Internet Connection Checking in Android

Activity_Main.XML

<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=" 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>

MainActivity.Java

package com.example.raji;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

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 MainActivity extends Activity {

   

    Boolean isInternetPresent = false;

     

    

    ConnectionDetector cd;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        Button btnStatus = (Button) findViewById(R.id.btn_check);

        // creating connection detector class instance

        cd = new ConnectionDetector(this);

        

        btnStatus.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                 

              

                isInternetPresent = cd.isConnectingToInternet();

               

                if (isInternetPresent) {

                    

                    showAlertDialog(MainActivity.this, "Internet Connection",

                            "You have internet connection", true);

                } else {

                    

                    showAlertDialog(MainActivity.this, "No Internet Connection",

                            "You don't have internet connection.", false);

                }

            }

        });

    }

    @SuppressWarnings("deprecation")

public void showAlertDialog(Context context, String title, String message, Boolean status) {

        AlertDialog alertDialog = new AlertDialog.Builder(context).create();

        

        alertDialog.setTitle(title);

        

        alertDialog.setMessage(message);

         

        

        alertDialog.setIcon((status) ? R.drawable.ic_launcher : R.drawable.ic_launcher);

      

        alertDialog.setButton("OK", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {

            }

        });

        

        alertDialog.show();

    }

}

ConnectionDetector.Java

package com.example.raji;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

public class ConnectionDetector {

private Context _context;

public ConnectionDetector(Context context){

this._context = context;

}

public boolean isConnectingToInternet(){

ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);

 if (connectivity != null) 

 {

 NetworkInfo[] info = connectivity.getAllNetworkInfo();

 if (info != null) 

 for (int i = 0; i < info.length; i++) 

 if (info[i].getState() == NetworkInfo.State.CONNECTED)

 {

 return true;

 }

 }

 return false;

}

}

AndroidManifestfile.XML

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

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

    package="com.example.raji"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="21" />

    <!-- Internet Permissions -->

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

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

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".MainActivity"

            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>

</manifest>

Output

This Program developed by my Student Rajeswari.