MainActivity.java

package com.jonesrandom.optionsmenutoolbar;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Toolbar myToolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myToolbar = (Toolbar) findViewById(R.id.my_toolbar);

        /// mengatur Toolbar kedalam Support Action Bar
        setSupportActionBar(myToolbar);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        /// Meng inflate file Menu
        getMenuInflater().inflate(R.menu.my_menu, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int ID = item.getItemId();

        switch (ID) {
            case R.id.menu_1:
                Toast.makeText(MainActivity.this, "Agan Klik Menu 1", Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_2:
                Toast.makeText(MainActivity.this, "Agan Klik Menu 2", Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_3:
                Toast.makeText(MainActivity.this, "Agan Klik Menu 3", Toast.LENGTH_SHORT).show();
                break;

        }
        return super.onOptionsItemSelected(item);
    }
}