Button done

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

@@ -1,12 +1,27 @@
 package de.mlte.soundboard
 
-import android.support.v7.app.AppCompatActivity
+import android.animation.ObjectAnimator
 import android.os.Bundle
+import android.support.v7.app.AppCompatActivity
+import android.widget.ProgressBar
+import android.widget.TextView
 
 class MainActivity : AppCompatActivity() {
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        val progressBar = findViewById<ProgressBar>(R.id.progress_bar)
+        val objectAnimator = ObjectAnimator.ofInt(progressBar, "progress", progressBar.getProgress(), 100).setDuration(2000)
+        val btn = findViewById<TextView>(R.id.text_view_button)
+
+        objectAnimator.addUpdateListener({ valueAnimator ->
+            val progress = valueAnimator.animatedValue as Int
+            progressBar.progress = progress
+        })
+
+        btn.setOnClickListener {
+            objectAnimator.start()
+        }
     }
 }

app/src/main/res/drawable/progress_bar_states.xml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:id="@android:id/background">
+        <shape>
+            <gradient
+                android:startColor="#777777"
+                android:centerColor="#333333"
+                android:centerY="0.75"
+                android:endColor="#222222"
+                android:angle="270"
+                />
+        </shape>
+    </item>
+
+    <item android:id="@android:id/secondaryProgress">
+        <clip>
+            <shape>
+                <gradient
+                    android:startColor="#234"
+                    android:centerColor="#234"
+                    android:centerY="0.75"
+                    android:endColor="#a24"
+                    android:angle="270"
+                    />
+            </shape>
+        </clip>
+    </item>
+
+    <item android:id="@android:id/progress">
+        <clip>
+            <shape>
+                <gradient
+                    android:startColor="#999999"
+                    android:centerColor="#777777"
+                    android:centerY="0.75"
+                    android:endColor="#555555"
+                    android:angle="270"
+                    />
+            </shape>
+        </clip>
+    </item>
+
+</layer-list>

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

@@ -15,4 +15,29 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <FrameLayout
+        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="wrap_content"
+            android:gravity="center"
+            android:padding="6dp"
+            android:text="Enter"
+            android:textColor="@android:color/white"
+            android:textSize="16sp"
+            android:textStyle="bold" />
+
+    </FrameLayout>
+
 </android.support.constraint.ConstraintLayout>