PhoneGap - 无法写入Android文件 [英] PhoneGap - Unable to Write to File for Android
问题描述
我正在使用PhoneGap 1.8版（cordova-1.8.0.js），并尝试为Android制作应用程序。我通过Eclipse调试实际的设备。
I am working with PhoneGap version 1.8 (cordova-1.8.0.js) and am attempting to make an app for Android. I am debugging on an actual device through Eclipse.
我正在尝试向文件写入文本。我正在使用PhoneGap提供的示例API代码
I am trying to write text to a file. I am using the example API code provided by PhoneGap at
http://docs.phonegap.com/en/1.8.0/cordova_file_file.md.html#FileWriter
我已经能够使用我目前的设置创建应用程序，所以我知道它工作得很好，我只是无法写入一个文件。我花了几个小时在这个问题，但不断收到以下错误信息：
I have already been able to create apps with my current set-up so I know it works well, I am just unable to write to a file. I have spent hours on this problem but keep getting the following error message:
E/Web Console(27356): Uncaught ReferenceError: LocalFileSystem is not defined at file:///android_asset/www/debug.js:28
第28行是
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
我正在使用API网站中的确切代码。
I am using the exact code from the API website.
有什么建议可以做错什么？
Any suggestions on what I could be doing wrong?
也许我没有正确导入正确的Java库我的PhoneGap设置？
Maybe I am not importing the proper Java libraries in my PhoneGap setup?
我有以下导入：
import android.os.Bundle;
import org.apache.cordova.*;
import android.view.WindowManager;
import android.view.KeyEvent;
谢谢。
编辑：
我正在使用
$(document).ready(function () {
的
document.addEventListener("deviceready", onDeviceReady, false);
因为它永远不会发生，这是我的确切代码，另外我有
As it would never fire. Here is my exact code, Also I do have the
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
在我的电话沟通项目中有效。
active within my phonegap project.
全部代码：
<!DOCTYPE html>
<html>
<head>
<title>FileWriter Example</title>
<script type="text/javascript" charset="utf-8" src="cordova-1.8.0.js"></script>
<script type="text/javascript" charset="utf-8">
// Wait for Cordova to load
//
document.addEventListener("deviceready", onDeviceReady, false);
// Cordova is ready
//
function onDeviceReady() {
alert("device ready"); // this never gets called
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);
}
function gotFS(fileSystem) {
fileSystem.root.getFile("readme.txt", {create: true, exclusive: false}, gotFileEntry, fail);
}
function gotFileEntry(fileEntry) {
fileEntry.createWriter(gotFileWriter, fail);
}
function gotFileWriter(writer) {
writer.onwriteend = function(evt) {
console.log("contents of file now 'some sample text'");
writer.truncate(11);
writer.onwriteend = function(evt) {
console.log("contents of file now 'some sample'");
writer.seek(4);
writer.write(" different text");
writer.onwriteend = function(evt){
console.log("contents of file now 'some different text'");
}
};
};
writer.write("some sample text");
}
function fail(error) {
console.log(error.code);
}
</script>
</head>
<body>
<h1>Example</h1>
<p>Write File</p>
</body>
</html>
我还在设备准备好的电话中投入了一个警报功能，根本没有被调用。
I also threw in an alert function on the device ready call, it never gets called at all.
关于这段代码不工作的任何想法？
Any thoughts on how this code isn't working?
启动时，我可以得到代码启动的唯一方法是使用
The only way I can ever get code to fire on start up is using
$(document).ready(function () {
});
哪个不好我猜是试图调用文件写入器，因为我不断得到相同的错误信息。
Which isn't good I guess for trying to call the file writter as I keep getting the same error message.
推荐答案
如果 deviceready isn不要开机 - 这是你的手机应用程序如何设置。
The issue isn't with writing a file if deviceready isn't firing -- it's with how your phonegap app is setup.
您必须在主要活动中导入以下内容：
You must import the following in your main activity:
import android.app.Activity; // used to fire deviceready
import android.os.Bundle;
import org.apache.cordova.*;
这篇关于PhoneGap - 无法写入Android文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
