    }
+
+    override fun findBottomNavigation(): View? {
+        return activity.findViewById(R.id.bottomNavigationView)
+    }
+
+    override fun findBottomSheet(): View? {
+        return activity.findViewById(R.id.slidingPanel)
+    }
+
+    override fun findFab(fragment: Fragment): View? {
+        return null
+    }
+
+    override fun findRecyclerView(fragment: Fragment): RecyclerView? {
+        return fragment.requireView().findViewById(R.id.recyclerView)
+    }
+
+    override fun findToolbar(fragment: Fragment): View? {
+        return fragment.requireActivity().findViewById(R.id.toolbar)
+    }
+
+    override fun findTabLayout(fragment: Fragment): View? {
+        return null
+    }
+
+    override fun findViewPager(fragment: Fragment): ViewPager2? {
+        return null
+    }
+
+    // TODO override this if you want to apply custom padding
+    override fun updateRecyclerViewPadding(
+        fragment: Fragment,
+        recyclerView: RecyclerView,
+        topPadding: Int,
+        bottomPadding: Int
+    ) {
+        super.updateRecyclerViewPadding(fragment, recyclerView, topPadding, bottomPadding)
+    }
+}

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

@@ -39,7 +39,6 @@ import androidx.fragment.app.Fragment;
 
 import com.afollestad.materialcab.MaterialCab;
 import com.afollestad.materialcab.MaterialCab.Callback;
-import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.play.core.appupdate.AppUpdateInfo;
 import com.google.android.play.core.appupdate.AppUpdateManager;
@@ -61,14 +60,15 @@ import code.name.monkey.appthemehelper.ThemeStore;
 import code.name.monkey.appthemehelper.util.ATHUtil;
 import code.name.monkey.appthemehelper.util.ToolbarContentTintHelper;
 import code.name.monkey.retromusic.R;
+import code.name.monkey.retromusic.RetroScrollHelper;
 import code.name.monkey.retromusic.activities.base.AbsSlidingMusicPanelActivity;
 import code.name.monkey.retromusic.dialogs.CreatePlaylistDialog;
 import code.name.monkey.retromusic.fragments.albums.AlbumsFragment;
 import code.name.monkey.retromusic.fragments.artists.ArtistsFragment;
 import code.name.monkey.retromusic.fragments.base.AbsLibraryPagerRecyclerViewCustomGridSizeFragment;
+import code.name.monkey.retromusic.fragments.folder.FoldersFragment;
 import code.name.monkey.retromusic.fragments.genres.GenresFragment;
 import code.name.monkey.retromusic.fragments.home.BannerHomeFragment;
-import code.name.monkey.retromusic.fragments.mainactivity.FoldersFragment;
 import code.name.monkey.retromusic.fragments.playlists.PlaylistsFragment;
 import code.name.monkey.retromusic.fragments.queue.PlayingQueueFragment;
 import code.name.monkey.retromusic.fragments.songs.SongsFragment;
@@ -89,13 +89,13 @@ 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 dev.olog.scrollhelper.ScrollHelper;
 
 /**
  * Created by hemanths on 2020-02-19.
  */
 public class MainActivity extends AbsSlidingMusicPanelActivity
         implements CabHolder, SharedPreferences.OnSharedPreferenceChangeListener {
-
     public static final String TAG = MainActivity.class.getSimpleName();
     public static final int APP_INTRO_REQUEST = 100;
     public static final String EXPAND_PANEL = "expand_panel";
@@ -115,10 +115,11 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
             }
         }
     };
+    @SuppressWarnings("FieldCanBeLocal")
+    private ScrollHelper scrollHelper;
     private MainActivityFragmentCallbacks currentFragment;
     private boolean blockRequestPermissions = false;
     private MaterialCab cab;
-    private AppBarLayout mAppBarLayout;
     private Toolbar mToolbar;
     private AppUpdateManager appUpdateManager;
     InstallStateUpdatedListener listener = new InstallStateUpdatedListener() {
@@ -163,7 +164,6 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
         }
 
         mToolbar = findViewById(R.id.toolbar);
-        mAppBarLayout = findViewById(R.id.appBarLayout);
 
         //checkShowChangelog();
         AppRater.appLaunched(this);
@@ -177,7 +177,7 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
             selectedFragment(item.getItemId());
             return true;
         });
-        mIntentFilter.addAction(MusicService.MEDIA_STORE_CHANGED);
+        scrollHelper = new RetroScrollHelper(this);
     }
 
 
@@ -253,14 +253,6 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
         PreferenceUtil.getInstance(this).unregisterOnSharedPreferenceChangedListener(this);
     }
 
-    public void addOnAppBarOffsetChangedListener(
-            @NonNull AppBarLayout.OnOffsetChangedListener onOffsetChangedListener) {
-        mAppBarLayout.addOnOffsetChangedListener(onOffsetChangedListener);
-    }
-
-    public int getTotalAppBarScrollingRange() {
-        return mAppBarLayout.getTotalScrollRange();
-    }
 
