Android http

--> Android HTTP URL Connection

HttpConnActivity.java Code

package android.example.http;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

public class HttpConnActivity extends Activity {

   

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

       

        final TextView tv = (TextView)findViewById(R.id.tv);

       

        Button bn = (Button)findViewById(R.id.bn);

       

        bn.setOnClickListener(new OnClickListener() {

                  public void onClick(View v) {

                        HttpURLConnection conn = null;

                       

                      try {

                        conn = (HttpURLConnection)new URL("http://www.google.com").openConnection();

                                   

                        conn.setRequestMethod("GET");

                          conn.setInstanceFollowRedirects(true);

                          conn.setUseCaches(false);

                           

                        int resCode = conn.getResponseCode();

                        if (resCode == HttpURLConnection.HTTP_OK) {            

                              InputStream is = conn.getInputStream();

                              ByteArrayOutputStream bos = new ByteArrayOutputStream();

                              int read = 0;

                              while ((read = is.read()) != -1) {

                                    bos.write(read);

                              }

                              byte[] result = bos.toByteArray();

                              bos.close();

                                   

                              String data = new String(result);

                              tv.setText(data.substring(0, 500));

                        }

                        else {

                              tv.setText("resCode: " + resCode);

                        }

                                               

                        conn.disconnect();

                      }

                      catch (Exception e) {

                      }              

                       

                  }

            });

    }

}

main.xml Code

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#f8b54b"

    android:orientation="vertical" >

   

    <Button

        android:id="@+id/bn"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:textColor="#000000"

        android:text="Get http" />

    <TextView

        android:id="@+id/tv"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:textColor="#000000"

        android:layout_marginLeft="5dp"

        android:layout_marginRight="5dp"

        android:layout_marginTop="10dp"

        android:background="#4bf853"

        android:text="Data from http" />

</LinearLayout>

AndroidManifest.xml  Code

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="android.example.http"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="7" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:label="@string/app_name"

            android:name=".HttpConnActivity" >

            <intent-filter >

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

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

       

</manifest>

Download Android HTTP Example Code -->

Android Control ควบคุมอุปกรณ์ต่างๆ ด้วย Android

http://androidcontrol.blogspot.com

สอนเขียน Android  สอนเขียนโปรแกรม Android

http://androidcontrol.blogspot.com/2012/01/beginning-android-training-android.html

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