我正在使用 phonegap 开发一个移动 Web 应用程序，并可能稍后将其转移到其他平台，例如 android 等。
我希望能够写入设备上的本地文件，但是，无论我做什么，它都不起作用。没有适当的文档来支持此类问题。
如果有人可以提供帮助，我将不胜感激。
这是我的html文件：
<!DOCTYPE html>
<html>
<head>
<!--<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no;" />-->
<meta name="viewport" content="width=device-width,initial-scale=1"/>
<link rel="stylesheet" href="jquery/jquery.mobile-1.0.1.min.css"/>
<script src="jquery/jquery-1.6.4.min.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css"/>
<script src="jquery/jquery.mobile-1.0.1.min.js"></script>
<title>Hello World</title>
<!-- iPad/iPhone specific css below, add after your main css >
<link rel="stylesheet" media="only screen and (max-device-width: 1024px)" href="ipad.css" type="text/css" />
<link rel="stylesheet" media="only screen and (max-device-width: 480px)" href="iphone.css" type="text/css" />-->
<!-- If your application is targeting iOS BEFORE 4.0 you MUST put json2.js from http://www.JSON.org/json2.js into your www directory and include it here -->
<script type="text/javascript" charset="utf-8" src="cordova-1.5.0.js"></script>
<script type="text/javascript" charset="utf-8" src="NativeControls.js"></script>
<script type="text/javascript" charset="utf-8" src="js/main.js"></script>
</head>
<body onload="onBodyLoad()">
<div data-role="page" id="mainpage">
<div data-role="header">
<h1>LOGIN</h1>
</div>
<div data-role="content">
<img src="images/cslogosmall2.png" style="margin-top: -10px; margin-left: -5px;"/>
<form id="login" method="post">
<p>
<ul data-role="listview" data-theme="g" id="contentlist">
<b>Program:</b>
<input type="text" id="program"/>
<b>Username:</b>
<input type="text" id="username"/>
<b>Password:</b>
<input type="password" id="password"/>
</ul>
</p>
<br/>
<button type="submit" data-theme="a" id="submit" value="Submit"></button>
<a href="offline.html" onclick="test();">Offline</a>
</form>
</div>
<!--<div data-role="footer">
<h1> Main Page Footer </h1>
</div>-->
</div>
<div data-role="page" id="contentpage">
<div data-role="header">
<h1> Content Page </h1>
</div>
<div data-role="content">
<a href="#" data-role="button" onclick="history.go(-1);return false;" onClick=buttonDemo()> Back to Main Page </a>
<a href="#" data-role="button" id="beepbtn" onClick=beepbeep()> Beep!</a>
</div>
<div data-role="footer">
<h1> Content Page Footer </h1>
</div>
</div>
</body>
</html>
这是我的 javascript 文件：
function validate() {
navigator.notification.alert("validate called");
var program = document.getElementById('program');
var username = document.getElementById('username');
var password = document.getElementById('password');
if (!program || program == "") {
navigator.notification.alert("Please enter a program");
return false;
}
else if (!username || username == "") {
navigator.notification.alert("Please enter a username");
return false;
}
else if (!password || password == "") {
navigator.notification.alert("Please enter a password");
return false;
}
return true;
}
function beepbeep() {
//navigator.notification.alert("Beep function called");
navigator.notification.beep();
}
$(document).ready(function() {
$('#submit').click(function() {
var program = document.getElementById('program').value;
var username = document.getElementById('username').value;
var password = document.getElementById('password').value;
if (!program || program == "") {
alert("Please enter a program", null, "ClearSpider", "OK");
return false;
}
else if (!username || username == "") {
alert("Please enter a username", null, "ClearSpider", "OK");
return false;
}
else if (!password || password == "") {
alert("Please enter a password", null, "ClearSpider", "OK");
return false;
}
return true;
});
document.addEventListener("deviceready", onDeviceReady, false);
window.addEventListener("resize", orientationChange, false);
});
function test() {
console.log("fail");
var fs = FileWriter.write(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
alert(LocalFileSystem.PERSISTENT);
alert("Test called");
}
function onTabBarItem(id)
{
alert("hello");
//jQT.goTo("#" + id, "slide");
// if you need to modify the tabbar items that are shown, you should do
// so here.
