1、首先新建了布局模板XML文件vifi.xml,代码很简单，如下：

<?xml version="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 {

TextView mainText;

WifiManager mainWifi;

WifiReceiver receiverWifi;

List<ScanResult> wifiList;

StringBuilder sb = new StringBuilder();

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.vifi);

setTitle("eoe教程: Wifi Test. -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("\nStarting Scan...\n");

}

public boolean onCreateOptionsMenu(Menu menu) {

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

return super.onCreateOptionsMenu(menu);

}

public boolean onMenuItemSelected(int featureId, MenuItem item) {

mainWifi.startScan();

mainText.setText("Starting Scan");

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(Context c, Intent intent) {

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>

4、OK，就这些，允允许下，效果看附件图片，我扫描到我这有2个热点。