LocationManager

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<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> ： NETWORK 和 GPS 权限
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

(LocationManager) Android002.this.getSystemService(Context.LOCATION_SERVICE);

getAllProviders()

getBestProvider(criteria, false)

Criteria criteria = new Criteria();

criteria.setAccuracy(Criteria.ACCURACY_FINE);//设置查询精度的高低
criteria.setPowerRequirement(Criteria.POWER_LOW);//设置消耗级别高低
criteria.setAltitudeRequired(false);//海拔
criteria.setSpeedRequired(false);//速度
criteria.setCostAllowed(false);//会不会产生费用

根据Criteria这个类设置的要求，选出最好的provider

<uses-permission android:name="android.permission.INTERNET"/> 访问网络的权限

//访问指定的网页

String path = "http://192.168.0.99:8080/my/index.jsp";//post
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", "admin"));
HttpPost request = new HttpPost(path);
request.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
HttpResponse response = new DefaultHttpClient().execute(request);
boolean flag= false;
if(response.getStatusLine().getStatusCode() != 404){
flag = Boolean.parseBoolean(EntityUtils.toString(response.getEntity()).trim());

}

wifi权限：

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

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

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

跟LocationManager差不多：

wifiManager = (WifiManager)MainActivity.this.getSystemService(Context.WIFI_SERVICE);

getWifiState()：当前wifi的状态

setWifiEnabled()：设置wifi的状态，true为打开，false为关闭

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