如何在拨打电话前检查网络可用性?
答
您需要使用ACCESS_NETWORK_STATE
许可,您的清单,然后使用此:
对于所有类型的连接,你可以尝试使用这个(java script
):
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';
alert('Connection type: ' + states[networkState]);
}
checkConnection();
的连接对象允许访问设备的蜂窝和WiFi连接信息。
参考文献:
vogelle-de
how to programmatically check availability of internet connection using jquery
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**谢谢,但您的代码返回错误的2G网络。** – Mehdico 2012-07-21 12:45:01
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@Mehdico请参阅我的编辑,我希望这可以帮助你。 – hasanghaforian 2012-07-22 04:55:46
你的意思是老式的移动网络?或者这是通过互联网的呼叫? – 2012-07-21 12:26:59