MainActivity: Fix snackbar overlapping FABs

app/src/main/java/emu/skyline/MainActivity.kt

@@ -102,7 +102,7 @@ class MainActivity : AppCompatActivity(), View.OnClickListener, View.OnLongClick
         }
 
         thread(start = true) {
-            val snackbar = Snackbar.make(findViewById(android.R.id.content), getString(R.string.searching_roms), Snackbar.LENGTH_INDEFINITE)
+            val snackbar = Snackbar.make(coordinatorLayout, getString(R.string.searching_roms), Snackbar.LENGTH_INDEFINITE)
             runOnUiThread {
                 snackbar.show()
                 requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LOCKED

app/src/main/java/emu/skyline/views/CustomLinearLayout.kt

@@ -0,0 +1,42 @@
+/*
+ * SPDX-License-Identifier: MPL-2.0
+ * Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
+ */
+
+package emu.skyline.views
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import android.widget.LinearLayout
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import com.google.android.material.snackbar.Snackbar.SnackbarLayout
+
+/**
+ * Custom linear layout with support for [CoordinatorLayout] to move children, when [com.google.android.material.snackbar.Snackbar] shows up.
+ */
+class CustomLinearLayout : LinearLayout, CoordinatorLayout.AttachedBehavior {
+
+    constructor(context : Context) : this(context, null)
+    constructor(context : Context, attrs : AttributeSet?) : this(context, attrs, 0)
+    constructor(context : Context, attrs : AttributeSet?, defStyleAttr : Int) : super(context, attrs, defStyleAttr)
+
+    override fun getBehavior() : CoordinatorLayout.Behavior<CustomLinearLayout> = MoveUpwardBehavior()
+
+    /**
+     * Defines behaviour when [com.google.android.material.snackbar.Snackbar] is shown.
+     * Simply sets an offset to y translation to move children out of the way.
+     */
+    class MoveUpwardBehavior : CoordinatorLayout.Behavior<CustomLinearLayout>() {
+        override fun layoutDependsOn(parent : CoordinatorLayout, child : CustomLinearLayout, dependency : View) : Boolean = dependency is SnackbarLayout
+
+        override fun onDependentViewChanged(parent : CoordinatorLayout, child : CustomLinearLayout, dependency : View) : Boolean {
+            child.translationY = (0f).coerceAtMost(dependency.translationY - dependency.height)
+            return true
+        }
+
+        override fun onDependentViewRemoved(parent : CoordinatorLayout, child : CustomLinearLayout, dependency : View) {
+            child.translationY = 0f
+        }
+    }
+}

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

@@ -3,6 +3,7 @@
 <androidx.coordinatorlayout.widget.CoordinatorLayout 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/coordinatorLayout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         tools:context=".MainActivity">
@@ -15,7 +16,7 @@
             android:layout_height="match_parent"
             app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
-    <LinearLayout
+    <emu.skyline.views.CustomLinearLayout
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_gravity="bottom|end"
@@ -39,6 +40,6 @@
                 android:layout_marginBottom="16dp"
                 app:maxImageSize="26dp"
                 app:srcCompat="@drawable/ic_log" />
-    </LinearLayout>
+    </emu.skyline.views.CustomLinearLayout>
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>