BroadcastReceiver的为CONNECTIVITY_ACTION总是intent.getExtras返回null（） [英] BroadcastReceiver for CONNECTIVITY_ACTION always returns null in intent.getExtras()

问题描述

我试着去接受来自CONNECTIVITY_ACTION BroadcastMessages：

Im trying to receive BroadcastMessages from CONNECTIVITY_ACTION:

    // register BroadcastReceiver on network state changes
    final IntentFilter mIFNetwork = new IntentFilter();
    mIFNetwork.addAction(android.net.ConnectivityManager.CONNECTIVITY_ACTION); //"android.net.conn.CONNECTIVITY_CHANGE"
    registerReceiver(mIRNetwork, mIFNetwork);

和接收器：

private BroadcastReceiver mIRNetwork = new BroadcastReceiver() {
    @Override
    public void onReceive(final Context context, final Intent intent) {

        android.util.Log.i(TAG,"mIRNetwork: Network State Received: "+intent.getAction());
        Bundle extras = intent.getExtras();
        if (extras!=null){
                android.util.Log.i(TAG,"mIRNetwork: ACTION_BACKGROUND_DATA_SETTING_CHANGED: "+extras.getString(ConnectivityManager.ACTION_BACKGROUND_DATA_SETTING_CHANGED));
                android.util.Log.i(TAG,"mIRNetwork: CONNECTIVITY_ACTION: "+extras.getString(ConnectivityManager.CONNECTIVITY_ACTION));
                android.util.Log.i(TAG,"mIRNetwork: EXTRA_EXTRA_INFO: "+extras.getString(ConnectivityManager.EXTRA_EXTRA_INFO));
                android.util.Log.i(TAG,"mIRNetwork: EXTRA_NO_CONNECTIVITY: "+extras.getString(ConnectivityManager.EXTRA_NO_CONNECTIVITY));
                android.util.Log.i(TAG,"mIRNetwork: EXTRA_REASON: "+extras.getString(ConnectivityManager.EXTRA_REASON));

            }
        }

总之演员总是空。我想，如果我失去WiFi连接，我应该得到EXTRA_NO_CONNECTIVITY（的Cuz其对互联网的唯一途径），或至少一些从列表中。但没有运气。如果我断开我的无线网络AP接收得到他的消息，但与空演员。当我把我的无线网络回再次接收器的火灾，但没有额外...这是为什么？如何知道应用程序失去了任何网络连接？我认为它的方式。

in short extras is always null. I thought that if i loose WiFi connection i should get EXTRA_NO_CONNECTIVITY (cuz its the only way to Internet) or at least something from the list. But no luck. If i disconnect my WiFi AP receiver gets his message but with null extras. When i turn my WiFi back on once again receiver fires but no extras... Why is that? How to know that app lost any network connection? I thought its the way.

推荐答案

您不能得到额外的，但你可以通过这种方式得到的数据。

You can not get extra but you can get data by this way

private class ConnectivityBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager
                .EXTRA_NO_CONNECTIVITY, false);
        NetworkInfo info1 = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager
                .EXTRA_NETWORK_INFO);
        NetworkInfo info2 = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager
                .EXTRA_OTHER_NETWORK_INFO);
        String reason = intent.getStringExtra(ConnectivityManager.EXTRA_REASON);
        boolean failOver = intent.getBooleanExtra(ConnectivityManager.EXTRA_IS_FAILOVER, false);
        Log.d("MY_TAG", "onReceive(): mNetworkInfo=" + info1 + " mOtherNetworkInfo = " +
                (info2 == null ? "[none]" : info2 + " noConn=" + noConnectivity));
    }
}

有关详细信息请参阅本

<一个href="http://$c$c.google.com/p/androidwisprclient/source/browse/trunk/src/com/joan/pruebas/NetworkConnectivityListener.java?r=2" rel="nofollow">http://$c$c.google.com/p/androidwisprclient/source/browse/trunk/src/com/joan/pruebas/NetworkConnectivityListener.java?r=2

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