每次通知wifi已斷開連接

Question

我需要我的應用程序在WiFi下線時發出通知。

每當WiFi連接發生變化時，我都會通知您。但我需要它只在脫機時發出通知。

此外，它還提供了啓動（應用程序）的通知。

我的問題是，如何更改代碼以僅在WiFi下線時發出通知？現在它在脫機，聯機和啓動時發出通知。

代碼：提前

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();} 

} 
}; 

謝謝！

Answer 1

使用這一行onReceive()的BroadCastReceiver

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

爲isNetworkConnectionAvailable（代碼）方法返回true是

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; 
} 

對評論我有關結果

Answer 2

使用該鏈路的連通InetAddress.isReachable，如果你有連接其他虛假