     @Override
     public boolean handleBackPress() {
@@ -405,11 +397,6 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
         return cab;
     }
 
-    public void removeOnAppBarOffsetChangedListener(
-            @NonNull AppBarLayout.OnOffsetChangedListener onOffsetChangedListener) {
-        mAppBarLayout.removeOnOffsetChangedListener(onOffsetChangedListener);
-    }
-
     public void setCurrentFragment(@NonNull Fragment fragment, @NonNull String tag) {
         String currentTag = null;
         if (getSupportFragmentManager().findFragmentByTag(tag) != null) {
@@ -830,7 +817,6 @@ public class MainActivity extends AbsSlidingMusicPanelActivity
     private void setupToolbar() {
         setTitle(null);
         mToolbar.setBackgroundColor(ATHUtil.INSTANCE.resolveColor(this, R.attr.colorSurface));
-        mAppBarLayout.setBackgroundColor(ATHUtil.INSTANCE.resolveColor(this, R.attr.colorSurface));
         setSupportActionBar(mToolbar);
     }
 }

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

@@ -212,9 +212,9 @@ class SkuDetailsAdapter(
         val titleTextColor = if (purchased) ATHUtil.resolveColor(
             donationsDialog,
             android.R.attr.textColorHint
-        ) else textColorPrimary(donationsDialog)
+        ) else donationsDialog.textColorPrimary()
         val contentTextColor =
-            if (purchased) titleTextColor else textColorSecondary(donationsDialog)
+            if (purchased) titleTextColor else donationsDialog.textColorSecondary()
 
         viewHolder.title.setTextColor(titleTextColor)
         viewHolder.text.setTextColor(contentTextColor)

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

@@ -127,10 +127,14 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity(),
         }
     }
 
+    override fun onPause() {
+        super.onPause()
+        behavior.removeBottomSheetCallback(bottomSheetCallbackList)
+    }
+
     override fun onDestroy() {
         super.onDestroy()
-        behavior.removeBottomSheetCallback(bottomSheetCallbackList)
-        if (navigationBarColorAnimator != null) navigationBarColorAnimator?.cancel() // just in case
+        navigationBarColorAnimator?.cancel()
     }
 
     protected fun wrapSlidingMusicPanel(@LayoutRes resId: Int): View {
@@ -158,7 +162,7 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity(),
         // necessary to make the views below clickable
         miniPlayerFragment?.view?.visibility = if (alpha == 0f) View.GONE else View.VISIBLE
 
-        bottomNavigationView.translationY = progress * 500
+        //bottomNavigationView.translationY = progress * 500
         //bottomNavigationView.alpha = alpha
     }
 
@@ -387,4 +391,5 @@ abstract class AbsSlidingMusicPanelActivity : AbsMusicServiceActivity(),
             bottomNavigationView.hide()
         }
     }
+
 }

app/src/main/java/code/name/monkey/retromusic/extensions/ColorExt.kt

@@ -17,7 +17,9 @@ package code.name.monkey.retromusic.extensions
 import android.content.Context
 import android.content.res.ColorStateList
 import android.graphics.Color
+import android.view.View
 import androidx.appcompat.widget.Toolbar
+import androidx.fragment.app.Fragment
 import code.name.monkey.appthemehelper.ThemeStore
 import code.name.monkey.appthemehelper.util.ATHUtil
 import code.name.monkey.appthemehelper.util.ColorUtil
@@ -31,10 +33,26 @@ fun Context.accentColor(): Int {
     return ThemeStore.accentColor(this)
 }
 
+fun View.accentColor(): Int {
+    return ThemeStore.accentColor(context)
+}
+
+fun Fragment.accentColor(): Int {
+    return ThemeStore.accentColor(requireContext())
+}
+
 fun Context.surfaceColor(): Int {
     return ATHUtil.resolveColor(this, R.attr.colorSurface, Color.WHITE)
 }
 
+fun View.surfaceColor(): Int {
+    return ATHUtil.resolveColor(context, R.attr.colorSurface, Color.WHITE)
+}
+
+fun Fragment.surfaceColor(): Int {
+    return ATHUtil.resolveColor(requireContext(), R.attr.colorSurface, Color.WHITE)
+}
+
 fun Toolbar.backgroundTintList() {
     val surfaceColor = ATHUtil.resolveColor(context, R.attr.colorSurface, Color.BLACK)
     val colorStateList = ColorStateList.valueOf(surfaceColor)
@@ -45,10 +63,26 @@ fun Context.textColorSecondary(): Int {
     return ATHUtil.resolveColor(this, android.R.attr.textColorSecondary)
 }
 
+fun Fragment.textColorSecondary(): Int {
+    return ATHUtil.resolveColor(requireContext(), android.R.attr.textColorSecondary)
+}
+
 fun Context.colorControlNormal(): Int {
     return ATHUtil.resolveColor(this, android.R.attr.colorControlNormal)
 }
 
