Android7.0+ 获取WiFi列表以及连接WiFi

获取WiFi列表并连接

这段时间项目中涉及到需要获取WiFi列表以及连接，在这里记录下
其中就有一个坑，在Android7.0以上还需要打开定位（也就是手机中”位置信息“）
WifiManager和LocationManager都需要获取下系统服务

mWifiManager = (WifiManager) getActivity().getSystemService(getActivity().WIFI_SERVICE);
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);

这里LocationManager是为了判断手机有没有打开这个“位置信息”
好的，前戏已经准备好了，接下来就是正轨了…

1. 监听WiFi的广播接收器是必不可少的

public class WifiBroadcastReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) {//wifi开关变化int state = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);switch (state) {case WifiManager.WIFI_STATE_DISABLED: {//wifi关闭Log.i(TAG, "已经关闭");break;}case WifiManager.WIFI_STATE_DISABLING: {//wifi正在关闭Log.i(TAG, "正在关闭");break;}case WifiManager.WIFI_STATE_ENABLED: {//wifi已经打开Log.i(TAG, "WIFI已打开");break;}case WifiManager.WIFI_STATE_ENABLING: {//wifi正在打开Log.i(TAG, "正在打开");break;}case WifiManager.WIFI_STATE_UNKNOWN: {//未知Log.i(TAG, "未知状态");break;}}} else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {//监听wifi连接状态NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
//                Log.i(TAG, "--NetworkInfo--" + info.toString());if (NetworkInfo.State.DISCONNECTED == info.getState()) {//wifi没连接上Log.i(TAG, "wifi没连接上");} else if (NetworkInfo.State.CONNECTED == info.getState()) {//wifi连接上了mScanResultList = MyWifiManager.getWifiList(mWifiManager);//获取Wifi列表for (int i = 0; i < mScanResultList.size(); i++) {mScanResultList.get(i).SSID//Wifi名称mScanResultList.get(i).level//wifi信号强度//其他就不列举了，根据自己的需求去取//在这增加一个获取当前已连接WiFi的名称以及信号强度WifiInfo wifiInfo = mWifiManager .getConnectionInfo();String name = wifiInfo.getSSID();//名称WifiInfo wifiInfo = manager.getConnectionInfo();int wiFiLevel = wifiInfo.getRssi();//信号强度}} else if (NetworkInfo.State.CONNECTING == info.getState()) {//正在连接Log.i(TAG, "wifi正在连接");tvConnectionCtatus.setText("正在连接");}} else if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(intent.getAction())) {//监听wifi列表变化Log.i(TAG, "wifi列表发生变化");}}}

广播到这就结束了，后面我会封装一个WifiManager工具类。咱继续哈
2. 注册广播（这里选择是动态注册）

 wifiReceiver = new WifiBroadcastReceiver();IntentFilter filter = new IntentFilter();filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);//监听wifi是开关变化的状态filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);//监听wifi连接状态filter.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);//监听wifi列表变化（开启一个热点或者关闭一个热点）registerReceiver(wifiReceiver, filter);

记得要unregistered(receiver)；
3. 最后把封装的WifiManager工具给大家贴出来

/*** 开始扫描wifi*/public static void startScanWifi(WifiManager manager) {if (manager != null) {manager.startScan();}}/*** 获取wifi列表*/public static List<ScanResult> getWifiList(WifiManager mWifiManager) {return mWifiManager.getScanResults();}/*** 保存网络*/public static void saveNetworkByConfig(WifiManager manager, WifiConfiguration config) {if (manager == null) {return;}try {Method save = manager.getClass().getDeclaredMethod("save", WifiConfiguration.class, Class.forName("android.wifi.WifiManager$ActionListener"));if (save != null) {save.setAccessible(true);save.invoke(manager, config, null);}} catch (Exception e) {e.printStackTrace();}}/*** 断开连接*/public static boolean disconnectNetwork(WifiManager manager) {return manager != null && manager.disconnect();}/*** 获取当前wifi名字** @return*/public static String getWiFiName(WifiManager manager) {WifiInfo wifiInfo = manager.getConnectionInfo();String name = wifiInfo.getSSID();return name.replace("\"", "");}/*** 获取当前WIFI信号强度** @param manager* @return*/public static int getWiFiLevel(WifiManager manager) {WifiInfo wifiInfo = manager.getConnectionInfo();return wifiInfo.getRssi();}/*** 获取wifi加密方式*/public static String getEncrypt(WifiManager mWifiManager, ScanResult scanResult) {if (mWifiManager != null) {String capabilities = scanResult.capabilities;if (!TextUtils.isEmpty(capabilities)) {if (capabilities.contains("WPA") || capabilities.contains("wpa")) {return "WPA";} else if (capabilities.contains("WEP") || capabilities.contains("wep")) {return "WEP";} else {return "没密码";}}}return "获取失败";}/*** 是否开启wifi，没有的话打开wifi*/public static void openWifi(WifiManager mWifiManager) {if (!mWifiManager.isWifiEnabled()) {mWifiManager.setWifiEnabled(true);}}/*** 是否开启wifi，没有的话打开wifi*/public static void closeWifi(WifiManager mWifiManager) {mWifiManager.setWifiEnabled(false);}/*** 有密码连接** @param ssid* @param pws*/public static void connectWifiPws(WifiManager mWifiManager, String ssid, String pws) {mWifiManager.disableNetwork(mWifiManager.getConnectionInfo().getNetworkId());int netId = mWifiManager.addNetwork(getWifiConfig(mWifiManager, ssid, pws, true));mWifiManager.enableNetwork(netId, true);}/*** wifi设置** @param ssid* @param pws* @param isHasPws*/private static WifiConfiguration getWifiConfig(WifiManager mWifiManager, String ssid, String pws, boolean isHasPws) {WifiConfiguration config = new WifiConfiguration();config.allowedAuthAlgorithms.clear();config.allowedGroupCiphers.clear();config.allowedKeyManagement.clear();config.allowedPairwiseCiphers.clear();config.allowedProtocols.clear();config.SSID = "\"" + ssid + "\"";WifiConfiguration tempConfig = isExist(ssid, mWifiManager);if (tempConfig != null) {mWifiManager.removeNetwork(tempConfigworkId);}if (isHasPws) {config.preSharedKey = "\"" + pws + "\"";config.hiddenSSID = true;config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);config.status = WifiConfiguration.Status.ENABLED;} else {config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);}return config;}/*** 得到配置好的网络连接** @param ssid* @return*/private static WifiConfiguration isExist(String ssid, WifiManager mWifiManager) {List<WifiConfiguration> configs = mWifiManager.getConfiguredNetworks();for (WifiConfiguration config : configs) {if (config.SSID.equals("\"" + ssid + "\"")) {return config;}}return null;}

当然最少不了的权限，6.0以后啊都是需要动态获取权限的，相信都会吧
下一篇博客就会写到动态获取权限，是一个封装好的工具类，使用起来非常方便，举个例子

第二个参数就是app需要进行检测的权限数组
PermissUtil.checkPermissions(this, PermissUtil.appNeedPermissions);

有不妥之处还请大家多多指教，谢谢！（持续关注哦）