Android Check the Availability of Network Example

CHECK THE AVAILABILTY OF INTERNET

SOURCE CODE [main.xml] is

<?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">

<TextView android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello" />

<Button android:text="Check Network Status"

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />

</LinearLayout>

SOURCE CODE [NetworkCheck.java] is

package com.NetworkCheck;

import android.app.Activity;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class NetworkCheck extends Activity

{

Button check;

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

check = (Button) findViewById(R.id.button1);

check.setOnClickListener(new OnClickListener()

{

public void onClick(View v)

{

if(isInternetOn())

{

Toast.makeText(getBaseContext(), "Connected",

Toast.LENGTH_SHORT).show();

}

else

{

Toast.makeText(getBaseContext(), "Not connected",

Toast.LENGTH_SHORT).show();

}

}});

}

public final boolean isInternetOn()

{

ConnectivityManager connec = (ConnectivityManager) getSystemService

(Context.CONNECTIVITY_SERVICE);

if ((connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED)

||(connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTING)

||(connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTING)

||(connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED))

{

return true;

}

else if ((connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED)

|| (connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED))

{

return false;

}

return false;

}

}

Note:
Don’t forget to add   

in your AndroidManifest.xml.

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

The OUTPUT will be