diff --git a/src/main/java/org/androidsoft/coloring/ui/activity/AbstractColoringActivity.java b/src/main/java/org/androidsoft/coloring/ui/activity/AbstractColoringActivity.java
index 21412d1..e159ed7 100644
--- a/src/main/java/org/androidsoft/coloring/ui/activity/AbstractColoringActivity.java
+++ b/src/main/java/org/androidsoft/coloring/ui/activity/AbstractColoringActivity.java
@@ -24,6 +24,8 @@
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowManager;
+
+import org.androidsoft.coloring.util.ScreenUtils;
 import org.androidsoft.utils.ui.NoTitleActivity;
 
 public abstract class AbstractColoringActivity extends NoTitleActivity
@@ -37,6 +39,7 @@ public abstract class AbstractColoringActivity extends NoTitleActivity
     public void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
+        ScreenUtils.setFullscreen(this);
 
         WindowManager w = getWindowManager();
         Display d = w.getDefaultDisplay();
@@ -45,6 +48,14 @@ public void onCreate(Bundle savedInstanceState)
         
     }
 
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus) {
+        super.onWindowFocusChanged(hasFocus);
+        if (hasFocus) {
+            ScreenUtils.setFullscreen(this);
+        }
+    }
+
     public static int getDisplayWitdh()
     {
         return _displayWidth;
diff --git a/src/main/java/org/androidsoft/coloring/ui/activity/CreditsActivity.java b/src/main/java/org/androidsoft/coloring/ui/activity/CreditsActivity.java
index 8c8aed6..e3c295a 100644
--- a/src/main/java/org/androidsoft/coloring/ui/activity/CreditsActivity.java
+++ b/src/main/java/org/androidsoft/coloring/ui/activity/CreditsActivity.java
@@ -18,6 +18,7 @@
 import android.os.Bundle;
 import android.view.View;
 import org.androidsoft.coloring.R;
+import org.androidsoft.coloring.util.ScreenUtils;
 import org.androidsoft.utils.credits.CreditsParams;
 import org.androidsoft.utils.credits.CreditsView;
 import org.androidsoft.utils.ui.BasicActivity;
@@ -33,12 +34,22 @@ public class CreditsActivity extends BasicActivity
     public void onCreate(Bundle icicle)
     {
         super.onCreate(icicle);
+        ScreenUtils.setFullscreen(this);
 
         View view = new CreditsView(this, getCreditsParams());
         setContentView(view);
 
     }
 
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus)
+    {
+        super.onWindowFocusChanged(hasFocus);
+        if (hasFocus) {
+            ScreenUtils.setFullscreen(this);
+        }
+    }
+
     /**
      * {@inheritDoc } 
      */
diff --git a/src/main/java/org/androidsoft/coloring/ui/activity/StartNewActivity.java b/src/main/java/org/androidsoft/coloring/ui/activity/StartNewActivity.java
index 29cac4d..f0b7bb8 100644
--- a/src/main/java/org/androidsoft/coloring/ui/activity/StartNewActivity.java
+++ b/src/main/java/org/androidsoft/coloring/ui/activity/StartNewActivity.java
@@ -31,6 +31,7 @@
 import android.widget.GridView;
 import android.widget.ImageView;
 import org.androidsoft.coloring.R;
+import org.androidsoft.coloring.util.ScreenUtils;
 import org.androidsoft.utils.ui.NoTitleActivity;
 
 public class StartNewActivity extends NoTitleActivity implements View.OnClickListener
@@ -46,7 +47,7 @@ public static int randomOutlineId()
     public void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
-
+        ScreenUtils.setFullscreen(this);
         // Apparently this cannot be set from the style.
         getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,
                 WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
@@ -57,6 +58,15 @@ public void onCreate(Bundle savedInstanceState)
         gridview.setAdapter(new ImageAdapter(this));
     }
 
+    @Override
+    public void onWindowFocusChanged(boolean hasFocus)
+    {
+        super.onWindowFocusChanged(hasFocus);
+        if (hasFocus) {
+            ScreenUtils.setFullscreen(this);
+        }
+    }
+
     public void onClick(View view)
     {
         setResult(view.getId());
diff --git a/src/main/java/org/androidsoft/coloring/util/ScreenUtils.java b/src/main/java/org/androidsoft/coloring/util/ScreenUtils.java
new file mode 100644
index 0000000..ed671e8
--- /dev/null
+++ b/src/main/java/org/androidsoft/coloring/util/ScreenUtils.java
@@ -0,0 +1,17 @@
+package org.androidsoft.coloring.util;
+
+import android.app.Activity;
+import android.view.View;
+
+// Based on http://stackoverflow.com/questions/22265945/full-screen-action-bar-immersive#22560946
+public class ScreenUtils {
+    static public void setFullscreen(Activity act) {
+        if (android.os.Build.VERSION.SDK_INT >= 19) {
+            act.getWindow().getDecorView().setSystemUiVisibility(
+                      View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
+                    | View.SYSTEM_UI_FLAG_FULLSCREEN
+                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
+        }
+    }
+}