Javascript Phonegap加速度计不'；行不通
我只是想用加速度计获取一些信息，但它就是不起作用。我的手机是三星Galaxy Y，这款手机有加速计，但当我启动我的应用程序时，它只是说“获取数据”，什么都不起作用 My index.html文件：Javascript Phonegap加速度计不'；行不通,javascript,cordova,accelerometer,Javascript,Cordova,Accelerometer,我只是想用加速度计获取一些信息，但它就是不起作用。我的手机是三星Galaxy Y，这款手机有加速计，但当我启动我的应用程序时，它只是说“获取数据”，什么都不起作用 My index.html文件： <!DOCTYPE html> <html> <head> <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale
<!DOCTYPE html>
<html>
<head>
<meta name="viewport"
content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width;" />
<title>Accelerometer Data</title>
<script type="text/javascript" src="cordova-2.0.0.js"></script>
<!-- Add PhoneGap script here -->
<script type="text/javascript">
// The watch id variable is set as a
// reference to the current 'watchAcceleration'
var watchID = null;
// Set the event listener to run
// when the device is ready
document.addEventListener("deviceready", onDeviceReady, false);
// The device is ready so let's
// start watching the acceleration
function onDeviceReady() {
startWatch();
}
// Watch the acceleration at regular
// intervals as set by the frequency
function startWatch() {
// Set the frequency of updates
// from the acceleration
var options = {
frequency : 3000
};
// Set attributes for control buttons
document.getElementById('startBtn').disabled = true;
document.getElementById('stopBtn').disabled = false;
// Assign watchAcceleration to the watchID variable
// and pass through the options array
watchID = navigator.accelerometer.watchAcceleration(onSuccess, onError,
options);
}
// Stop watching the acceleration
function stopWatch() {
if (watchID) {
navigator.accelerometer.clearWatch(watchID);
watchID = null;
var element = document.getElementById('accelerometerData');
element.innerHTML = 'No longer watching your acceleration.'
// Set attributes for control buttons
document.getElementById('startBtn').disabled = false;
document.getElementById('stopBtn').disabled = true;
}
}
// Run after successful transaction
// Let's display the accelerometer data
function onSuccess(acceleration) {
var element = document.getElementById('accelerometerData');
element.innerHTML = 'Acceleration X: ' + acceleration.x + '<br />'
+ 'Acceleration Y: ' + acceleration.y + '<br />'
+ 'Acceleration Z: ' + acceleration.z + '<br />'
+ 'Timestamp: ' + acceleration.timestamp + '<br />';
}
// Run if we face an error
// obtaining the accelerometer data
function onError() {
// Handle any errors we may face
var element = document.getElementById('accelerometerData');
element.innerHTML = 'Sorry, I was unable to access the acceleration data.';
}
</script>
</head>
<body>
<h1>Accelerometer Data</h1>
<button id="startBtn" onclick="startWatch()">start</button>
<button id="stopBtn" onclick="stopWatch()">stop</button>
<div id="accelerometerData">Obtaining data...</div>
</body>
</html>
感谢您的帮助：）我使用三星tab在cordova 2.5版上试用了您的代码，效果很好。检查您的plugins.xml是否具有以下权限，您可以发现我以前甚至没有这个文件（plugins.xml），所以我导入它并添加这一行，但仍然无法工作。我启动我的应用程序，按下“开始”按钮，什么也没发生。但当我按下“开始”按钮时，我的日志显示：“07-12 11:28:30.757:E/Web控制台（5500）：Uncaught TypeError:无法在处调用未定义的方法“watchAcceleration”file:///android_asset/www/index.html:43 我只是在主线程中添加了我的主活动文件，解决了它。我在失败。只是复制并粘贴了这行代码，没有看到我应该写什么src=“cordova.js”“.对不起我的笨脑袋，谢谢你的帮助，萨利安：）
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.moomob"
android:versionCode="1"
android:versionName="1.0" >
<supports-screens
android:anyDensity="true"
android:largeScreens="true"
android:normalScreens="true"
android:resizeable="true"
android:smallScreens="true" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.BROADCAST_STICKY" />
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="17" />
<application
android:configChanges="orientation|keyboardHidden"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="PhoneGapExamples"
android:configChanges="orientation|keyboardHidden"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="org.apache.cordova.DroidGap"
android:configChanges="orientation|keyboardHidden"
android:label="@string/app_name" >
<intent-filter>
</intent-filter>
</activity>
</application>
</manifest>
package com.example.moomob;
import org.apache.cordova.DroidGap;
import android.os.Bundle;
public class PhoneGapExamples extends DroidGap
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
super.loadUrl("file:///android_asset/www/index.html");
}
}