IntentService Example

Hello friends
Today we are learn about how to use IntentService in your app.

actvity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:paddingLeft="10dp">

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="IntentService and BroadcastReceiver Example"
        android:textSize="16sp"
        android:paddingTop="20dp" />

    <Button
        android:layout_gravity="center"
        android:text="Send Request"
        android:id="@+id/sendRequest"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <LinearLayout
        android:layout_width="match_parent"
        android:id="@+id/linearLayout1"
        android:layout_height="wrap_content">

        <TextView
            android:text="Response Url"
            android:layout_height="wrap_content"
            android:id="@+id/textView1"
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:layout_width="wrap_content"
            android:paddingTop="25dp" />

        <TextView android:text=""
            android:layout_height="wrap_content"
            android:id="@+id/response"
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:layout_width="wrap_content"
            android:layout_marginLeft="10dp" />

    </LinearLayout>

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

MainActivity.java

package com.samset.intentservicesample;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.Window;
import android.webkit.WebView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class MyActivity extends Activity {

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

        IntentFilter filter = new IntentFilter(MyIntentService.PROCESS_RESPONSE);
        filter.addCategory(Intent.CATEGORY_DEFAULT);
        receiver = new MyBroadcastReciver();
        registerReceiver(receiver, filter);

        Button addButton = (Button) findViewById(R.id.sendRequest);
        addButton.setOnClickListener(new View.OnClickListener() {
            public void onClick(View view) {

                Intent msgIntent = new Intent(MyActivity.this, MyIntentService.class);

                msgIntent.putExtra(MyIntentService.REQUEST_STRING, "http://www.amazon.com");
                startService(msgIntent);

                msgIntent.putExtra(MyIntentService.REQUEST_STRING, "https://github.com/SamsetDev?tab=repositories");
                startService(msgIntent);

                msgIntent.putExtra(MyIntentService.REQUEST_STRING, "http://samsetdev.blogspot.in/");
                startService(msgIntent);
            }
        });
    }

    @Override
    public void onDestroy() {
        this.unregisterReceiver(receiver);
        super.onDestroy();
    }
    class MyBroadcastReciver extends BroadcastReceiver
    {

        @Override
        public void onReceive(Context context, Intent intent) {

            String responseString = intent.getStringExtra(MyIntentService.RESPONSE_STRING);
            String reponseMessage = intent.getStringExtra(MyIntentService.RESPONSE_MESSAGE);

            TextView myTextView = (TextView) findViewById(R.id.response);
            myTextView.setText(responseString);

            WebView myWebView = (WebView) findViewById(R.id.myWebView);
            myWebView.getSettings().setJavaScriptEnabled(true);
            try {
                myWebView.loadData(URLEncoder.encode(reponseMessage,"utf-8").replaceAll("\\+"," "), "text/html", "UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }

        }
    }
}

MyIntentService.java

package com.samset.intentservicesample;

import android.app.IntentService;
import android.content.Intent;
import android.os.SystemClock;
import android.text.format.DateFormat;
import android.util.Log;

import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import java.io.IOException;

/**
 * Created by weesync on 23/05/16.
 */
public class MyIntentService extends IntentService {

    public static final String REQUEST_STRING = "myRequest";
    public static final String RESPONSE_STRING = "myResponse";
    public static final String RESPONSE_MESSAGE = "myResponseMessage";

    private String URL = null;
    private static final int REGISTRATION_TIMEOUT = 3 * 1000;
    private static final int WAIT_TIMEOUT = 30 * 1000;
    public static final String PROCESS_RESPONSE = "com.samset.intentservicesample.intent.action.PROCESS_RESPONSE";

    private static OkHttpClient okHttpClient;
    private static String strdata;

    public MyIntentService() {
        super("MyService");
    }


    @Override
    protected void onHandleIntent(Intent intent) {
        String requestString = intent.getStringExtra(REQUEST_STRING);
        String responseString = requestString + " " + DateFormat.format("MM/dd/yy h:mmaa", System.currentTimeMillis());

        SystemClock.sleep(10000); // Wait 10 seconds
        Log.v("MyWebRequestService:", responseString);
        String output = getDataFromserver(requestString);
        broadcastData(responseString, output);


    }

    private void broadcastData(String data, String msg) {

        Intent broadcastIntent = new Intent();
        broadcastIntent.setAction(PROCESS_RESPONSE);
        broadcastIntent.addCategory(Intent.CATEGORY_DEFAULT);
        broadcastIntent.putExtra(RESPONSE_STRING, data);
        broadcastIntent.putExtra(RESPONSE_MESSAGE, msg);
        sendBroadcast(broadcastIntent);
    }

    public static String getDataFromserver(String url) {
        okHttpClient = new OkHttpClient();
        Request request = new Request.Builder().url(url).build();

        Response response = null;

        try {
            response = okHttpClient.newCall(request).execute();
            strdata = response.body().string();


        } catch (IOException e) {
            e.printStackTrace();
        }
        return strdata;
    }

}

AndroidMainifest.xml

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

    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MyActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- Declaring Service in Manifest -->
      <service
          android:name=".MyIntentService"
          android:exported="false"/>
    </application>

</manifest>

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.3"

    defaultConfig {
        applicationId "com.samset.intentservicesample"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.squareup.okhttp:okhttp:2.4.0'
    compile 'com.squareup.picasso:picasso:2.5.2'
}

thank you

FullSourceCode IntentServiceSample

Live Sample