Cara Modifikasi Toolbar Activity di Android Studio

Ini adalah catatan singkat cara untuk modifikasi toolbar pada suatu activity di aplikasi android yang sedang kita buat. Perhatikan baris toolbar di activity.

Layout XML activity_pengaturan.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:background="?attr/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        android:theme="?attr/actionBarTheme"
        app:subtitle="Detail App dan Vendor"
        app:title="About" />
</RelativeLayout>

Script untuk Modifikasi Toolbar di About.java

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;

public class About extends AppCompatActivity {
    private Toolbar toolbar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pengaturan);
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("About");
        toolbar.setSubtitle("Detail App dan Vendor");
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }
}

Script Activity di AndroidManifest.xml

<activity
            android:name=".About"
            android:parentActivityName=".Main" />