+fun View.colorControlNormal(): Int {
+    return ATHUtil.resolveColor(context, android.R.attr.colorControlNormal)
+}
+
 fun Context.textColorPrimary(): Int {
     return ATHUtil.resolveColor(this, android.R.attr.textColorPrimary)
+}
+
+fun View.textColorPrimary(): Int {
+    return ATHUtil.resolveColor(context, android.R.attr.textColorPrimary)
+}
+
+fun Fragment.textColorPrimary(): Int {
+    return ATHUtil.resolveColor(requireContext(), android.R.attr.textColorPrimary)
 }

app/src/main/java/code/name/monkey/retromusic/extensions/ContextExtensions.kt

@@ -0,0 +1,10 @@
+package code.name.monkey.retromusic.extensions
+
+import android.content.Context
+import androidx.annotation.DimenRes
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun Context.dip(value: Int): Int = (value * resources.displayMetrics.density).toInt()
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun Context.dimen(@DimenRes resource: Int): Int = resources.getDimensionPixelSize(resource)

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

@@ -84,10 +84,10 @@ open class MiniPlayerFragment : AbsMusicServiceFragment(), MusicProgressViewUpda
 
         val song = MusicPlayerRemote.currentSong
         val title = SpannableString(song.title)
-        title.setSpan(ForegroundColorSpan(textColorPrimary(requireContext())), 0, title.length, 0)
+        title.setSpan(ForegroundColorSpan(textColorPrimary()), 0, title.length, 0)
 
         val text = SpannableString(song.artistName)
-        text.setSpan(ForegroundColorSpan(textColorSecondary(requireContext())), 0, text.length, 0)
+        text.setSpan(ForegroundColorSpan(textColorSecondary()), 0, text.length, 0)
 
         builder.append(title).append(" • ").append(text)
 

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

@@ -10,6 +10,7 @@ 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.util.PreferenceUtil
+import dev.olog.scrollhelper.layoutmanagers.OverScrollGridLayoutManager
 
 class AlbumsFragment :
     AbsLibraryPagerRecyclerViewCustomGridSizeFragment<AlbumAdapter, GridLayoutManager>(),
@@ -32,7 +33,7 @@ class AlbumsFragment :
         get() = R.string.no_albums
 
     override fun createLayoutManager(): GridLayoutManager {
-        return GridLayoutManager(requireActivity(), getGridSize())
+        return OverScrollGridLayoutManager(requireActivity(), getGridSize())
     }
 
     override fun createAdapter(): AlbumAdapter {

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

@@ -10,12 +10,13 @@ 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.util.PreferenceUtil
+import dev.olog.scrollhelper.layoutmanagers.OverScrollGridLayoutManager
 
 class ArtistsFragment :
     AbsLibraryPagerRecyclerViewCustomGridSizeFragment<ArtistAdapter, GridLayoutManager>(),
     MainActivityFragmentCallbacks {
 
-    lateinit var artistViewModel: ArtistViewModel
+    private lateinit var artistViewModel: ArtistViewModel
 
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -46,7 +47,7 @@ class ArtistsFragment :
     }
 
     override fun createLayoutManager(): GridLayoutManager {
-        return GridLayoutManager(requireActivity(), getGridSize())
+        return OverScrollGridLayoutManager(requireActivity(), getGridSize())
     }
 
     override fun createAdapter(): ArtistAdapter {

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

@@ -8,17 +8,13 @@ import androidx.annotation.NonNull
 import androidx.annotation.StringRes
 import androidx.recyclerview.widget.RecyclerView
 import code.name.monkey.retromusic.R
-import code.name.monkey.retromusic.helper.MusicPlayerRemote
-import code.name.monkey.retromusic.util.DensityUtil
 import code.name.monkey.retromusic.util.ThemedFastScroller.create
-import code.name.monkey.retromusic.views.ScrollingViewOnApplyWindowInsetsListener
-import com.google.android.material.appbar.AppBarLayout
 import kotlinx.android.synthetic.main.fragment_main_activity_recycler_view.*
 import me.zhanghai.android.fastscroll.FastScroller
 import me.zhanghai.android.fastscroll.FastScrollerBuilder
 
 abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>, LM : RecyclerView.LayoutManager> :
-    AbsLibraryPagerFragment(), AppBarLayout.OnOffsetChangedListener {
+    AbsLibraryPagerFragment() {
 
     protected var adapter: A? = null
     protected var layoutManager: LM? = null
@@ -31,7 +27,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        mainActivity.addOnAppBarOffsetChangedListener(this)
         initLayoutManager()
         initAdapter()
         setUpRecyclerView()
@@ -41,13 +36,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
         recyclerView.layoutManager = layoutManager
         recyclerView.adapter = adapter
         val fastScroller = create(recyclerView)
-        recyclerView.setOnApplyWindowInsetsListener(
-            ScrollingViewOnApplyWindowInsetsListener(
-                recyclerView,
-                fastScroller
-            )
-        )
-        checkForPadding()
     }
 
     protected open fun createFastScroller(recyclerView: RecyclerView): FastScroller {
@@ -60,7 +48,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
             override fun onChanged() {
                 super.onChanged()
                 checkIsEmpty()
-                checkForPadding()
             }
         })
     }
@@ -78,18 +65,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
         empty.visibility = if (adapter!!.itemCount == 0) View.VISIBLE else View.GONE
     }
 
