How to Check Internet Connection in Android?

First Create New Android Project and Give the Project Name "NetworkCheckDemo".

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent" android:layout_height="fill_parent">
    <TextView android:layout_width="wrap_content"
        android:layout_height="wrap_content" android:id="@+id/txtviewstatus"
        android:text="Dipak Keshariya" android:textSize="24dip"
        android:textStyle="bold" android:layout_gravity="center" />
</LinearLayout>


NetworkCheckDemo.java

package com.android.networkcheckdemo;

import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class NetworkCheckDemo extends Activity
{
    TextView tvstatus;
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        tvstatus=(TextView)findViewById(R.id.txtviewstatus);
        ConnectivityManager cn=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo nf=cn.getActiveNetworkInfo();
        if(nf != null && nf.isConnected()==true )
        {
            Toast.makeText(this, "Network Available", Toast.LENGTH_LONG).show();
            tvstatus.setText("Network Available");
        }
        else
        {
            Toast.makeText(this, "Network Not Available", Toast.LENGTH_LONG).show();
            tvstatus.setText("Network Not Available");
        }
    }
}

Add below 3 permissions in Android Manifest File.

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


After changes in manifest file your AndroidManifest file look like this.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.drc.Video" android:versionCode="1" android:versionName="1.0">
    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".NetworkCheckDemo" 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>
    <uses-sdk android:minSdkVersion="8" />
</manifest>


Then Save it & Run the Program.

The Output is look like this.

if Connection is Available :-

if Connection is Not Avaiolable :-

then the checking is over and now you can check internet connection successfully using this code

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