【发布时间】：2016-01-17 00:45:25
【问题描述】：
我必须使用 phongap 开发一个从设备检索传感器数据的 Android 应用程序。
我必须听的其中一个传感器是环境光传感器。这个传感器在 phoneGap 中没有实现，所以我必须将它作为插件添加到 PhoneGap。
我知道如何添加插件，也知道如何从 Java 访问 ALS 数据 - 但为了确保我很好地实现它，我想实现它，因为 PhoneGap 实现了其他传感器，如 Accelerometer。因此，我在 java 中编写了一个 ALSManager 类，因为我发现 Accelerometer 是在这里实现的：
并添加了 lightSensor 和 lightValues 模块，如加速器和加速模块。
但是当我运行这个应用程序时，我收到了以下错误消息：
TypeError: Object # has no method 'getCurrentLight'
（在 lightSensor 模块中我有 getCurrentLight 方法）。
有人可以建议我缺少什么吗？或者我该怎么办？
提前致谢，
我在cordova-2.5.0.js 中添加的代码。如果还不够，请告诉我：
// file: lib/common/plugin/LightValues.js
define("cordova/plugin/LightValues", function(require, exports, module) {
var Acceleration = function(lux, timestamp) {
this.lux = lux;
this.timestamp = timestamp || (new Date()).getTime();
};
module.exports = LightValues;
});
// file: lib/common/plugin/lightSensor.js
define("cordova/plugin/lightSensor", function(require, exports, module) {
/**
* This class provides access to device accelerometer data.
* @constructor
*/
var argscheck = require('cordova/argscheck'),
utils = require("cordova/utils"),
exec = require("cordova/exec"),
LightValues = require('cordova/plugin/LightValues');
// Is the accel sensor running?
var running = false;
// Keeps reference to watchAcceleration calls.
var timers = {};
// Array of listeners; used to keep track of when we should call start and stop.
var listeners = [];
// Last returned acceleration object from native
var light = null;
// Tells native to start.
function start() {
exec(function(a) {
var tempListeners = listeners.slice(0);
light = new LightValues(a.lux, a.timestamp);
for (var i = 0, l = tempListeners.length; i < l; i++) {
tempListeners[i].win(light);
}
}, function(e) {
var tempListeners = listeners.slice(0);
for (var i = 0, l = tempListeners.length; i < l; i++) {
tempListeners[i].fail(e);
}
}, "Light", "start", []);
running = true;
}
// Tells native to stop.
function stop() {
exec(null, null, "Light", "stop", []);
running = false;
}
// Adds a callback pair to the listeners array
function createCallbackPair(win, fail) {
return {win:win, fail:fail};
}
// Removes a win/fail listener pair from the listeners array
function removeListeners(l) {
var idx = listeners.indexOf(l);
if (idx > -1) {
listeners.splice(idx, 1);
if (listeners.length === 0) {
stop();
}
}
}
var lightSensor = {
/**
* Asynchronously acquires the current acceleration.
*
* @param {Function} successCallback The function to call when the acceleration data is available
* @param {Function} errorCallback The function to call when there is an error getting the acceleration data. (OPTIONAL)
* @param {AccelerationOptions} options The options for getting the accelerometer data such as timeout. (OPTIONAL)
*/
getCurrentLight: function(successCallback, errorCallback, options) {
//argscheck.checkArgs('fFO', 'lightSensor.getCurrentLight', arguments);
var p;
var win = function(a) {
removeListeners(p);
successCallback(a);
};
var fail = function(e) {
removeListeners(p);
errorCallback && errorCallback(e);
};
p = createCallbackPair(win, fail);
listeners.push(p);
if (!running) {
start();
}
},
/**
* Asynchronously acquires the acceleration repeatedly at a given interval.
*
* @param {Function} successCallback The function to call each time the acceleration data is available
* @param {Function} errorCallback The function to call when there is an error getting the acceleration data. (OPTIONAL)
* @param {AccelerationOptions} options The options for getting the accelerometer data such as timeout. (OPTIONAL)
* @return String The watch id that must be passed to #clearWatch to stop watching.
*/
watchLight: function(successCallback, errorCallback, options) {
//argscheck.checkArgs('fFO', 'lightSensor.watchLight', arguments);
// Default interval (10 sec)
var frequency = (options && options.frequency && typeof options.frequency == 'number') ? options.frequency : 10000;
// Keep reference to watch id, and report accel readings as often as defined in frequency
var id = utils.createUUID();
var p = createCallbackPair(function(){}, function(e) {
removeListeners(p);
errorCallback && errorCallback(e);
});
listeners.push(p);
timers[id] = {
timer:window.setInterval(function() {
if (light) {
successCallback(light);
}
}, frequency),
listeners:p
};
if (running) {
// If we're already running then immediately invoke the success callback
// but only if we have retrieved a value, sample code does not check for null ...
if (light) {
successCallback(light);
}
} else {
start();
}
return id;
},
/**
* Clears the specified accelerometer watch.
*
* @param {String} id The id of the watch returned from #watchAcceleration.
*/
clearWatch: function(id) {
// Stop javascript timer & remove from timer list
if (id && timers[id]) {
window.clearInterval(timers[id].timer);
removeListeners(timers[id].listeners);
delete timers[id];
}
}
};
module.exports = lightSensor;
});
【问题讨论】：
-
您能发布您的 config.xml 和 javascript 文件吗？听起来好像从 javascript 到 java 的映射是错误的。
-
您能告诉我您的电子邮件地址吗？我会把文件发给你吗？它们太长了……
-
好吧，我希望我们继续在这里讨论，以便任何偶然发现这个问题的人都能得到答案。您可以使用 pastebucket.com 之类的服务来共享代码，或者您可以在 github 上创建一个帐户并 fork cordova-android 并在那里共享代码。您可能也不需要发布整个文件，只需将插件的 javascript 端添加到页面的部分以及列出插件的 config.xml 即可。
-
@MBillau：请参阅上面的编辑
标签： android cordova phonegap-plugins