native怎么监听网络状态变化？

native监听网络状态变化

    // 监听plusready事件    
            document.addEventListener("plusready", function() {  
                var receiver;  
                main = plus.android.runtimeMainActivity(); //获取activity  
                receiver = plus.android.implements('io.dcloud.android.content.BroadcastReceiver', {  
                    onReceive: function(context, intent) { //实现onReceiver回调函数  
                        alert(22222222222);  
                        plus.android.importClass(intent); //通过intent实例引入intent类，方便以后的‘.’操作  
                        console.log(intent.getAction() + "aaaaaaaa"); //获取action  
                        main.unregisterReceiver(receiver); //取消监听  
                    }  
                });  
                var IntentFilter = plus.android.importClass('android.content.IntentFilter');  
                var Intent = plus.android.importClass('android.content.Intent');  
                console.log(Intent);  
                var filter = new IntentFilter();  
                //filter.addAction(Intent.ACTION_CONNECTIVITY_ACTION); //监听apk安装  
                filter.addAction(Intent.ACTION_PACKAGE_ADDED); //监听apk安装  
                filter.addAction(Intent.ACTION_PACKAGE_REMOVED); //监听apk卸载  
                filter.addDataScheme("package");  
                main.registerReceiver(receiver, filter); //注册监听  
                console.log(receiver);  
            }, false);