每次断开WiFi通知

问题描述

每当WiFi离线时，我都需要我的应用程序发出通知.

I need my application to give a notification whenever WiFi goes offline.

每次WiFi连接更改时，我都会发出通知.但是我需要它仅在离线时发出通知.

I got it to give a notification every time the WiFi connection changes. But I need it to only give a notification when it goes offline.

它还会在启动(应用程序)时发出通知.

Also it gives a notification on start-up (of the application).

我的问题是，如何更改代码以仅在WiFi脱机时发出通知?现在，它会在离线，在线和启动时发出通知.

My question is, how do I alter the code to only give a notification when WiFi goes offline? Now it gives a notification when it goes offline, online and on start-up.

代码:

 public class MainActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);
 this.registerReceiver(this.mConnReceiver,
    new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
 setContentView(R.layout.activity_main);
 }

 private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {
 public void onReceive(Context context, Intent intent) {
 boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
 String reason = intent.getStringExtra(ConnectivityManager.EXTRA_REASON);
 boolean isFailover = intent.getBooleanExtra(ConnectivityManager.EXTRA_IS_FAILOVER, false);

 NetworkInfo currentNetworkInfo = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
 NetworkInfo otherNetworkInfo = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO);

 if(currentNetworkInfo.isConnected()){
 }
 else{showNotification();}

 }
 };

推荐答案

在 BroadCastReceiver

if(!isNetworkConnectionAvailable(ctx)){
        Toast.makeText(ctx, "Network Connection Available ", Toast.LENGTH_LONG).show();
    }

isNetworkConnectionAvailable()的代码是

the code for isNetworkConnectionAvailable() is

    public static boolean isNetworkConnectionAvailable(Context context)
{
    boolean isNetworkConnectionAvailable = false;

    ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService("connectivity");
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();

    if(activeNetworkInfo != null)
    {
        isNetworkConnectionAvailable = activeNetworkInfo.getState() == NetworkInfo.State.CONNECTED;
    }
    return isNetworkConnectionAvailable;
}

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