大家好我正在尝试使用这个简单的代码来检查文件是否存在，如果没有下载它。但它始终只显示“正在检查数据文件”。
可能是什么原因？
的index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title></title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" type="text/css" href="css/app.css" />
</head>
<body>
<h2>My App</h2>
<div id="status"></div>
<script src="cordova.js"></script>
<script src="js/app.js"></script>
</body>
</html>
app.js
document.addEventListener("deviceready", init, false);
//The directory to store data
var store;
//Used for status updates
var $status;
//URL of our asset
var assetURL = "https://raw.githubusercontent.com/cfjedimaster/Cordova-Examples/master/readme.md";
//File name of our important data file we didn't ship with the app
var fileName = "mydatafile.txt";
function init() {
$status = document.querySelector("#status");
$status.innerHTML = "Checking for data file.";
store = cordova.file.dataDirectory;
//Check for the file.
window.resolveLocalFileSystemURL(store + fileName, appStart, downloadAsset);
}
function downloadAsset() {
var fileTransfer = new FileTransfer();
console.log("About to start transfer");
fileTransfer.download(assetURL, store + fileName,
function(entry) {
console.log("Success!");
appStart();
},
function(err) {
console.log("Error");
console.dir(err);
});
}
//I'm only called when the file exists or has been downloaded.
function appStart() {
$status.innerHTML = "App ready!";
}
这些只是android Studio中logcat输出的最后几行，因为在这里插入所有内容太多了：
10-22 16:46:40.927 2315-2315/? E/PGA﹕ PgaUtilsParamSize: unsuported param GL_CULL_FACE, assuming size 1
10-22 16:46:40.927 2315-2315/? E/PGA﹕ PgaUtilsParamSize: unsuported param GL_DITHER, assuming size 1
-22 16:47:48.367 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:48:43.477 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:48:48.827 30217-2359/? D/BstCommandProcessor-httpd﹕ command: ping
10-22 16:48:48.827 30217-2359/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:48:48.847 30217-2360/? D/BstCommandProcessor-httpd﹕ command: clipboard (with args)
10-22 16:48:48.847 30217-2360/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:49:38.587 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:50:33.697 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:50:42.037 30217-2361/? D/BstCommandProcessor-httpd﹕ command: ping
10-22 16:50:42.037 30217-2361/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:50:42.257 30217-2362/? W/BstCommandProcessor-httpd﹕ Reached maxLineLength limit while reading the content of a file
10-22 16:50:42.257 30217-2362/? D/BstCommandProcessor-httpd﹕ command: clipboard (with args)
10-22 16:50:42.267 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1969K, 24% free 6849K/8896K, paused 0ms, total 0ms
10-22 16:50:42.277 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1557K, 24% free 6850K/9004K, paused 10ms, total 10ms
10-22 16:50:42.287 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1318K, 24% free 6854K/9004K, paused 10ms, total 10ms
10-22 16:50:42.297 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1230K, 24% free 6851K/9012K, paused 10ms, total 10ms
10-22 16:50:42.307 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1215K, 24% free 6852K/9012K, paused 0ms, total 0ms
10-22 16:50:42.307 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1161K, 24% free 6858K/9012K, paused 0ms, total 0ms
10-22 16:50:42.317 30217-2362/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1101K, 24% free 6862K/9012K, paused 10ms, total 10ms
10-22 16:50:42.317 30217-2362/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:51:28.807 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:52:00.027 30100-30111/? D/dalvikvm﹕ GC_FOR_ALLOC freed 7538K, 38% free 12639K/20212K, paused 10ms, total 20ms
10-22 16:52:23.917 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:53:19.027 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:53:26.057 30217-2363/? D/BstCommandProcessor-httpd﹕ command: ping
10-22 16:53:26.057 30217-2363/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:53:26.077 30217-2364/? W/BstCommandProcessor-httpd﹕ Reached maxLineLength limit while reading the content of a file
10-22 16:53:26.077 30217-2364/? D/BstCommandProcessor-httpd﹕ command: clipboard (with args)
10-22 16:53:26.097 30217-2364/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1795K, 25% free 6825K/9020K, paused 10ms, total 10ms
10-22 16:53:26.097 30217-2364/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1489K, 25% free 6824K/9020K, paused 0ms, total 0ms
10-22 16:53:26.117 30217-2364/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1352K, 25% free 6825K/9020K, paused 10ms, total 10ms
10-22 16:53:26.117 30217-2364/? D/dalvikvm﹕ GC_FOR_ALLOC freed 1251K, 25% free 6836K/9020K, paused 0ms, total 0ms
10-22 16:53:26.127 30217-2364/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:54:14.137 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:54:23.877 30217-2365/? D/BstCommandProcessor-httpd﹕ command: ping
10-22 16:54:23.877 30217-2365/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:54:23.887 30217-2366/? D/BstCommandProcessor-httpd﹕ command: clipboard (with args)
10-22 16:54:23.887 30217-2366/? D/BstCommandProcessor-httpd﹕ response: {"result":"ok"}
10-22 16:54:30.017 29999-30062/? D/ConnectivityService﹕ Sampling interval elapsed, updating statistics ..
