Android Detect Internet Connection Status

In most of the application running in android needs internet.So it is very important in every application to check whether the internet is available or not.

STEP BY STEP

1.Create a new Android Project.

Read:-How to create an Android Project

2.After creating the project,add the required permissions in your
AndroidManifest.xml file.

To access the internet we need internet permission.
To detect network status we need ACCESS_NETWORK_STATE permission.

Copy paste the bellow code.

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

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

package="com.example.detectinternetconnection"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk android:minSdkVersion="8" />

<application

android:icon="@drawable/ic_launcher"

android:label="@string/app_name" >

<activity

android:name=".AndroidDetectInternetConnectionActivity"

android:label="@string/app_name" >

<intent-filter>

</intent-filter>

</activity>

</application>

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

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

</manifest>

To add the permission manually.Take AndroidManifest.xml

Then take Permissions-->Add-->Uses Permissions-->Select the required permissions from the combo box provided.

3.Create a class file named as ConnectionDetector.java and apply the
following code.

4.Whenever user needs to check the internet connection,we use the function 

   called isConnectingToInternet() 

ConnectionDetector cd = new ConnectionDetector(getApplicationContext()); Boolean isInternetPresent = cd.isConnectingToInternet(); // true or false

5.In this tutorial,i am placing a button to show the internet status by a click.

6.Open the main.xml file and copy the bellow code. 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com

   /apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >
  <TextView
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:text="Detect Internet Status" />
  <Button android:id="@+id/btn_check"
      android:layout_height="wrap_content"
      android:layout_width="wrap_content"
      android:text="Check Internet Status"
      android:layout_centerInParent="true"/>
<RelativeLayout>





7.Finally paste the given bellow code to your MainActivity.class file


package com.roney.detectinternetconnection;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class AndroidDetectInternetConnectionActivity 
extends Activity 
{
// flag for Internet connection status
Boolean isInternetPresent = false;
// Connection detector class
ConnectionDetector cd;
@Override
public void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btnStatus = (Button) findViewById(R.id.btn_check);
// creating connection detector class instance
cd = new ConnectionDetector(getApplicationContext());
/**
*Check Internet status button click event
* */
btnStatus.setOnClickListener(new View.OnClickListener() 
{
@Override
public void onClick(View v) 
{
// get Internet status
isInternetPresent = cd.isConnectingToInternet();
// check for Internet status
if (isInternetPresent) 
{
// Internet Connection is Present
// make HTTP requests
showAlertDialog(AndroidDetectInternetConnectionActivity.this,
                    "Internet Connection",
                    "You have internet connection", true);
}
else 
{
// Internet connection is not present
// Ask user to connect to Internet
showAlertDialog(AndroidDetectInternetConnectionActivity.this,
                    "No Internet Connection",
                    "You don't have internet connection.", false);
}
}
});
}
    /**
     * Function to display simple Alert Dialog
     * @param context - application context
     * @param title - alert dialog title
     * @param message - alert message
     * @param status - success/failure (used to set icon)
     * */
public void showAlertDialog(Context context, String title,
                           String message, Boolean status) 
{
AlertDialog alertDialog = new AlertDialog.Builder(context).create();
// Setting Dialog Title
alertDialog.setTitle(title);
// Setting Dialog Message
alertDialog.setMessage(message);
// Setting alert dialog icon
alertDialog.setIcon((status) ? R.drawable.success : R.drawable.fail);
// Setting OK Button
alertDialog.setButton("OK", new DialogInterface.OnClickListener() 
{
public void onClick(DialogInterface dialog, int which) 
{
}
});
// Showing Alert Message
alertDialog.show();
}
}





8.Output is shown bellow.

















If you need to run this application in the android smartphone



Refer:How to run application in the android smartphone


Hope you understand how it works.



" Ask your doubts and comments please "

Android Tutorial

Tuesday, 4 December 2012