Android Adding the Action Bar

/res/menu/main_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:id="@+id/itemShare"
        android:icon="@drawable/ic_share_white_24dp"
        android:title="@string/share"
        app:showAsAction="always" />
    <item
        android:id="@+id/itemSearch"
        android:icon="@drawable/ic_share_white_24dp"
        android:title="@string/search" />
</menu>

MainActivity.java

public class MainActivity extends AppCompatActivity {

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

        ActionBar actionBar=getSupportActionBar();

        actionBar.setLogo(R.drawable.ic_android_white_24dp);
        actionBar.setDisplayUseLogoEnabled(true);
        actionBar.setDisplayShowHomeEnabled(true);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.main_menu,menu);

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId())
        {
            case R.id.itemSearch:
                Toast.makeText(getBaseContext(),"Search",Toast.LENGTH_LONG).show();
                break;
            case R.id.itemShare:
                Toast.makeText(getBaseContext(),"Share",Toast.LENGTH_LONG).show();
                break;
        }

        return super.onOptionsItemSelected(item);
    }
}

References
https://github.com/mhdr/AndroidSamples/tree/master/038