Android 多次触发广播连接更改

在BroadcastReceiver中，我使用此代码检测设备何时连接到互联网，何时连接可用-WiFi/数据：

if(arg1.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {

        ConnectivityManager connMgr = (ConnectivityManager) arg0.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();

        if(networkInfo != null && networkInfo.isConnected() && networkInfo.isAvailable()) {

 Toast.makeText(Context, "Connected to internet", Toast.LENGTH_LONG).show();

 }

问题是：

电话断开了

我启用WiFi或数据连接

我收到通知，但次数太多了。电话仍然连接，但我一直收到通知

为什么?

谢谢你可以试试这个：

public class MainActivity extends Activity {

    private class ConnectivityBroadcastReceiver extends BroadcastReceiver {

        @Override
        public void onReceive( final Context context, final Intent intent ) {

            MainActivity.this.oldWifiConnectionState = MainActivity.this.currentWifiConnectionState;

            boolean wifiConnected = false;

            final ConnectivityManager connMgr = ( ConnectivityManager ) context.getSystemService( Context.CONNECTIVITY_SERVICE );

            final NetworkInfo networkInfo = connMgr.getActiveNetworkInfo();

            if ( ( networkInfo != null ) && networkInfo.isConnected() && networkInfo.isAvailable() ) {
                wifiConnected = true;
            }

           // or you can use 
           // wifiConnected  = ( activeNetwork != null ) && activeNetwork.isConnectedOrConnecting();


            boolean mobileDataEnabled = false; // Assume disabled

            try {
                final Class cmClass = Class.forName( connMgr.getClass().getName() );
                final Method method = cmClass.getDeclaredMethod( "getMobileDataEnabled" );
                method.setAccessible( true ); // Make the method callable

                // get the setting for "mobile data"
                mobileDataEnabled = ( Boolean ) method.invoke( connMgr );

            } catch ( final Exception e ) {
                mobileDataEnabled = false;
            }

            MainActivity.this.currentWifiConnectionState = ( wifiConnected || mobileDataEnabled ) ? WifiConnectionState.CONNECTED : WifiConnectionState.NOT_CONNECTED;

            if ( !MainActivity.this.currentWifiConnectionState.equals( MainActivity.this.oldWifiConnectionState ) ) {
                // Notifiy any handlers.

            }

        }

    }

    private enum WifiConnectionState {
        CONNECTED, NOT_CONNECTED, UNKNOWN
    }

    private WifiConnectionState           currentWifiConnectionState;

    private ConnectivityBroadcastReceiver mReceiver = null;

    private WifiConnectionState           oldWifiConnectionState;

    @Override
    protected void onCreate( final Bundle savedInstanceState ) {

        this.currentWifiConnectionState = WifiConnectionState.UNKNOWN;

        this.mReceiver = new ConnectivityBroadcastReceiver();

        super.onCreate( savedInstanceState );

    }

    @Override
    protected void onPause() {

        this.unregisterReceiver( this.mReceiver );
        super.onPause();
    }

    @Override
    protected void onResume() {
        this.registerReceiver( this.mReceiver, new IntentFilter( "android.net.conn.CONNECTIVITY_CHANGE" ) );
        super.onResume();
    }
}

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谢谢你的回答，但这和我的代码差不多，试着打开你的活动，启用Wifi&你会看到它被多次触发，比如说，这是安卓本身的一个Bug？设备连接后会多次发送广播，我尝试了所有可用的方法等。您的广播有时会收到此通知。您可以使用enum WifiConnectionState来控制此通知。抱歉，但是什么是enum WifiConnectionState？在我的代码中，我创建了一个名为WifiConnectionState的enum来控制wifi状态已连接、未连接，并在该状态发生更改时通知所有处理程序。