Android URL unfurling example

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.example.unfurl.MainActivity">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <TextView
                android:id="@+id/title_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textStyle="bold"/>
            <TextView
                android:id="@+id/description_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"/>
            <ImageView
                android:id="@+id/image_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"/>
        </LinearLayout>
    </ScrollView>
</RelativeLayout>

MainActivity.java

package com.example.unfurl;

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.IOException;

import butterknife.BindView;
import butterknife.ButterKnife;

/**
 * A simple example of how to use Jsoup to parse HTML metadata to create unfurled previews.
 * See the excellent Slack developer post for more info on "unfurling":
 * https://medium.com/slack-developer-blog/everything-you-ever-wanted-to-know-about-unfurling-but-were-afraid-to-ask-or-how-to-make-your-e64b4bb9254#.tnspdgalr
 */
public class MainActivity extends AppCompatActivity {

    String xperiaUrl = "https://www.komplett" +
            ".se/product/886519/mobil/mobil/mobiltelefon/sony-xperia-x-performance-32gb-svart";

    @BindView(R.id.html_view) TextView htmlView;
    @BindView(R.id.title_view) TextView titleView;
    @BindView(R.id.description_view) TextView descriptionView;
    @BindView(R.id.image_view) ImageView imageView;

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

        UnfurlWebUrlTask unfurl = new UnfurlWebUrlTask();
        unfurl.execute(xperiaUrl);
    }

    class UnfurlWebUrlTask extends AsyncTask<String, Void, UnfurlResult> {
        @Override
        protected UnfurlResult doInBackground(String... params) {
            try {
                //<meta property=og:title" content="Content title">
                //<meta property=og:description" content="Content description">
                //<meta property=og:image" content="Image url">
                Document doc = Jsoup.connect(params[0]).get();
                Elements metaProperties = doc.select("meta[property]");
                UnfurlResult result = new UnfurlResult();
                for (Element element : metaProperties) {
                    // TODO: Quick and dirty, this could probably be improved
                    String property = element.attr("property");
                    if (TextUtils.isEmpty(property)) {
                        continue;
                    }
                    switch (property) {
                        case "og:title":
                            result.title = element.attr("content");
                            break;
                        case "og:description":
                            result.description= element.attr("content");
                            break;
                        case "og:image":
                            result.imageUrl = element.attr("content");
                            break;
                        default:
                            break;
                    }
                }
                return result;
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(UnfurlResult result) {
            super.onPostExecute(result);
            titleView.setText(result.title);
            descriptionView.setText(result.description);
            Glide.with(getApplicationContext()).load(result.imageUrl).into(imageView);
        }
    }

    class UnfurlResult {
        String title;
        String description;
        String imageUrl;

        UnfurlResult() {

        }
    }
}