-    private fun checkForPadding() {
-        val itemCount: Int = adapter?.itemCount ?: 0
-        val params = container.layoutParams as ViewGroup.MarginLayoutParams
-        if (itemCount > 0 && MusicPlayerRemote.playingQueue.isNotEmpty()) {
-            val height = DensityUtil.dip2px(requireContext(), 104f)
-            params.bottomMargin = height
-        } else {
-            val height = DensityUtil.dip2px(requireContext(), 52f)
-            params.bottomMargin = height
-        }
-    }
-
     private fun initLayoutManager() {
         layoutManager = createLayoutManager()
     }
@@ -99,25 +74,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
     @NonNull
     protected abstract fun createAdapter(): A
 
-    override fun onOffsetChanged(p0: AppBarLayout?, i: Int) {
-        container.setPadding(
-            container.paddingLeft,
-            container.paddingTop,
-            container.paddingRight,
-            mainActivity.totalAppBarScrollingRange + i
-        )
-    }
-
-    override fun onQueueChanged() {
-        super.onQueueChanged()
-        checkForPadding()
-    }
-
-    override fun onServiceConnected() {
-        super.onServiceConnected()
-        checkForPadding()
-    }
-
     protected fun invalidateLayoutManager() {
         initLayoutManager()
         recyclerView.layoutManager = layoutManager
@@ -129,11 +85,6 @@ abstract class AbsLibraryPagerRecyclerViewFragment<A : RecyclerView.Adapter<*>,
         recyclerView.adapter = adapter
     }
 
-    override fun onDestroyView() {
-        super.onDestroyView()
-        mainActivity.removeOnAppBarOffsetChangedListener(this)
-    }
-
     fun recyclerView(): RecyclerView {
         return recyclerView
     }

app/src/main/java/code/name/monkey/retromusic/fragments/folder/FoldersFragment.java

@@ -12,7 +12,7 @@
  * See the GNU General Public License for more details.
  */
 
-package code.name.monkey.retromusic.fragments.mainactivity;
+package code.name.monkey.retromusic.fragments.folder;
 
 import android.app.Dialog;
 import android.content.Context;
@@ -73,6 +73,7 @@ import code.name.monkey.retromusic.util.RetroColorUtil;
 import code.name.monkey.retromusic.util.ThemedFastScroller;
 import code.name.monkey.retromusic.views.BreadCrumbLayout;
 import code.name.monkey.retromusic.views.ScrollingViewOnApplyWindowInsetsListener;
+import dev.olog.scrollhelper.layoutmanagers.OverScrollLinearLayoutManager;
 import me.zhanghai.android.fastscroll.FastScroller;
 
 public class FoldersFragment extends AbsMainActivityFragment implements
@@ -478,7 +479,7 @@ public class FoldersFragment extends AbsMainActivityFragment implements
     }
 
     private void setUpRecyclerView() {
-        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
+        recyclerView.setLayoutManager(new OverScrollLinearLayoutManager(getActivity()));
         FastScroller fastScroller = ThemedFastScroller.INSTANCE.create(recyclerView);
         recyclerView.setOnApplyWindowInsetsListener(
                 new ScrollingViewOnApplyWindowInsetsListener(recyclerView, fastScroller));

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

@@ -24,11 +24,12 @@ 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 dev.olog.scrollhelper.layoutmanagers.OverScrollLinearLayoutManager
 
 class GenresFragment : AbsLibraryPagerRecyclerViewFragment<GenreAdapter, LinearLayoutManager>(),
     MainActivityFragmentCallbacks {
 
-    lateinit var genreViewModel: GenreViewModel
+    private lateinit var genreViewModel: GenreViewModel
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -52,7 +53,7 @@ class GenresFragment : AbsLibraryPagerRecyclerViewFragment<GenreAdapter, LinearL
     }
 
     override fun createLayoutManager(): LinearLayoutManager {
-        return LinearLayoutManager(activity)
+        return OverScrollLinearLayoutManager(activity)
     }
 
     override fun createAdapter(): GenreAdapter {

app/src/main/java/code/name/monkey/retromusic/fragments/home/BannerHomeFragment.kt

