Question

我一直在开发一个软件电话应用程序，它在切换连接时重新注册到SIP服务器时遇到问题。我有一个处理CONNECTIVITY_CHANGE的BroadcastReciever，但我遇到了逻辑问题。

我的代码：

@Override
public void onReceive(Context context, Intent intent) {
    debugIntent(intent);
    SipManager sipManager = (SipManager) context.getApplicationContext();
    ConnectivityManager cm = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();

    if(activeNetwork != null){
        boolean isActiveConnected = activeNetwork != null && activeNetwork.isConnected();

        LogText.appendLog(TAG + "  Type: " + activeNetwork.getTypeName() + " isActiveConnected: " + isActiveConnected);

        if(isActiveConnected){
            sipManager.reRegister;
        }
        else {
            sipManager.lostConnectionUpdate();
        }
    }
    else {
        sipManager.lostConnectionUpdate();
    }
}

private void debugIntent(Intent intent) {
    LogText.appendLog(TAG + " action: " + intent.getAction());
    LogText.appendLog(TAG + " component: " + intent.getComponent());
    Bundle extras = intent.getExtras();
    if (extras != null) {
       for (String key: extras.keySet()) {
          LogText.appendLog(TAG + " key [" + key + "]: " +extras.get(key)); 
       }
    }
    else {
       LogText.appendLog(TAG + "no extras");
    }
 }

问题：

我应该使用什么NetworkInfo？

从上下文或意图中获取NetworkInfo是否更好？

我查看我的日志并看到当我的debugIntent方法显示我已断开连接时，无论如何我的isActiveConnected布尔返回true。

任何帮助都会很棒。

由于

Answer 1

我使用此静态方法检查设备是否具有连接。它工作得很好。

public static boolean hasConnectivity(final Context context, final Intent intent) {
    final ConnectivityManager mConnMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = null;
    try {
        info = ConnectivityManagerCompat.getNetworkInfoFromBroadcast(mConnMan, intent);
    } catch (final Exception e) {
        info = mConnMan.getActiveNetworkInfo();
    }
    return info != null && info.isConnectedOrConnecting();
}

如果需要，您可以将info.isConnectedOrConnecting()更改为info.isConnected()。

在您的广播接收器中，您可以致电：

boolean connected = hasConnectivity(context, intent);

Answer 2

这就是我要做的，请记住，只要您的代码正常运行，使用什么方法并不重要。

我在这里向您展示的代码有解释可以做什么的评论。

public class ConnectionBroadcast extends BroadcastReceiver {

    public void onReceive(Context context, Intent intent) {

        String action = intent.getAction();
        if (action.equals("android.net.conn.CONNECTIVITY_CHANGE")) {


            //An instance of connectivity manager
            ConnectivityManager conn = (ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            //In order to access methods created in the MainActivity from this broadcast
            MainActivity main = (MainActivity)context;


            //Get wifi and mobile connections
            NetworkInfo wifi = conn.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            NetworkInfo mobile = conn
                    .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);



            if (wifi.isConnected() || mobile.isConnected()) {

                //When the device is connected, connect or re-connect to the SIP server
                //Example:
                main.connectToSip()


            } else {

                //The device is not connected, disconnected from the sip server in order
                //to re-register when the device gets connected again
                main.disconnectSip();

            }

        }

    }

}

如果您还有其他问题，可以告诉我，因为我只花了大约5个月的时间从事类似项目。

Answer 3

我试图用我的代码解决您的问题。任何人都可以签入我由kotlin代码使用的Github Android Network Connection。即使已弃用，但仍可像魔术一样工作

ActiveNetworkInfo是正确的NetworkInfo吗？

3 个答案: