Android：如何监听网络状态

android no

1，创建一个广播接收者

class NetStateReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context, intent: Intent?) {
        val net = NetUtils(context)
        Urls.networkState = net.NETWORK_TYPE
        Log.e("NetState", "${Urls.networkState.name}")
    }
}

2，在清单文件中注册广播接收者

        <receiver android:name=".component.broadcast.NetStateReceiver">
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            </intent-filter>
        </receiver>

3，在Activity或者Application中启动广播接收者

    override fun onCreate() {
        ...
        val receiver = NetStateBroadCast()
        val filter = IntentFilter()
        filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION)
        registerReceiver(receiver, filter)
    }