@@ -21,7 +21,6 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.lifecycle.ViewModelProvider
-import androidx.recyclerview.widget.LinearLayoutManager
 import code.name.monkey.appthemehelper.ThemeStore
 import code.name.monkey.appthemehelper.util.TintHelper
 import code.name.monkey.retromusic.Constants
@@ -39,6 +38,7 @@ import code.name.monkey.retromusic.util.NavigationUtil
 import code.name.monkey.retromusic.util.PreferenceUtil
 import com.bumptech.glide.Glide
 import com.bumptech.glide.load.engine.DiskCacheStrategy
+import dev.olog.scrollhelper.layoutmanagers.OverScrollLinearLayoutManager
 import kotlinx.android.synthetic.main.abs_playlists.*
 import kotlinx.android.synthetic.main.fragment_banner_home.*
 import kotlinx.android.synthetic.main.home_content.*
@@ -63,6 +63,7 @@ class BannerHomeFragment : AbsMainActivityFragment(), MainActivityFragmentCallba
     }
 
     private fun loadImageFromStorage() {
+
         Glide.with(requireContext())
             .load(
                 File(
@@ -144,7 +145,7 @@ class BannerHomeFragment : AbsMainActivityFragment(), MainActivityFragmentCallba
 
         homeAdapter = HomeAdapter(mainActivity, displayMetrics)
         recyclerView.apply {
-            layoutManager = LinearLayoutManager(mainActivity)
+            layoutManager = OverScrollLinearLayoutManager(mainActivity)
             adapter = homeAdapter
         }
         homeModel = ViewModelProvider(this).get(HomeViewModel::class.java)

app/src/main/java/code/name/monkey/retromusic/fragments/player/adaptive/AdaptiveFragment.kt

@@ -159,8 +159,8 @@ class AdaptiveFragment : AbsPlayerFragment(), MusicProgressViewUpdateHelper.Call
             inflateMenu(R.menu.menu_player)
             setNavigationOnClickListener { requireActivity().onBackPressed() }
             ToolbarContentTintHelper.colorizeToolbar(this, primaryColor, requireActivity())
-            setTitleTextColor(textColorPrimary(requireContext()))
-            setSubtitleTextColor(textColorSecondary(requireContext()))
+            setTitleTextColor(textColorPrimary())
+            setSubtitleTextColor(textColorSecondary())
             setOnMenuItemClickListener(this@AdaptiveFragment)
         }
     }

app/src/main/java/code/name/monkey/retromusic/fragments/player/lockscreen/LockScreenPlayerControlsFragment.kt

@@ -124,7 +124,7 @@ class LockScreenPlayerControlsFragment : AbsPlayerControlsFragment() {
         val colorFinal = if (PreferenceUtil.getInstance(requireContext()).adaptiveColor) {
             color.primaryTextColor
         } else {
-            textColorSecondary(requireContext())
+            textColorSecondary()
         }.ripAlpha()
 
         volumeFragment?.setTintable(colorFinal)

app/src/main/java/code/name/monkey/retromusic/fragments/player/material/MaterialControlsFragment.kt

@@ -104,7 +104,7 @@ class MaterialControlsFragment : AbsPlayerControlsFragment() {
                 MaterialValueHelper.getPrimaryTextColor(requireContext(), false)
             lastDisabledPlaybackControlsColor =
                 MaterialValueHelper.getPrimaryDisabledTextColor(requireContext(), false)
-        }else{
+        } else {
             lastPlaybackControlsColor =
                 MaterialValueHelper.getSecondaryTextColor(requireContext(), true)
             lastDisabledPlaybackControlsColor =
@@ -116,7 +116,7 @@ class MaterialControlsFragment : AbsPlayerControlsFragment() {
         val colorFinal = if (PreferenceUtil.getInstance(requireContext()).adaptiveColor) {
             lastPlaybackControlsColor
         } else {
-            textColorSecondary(requireContext())
+            textColorSecondary()
         }.ripAlpha()
 
         text.setTextColor(colorFinal)

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

@@ -11,6 +11,7 @@ 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 dev.olog.scrollhelper.layoutmanagers.OverScrollGridLayoutManager
 
 class PlaylistsFragment :
     AbsLibraryPagerRecyclerViewFragment<PlaylistAdapter, GridLayoutManager>(),
@@ -38,7 +39,7 @@ class PlaylistsFragment :
         get() = R.string.no_playlists
 
     override fun createLayoutManager(): GridLayoutManager {
-        return GridLayoutManager(requireContext(), 1)
+        return OverScrollGridLayoutManager(requireContext(), 1)
     }
 
     override fun createAdapter(): PlaylistAdapter {

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

@@ -28,6 +28,7 @@ import com.h6ah4i.android.widget.advrecyclerview.draggable.RecyclerViewDragDropM
 import com.h6ah4i.android.widget.advrecyclerview.swipeable.RecyclerViewSwipeManager
 import com.h6ah4i.android.widget.advrecyclerview.touchguard.RecyclerViewTouchActionGuardManager
 import com.h6ah4i.android.widget.advrecyclerview.utils.WrapperAdapterUtils
+import dev.olog.scrollhelper.layoutmanagers.OverScrollLinearLayoutManager
 import kotlinx.android.synthetic.main.activity_playing_queue.*
 
 /**
@@ -73,7 +74,7 @@ class PlayingQueueFragment :
     }
 
     override fun createLayoutManager(): LinearLayoutManager {
-        return LinearLayoutManager(requireContext())
+        return OverScrollLinearLayoutManager(requireContext())
     }
 
     override fun createAdapter(): PlayingQueueAdapter {

app/src/main/java/code/name/monkey/retromusic/fragments/settings/MainSettingsFragment.kt

