Moved button to own class

app/src/main/java/de/mlte/soundboard/MainActivity.kt

@@ -88,18 +88,8 @@ class MainActivity : AppCompatActivity() {
 
         for (row in 0..1) {
             for (col in 0..1) {
-                val newFrame = inflater.inflate(R.layout.layout_button, null)
-                // newFrame.findViewById<ProgressBar>(R.id.progress_bar)
-                // newFrame.findViewById<TextView>(R.id.text_view_button)
-
-                val params = GridLayout.LayoutParams()
-                params.columnSpec = GridLayout.spec(col, 1, 1.0f)
-                params.rowSpec = GridLayout.spec(row, 1, 1.0f)
-                params.width = 0
-                params.height = 0
-                newFrame.layoutParams = params
-
-                parent.addView(newFrame)
+                val soundButton = SoundButton(this, col, row)
+                parent.addView(soundButton)
             }
         }
     }

app/src/main/java/de/mlte/soundboard/SoundButton.kt

@@ -0,0 +1,19 @@
+package de.mlte.soundboard
+
+import android.content.Context
+import android.view.View
+import android.widget.FrameLayout
+import android.widget.GridLayout
+
+class SoundButton : FrameLayout {
+    constructor(context: Context, col: Int, row: Int) : super(context) {
+        View.inflate(context, R.layout.layout_button, this)
+
+        val params = GridLayout.LayoutParams()
+        params.columnSpec = GridLayout.spec(col, 1, 1.0f)
+        params.rowSpec = GridLayout.spec(row, 1, 1.0f)
+        params.width = 0
+        params.height = 0
+        layoutParams = params
+    }
+}

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

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="wrap_content"
-    android:layout_height="wrap_content"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
     android:padding="2dp">
     <ProgressBar
         android:id="@+id/progress_bar"