Introduced material design icons.

src/main/java/de/dennisguse/opentracks/util/ResourceUtils.java

@@ -0,0 +1,17 @@
+package de.dennisguse.opentracks.util;
+
+import android.content.Context;
+
+/**
+ * Utils related to handling Android resources.
+ */
+public class ResourceUtils {
+
+    /**
+     * Convert display density to physical pixel.
+     */
+    public static int dpToPx(Context context, int dp) {
+        float density = context.getResources().getDisplayMetrics().density;
+        return Math.round(dp * density);
+    }
+}