@@ -68,7 +68,9 @@ class MainSettingsFragment : Fragment(), View.OnClickListener {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        scrollView.setOnScrollChangeListener(View.OnScrollChangeListener { v, scrollX, scrollY, oldScrollX, oldScrollY ->
 
+        })
         generalSettings.setOnClickListener(this)
         audioSettings.setOnClickListener(this)
         nowPlayingSettings.setOnClickListener(this)

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

@@ -14,6 +14,7 @@ import code.name.monkey.retromusic.model.Song
 import code.name.monkey.retromusic.mvp.presenter.SongPresenter
 import code.name.monkey.retromusic.mvp.presenter.SongView
 import code.name.monkey.retromusic.util.PreferenceUtil
+import dev.olog.scrollhelper.layoutmanagers.OverScrollGridLayoutManager
 import java.util.*
 import javax.inject.Inject
 
@@ -38,8 +39,7 @@ class SongsFragment :
     }
 
     override fun createLayoutManager(): GridLayoutManager {
-        println("createLayoutManager: ${getGridSize()}")
-        return GridLayoutManager(requireActivity(), getGridSize()).apply {
+        return OverScrollGridLayoutManager(requireActivity(), getGridSize()).apply {
             spanSizeLookup = object : GridLayoutManager.SpanSizeLookup() {
                 override fun getSpanSize(position: Int): Int {
                     return if (position == 0) {

app/src/main/java/code/name/monkey/retromusic/preferences/AlbumCoverStylePreferenceDialog.kt

@@ -57,9 +57,10 @@ class AlbumCoverStylePreference @JvmOverloads constructor(
     }
 
     init {
+
         icon?.colorFilter =
             BlendModeColorFilterCompat.createBlendModeColorFilterCompat(
-                colorControlNormal(context),
+                context.colorControlNormal(),
                 SRC_IN
             )
     }

app/src/main/java/code/name/monkey/retromusic/preferences/BlacklistPreferenceDialog.kt

@@ -43,7 +43,7 @@ class BlacklistPreference @JvmOverloads constructor(
     init {
         icon?.colorFilter =
             BlendModeColorFilterCompat.createBlendModeColorFilterCompat(
-                colorControlNormal(context),
+                context.colorControlNormal( ),
                 SRC_IN
             )
     }

app/src/main/java/code/name/monkey/retromusic/preferences/LibraryPreference.kt

@@ -45,7 +45,7 @@ class LibraryPreference @JvmOverloads constructor(
     init {
         icon?.colorFilter =
             BlendModeColorFilterCompat.createBlendModeColorFilterCompat(
-                colorControlNormal(context),
+                context.colorControlNormal(),
                 SRC_IN
             )
     }

app/src/main/java/code/name/monkey/retromusic/preferences/MaterialListPreference.kt

@@ -43,7 +43,7 @@ class MaterialListPreference @JvmOverloads constructor(
 
     init {
         icon?.colorFilter = BlendModeColorFilterCompat.createBlendModeColorFilterCompat(
-            colorControlNormal(context),
+            context.colorControlNormal(),
             SRC_IN
         )
     }

app/src/main/java/code/name/monkey/retromusic/preferences/NowPlayingScreenPreferenceDialog.kt

@@ -57,7 +57,7 @@ class NowPlayingScreenPreference @JvmOverloads constructor(
 
     init {
         icon?.colorFilter = BlendModeColorFilterCompat.createBlendModeColorFilterCompat(
-            colorControlNormal(context),
+            context.colorControlNormal(),
             SRC_IN
         )
     }

app/src/main/java/code/name/monkey/retromusic/util/PreferenceUtil.java

@@ -44,7 +44,7 @@ import java.util.Objects;
 import code.name.monkey.retromusic.R;
 import code.name.monkey.retromusic.fragments.AlbumCoverStyle;
 import code.name.monkey.retromusic.fragments.NowPlayingScreen;
-import code.name.monkey.retromusic.fragments.mainactivity.FoldersFragment;
+import code.name.monkey.retromusic.fragments.folder.FoldersFragment;
 import code.name.monkey.retromusic.helper.SortOrder.AlbumSongSortOrder;
 import code.name.monkey.retromusic.model.CategoryInfo;
 import code.name.monkey.retromusic.model.CategoryInfo.Category;

app/src/main/java/code/name/monkey/retromusic/util/ThemedFastScroller.kt

@@ -14,21 +14,23 @@
 package code.name.monkey.retromusic.util
 
 import android.view.ViewGroup
-import code.name.monkey.appthemehelper.ThemeStore.Companion.accentColor
 import code.name.monkey.appthemehelper.util.ColorUtil.isColorLight
 import code.name.monkey.appthemehelper.util.MaterialValueHelper.getPrimaryTextColor
 import code.name.monkey.appthemehelper.util.TintHelper
+import code.name.monkey.retromusic.R
+import code.name.monkey.retromusic.extensions.accentColor
+import code.name.monkey.retromusic.extensions.dimen
+import code.name.monkey.retromusic.extensions.dip
 import code.name.monkey.retromusic.views.PopupBackground
 import me.zhanghai.android.fastscroll.FastScroller
 import me.zhanghai.android.fastscroll.FastScrollerBuilder
 import me.zhanghai.android.fastscroll.PopupStyles
-import me.zhanghai.android.fastscroll.R
+
 
