Android Programming Tutorial 42 : WebServices Using GET Method In Android

Create Android Application:

• File >> New >> Android Application
• Enter Project name: WebServicesUsingGETApp
• Package: com.ambilpursunil.newapp
• Keep other default selections, click Next until you reach Finish

                               

 1.Simply Copy and Past the Code which is display below in the  MainActivity.java 

package com.ambilpursunil.newapp;

import java.io.IOException;

import java.io.InputStream;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.protocol.BasicHttpContext;

import org.apache.http.protocol.HttpContext;

import android.app.Activity;

import android.os.AsyncTask;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity implements OnClickListener {

            Button my_button;

            @Override

            protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

            findViewById(R.id.btn_REST).setOnClickListener(this);

             }

            @Override

            public void onClick(View v) {

            my_button = (Button) findViewById(R.id.btn_REST);

            my_button.setClickable(false);

            new GetDataRESTfull().execute();

            }

public class GetDataRESTfull extends AsyncTask<Void, Void, String> {

            protected String getASCIIContentFromEntity(HttpEntity entity)

            throws IllegalStateException, IOException {

            InputStream inputStream = entity.getContent();

            StringBuffer stringBuffer = new StringBuffer();

            int n = 1;

            while (n > 0) {

            byte[] b = new byte[4096];

            n = inputStream.read(b);

            if (n > 0)

            stringBuffer.append(new String(b, 0, n));

            }// while

            return stringBuffer.toString();

            }// getASCII

            @Override

            protected String doInBackground(Void... params) {

            HttpClient httpClient = new DefaultHttpClient();

            HttpContext httpContext = new BasicHttpContext();

            //Here we are Using GET Method 

             

            HttpGet httpGet = new HttpGet(

 "http://www.cheesejedi.com/rest_services/get_big_cheese.php?puzzle=1");

            String text = null;

            try {

HttpResponse httpResponse = httpClient.execute(httpGet,

            httpContext);

            HttpEntity httpEntity = httpResponse.getEntity();

            text = getASCIIContentFromEntity(httpEntity);

           } catch (Exception e) {

           e.getLocalizedMessage();

           }

           return text;

          }// doInBack

          @Override

          protected void onPostExecute(String result) {

          if (result != null) {

  EditText editTextREST = (EditText) findViewById(R.id.editTextREST);

          editTextREST.setText(result);

          }// if

          my_button.setClickable(true);

                        }// doPost

            }

}

 2.Simple Copy and Past the below code:  actvitiy_main.xml

<LinearLayout 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:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="RESTful WebServices"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="#176CEC"

        android:gravity="center" />

    <Button

        android:id="@+id/btn_REST"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="GET Data"

        android:layout_marginLeft="100dp"

        android:padding="14dp" />

    <EditText

        android:id="@+id/editTextREST"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:minLines="13"

        android:editable="false"

        android:textSize="12sp"

        android:maxLines="13"

        android:ems="10" />

</LinearLayout>

3.Copy and past the code for manifest.xml

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

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

    package="com.ambilpursunil.newapp"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="18"

        android:targetSdkVersion="18" />

    <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=".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>

4.Right click on the project and Run As-->Android Application

OutPut:

When our application launch you will find a GET Button and a EditText simply click on the GET Button and see the output on the screen.

Please Send Your Comments To ambilpura.sunil@gmail.com

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