Android - Check the availability of Internet 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

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

in your AndroidManifest.xml.

The OUTPUT will be