概述
工作需要用到扫描附近wifi并连接到指定wifi功能，在这里做一个记录。在Android 7.0 和 8.1 都测试过都可用。代码来源网络。扫描并连接指定wifi包括以下4个步骤：
授权
扫描附近的wifi
注册广播监听wifi状态变化
连接指定的wifi
授权
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
//要定位权限才能搜索wifi
PermissionUtil.requestEach(this, new PermissionUtil.OnPermissionListener() { @Override
public void onSucceed() { //授权成功后打开wifi
scanWifiInfo();
} @Override
public void onFailed(boolean showAgain) {
}
}, PermissionUtil.LOCATION);扫描附近的wifi
/**
* 扫描附近wifi
*/
private void scanWifiInfo() {
String wserviceName = Context.WIFI_SERVICE;
WifiManager mWifiManager = (WifiManager) getSystemService(wserviceName);
mWifiManager.setWifiEnabled(true);
mWifiManager.startScan();
mWifiList.clear();
mWifiList = mWifiManager.getScanResults(); if(mWifiList != null && mWifiList.size() > 0) {
adapter = new ListAdapter(this, mWifiList);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) { //连接wifi
ScanResult scanResult = mWifiList.get(position);
connectWifi(scanResult.SSID, "ILOVEYOU", "WPA");
}
});
}
}注册广播监听wifi状态变化
@Override
public void onResume() { super.onResume(); //注册广播
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wifiwifi连接状态广播
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);
} @Override
public void onPause() { super.onPause(); //取消监听
unregisterReceiver(wifiReceiver);
} //监听wifi状态广播接收器
public class WifiBroadcastReceiver extends BroadcastReceiver { @Override
public void onReceive(Context context, Intent intent) { if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) { int state = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0); switch (state) { /**
* WIFI_STATE_DISABLED WLAN已经关闭
* WIFI_STATE_DISABLING WLAN正在关闭
* WIFI_STATE_ENABLED WLAN已经打开
* WIFI_STATE_ENABLING WLAN正在打开
* WIFI_STATE_UNKNOWN 未知
*/
case WifiManager.WIFI_STATE_DISABLED: {
Log.i(TAG, "已经关闭"); break;
} case WifiManager.WIFI_STATE_DISABLING: {
Log.i(TAG, "正在关闭"); break;
} case WifiManager.WIFI_STATE_ENABLED: {
Log.i(TAG, "已经打开");// sortScaResult();
break;
} case WifiManager.WIFI_STATE_ENABLING: {
Log.i(TAG, "正在打开"); break;
} case WifiManager.WIFI_STATE_UNKNOWN: {
Log.i(TAG, "未知状态"); break;
}
}
} else if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {
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
Log.i(TAG, "wifi连接上了");
} else if (NetworkInfo.State.CONNECTING == info.getState()) {//正在连接
Log.i(TAG, "wifi正在连接");
}
} else if (WifiManager.SCAN_RESULTS_AVAILABLE_ACTION.equals(intent.getAction())) {
Log.i(TAG, "网络列表变化了");
}
}
}连接指定的wifi
/**
* 连接wifi
* @param targetSsid wifi的SSID
* @param targetPsd 密码
* @param enc 加密类型
*/
@SuppressLint("WifiManagerLeak") public void connectWifi(String targetSsid, String targetPsd, String enc) { // 1、注意热点和密码均包含引号，此处需要需要转义引号
String ssid = "\"" + targetSsid + "\"";
String psd = "\"" + targetPsd + "\""; //2、配置wifi信息
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = ssid; switch (enc) { case "WEP": // 加密类型为WEP
conf.wepKeys[0] = psd;
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); break; case "WPA": // 加密类型为WPA
conf.preSharedKey = psd; break; case "OPEN": //开放网络
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
} //3、链接wifi
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiManager.addNetwork(conf);
List<WifiConfiguration> list = wifiManager.getConfiguredNetworks(); for (WifiConfiguration i : list) { if (i.SSID != null && i.SSID.equals(ssid)) {
wifiManager.disconnect();
wifiManager.enableNetwork(i.networkId, true);
wifiManager.reconnect(); break;
}
}
}
作者：JairusTse
链接：https://www.jianshu.com/p/5e611a7204e1
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