WifiManager
获得WifiManager的实例
1private WifiManager mWifiManager = (WifiManager)c.getSystemService(Context.WIFI_SERVICE);检测Wiif的状态
Wifi的状态值常量
12345WIFI_STATE_DISABLED = 1; //Wi-Fi is disabled.WIFI_STATE_DISABLING = 0; //Wi-Fi is currently being disabledWIFI_STATE_ENABLED = 3; //Wi-Fi is enabled.WIFI_STATE_ENABLING = 2; //Wi-Fi is currently being enabled.WIFI_STATE_UNKNOWN = 4; //Wi-Fi is in an unknown state
Wifi状态监测
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state的值,对应上面的wifi状态常量
连接wifi
打开wifi
1mWifiManager.setWifiEnabled(true);关闭wifi
1mWifiManager.setWifiEnabled(false);Wifi 状态的变化的监听
Wifi状态的变化可以通过广播来监听
123456789101112private BroadcastReceiver mReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {String action = intent.getAction();if(action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION)){int s = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN);//wifi的状态变化会触发这个广播//s的值对应上面的wifi状态常量,可以根据不同的状态值来更新界面}}};链接wifi
123//netId 可以通过添加一个WifiConfiguration获得int netId = mWifiManager.addNetwork(config);boolean b = mWifiManager.enableNetwork(netId, true);添加WifiConfiguration
//ssid : wifi 的名称,pwd: wifi的密码 ,type: 加密方式 0:没有加密 1:wep 2: wap123456789101112131415161718192021222324public WifiConfiguration createWifiInfo(String ssid,String pwd,int type){log.e("create wifif ssid: "+ssid+" pwd: "+pwd+" type "+type);WifiConfiguration cfg = new WifiConfiguration();WifiConfiguration tempConfig = this.isExist(ssid);if(tempConfig != null) {mWifiManger.removeNetwork(tempConfig.networkId);}cfg.SSID = "\"" + ssid + "\"";if( !TextUtils.isEmpty(pwd)) {if(type == 0){cfg.wepKeys[0] = "";cfg.allowedKeyManagement.set(0);cfg.wepTxKeyIndex = 0;}else if( type == 1 ) {cfg.wepKeys[0] = "\"" + pwd + "\"";cfg.wepTxKeyIndex = 0;}else {cfg.preSharedKey = "\"" + pwd + "\"";}}return cfg;}wifi断开连接
1mWifiManager.disableNetwork(netId);删除已经保存的wifi
1boolean r = mWifiManager.removeNetwork(netId);扫描可用的Wifi
Wifi连接之后,可以扫描当前可以使用的wifi
1boolean scan = mWifiManager.startScan(); //返回true,说明扫描成功获取扫描到的wifi列表
1List<ScanResult> scanResults = mWifiManager.getScanResults();通过ScanResult可以获得wifi的相关信息
1234567for(ScanResult sr : scanResults){String SSID = sr.SSID; //wifi的名称,在设置中显示的名称String BSSID = sr.BSSID; //wifi的地址String cap = sr.capabilities; //wifi的加密方式int freq = sr.frequency ; //wifi的频率int level = sr.level; //wifi的强度}计算wifi的强度
1int level = WifiManager.calculateSignalLevel(sr.level, 5);获取已经连接的wifi的信息
1WifiInfo wi = mWifiManger.getConnectionInfo();
WifiInfo 的信息如图
获取已经配置好的wifi的信息
1List<WifiConfiguration> configs = mWifiManager.getConfiguredNetworks();
WifiConfiguration的信息如图