How to parse HTML in android?

AndroidApps/ApplicationsMobile Development

This example demonstrates how do I parse HTML in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/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:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="12sp"
   tools:context=".MainActivity">
   <Button
      android:id="@+id/btnParseHTML"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Get website"
      android:layout_marginTop="40dp"
      android:layout_centerHorizontal="true"/>
   <TextView
      android:id="@+id/textView"
      android:text="Result"
      android:textSize="12sp"
      android:textStyle="bold"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/btnParseHTML"
      android:layout_centerHorizontal="true"/>
</RelativeLayout>

Step 3 – Add the given dependency in the build.gradle (Module: app)

implementation 'org.jsoup:jsoup:1.11.2'

Step 4 − Add the following code to src/MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
   Button button;
   TextView textView;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      textView = findViewById(R.id.textView);
      button = findViewById(R.id.btnParseHTML);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            getHtmlFromWeb();
         }
      });
   }
   private void getHtmlFromWeb() {
      new Thread(new Runnable() {
         @Override
         public void run() {
            final StringBuilder stringBuilder = new StringBuilder();
            try {
               Document doc = Jsoup.connect("http://www.tutorialspoint.com/").get();
               String title = doc.title();
               Elements links = doc.select("a[href]");
               stringBuilder.append(title).append("\n");
               for (Element link : links) {
                  stringBuilder.append("\n").append("Link : ").append(link.attr("href")).append("\n").append("Text : ").append(link.text());
               }
            } catch (IOException e) {
               stringBuilder.append("Error : ").append(e.getMessage()).append("\n");
            }
            runOnUiThread(new Runnable() {
               @Override
               public void run() {
                  textView.setText(stringBuilder.toString());
               }
            });
         }
      }).start();
   }
}

Step 5 - Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <uses-permission android:name="android.permission.INTERNET" />
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run Play Icon icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –

Click here to download the project code.

raja
Published on 30-Aug-2019 14:57:30
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