phonegap3.4 检查网络状态

来源：互联网发布：自动数字组合软件编辑：程序博客网时间：2024/05/17 03:27

参考文档：

https://github.com/apache/cordova-plugin-network-information/blob/master/doc/index.md

1、安装插件

cordova plugin add org.apache.cordova.network-information

2、js脚本

var networkState = navigator.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.CELL]     = 'Cell generic connection';    states[Connection.NONE]     = 'No network connection';    console.log('Connection type: ' + states[networkState]);

3、修改后台java类：NetworkManager

安装好插件后，如果联网状态下，应用运行没有问题，但是在断网状态下，应用无法启动

private JSONObject getConnectionInfo(NetworkInfo info) {        String type = TYPE_NONE;        if (info != null) {            // If we are not connected to any network set type to none            if (!info.isConnected()) {                type = TYPE_NONE;            }            else {                type = getType(info);            }        }        /***********open************/        String extraInfo = null;        if(info != null){        extraInfo = info.getExtraInfo();        }//        String extraInfo = info.getExtraInfo();        /***********************/        Log.d("CordovaNetworkManager", "Connection Type: " + type);        Log.d("CordovaNetworkManager", "Connection Extra Info: " + extraInfo);        JSONObject connectionInfo = new JSONObject();        try {            connectionInfo.put("type", type);            connectionInfo.put("extraInfo", extraInfo);        } catch (JSONException e) { }        return connectionInfo;    }

上面的代码中，info为null，导致应用启动过程中抛出异常，修改了源码

这个异常应该不会是官方的bug，但是在我的应用中会报错，其他的插件用起来都没有问题，唯独这个插件。原因待查明。

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