Improved fab speed dial

app/src/main/java/ch/dissem/apps/abit/util/FabUtils.java

@@ -0,0 +1,35 @@
+package ch.dissem.apps.abit.util;
+
+import android.support.annotation.DrawableRes;
+import android.support.design.widget.FloatingActionButton;
+
+import ch.dissem.apps.abit.MainActivity;
+import ch.dissem.apps.abit.R;
+import io.github.kobakei.materialfabspeeddial.FabSpeedDial;
+import io.github.kobakei.materialfabspeeddial.FabSpeedDialMenu;
+
+/**
+ * Utilities to work with the common floating action button in the main activity
+ */
+public class FabUtils {
+    public static FabSpeedDial initFab(MainActivity activity, final @DrawableRes int drawableRes, FabSpeedDialMenu menu) {
+        FabSpeedDial fab = activity.getFloatingActionButton();
+        fab.show();
+        fab.closeMenu();
+        final FloatingActionButton mainFab = fab.getMainFab();
+        mainFab.setImageResource(drawableRes);
+        fab.setMenu(menu);
+        fab.addOnStateChangeListener(new FabSpeedDial.OnStateChangeListener() {
+            @Override
+            public void onStateChange(boolean isOpened) {
+                if (isOpened) {
+                    // It will be turned 45 degrees, which makes an x out of the +
+                    mainFab.setImageResource(R.drawable.ic_action_add);
+                } else {
+                    mainFab.setImageResource(drawableRes);
+                }
+            }
+        });
+        return fab;
+    }
+}