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W1ll
Asked: 2020-03-22 16:28:56 +0800 CST 2020-03-22 16:28:56 +0800 CST

BroadcastReceiver to monitor if the WIFI is connected or disconnected

  • 772

I am using this BroadcastReceiver to monitor if the WIFI is connected or disconnected , but it is not working for me, it detects that the WIFI is connected but not when it is disconnected, can someone tell me what is the error?

public class MainActivity extends Activity {

private BroadcastReceiver WifiReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        int WifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,
                WifiManager.WIFI_STATE_UNKNOWN);

        switch (WifiState) {
            case WifiManager.WIFI_STATE_ENABLED: {
                Toast.makeText(context,"Wifi enabled",Toast.LENGTH_LONG).show();
            }
            break;

            case WifiManager.WIFI_STATE_ENABLING: {
                Toast.makeText(context,"Wifi enabling",Toast.LENGTH_LONG).show();
            }
            break;
            case WifiManager.WIFI_STATE_DISABLED: {
                Toast.makeText(context,"Wifi disabled",Toast.LENGTH_LONG).show();
            }
            break;

            case WifiManager.WIFI_STATE_DISABLING: {
            }
            break;

            case WifiManager.WIFI_STATE_UNKNOWN: {
            }
            break;
        }
    } };

protected void onResume(){
    super.onResume();
    registerReceiver(WifiReceiver, new IntentFilter( WifiManager.WIFI_STATE_CHANGED_ACTION));
}

protected void onPause(){
    super.onPause();
    unregisterReceiver(WifiReceiver);
}

}

android

1 Answers

  1. Best Answer

    You can get when there is no connection by:

    ConnectivityManager.EXTRA_NO_CONNECTIVITY : Indicates if there is a complete lack of connectivity, i.e. no network available.

    if(intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, Boolean.FALSE)) {
      Log.i("Network", "No existe conectividad!");
}

    According to the above this is an example class:

    public class WifiReceiver extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {  
     if(intent.getExtras() != null) {
        NetworkInfo ni = (NetworkInfo) intent.getExtras().get(ConnectivityManager.EXTRA_NETWORK_INFO);
        if(ni != null && ni.getState() == NetworkInfo.State.CONNECTED) {
             Toast.makeText(context,"Wifi enabled " + ni.getTypeName(),Toast.LENGTH_LONG).show();

        } else if(intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, Boolean.FALSE)) {
             Toast.makeText(context,"Wifi disabled",Toast.LENGTH_LONG).show();
        }
   }
}

    Don't forget to register your BroadcastReceiver:

    <receiver android:name=". WifiReceiver">
   <intent-filter>
      <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
   </intent-filter>
</receiver>
    • 2