我需要检测何时可以连接到特定的 WIFI 网络。
例如：当您走进您的房子，并且您的手机连接到您的家庭 WiFi 网络时，我想要一个通知，上面写着“您不在您的家庭网络中，您想连接到您家吗？ "但我希望这种情况只发生在我特定的房子里。
我应该听什么以及应该做哪些测试来确保它是我的特定家庭网络，而不是另一个网络？
【问题讨论】：
你可以使用BroadcastReceiver来发现wifi网络发生了变化：
BroadcastReceiver broadcastReceiver = new WifiBroadcastReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
context.registerReceiver(broadcastReceiver, intentFilter);
BroadcastReceiver 可能如下所示。 要检查特定的 MAC 地址，请参见下面的 checkConnectedToDesiredWifi() 方法。
public class WifiBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (WifiManager.SUPPLICANT_STATE_CHANGED_ACTION .equals(action)) {
SupplicantState state = intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE);
if (SupplicantState.isValidState(state)
&& state == SupplicantState.COMPLETED) {
boolean connected = checkConnectedToDesiredWifi();
}
}
}
/** Detect you are connected to a specific network. */
private boolean checkConnectedToDesiredWifi() {
boolean connected = false;
String desiredMacAddress = "router mac address";
WifiManager wifiManager =
(WifiManager) context.getSystemService(Context.WIFI_SERVICE);
WifiInfo wifi = wifiManager.getConnectionInfo();
if (wifi != null) {
// get current router Mac address
String bssid = wifi.getBSSID();
connected = desiredMacAddress.equals(bssid);
}
return connected;
}
}
【讨论】：
只要我们不像您需要的代码，免费服务，我只能建议您在创建此类应用程序时阅读有关 Android 及其网络/Wifi 可能性的所有可能信息.
http://developer.android.com/reference/android/net/wifi/package-summary.html
how to see if wifi is connected in android
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How to get name of wifi-network out of android using android API?
Get Wifi Interface name on Android
AndroidManifest.xml
<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_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
（最后一个，仅当您希望它检测您的位置时，以防止不必要的呼叫）
AndroidManifest.xml
<uses-feature android:name="android.hardware.wifi" />
【讨论】：
使用标准代码列出所有可用网络：
开始扫描
String connectivity_context = Context.WIFI_SERVICE;
final WifiManager wifi = (WifiManager) getSystemService(connectivity_context);
if (wifi.isWifiEnabled()) {
wifi.startScan();
}
为数据注册一个接收器
IntentFilter i = new IntentFilter();
i.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent i) {
// TODO Auto-generated method stub
ScanWiFiActivity a = ScanWiFiActivity.instance();
WifiManager w = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
List<ScanResult> l = w.getScanResults();
a.Clear();
for (ScanResult r : l) {
//use r.SSID or r.BSSID to identify your home network and take action
a.setText(r.SSID + "" + r.level + "\r\n");
}
}
};
registerReceiver(receiver, i);
当您通过 SSID 或 BSSID 识别您的网络时，在 FOR 块中发挥您的魔力并采取行动
【讨论】：
我的一个项目遇到了完全相同的问题，花了一段时间才找到解决方案。
首先，“连接到 WiFi”是非常抽象的东西，事实证明是正确的。在实践中，人们通常指的是以下所有内容：
所有这些阶段（以及更多阶段）都与不同的 Andoid 事件相关联。所以，事不宜迟，这是我的（稍作修改）代码：
public class MyService extends Activity { // or Service
//... Other stuff
BroadcastReceiver awaitIPAddress = null;
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION)) {
if (intent.getParcelableExtra(WifiManager.EXTRA_NEW_STATE) == SupplicantState.COMPLETED) {
//WiFi is associated
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wi = wifiManager.getConnectionInfo();
if (wi != null) {
// Wifi info available (should be, we are associated)
if (wi.getIpAddress() != 0) {
// Lucky us, we already have an ip address.
// This happens when a connection is complete, e.g. after rekeying
if (wi.getBSSID().equals("c0:ff:ee:c0:ff:ee")) {
// ... Do your stuff here
// ...
// ...
}
} else {
// No ip address yet, we need to wait...
// Battery friendly method, using events
if (awaitIPAddress == null) {
awaitIPAddress = new BroadcastReceiver() {
@Override
public void onReceive(Context ctx, Intent in) {
WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wi = wifiManager.getConnectionInfo();
if (wi != null) {
if (wi.getIpAddress() != 0) {
if (wi.getBSSID().equals("c0:ff:ee:c0:ff:ee")) {
// ... Do your stuff here
// ...
// ...
}
}
} else {
ctx.unregisterReceiver(this);
awaitIPAddress = null;
}
}
};
// We register a new receiver for connectivity events
// (getting a new IP address for example)
context.registerReceiver(awaitIPAddress, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
}
}
}
} else {
// wifi connection not complete, release ip address receiver if registered
if (awaitIPAddress != null) {
context.unregisterReceiver(awaitIPAddress);
awaitIPAddress = null;
}
}
}
}
};
//... Other stuff
@Override
public void onCreate() {
super.onCreate();
//... Other stuff
IntentFilter filter = new IntentFilter();
filter.addAction(WifiManager.SUPPLICANT_STATE_CHANGED_ACTION);
registerReceiver(receiver, filter);
//... Other stuff
}
//... Other stuff
}
另外，不要忽略清单的适当权限：
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
我强烈怀疑您还需要：
<uses-permission android:name="android.permission.INTERNET"/>
【讨论】：