How to get Google blogger post in ionic-v3

I found a code to get google blogger post and open single post, but i’m getting 10 last post so i don’t know how can i get more post or open them in next page using next page token…please help.

home.html

<ion-header>
  <ion-navbar>
  <ion-title style="padding: 0;">
    {{ title }}
  </ion-title>
</ion-navbar>
</ion-header>
<ion-content padding>
  <ion-list>
  	<ion-item ion-item *ngFor="let post of posts" (click)="openPost(post)">
  	<ion-avatar item-left>
      <img src="{{ post.author.image }}">
    </ion-avatar>
    <h2 [innerHTML]="post.title"></h2>
    <p [innerHTML]="post.author.displayName"></p>
</ion-item>
</ion-list>
</ion-content>

home.ts

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';

//Import the Http library and add it to the constructor.
//Import the Constants provider and add it to the constructor.
import { Http } from '@angular/http';
import { ConstantsProvider } from '../../providers/constants/constants';

//Import the post page
import { PostPage } from '../post/post';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

	//Create a property for the title of the blog.
	//Create a property for the list of blog posts.
	title: string;
	posts: any[];

  constructor(public navCtrl: NavController, public constants: ConstantsProvider, public http: Http) {
	  	http.get('https://www.googleapis.com/blogger/v3/blogs/byurl?key=' + constants.getApiKey() + '&url=' + constants.getUrl())
	  .subscribe(response => {
	    let data = response.json();
	    this.title = data.name;
	    this.getPosts(data.posts.selfLink);
	  });
  }

  //Create a getPosts() function
  getPosts(url:string) {
  this.http.get(url+'?key='+this.constants.getApiKey())
    .subscribe(response => {
      let data = response.json();
      console.log(data);
      this.posts = data.items;
    });
 }

  //Create and openPost(post) function to open the post page and pass the selected post as a parameter.
  openPost(post) {
    this.navCtrl.push(PostPage, {post:post})
  }

}