在phonegap上使用android编写和读取.txt文件需要帮助_Android_File Io_Cordova

在phonegap上使用android编写和读取.txt文件需要帮助

android file-io cordova

在phonegap上使用android编写和读取.txt文件需要帮助,android,file-io,cordova,Android,File Io,Cordova,大家好我是phonegap的新手。。我想在android上使用phonegap创建文件和写入文件，下面的代码不适合我这是我的文件.html，位于*android\u资产/www/File.html* <!DOCTYPE HTML> <html> <head> <meta name="viewport" content="width=320; user-scalable=no" /> <meta http-

大家好我是phonegap的新手。。我想在android上使用phonegap创建文件和写入文件，下面的代码不适合我

这是我的文件.html，位于*android\u资产/www/File.html*

 <!DOCTYPE HTML>
    <html>
    <head>
    <meta name="viewport" content="width=320; user-scalable=no" />
    <meta http-equiv="Content-type" content="text/html; charset=utf-8">
    <title>PhoneGap</title>
    <link rel="stylesheet" href="master.css" type="text/css" media="screen"
        title="no title" charset="utf-8">
    <script type="text/javascript" charset="utf-8" src="phonegap.0.9.5.1.js"></script>
    <script type="text/javascript" charset="utf-8" src="main.js"></script>
    <script type="text/javascript" charset="utf-8">

        // Wait for PhoneGap to load
        //
        document.addEventListener("deviceready", onDeviceReady, false);

        // PhoneGap is ready
        //
        function onDeviceReady() {
            window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
        }

        function gotFS(fileSystem) {
            fileSystem.root.getFile("test.txt", null, gotFileEntry, fail);
        }

        function gotFileEntry(fileEntry) {
            fileEntry.createWriter(gotFileWriter, fail);
        }

        function gotFileWriter(writer) {
            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'
        }

        function fail(error) {
            console.log(error.code);
        }

        </script>

    </head>
    <body>
    <h1>Example</h1>
    <p>Write File</p>

    </body>
    </html>

logcat是这样显示的

07-06 13:15:10.732: DEBUG/ddm-heap(356): Got feature list request
07-06 13:15:10.742: DEBUG/dalvikvm(30): GC freed 283 objects / 10848 bytes in 278ms
07-06 13:15:10.922: DEBUG/dalvikvm(30): GC freed 45 objects / 2008 bytes in 160ms
07-06 13:15:11.103: DEBUG/dalvikvm(30): GC freed 2 objects / 48 bytes in 119ms
07-06 13:15:11.593: INFO/System.out(356): Native Geolocation not supported - we're ok
07-06 13:15:11.602: INFO/System.out(356): loadUrl(file:///android_asset/www/File.html)
07-06 13:15:11.622: INFO/System.out(356): url=file:///android_asset/www/File.html baseUrl=file:///android_asset/www
07-06 13:15:11.731: WARN/InputManagerService(51): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@438c1e70 (uid=10001 pid=95)
07-06 13:15:11.792: INFO/ActivityManager(51): Displayed activity android.com.testfile/.testfileActivity: 1429 ms (total 1429 ms)
07-06 13:15:16.982: DEBUG/dalvikvm(217): GC freed 732 objects / 64408 bytes in 85ms

我在AndroidManifest.xml中添加了这个权限

我错过了什么或者这里出了什么问题。。请先帮我谢谢-普拉尼亚

我认为PhoneGap的例子遗漏了一些重要的东西。这一行就在这里：

fileSystem.root.getFile("test.txt", null, gotFileEntry, fail);

将仅在文件存在时加载，请尝试按如下方式更新：

fileSystem.root.getFile("test.txt", {create: true}, gotFileEntry, fail);

如果它不存在，它将创建它。

调试是怎么说的？您是否放置权限？@subsider plz查看我编辑的代码。。pragna为什么有super.init（）；第一？您的Web服务器是否支持代理？

fileSystem.root.getFile("test.txt", null, gotFileEntry, fail);

fileSystem.root.getFile("test.txt", {create: true}, gotFileEntry, fail);