Android,如何在轮询数据时处理网络变化(从GPRS到Wi-fi,反之亦然)

<receiver
  android:name=".NetworkChangeReceiver"
  android:label="NetworkChangeReceiver">
  <intent-filter>
    <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
    <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
  </intent-filter>
</receiver>

并使用以下内容实现Receiver：

public class NetworkChangeReceiver extends BroadcastReceiver {

  @Override
  public void onReceive(final Context context,final Intent intent) {
    final Connectivitymanager connMgr = (Connectivitymanager) 
    context.getSystemservice(Context.CONNECTIVITY_serviCE);

    final android.net.NetworkInfo wifi = 
    connMgr.getNetworkInfo(Connectivitymanager.TYPE_WIFI);

    final android.net.NetworkInfo mobile = 
    connMgr.getNetworkInfo(Connectivitymanager.TYPE_MOBILE);

    if (wifi.isAvailable()) {
      //Do something
    if (mobile.isAvailable()) {
      //Do something else
    }
  }
}

如果您保持持久连接,它将会关闭,您必须重新建立连接.

如果您正在安排服务并且没有保持连接持久,那么您将不会遇到问题.