}
function fail(error) {
console.log(error.code);
}
function gotFS(fileSystem) {
alert("at gotFS");
fileSystem.root.getFile("readme.txt", {create: true}, gotFileEntry, fail);
}
function gotFileEntry(fileEntry) {
alert("at gotFileEntry");
fileEntry.createWriter(gotFileWriter, fail);
}
function gotFileWriter(writer) {
alert("at gotFileWriter");
writer.onwrite = function(evt) {
console.log("write success");
};
writer.write("some sample text");
// contents of file now 'some sample text'
writer.truncate(11);
// contents of file now 'some sample'
writer.seek(4);
// contents of file still 'some sample' but file pointer is after the 'e' in 'some'
writer.write(" different text");
// contents of file now 'some different text'
}
/* When this function is called, Cordova has been initialized and is ready to roll */
/* If you are supporting your own protocol, the var invokeString will contain any arguments to the app launch.
see http://iosdevelopertips.com/cocoa/launching-your-own-application-via-a-custom-url-scheme.html
for more details -jm */
function onDeviceReady() {
// Initializating TabBar
//window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
navigator.notification.alert("hi kaan", null, "hey", "SWEET");
Cordova.exec("NativeControls.createTabBar");
//var options = "top";
var options = "bottom";
navigator.notification.alert(window.requestFileSystem);
window.onorientationchange = function() {
var orientation = window.orientation;
switch(orientation) {
case 0:
Cordova.exec("NativeControls.showTabBar", options);
Cordova.exec("NativeControls.showToolBar");
/* Add a descriptive message on "Handling iPhone or iPod touch Orientation Events" */
document.getElementById("currentOrientation").innerHTML="Now in portrait orientation (Home button on the bottom).";
break;
case 90:
Cordova.exec("NativeControls.showTabBar", options);
Cordova.exec("NativeControls.showToolBar");
document.getElementById("currentOrientation").innerHTML="Now in landscape orientation and turned to the left (Home button to the right).";
break;
case -90:
Cordova.exec("NativeControls.showTabBar", options);
Cordova.exec("NativeControls.showToolBar");
document.getElementById("currentOrientation").innerHTML="Now in landscape orientation and turned to the right (Home button to the left).";
break;
default:
Cordova.exec("NativeControls.showTabBar", options);
Cordova.exec("NativeControls.showToolBar");
document.getElementById("currentOrientation").innerHTML="Now the orientation must be -180. default: case: ";
break;
}//end switch
}//end window.orientationchange
//var taboptions = {"onSelect":onTabBarItemSelect};
var moreNum = 1;
Cordova.exec("NativeControls.showTabBar", options);
var onSelect = {"onSelect":onTabBarItem};
//onSelect = "hahaha";
Cordova.exec("NativeControls.createTabBarItem", "test", "test", "tabButton:Recents", onSelect);
Cordova.exec("NativeControls.createTabBarItem", "test2", "test2", "tabButton:Search", onSelect);
Cordova.exec("NaviteControls.createTabBarItem", "test3", null, "tabButton:More", onSelect);
Cordova.exec("NativeControls.showTabBarItems", "test", "test2", "test3");
Cordova.exec("NativeControls.selectTabBarItem", "test");
//Cordova.exec("NativeControls.tabBarItemSelected", "1");
/*nativeControls = window.plugins.nativeControls;
navigator.notification.alert(nativeControls);
nativeControls.createTabBar();
// Books tab
nativeControls.createTabBarItem(
"books",
"Books",
"tabButton:Recents",
"",
{"onSelect": function() {
books();
}}
);
// Stats tab
nativeControls.createTabBarItem(
"finished",
"Finished",
"tabButton:Recents",
"",
{"onSelect": function() {
finished();
}}
);
// About tab
nativeControls.createTabBarItem(
"about",
"About",
"tabButton:Recents",
"",
{"onSelect": function() {
about();
}}
);
// Compile the TabBar
nativeControls.showTabBar();
nativeControls.showTabBarItems("books", "finished", "about");
nativeControls.selectTabBarItem("books");*/
}
function orientationChange() {
var nativeControls = window.plugins.nativeControls;
nativeControls.resizeTabBar();
}
function books() {
}
function about() {
}
function finished(){
}
请注意，此行不起作用：
navigator.notification.alert(window.requestFileSystem);不显示警报。