 object ThemedFastScroller {
     fun create(view: ViewGroup): FastScroller {
         val context = view.context
-        val color = accentColor(context)
-        val textColor = getPrimaryTextColor(context, isColorLight(color))
+        val textColor = getPrimaryTextColor(context, isColorLight(context.accentColor()))
         val fastScrollerBuilder = FastScrollerBuilder(view)
         fastScrollerBuilder.useMd2Style()
         fastScrollerBuilder.setPopupStyle { popupText ->
@@ -36,12 +38,17 @@ object ThemedFastScroller {
             popupText.background = PopupBackground(context)
             popupText.setTextColor(textColor)
         }
-
+        fastScrollerBuilder.setPadding(
+            0,
+            view.context.dimen(R.dimen.toolbar_height) + view.context.dip(8),
+            0,
+            view.context.dimen(R.dimen.mini_player_height)
+        )
         fastScrollerBuilder.setThumbDrawable(
             TintHelper.createTintedDrawable(
                 context,
                 R.drawable.afs_md2_thumb,
-                color
+                context.accentColor()
             )
         )
         return fastScrollerBuilder.build()

app/src/main/java/code/name/monkey/retromusic/views/StatusBarView.java

@@ -1,59 +0,0 @@
-/*
- * 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.views;
-
-import android.content.Context;
-import android.content.res.Resources;
-import android.util.AttributeSet;
-import android.view.View;
-
-import androidx.annotation.NonNull;
-
-public class StatusBarView extends View {
-
-
-    public StatusBarView(@NonNull Context context) {
-        super(context);
-        init(context);
-    }
-
-    public StatusBarView(@NonNull Context context, @NonNull AttributeSet attrs) {
-        super(context, attrs);
-        init(context);
-    }
-
-    public StatusBarView(@NonNull Context context, @NonNull AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-        init(context);
-    }
-
-    public static int getStatusBarHeight(@NonNull Resources r) {
-        int result = 0;
-        int resourceId = r.getIdentifier("status_bar_height", "dimen", "android");
-        if (resourceId > 0) {
-            result = r.getDimensionPixelSize(resourceId);
-        }
-        return result;
-    }
-
-    private void init(Context context) {
-
-    }
-
-    @Override
-    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), getStatusBarHeight(getResources()));
-    }
-}

app/src/main/java/code/name/monkey/retromusic/views/StatusBarView.kt

@@ -0,0 +1,42 @@
+/*
+ * 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.views
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+
+class StatusBarView(
+    context: Context,
+    attrs: AttributeSet
+) : View(context, attrs) {
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+        if (isInEditMode) {
+            return
+        }
+        setOnApplyWindowInsetsListener { _, insets ->
+            val height = insets?.systemWindowInsetTop ?: 0
+            setHeight(height)
+            insets
+        }
+    }
+
+    private fun setHeight(px: Int) {
+        val params = layoutParams ?: return
+        params.height = px
+        layoutParams = params
+    }
+}

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

@@ -1,60 +1,55 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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">
+    android:background="?colorSurface">
+
+    <!--    TODO in order to work, children has to be defined in reverse drawing order-->
+    <!--    TODO so: first fragment_container, than toolbar, than statusbar -->
+
+    <FrameLayout
+        android:id="@+id/fragment_container"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/status_bar" />
 
     <FrameLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:elevation="0dp"
-        tools:ignore="UnusedAttribute">
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/status_bar">
 
-        <include layout="@layout/status_bar" />
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/toolbar_height"
+            android:background="?attr/colorSurface"
+            app:popupTheme="?attr/toolbarPopupTheme"
+            app:title="@string/app_name"
+            app:titleTextAppearance="@style/TextViewHeadline6"
+            app:titleTextColor="?attr/colorControlNormal"
+            tools:ignore="UnusedAttribute" />
 
+        <ViewStub
+            android:id="@+id/cab_stub"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/toolbar_height" />
     </FrameLayout>
 
-    <androidx.coordinatorlayout.widget.CoordinatorLayout
-        android:id="@+id/mainContent"
-        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"
-            app:liftOnScroll="true">
+    <include
+        layout="@layout/status_bar"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_height="24dp" />
 
