Scanning WiFi hotspots in Android

1. First, the layout template XML file vifi. XML is created,CodeIt is very simple, as follows: <? XML version = "1.0" encoding = "UTF-8" ?>

<LinearlayoutXmlns: Android= "Http://schemas.android.com/apk/res/android"

Android: Orientation= "Vertical"Android: layout_width= "Fill_parent"

Android: layout_height= "Fill_parent">

<TextviewAndroid: ID= "@ + ID/WiFi" 

Android: layout_width= "Fill_parent"

Android: layout_height= "Wrap_content" 

Android: Text= "@ String/hello" />

</Linearlayout>

 

2 Write Java code and create an activity. The Code is as follows: Package Com. eoeandroid. Demo. testcode;

ImportJava. util. List;

ImportAndroid. App. activity;

ImportAndroid. content. broadcastreceiver;

ImportAndroid. content. context;

ImportAndroid. content. intent;

ImportAndroid. content. intentfilter;

ImportAndroid.net. Wifi. scanresult;

ImportAndroid.net. Wifi. wifimanager;

ImportAndroid. OS. Bundle;

ImportAndroid. View. Menu;

ImportAndroid. View. menuitem;

ImportAndroid. widget. textview;

Public ClassWifitesterExtendsActivity {

Textview maintext;

Wifimanager mainwifi;

Wifireceiver receiverwifi;

List<Scanresult>Wifilist;

Stringbuilder sb= NewStringbuilder ();

Public VoidOncreate (bundle savedinstancestate ){

Super. Oncreate (savedinstancestate );

Setcontentview (R. layout. vifi );

Settitle ("EOE Tutorial: WiFi test.-By: iceskysl");

Maintext=(Textview) findviewbyid (R. Id. WiFi );

Mainwifi=(Wifimanager) getsystemservice (context. wifi_service );

Receiverwifi= NewWifireceiver ();

Registerreceiver (receiverwifi,NewIntentfilter (

Wifimanager. scan_results_available_action ));

Mainwifi. startscan ();

Maintext. settext ("\ Nstarting scan... \ n");

}

Public BooleanOncreateoptionsmenu (menu ){

Menu. Add (0,0,0,"Refresh");

Return Super. Oncreateoptionsmenu (menu );

}

Public BooleanOnmenuitemselected (IntFeatureid, menuitem item ){

Mainwifi. startscan ();

Maintext. settext ("Starting Scan");

Return Super. Onmenuitemselected (featureid, item );

}

Protected VoidOnpause (){

Unregisterreceiver (receiverwifi );

Super. Onpause ();

}

Protected VoidOnresume (){

Registerreceiver (receiverwifi,NewIntentfilter (

Wifimanager. scan_results_available_action ));

Super. Onresume ();

}

ClassWifireceiverExtendsBroadcastreceiver {

Public VoidOnreceive (context c, intent ){

Sb= NewStringbuilder ();

Wifilist=Mainwifi. getscanresults ();

for ( int I = 0 ; I wifilist. size (); I ++ ) {

SB. append (NewINTEGER (I+ 1). Tostring ()+ ".");

SB. append (wifilist. Get (I). tostring ());

SB. append ("\ N");

}

Maintext. settext (SB );

}

}

}

 

3. Apply for related permissions using the following code: < Uses-Permission Android: Name = "Android. Permission. access_wifi_state" > </ Uses-Permission >

<Uses-PermissionAndroid: Name= "Android. Permission. access_checkin_properties"> </Uses-Permission> 

<Uses-PermissionAndroid: Name= "Android. Permission. wake_lock"> </Uses-Permission> 

<Uses-PermissionAndroid: Name= "Android. Permission. Internet"> </Uses-Permission> 

<Uses-PermissionAndroid: Name= "Android. Permission. change_wifi_state"> </Uses-Permission> 

<Uses-PermissionAndroid: Name= "Android. Permission. modify_phone_state"> </Uses-Permission>

 

Reprinted: http://www.eoeAndroid. Com/viewthread. php? Tid = 386