Added Collapsing appbar to library tabs with an option to switch back to simple appbar

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

@@ -0,0 +1,59 @@
+package code.name.monkey.retromusic.views
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import androidx.appcompat.widget.Toolbar
+import code.name.monkey.retromusic.databinding.CollapsingAppbarLayoutBinding
+import code.name.monkey.retromusic.databinding.SimpleAppbarLayoutBinding
+import code.name.monkey.retromusic.util.PreferenceUtil
+import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.shape.MaterialShapeDrawable
+
+class TopAppBarLayout @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = -1,
+) : AppBarLayout(context, attrs, defStyleAttr) {
+    private var simpleAppbarBinding: SimpleAppbarLayoutBinding? = null
+    private var collapsingAppbarBinding: CollapsingAppbarLayoutBinding? = null
+
+    val mode: AppBarMode = PreferenceUtil.appBarMode
+
+    init {
+        if (mode == AppBarMode.COLLAPSING) {
+            collapsingAppbarBinding =
+                CollapsingAppbarLayoutBinding.inflate(LayoutInflater.from(context), this, true)
+        } else {
+            simpleAppbarBinding =
+                SimpleAppbarLayoutBinding.inflate(LayoutInflater.from(context), this, true)
+            statusBarForeground = MaterialShapeDrawable.createWithElevationOverlay(context)
+        }
+    }
+
+    val toolbar: Toolbar
+        get() = if (mode == AppBarMode.COLLAPSING) {
+            collapsingAppbarBinding?.toolbar!!
+        } else {
+            simpleAppbarBinding?.toolbar!!
+        }
+
+    var title: String
+        get() = if (mode == AppBarMode.COLLAPSING) {
+            collapsingAppbarBinding?.collapsingToolbarLayout?.title.toString()
+        } else {
+            simpleAppbarBinding?.appNameText?.text.toString()
+        }
+        set(value) {
+            if (mode == AppBarMode.COLLAPSING) {
+                collapsingAppbarBinding?.collapsingToolbarLayout?.title = value
+            } else {
+                simpleAppbarBinding?.appNameText?.text = value
+            }
+        }
+
+    enum class AppBarMode {
+        COLLAPSING,
+        SIMPLE
+    }
+}