Android Connecting HTTP With AsyncTask Example, Original Post : http://devahoy.com/posts/android-asynctask-tutorial/

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:weightSum="1">
        <EditText
            android:id="@+id/text_url"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.8"/>

        <Button
            android:id="@+id/button_ok"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="0.2"
            android:text="OK"/>

        </LinearLayout>


    <WebView
        android:id="@+id/webView_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </WebView>

</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.phonbopit.sample" >

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.phonbopit.sample.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.java

package com.phonbopit.sample;

import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.EditText;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;


public class MainActivity extends ActionBarActivity {

    EditText mUrl;
    Button mButtonOK;
    WebView mWebView;

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

        mUrl = (EditText) findViewById(R.id.text_url);
        mButtonOK = (Button) findViewById(R.id.button_ok);
        mWebView = (WebView) findViewById(R.id.webView_content);


        mButtonOK.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {


/*                AsyncHttpClient client = new AsyncHttpClient();
                client.get(mUrl.getText().toString().trim(), new AsyncHttpResponseHandler() {
                    @Override
                    public void onSuccess(String response) {
                        updateWebView(response);
                    }
                });*/

                new SimpleTask().execute(mUrl.getText().toString().trim());
            }
        });
    }

    private class SimpleTask extends AsyncTask<String, Void, String> {

        @Override
        protected void onPreExecute() {
            // Create Show ProgressBar
        }

        protected String doInBackground(String... urls)   {
            String result = "";
            try {

                HttpGet httpGet = new HttpGet(urls[0]);
                HttpClient client = new DefaultHttpClient();

                HttpResponse response = client.execute(httpGet);

                int statusCode = response.getStatusLine().getStatusCode();

                if (statusCode == 200) {
                    InputStream inputStream = response.getEntity().getContent();
                    BufferedReader reader = new BufferedReader
                            (new InputStreamReader(inputStream));
                    String line;
                    while ((line = reader.readLine()) != null) {
                        result += line;
                    }
                }

            } catch (ClientProtocolException e) {

            } catch (IOException e) {

            }
            return result;
        }

        protected void onPostExecute(String result)  {
            // Dismiss ProgressBar
            updateWebView(result);
        }
    }

    private void updateWebView(String result) {
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.loadData(result, "text/html; charset=utf-8", "utf-8");
    }

}