add a Save button to events

app/src/main/java/com/simplemobiletools/calendar/activities/EventActivity.java

@@ -5,6 +5,8 @@ import android.app.TimePickerDialog;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.widget.DatePicker;
 import android.widget.TextView;
@@ -52,6 +54,27 @@ public class EventActivity extends AppCompatActivity {
         updateEndTime();
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu_event, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.save:
+                saveEvent();
+                return true;
+            default:
+                return super.onOptionsItemSelected(item);
+        }
+    }
+
+    private void saveEvent() {
+
+    }
+
     private void updateStartDate() {
         mStartDate.setText(Formatter.getEventDate(mEventStartDateTime));
     }

app/src/main/res/menu/menu_event.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+      xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/save"
+        android:icon="@mipmap/check"
+        android:title="@string/save"
+        app:showAsAction="ifRoom"/>
+</menu>

app/src/main/res/values/strings.xml

@@ -3,6 +3,7 @@
 
     <!-- Event -->
     <string name="event">Event</string>
+    <string name="save">Save</string>
 
     <!-- Details -->
     <string name="details">Details</string>