cordova 3.0：Android：未定义连接 [英] cordova 3.0: Android: Connection is not defined

问题描述

我第一次尝试使用Apache Cordova 3.0。

my first time experimenting with Apache Cordova 3.0.

已下载lib，解压缩cordova-android和cordova-js并创建了一个项目：

downloaded lib, unziped cordova-android and cordova-js and created a project:

./create ~/Documents/andriod-projects/HelloWorld com.x.HelloWorld HelloWorld
- OK

res / xml / config.xml

res/xml/config.xml

<plugin name="NetworkStatus" value="org.apache.cordova.NetworkManager" />

AndroidManifest.xml

AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

on index.js设备就绪：

on index.js device ready:

bindEvents: function() {
    document.addEventListener('deviceready', this.onDeviceReady, false);
},

onDeviceReady: function() {

    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';

    alert("Network: "+states[networkState]);
}

当我在我的orriod上模拟项目我在LogCat 错误：未定义连接：

when I emulate the project on my andriod I got in LogCat Error:Connection is not defined:

我缺少什么？我必须附加一个.js以便连接声明？

what I am missing? I have to attach a .js in order to Connection be declared?

推荐答案

未捕获的反射错误：未定义连接

Uncaught Refference error: Connection is not defined

与缺少连接对象相关，根据我对corodva 3.1.0的经验，变得可用，甚至在benka建议的延迟后。这个特殊的问题可以通过使用navigator.connection对象的常量来解决，如下所示：

is related to lack of a "Connection" object, which based on my experience with corodva 3.1.0 does not become available, even after a delay as benka suggested. This particular issue can be solved by using the constants of the navigator.connection object as below:

var states = {};
states[navigator.connection.UNKNOWN]  = 'Unknown connection';
states[navigator.connection.ETHERNET] = 'Ethernet connection';
states[navigator.connection.WIFI]     = 'WiFi connection';
states[navigator.connection.CELL_2G]  = 'Cell 2G connection';
states[navigator.connection.CELL_3G]  = 'Cell 3G connection';
states[navigator.connection.CELL_4G]  = 'Cell 4G connection';
states[navigator.connection.CELL]     = 'Cell generic connection';
states[navigator.connection.NONE]     = 'No network connection';

不幸的是，在我的情况下，这只是在android上网络状态的问题的开始

unfortunately in my case this was only the beginning of issues with network status on android as

navigator.connection.type

$ b b

始终返回0，这是未知连接。两者在Android上的模拟器和一个设备。对我有用的解决方法是直接调用插件类：

would always return 0 which is Unknown connection. Both on the android emulator and a device. A workaround which works for me is to call the plugin class directly:

document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
    var conn = checkConnection();
    alert("Connection:"+conn);


}
function checkConnection(){
        var networkState;
        var test = cordova.exec(
                function(winParam) {networkState = winParam;},
                function(error) {alert("Network Manager error: "+error);},
                "NetworkStatus",
                "getConnectionInfo",
                []
        );
        return networkState;
}

这个代码在函数中有一个丑陋的networkState赋值，可能会异步执行后的checkConnection返回语句，但作为本机代码返回PluginResult里面的execute函数 - 这工作。返回的networkState值与navigator.connection不匹配。常数如：

this code has an ugly networkState assignment inside a function that could potentially be executed asynchronously after the checkConnection return statement, but as the native code returns PluginResult inside the execute function - this works. The networkState value returned does not match the navigator.connection. constants like:

navigator.connection.WIFI

您可以在这里看到插件源代码中返回的值：https://github.com/apache/cordova-plugin-network-information/blob/master/src/android/NetworkManager.java

You can see the values returned in the plugins source code here: https://github.com/apache/cordova-plugin-network-information/blob/master/src/android/NetworkManager.java

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