检查与phonegap的互联网连接 [英] check internet connection with phonegap

问题描述

我看到几个不同的选项来检查与phonegap的互联网连接。有 document.addEventListener（online，onOnline，false）; 还有 navigator.network.connection.type ...但我不知道哪一个是最佳实践。我也希望能够防止手机连接到WiFi网络但没有互联网连接的情况。

I am seeing a few different options to check internet connection with phonegap. There is document.addEventListener("online", onOnline, false); and there is also navigator.network.connection.type... but I am not sure which one is best practice. I would also like to be able to prevent the bad case where the phone is connected to a wifi network but has no internet connection.

$(document).on('pagecreate','#explanation-short', function(){
     if ( isPhoneGap() ) {
    if (checkConnection() == "none" ) {
        connectionStatus = 'offline'; 
    } else {
        connectionStatus = 'online';
    }
    function checkConnection() {
        var networkState = navigator.network.connection.type;
        var states = {};
        states[Connection.UNKNOWN]  = 'Unknown connection';
        states[Connection.ETHERNET] = 'Ethernet connection';
        states[Connection.WIFI]     = 'WiFi connection';
        states[Connection.CELL_2G]  = 'Cell 2G connection';
        states[Connection.CELL_3G]  = 'Cell 3G connection';
        states[Connection.CELL_4G]  = 'Cell 4G connection';
        states[Connection.NONE]     = 'No network connection';
        //console.log('Connection : ' + Connection);
        //console.log('Connection type: ' + states[networkState]);
        return networkState;
    }
} else {
    connectionStatus = navigator.onLine ? 'online' : 'offline';
}
    console.log("connectionStatus : "+connectionStatus);
});

例如，此代码适用于手机连接到wifi，但我们不确定

For example, this code works if the phone is connected to the wifi, but we are not sure the internet is actually available.

有关Phonegap 3.3+和Jquery mobile 1.4的最佳做法是什么？

What are the best practices with phonegap 3.3+ and Jquery mobile 1.4 ?

推荐答案

document.addEventListener("online", onOnline, false);

仅在应用程序已加载并重新连接时触发。

is only fired when your app is already is loaded and regains a connection. This is not fired on start of the application.

因此，您必须使用 checkConnection（）方法启动应用程序，然后如果您需要稍后在应用程序运行时检查，请使用事件侦听器。

Therefore, you have to use the checkConnection() method on start of your application and then if you need to check later while the app is running, you use the event listener.

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