-            <FrameLayout
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                app:layout_scrollFlags="scroll|enterAlways">
-
-                <androidx.appcompat.widget.Toolbar
-                    android:id="@+id/toolbar"
-                    android:layout_width="match_parent"
-                    android:layout_height="wrap_content"
-                    android:background="?attr/colorSurface"
-                    app:popupTheme="?attr/toolbarPopupTheme"
-                    app:title="@string/app_name"
-                    app:titleTextAppearance="@style/ToolbarTextAppearanceNormal.Library"
-                    app:titleTextColor="?attr/colorControlNormal"
-                    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.appbar.AppBarLayout>
-
-        <FrameLayout
-            android:id="@+id/fragment_container"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
-    </androidx.coordinatorlayout.widget.CoordinatorLayout>
-</LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -15,9 +15,10 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/container"
-    android:overScrollMode="never"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:layout_marginTop="@dimen/toolbar_height"
+    android:overScrollMode="never"
     app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
 
     <androidx.constraintlayout.widget.ConstraintLayout

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

@@ -11,64 +11,59 @@
   ~ without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   ~ See the GNU General Public License for more details.
   -->
-<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:layout_marginTop="@dimen/toolbar_height"
     android:overScrollMode="never"
     app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
 
-    <androidx.constraintlayout.widget.ConstraintLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
+    <code.name.monkey.retromusic.views.RetroShapeableImageView
+        android:id="@+id/userImage"
+        android:layout_width="42dp"
+        android:layout_height="42dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="16dp"
+        android:layout_marginBottom="8dp"
+        android:scaleType="centerCrop"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:retroCornerSize="21dp"
+        tools:srcCompat="@tools:sample/avatars" />
 
-        <code.name.monkey.retromusic.views.RetroShapeableImageView
-            android:id="@+id/userImage"
-            android:layout_width="42dp"
-            android:layout_height="42dp"
-            android:layout_marginStart="16dp"
-            android:layout_marginTop="16dp"
-            android:layout_marginBottom="8dp"
-            android:scaleType="centerCrop"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="parent"
-            app:retroCornerSize="21dp"
-            tools:srcCompat="@tools:sample/avatars" />
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/text"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:ellipsize="end"
+        android:text="@string/welcome"
+        app:layout_constraintStart_toEndOf="@+id/userImage"
+        app:layout_constraintTop_toTopOf="@+id/userImage"
+        tools:text="@tools:sample/lorem" />
 
-        <com.google.android.material.textview.MaterialTextView
-            android:id="@+id/text"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="16dp"
-            android:ellipsize="end"
-            android:text="@string/welcome"
-            app:layout_constraintStart_toEndOf="@+id/userImage"
-            app:layout_constraintTop_toTopOf="@+id/userImage"
-            tools:text="@tools:sample/lorem" />
+    <com.google.android.material.textview.MaterialTextView
+        android:id="@+id/titleWelcome"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:padding="0dp"
+        android:textAppearance="@style/TextViewHeadline5"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textStyle="bold"
+        app:layout_constraintBottom_toBottomOf="@+id/userImage"
+        app:layout_constraintStart_toEndOf="@+id/userImage"
+        app:layout_constraintTop_toBottomOf="@+id/text"
+        tools:text="@tools:sample/lorem" />
 
-        <com.google.android.material.textview.MaterialTextView
-            android:id="@+id/titleWelcome"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="16dp"
-            android:padding="0dp"
-            android:textAppearance="@style/TextViewHeadline5"
-            android:textColor="?android:attr/textColorPrimary"
-            android:textStyle="bold"
-            app:layout_constraintBottom_toBottomOf="@+id/userImage"
-            app:layout_constraintStart_toEndOf="@+id/userImage"
-            app:layout_constraintTop_toBottomOf="@+id/text"
-            tools:text="@tools:sample/lorem" />
-
-        <include
-            layout="@layout/home_content"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/titleWelcome" />
-    </androidx.constraintlayout.widget.ConstraintLayout>
-
-</androidx.core.widget.NestedScrollView>
+    <include
+        layout="@layout/home_content"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/titleWelcome" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -5,11 +5,12 @@
     android:id="@+id/container"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
-
+    <!--    TODO note that recycler view has to cover the entire screen -->
+    <!--    TODO so has to be drawn under bottom navigation, toolbar, ecc, but has to be below statusbar-->
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recyclerView"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:clipToPadding="false"
         android:layoutAnimation="@anim/layout_animation_fall_down"
         android:overScrollMode="never"

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/scrollView"
     android:layout_width="match_parent"
@@ -162,4 +162,4 @@
             app:settingListItemTitle="@string/action_about" />
 
     </LinearLayout>
-</androidx.core.widget.NestedScrollView>
+</ScrollView>

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

@@ -4,7 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/miniPlayerContent"
     android:layout_width="match_parent"
-    android:layout_height="@dimen/bottom_sheet_peek_1_height"
+    android:layout_height="@dimen/mini_player_height"
     android:background="?attr/colorSurface"
     android:clickable="true"
     android:focusable="true"

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

@@ -5,5 +5,4 @@
     android:layout_width="match_parent"
     android:layout_height="0dp"
     android:background="@android:color/transparent"
-    android:elevation="@dimen/toolbar_elevation"
     tools:ignore="UnusedAttribute" />