Add GridLayout

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

@@ -6,38 +6,70 @@
     android:layout_height="match_parent"
     tools:context="de.mlte.soundboard.MainActivity">
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
-
-    <FrameLayout
+    <GridLayout
         android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-        <ProgressBar
-            android:id="@+id/progress_bar"
-            style="?android:attr/progressBarStyleHorizontal"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:indeterminate="false"
-            android:progressDrawable="@drawable/progress_bar_states" />
-
-        <TextView
-            android:id="@+id/text_view_button"
-            android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:columnCount="1"
+        android:padding="1dp">
+
+        <FrameLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_column="0"
+            android:layout_columnWeight="1"
+            android:layout_row="0"
+            android:layout_rowWeight="1"
+            android:padding="2dp">
+
+            <ProgressBar
+                android:id="@+id/progress_bar"
+                style="?android:attr/progressBarStyleHorizontal"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:indeterminate="false"
+                android:progressDrawable="@drawable/progress_bar_states" />
+
+            <TextView
+                android:id="@+id/text_view_button"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:padding="6dp"
+                android:text="Enter"
+                android:textColor="@android:color/white"
+                android:textSize="16sp"
+                android:textStyle="bold" />
+
+        </FrameLayout>
+
+        <FrameLayout
+            android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:gravity="center"
-            android:padding="6dp"
-            android:text="Enter"
-            android:textColor="@android:color/white"
-            android:textSize="16sp"
-            android:textStyle="bold" />
-
-    </FrameLayout>
+            android:layout_column="0"
+            android:layout_columnWeight="1"
+            android:layout_row="1"
+            android:layout_rowWeight="1"
+            android:padding="2dp">
+
+            <ProgressBar
+                style="?android:attr/progressBarStyleHorizontal"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:indeterminate="false"
+                android:progressDrawable="@drawable/progress_bar_states" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:padding="6dp"
+                android:text="Enter"
+                android:textColor="@android:color/white"
+                android:textSize="16sp"
+                android:textStyle="bold" />
+
+        </FrameLayout>
+
+    </GridLayout>
 
 </android.support.constraint.ConstraintLayout>