Android Programming Tutorials 28 : WiFi In Android

OutPut Of the Tutorial:

Create Android Application:

• File >> New >> Android Application
• Enter Project name: WiFiApp
• Package: com.ambilpursunil.newapp
• Keep other default selections, click Next until you reach Finish

                               

 1.Simply Copy and Past the Code which is display below in the  MainActivity.java 

package com.ambilpursunil.newapp;

import java.util.List;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.net.wifi.ScanResult;

import android.net.wifi.WifiManager;

import android.os.Bundle;

import android.view.Menu;

import android.widget.ArrayAdapter;

import android.widget.ListView;

public class MainActivity<T> extends Activity {

           

            WifiManager mainWifiObj;

            WifiScanReceiver wifiReciever;

            ListView list;

            String wifis[];

           

            @Override

            protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

            list = (ListView) findViewById(R.id.listView1);

mainWifiObj = (WifiManager) getSystemService(Context.WIFI_SERVICE);

            wifiReciever = new WifiScanReceiver();

            mainWifiObj.startScan();

            }

            @Override

            protected void onPause() {

           // TODO Auto-generated method stub

           unregisterReceiver(wifiReciever);

           super.onPause();

           }

           @Override

           protected void onResume() {

           // TODO Auto-generated method stub

registerReceiver(wifiReciever, new                                                                                       IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

           super.onResume();

           }

           class WifiScanReceiver extends BroadcastReceiver{

           @Override

           public void onReceive(Context context, Intent intent) {

           //List<E>O Auto-generated method stub

           List<ScanResult> wifiScanList = mainWifiObj.getScanResults();

           wifis = new String[wifiScanList.size()];

           for(int i=0; i<wifiScanList.size(); i++){

           wifis[i] =((wifiScanList.get(i).toString()));

           }

 list.setAdapter(new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, wifis));

           }

          }

   }

 2.Simple Copy and Past the below code:  actvitiy_main.xml

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="@drawable/backwifi"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

   

    <ListView

        android:id="@+id/listView1"

      android:layout_width="match_parent"

      android:layout_height="wrap_content"

      android:layout_alignParentTop="true"

      android:layout_centerHorizontal="true"

      android:drawSelectorOnTop="false"

      android:background="@android:color/background_dark"

      android:listSelector="@android:color/darker_gray" >

      </ListView>

    

</RelativeLayout>

3.Copy and past the code for res=>value=>string.xml

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

<resources>

    <string name="app_name">WifiApp</string>

    <string name="action_settings">Settings</string>

    <string name="title_activity_list_wifi">List</string>

</resources>

 4.Copy and past the code for manifest.xml

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

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

    package="com.ambilpursunil.newapp"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

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

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

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.ambilpursunil.newapp.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>

5.Right click on the project and Run As-->Android Application

OutPut Of the Tutorial:

OutPut:

When our application launch if any is WiFi ON then it will appear in the form of list. 
NOTE: In The Above Output video there is no wifi avaliable that is why screen is empty,
if any wifi service is avaliable the it will display in the list

Stay Tune For Next Tutorial...  ToggleButton In Android:

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