Android连接指定Wifi的方法实例代码

 .................... //Open按键点击后的逻辑 mOpenWifiButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //WifiManager的isWifiEnabled接口，用于判断Wifi开关是否已经开启 if (!mWifiManager.isWifiEnabled()) { //setWifiEnabled接口用于开启Wifi mWifiManager.setWifiEnabled(true); mMainHandler.post(mMainRunnable); } } }); ....................

 ................ private Runnable mMainRunnable = new Runnable() { @Override public void run() { if (mWifiManager.isWifiEnabled()) { //开启成功后，使能Get按键 mGetWifiInfoButton.setEnabled(true); } else { mMainHandler.postDelayed(mMainRunnable, 1000); } } }; ..............

 ................. mGetWifiInfoButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mWifiManager.isWifiEnabled()) { //getScanResults接口将返回List //ScanResult中保留了每个接入点的基本信息 mScanResultList = mWifiManager.getScanResults(); //多个接入点可能携带相同的信息，形成一个整体的Wifi覆盖网络 //因此，筛除一些冗余信息 sortList(mScanResultList); //我使用的是RecyclerView，得到数据后，刷新界面进行显示 mWifiInfoRecyclerView.getAdapter().notifyDataSetChanged(); } } }); .................

 .............. private void sortList(List list) { TreeMap map = new TreeMap<>(); //demo中仅按照SSID进行筛选 //实际使用时，还可以参考信号强度等条件 for (ScanResult scanResult : list) { map.put(scanResult.SSID, scanResult); } list.clear(); list.addAll(map.values()); } .............

 public List getScanResults(String callingPackage) { //这里要求的是ACCESS_WIFI_STATE enforceAccessPermission(); ............ try { ........... if (!canReadPeerMacAddresses && !isActiveNetworkScorer //在checkCallerCanAccessScanResults中检查了ACCESS_FINE_LOCATION和ACCESS_COARSE_LOCATION //如果没有这两个权限，就会返回一个empty List && !checkCallerCanAccessScanResults(callingPackage, uid)) { return new ArrayList(); } ........... } fianlly { .......... } }

 ............... private class ScanResultViewHolder extends RecyclerView.ViewHolder { private View mView; private TextView mWifiName; private TextView mWifiLevel; ScanResultViewHolder(View itemView) { super(itemView); mView = itemView; mWifiName = (TextView) itemView.findViewById(R.id.ssid); mWifiLevel = (TextView) itemView.findViewById(R.id.level); } void bindScanResult(final ScanResult scanResult) { //将接入点的名称和强度显示到界面上 mWifiName.setText( getString(R.string.scan_wifi_name, "" + scanResult.SSID)); mWifiLevel.setText( getString(R.string.scan_wifi_level, "" + scanResult.level)); //点击Item后，就连接对应的接入点 mView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //createWifiConfig主要用于构建一个WifiConfiguration，代码中的例子主要用于连接不需要密码的Wifi //WifiManager的addNetwork接口，传入WifiConfiguration后，得到对应的NetworkId int netId = mWifiManager.addNetwork(createWifiConfig(scanResult.SSID, "", WIFICIPHER_NOPASS)); //WifiManager的enableNetwork接口，就可以连接到netId对应的wifi了 //其中boolean参数，主要用于指定是否需要断开其它Wifi网络 boolean enable = mWifiManager.enableNetwork(netId, true); Log.d("ZJTest", "enable: " + enable); //可选操作，让Wifi重新连接最近使用过的接入点 //如果上文的enableNetwork成功，那么reconnect同样连接netId对应的网络 //若失败，则连接之前成功过的网络 boolean reconnect = mWifiManager.reconnect(); Log.d("ZJTest", "reconnect: " + reconnect); } }); } } .................

 .................... private static final int WIFICIPHER_NOPASS = 0; private static final int WIFICIPHER_WEP = 1; private static final int WIFICIPHER_WPA = 2; private WifiConfiguration createWifiConfig(String ssid, String password, int type) { //初始化WifiConfiguration WifiConfiguration config = new WifiConfiguration(); config.allowedAuthAlgorithms.clear(); config.allowedGroupCiphers.clear(); config.allowedKeyManagement.clear(); config.allowedPairwiseCiphers.clear(); config.allowedProtocols.clear(); //指定对应的SSID config.SSID = "\"" + ssid + "\""; //如果之前有类似的配置 WifiConfiguration tempConfig = isExist(ssid); if(tempConfig != null) { //则清除旧有配置 mWifiManager.removeNetwork(tempConfig.networkId); } //不需要密码的场景 if(type == WIFICIPHER_NOPASS) { config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); //以WEP加密的场景 } else if(type == WIFICIPHER_WEP) { config.hiddenSSID = true; config.wepKeys[0]= "\""+password+"\""; config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN); config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED); config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); config.wepTxKeyIndex = 0; //以WPA加密的场景，自己测试时，发现热点以WPA2建立时，同样可以用这种配置连接 } else if(type == WIFICIPHER_WPA) { config.preSharedKey = "\""+password+"\""; 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; } return config; } ................. private WifiConfiguration isExist(String ssid) { List configs = mWifiManager.getConfiguredNetworks(); for (WifiConfiguration config : configs) { if (config.SSID.equals("\""+ssid+"\"")) { return config; } } return null; } .................

 ................... private BroadcastReceiver mBroadcastReceiver; private void registerBroadcastReceiver() { mBroadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { //收到广播后，利用"wifi_state"的字段，得到AP的状态 int state = intent.getIntExtra("wifi_state", 11); Log.d("ZJTest", "AP state: " + state); } }; IntentFilter intentFilter = new IntentFilter(); //添加Action对应的字符信息 intentFilter.addAction("android.net.wifi.WIFI_AP_STATE_CHANGED"); this.registerReceiver(mBroadcastReceiver, intentFilter); } ......... private void unregisterBroadcastReceiver() { this.unregisterReceiver(mBroadcastReceiver); } ..........

 //对应WIFI_AP_STATE_ENABLED，定义于WifiManager中，@SystemApi 02-20 17:48:52.470 12773-12773/? D/ZJTest: AP state: 13

 //WIFI_AP_STATE_DISABLING 02-20 17:49:35.803 12773-12773/stark.a.is.zhang.wifitest D/ZJTest: AP state: 10 //WIFI_AP_STATE_DISABLED 02-20 17:49:36.960 12773-12773/stark.a.is.zhang.wifitest D/ZJTest: AP state: 11

 public boolean setWifiApConfiguration(WifiConfiguration wifiConfig) public WifiConfiguration getWifiApConfiguration()

 public boolean setWifiApEnabled(WifiConfiguration wifiConfig, boolean enabled)