我正在开发一个 Android 应用程序。为了使该应用程序正常工作,需要始终启用 Wi-Fi。由于 Wi-Fi 已启用,它将继续扫描可用网络。
我希望 Wi-Fi 连接到特定网络后立即调用某些函数。 我如何实现这一目标?
我编写了以下代码,但这只有效一次,如何连续扫描网络?
ConnectivityManager connec = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifi = connec.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if(wifi.isConnected()){
final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
if (connectionInfo != null && !(connectionInfo.getSSID().equals(""))) {
String ssid = connectionInfo.getSSID();
}
Log.i("wifi", "connected");
}
else{
Log.i("wifi", "not connected");
}
最佳答案
按照步骤做一个技巧
1)创建NetworkChangeReceiver
public class NetworkChangeReceiver extends BroadcastReceiver {
public static boolean isWifiConnected = true;
public static final String tag = "NETWORKCHANGERECEIVER";
@Override
public void onReceive(final Context context, final Intent intent) {
ConnectivityManager connec = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo wifi = connec.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (wifi.isConnected()) {
final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
if (connectionInfo != null && !(connectionInfo.getSSID().equals(""))) {
String ssid = connectionInfo.getSSID();
}
isWifiConnected = true;
Log.i("wifi", "connected");
} else {
Log.i("wifi", "not connected");
isWifiConnected = false;
}
}
}
2) 将此行添加到 Manifest.xml
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<receiver android:name="com.df.src.NetworkChangeReceiver" >
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
关于java - 一旦 Android 应用程序检测到特定的 Wi-Fi 网络,就会触发一些代码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/23670295/