我刚开始使用PhoneGap 的File API并且在保存过程中已经遇到了一些问题。这是javascript代码：
function saveCourseToFile() {
console.log("checkpoint 1");
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFSSuccess, onFSError);
}
function onFSSuccess(fileSystem) {
console.log("checkpoint 2");
console.log("Opened file system: " + fileSystem.name);
fileSystem.root.getFile("course.oerk", {create:true, exclusive:false}, gotFileEntry, onFSError);
}
function gotFileEntry(fileEntry) {
console.log("checkpoint 3");
fileEntry.createWriter(gotFileWriter, onFSError);
}
function gotFileWriter(writer) {
writer.onwrite = function(evt) {
console.log("checkpoint 4: write success!");
};
writer.write("test test test");
}
function onFSError(err) {
console.log(err.code);
}
更新：
<script type="text/javascript">
function init() {
document.addEventListener("deviceready", onDeviceReady, false);
}
</script>
<body onload="init()">
<div id="page1">
<a href="#page2">Click me</a>
</div>
<div id="page2">
<script type="text/javascript">
saveCourseToFile();
</script>
<p>Text text text text</p>
</div>
</body>
但是在设备文件系统中没有这样的文件（course.oerk）。这是一段logcat：
02-18 22:36:55.542: D/Cordova(746): onPageFinished(file:///android_asset/www/index.html#coursesPage)
02-18 22:36:55.542: D/Cordova(746): Trying to fire onNativeReady
02-18 22:36:55.552: D/DroidGap(746): onMessage(onNativeReady,null)
02-18 22:36:55.552: D/DroidGap(746): onMessage(onPageFinished,file:///android_asset/www/index.html#coursesPage)
02-18 22:36:56.223: I/Choreographer(746): Skipped 36 frames! The application may be doing too much work on its main thread.
任何帮助，将不胜感激。