10-22 16:54:30.017 29999-30062/? D/ConnectivityService﹕ Done.
10-22 16:54:30.017 29999-30062/? D/ConnectivityService﹕ Setting timer for 720seconds
10-22 16:54:30.197 29999-30062/? D/ConnectivityService﹕ handleInetConditionChange: net=1 != default=9 - ignore
10-22 16:55:09.247 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:55:41.237 29999-29999/? I/EntropyMixer﹕ Writing entropy...
10-22 16:56:04.357 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
10-22 16:56:59.467 30178-30897/? D/dalvikvm﹕ GC_FOR_ALLOC freed 736K, 29% free 2727K/3840K, paused 0ms, total 0ms
答案 0 :(得分：0)
@ Taurus22，
您可能正在使用最新版本的编译器。这是Cordova / Phonegap新开发人员的常见问题。您有whitelist个问题。
另一种选择就是快速修复 - 但要知道此快速修复会消除white-list的所有需求。这会创建一个您可能不希望通过的security issue。
快速修正将此添加到config.xml PHONEGAP BUILD ONLY
<preference name="phonegap-version" value="3.7.0" />
答案很长：
来自Top Mistakes by Developers new to Cordova/Phonegap你已经点击了：
对于＃6＆amp; ＃7
使用CLI版本，如果您没有为您的平台分配版本，或者如果您未在config.xml中设置phonegap-version，则在“Phonegap Build”中，您将获得最新版本。如果运气好，您的程序就会按预期运行。如果你不幸运，你会得到一系列级联错误。
幸运的是，对于我们所有人来说，Holly Schinsky写了一篇很好的博文来解释这一切：
Cordova / PhoneGap版本混淆
http://devgirl.org/2014/11/07/cordovaphonegap-version-confusion/
＃10
这个相对*新*要求意味着 - 要访问网络上的任何网站或资源，您必须使用白名单和白名单插件。如果您使用cordova-android@4.0.0或更高版本，此要求将生效;包括cli-5.1.1和cli-5.2.0。但是，如果您的版本在4.0.0之前，假设为3.5.0或3.7.0，则不必须添加 white-list 要求。
要明确的是，“白名单”已经存在了一段时间，但插件和要求非常新。正如您所料，当添加“白名单”时，不推荐使用事实上的开放访问功能。或者说另一种方式，事实上开放访问功能已被计划并计划被淘汰。此更改标志着删除开放访问功能的一个步骤。
此外，内容安全策略（CSP）已经吸引了众多开发人员 - 因为它的公开性很差。 根据您的使用情况和您使用的Phonegap版本，CSP需要进入您使用的每个HTML页面，就像您必须等待'deviceready'一样。但是，有些情况根本不需要它。文档让一些人感到困惑，请仔细阅读。文档隐藏在许多最新文档页面的底部。
最后，Raymond Camden在他的博客中指出LARGE change in policy starting with Cordova 5
相关链接
Phonegap Build Forum：Notes for upgrading to cli-5.1.1 on PGB，现在需要白名单