Android中扫描wifi热点

1、首先新建了布局模板XML文件vifi.xml,代码很简单，如下： <? xmlversion="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:id ="@+id/wifi"

android:layout_width ="fill_parent"

android:layout_height ="wrap_content"

android:text ="@string/hello" />

</ LinearLayout >

2 、写java代码，新建个Activity，代码如下： package com.eoeandroid.demo.testcode;

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.view.MenuItem;

import android.widget.TextView;

public class WifiTester extends Activity{

TextViewmainText;

WifiManagermainWifi;

WifiReceiverreceiverWifi;

List < ScanResult > wifiList;

StringBuildersb = new StringBuilder();

public void onCreate(BundlesavedInstanceState){

super .onCreate(savedInstanceState);

setContentView(R.layout.vifi);

setTitle( " eoe教程:WifiTest.-by:IceskYsl " );

mainText = (TextView)findViewById(R.id.wifi);

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

receiverWifi = new WifiReceiver();

registerReceiver(receiverWifi, new IntentFilter(

WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

mainWifi.startScan();

mainText.setText( " \nStartingScan...\n " );

}

public boolean onCreateOptionsMenu(Menumenu){

menu.add( 0 , 0 , 0 , " Refresh " );

return super .onCreateOptionsMenu(menu);

}

public boolean onMenuItemSelected( int featureId,MenuItemitem){

mainWifi.startScan();

mainText.setText( " StartingScan " );

return super .onMenuItemSelected(featureId,item);

}

protected void onPause(){

unregisterReceiver(receiverWifi);

super .onPause();

}

protected void onResume(){

registerReceiver(receiverWifi, new IntentFilter(

WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

super .onResume();

}

class WifiReceiver extends BroadcastReceiver{

public void onReceive(Contextc,Intentintent){

sb = new StringBuilder();

wifiList = mainWifi.getScanResults();

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

sb.append( new Integer(i + 1 ).toString() + " . " );

sb.append((wifiList.get(i)).toString());

sb.append( " \n\n " );

}

mainText.setText(sb);

}

}

}

3、申请相关权限，代码如下： < uses-permission android:name ="android.permission.ACCESS_WIFI_STATE" ></ uses-permission >

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

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

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

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

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

转载：http://www.eoeandroid.com/viewthread.php?tid=386

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