Android的网络状态变化检测需要时间 [英] Android network state change detection takes time

问题描述

我想检测我的Andr​​oid应用程序的网络状态变化。我跟着这个问题的答案：检查意图互联网连接

这个作品，但它需要时间的广播接收器检测到的变化。当我打开WiFi或关闭，大约10秒后的onReceive（）方法被调用。这是为什么需要这么多时间？谁能帮助？

感谢

下面是我的code：

 公共类NetworkStateReceiver扩展广播接收器{@覆盖
公共无效的onReceive（上下文的背景下，意图意图）{
    Log.d（应用程序，网络连通性的变化）;
    如果（intent.getExtras（）！= NULL）{
        的NetworkInfo NI =（的NetworkInfo）intent.getExtras（）得到（
                ConnectivityManager.EXTRA_NETWORK_INFO）;
        如果（NI = NULL＆放大器;！＆安培; ni.getState（）== NetworkInfo.State.CONNECTED）{
            Log.i（应用程序，网络+ ni.getTypeName（）+连接）;
            Toast.makeText（上下文，连接，Toast.LENGTH_LONG）.show（）;
        }否则如果（intent.getBooleanExtra（
                ConnectivityManager.EXTRA_NO_CONNECTIVITY，Boolean.FALSE））{
            Toast.makeText（背景下，断开连接，Toast.LENGTH_LONG）.show（）;
            Log.d（应用程序，没有网络连接）;
        }
    }}}
 

在我的清单的应用程序标记：

 ＆lt;接收机器人：名字=com.mypackage.NetworkStateReceiver＆GT;
        ＆所述;意图滤光器＆gt;
            ＆lt;作用机器人：名字=android.net.conn.CONNECTIVITY_CHANGE/＆GT;
        ＆所述; /意图滤光器＆gt;
＆LT; /接收器＆GT;
 

解决方案

我找到了解决办法。

不是扩展广播接收器类和创建NetworkStateChangeReceiver的，我创建了我的活动一个BroadcastReceiver和注册它。现在，它的工作原理和的onReceive（）方法被立即触发。

I am trying to detect network state change in my android app. I followed the answer in that question : Check INTENT internet connection

This works, but it takes time for broadcastreceiver to detect changes. When i turn wifi on or off, about 10 seconds later the onReceive() method is called. Why is that taking so much time? Can anyone help?

Thanks

Here is my code:

public class NetworkStateReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    Log.d("app", "Network connectivity change");
    if (intent.getExtras() != null) {
        NetworkInfo ni = (NetworkInfo) intent.getExtras().get(
                ConnectivityManager.EXTRA_NETWORK_INFO);
        if (ni != null && ni.getState() == NetworkInfo.State.CONNECTED) {
            Log.i("app", "Network " + ni.getTypeName() + " connected");
            Toast.makeText(context, "CONNECTED", Toast.LENGTH_LONG).show();
        } else if (intent.getBooleanExtra(
                ConnectivityManager.EXTRA_NO_CONNECTIVITY, Boolean.FALSE)) {
            Toast.makeText(context, "DISCONNECTED", Toast.LENGTH_LONG).show();
            Log.d("app", "There's no network connectivity");
        }
    }

}

}

and in my Manifest's application tag:

<receiver android:name="com.mypackage.NetworkStateReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
        </intent-filter>
</receiver>

解决方案

I found the solution.

Instead of extending BroadcastReceiver class and creating NetworkStateChangeReceiver, i created a broadcastreceiver on my activity and registered it there. Now it works and onReceive() method is triggered immediately.

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