PhoneGap - 无法写入文件的Android [英] PhoneGap - Unable to Write to File for Android
问题描述
我使用PhoneGap 1.8版（cordova-1.8.0.js），并试图为Android制作应用程式。我通过Eclipse在实际设备上进行调试。
我正在尝试将文本写入文件。我使用PhoneGap提供的示例API代码
http://docs.phonegap.com/en/1.8.0/cordova_file_file.md.html#FileWriter
我有已经能够创建应用程序与我当前的设置，所以我知道它的工作很好，我只是无法写入文件。我花了几个小时这个问题，但不断得到以下错误信息：
E / Web控制台（27356）：未捕获ReferenceError： LocalFileSystem未在file：///android_asset/www/debug.js中定义：28
第28行
window.requestFileSystem（LocalFileSystem.PERSISTENT，0，gotFS，fail）;
我使用API网站的确切代码。
对我可能做错了什么建议？
也许我没有导入正确的Java库我的PhoneGap设置？
我已导入以下内容：
import android.os.Bundle;
import org.apache.cordova。*;
import android.view.WindowManager;
import android.view.KeyEvent;
谢谢。
编辑：
我使用
$（document）.ready（function（）{
document.addEventListener（deviceready，onDeviceReady，false）;
因为它永远不会触发，这是我的确切代码，我也有
< uses-permission android：name =android.permission.WRITE_EXTERNAL_STORAGE/>
在我的phonegap项目中有效。
完整代码：
code><！DOCTYPE html>
< html>
< head>
< title> FileWriter示例< / title>
; script type =text / javascriptcharset =utf-8src =cordova-1.8.0.js>< / script>
< script type =text / javascriptcharset = utf-8>
//等待Cordova加载
//
document.addEventListener（deviceready，onDeviceReady，false）;
// Cordova准备就绪
//
function onDeviceReady（）{
alert（device ready）; // this never get 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）;
}
函数gotFileWriter（writer）{
writer.onwriteend = function（evt）{
console.log（file of file now'some sample text' ）;
writer.truncate（11）;
writer.onwriteend = function（evt）{
console.log（file of'now'some sample'）;
writer.seek（4）;
writer.write（different text）;
writer.onwriteend = function（evt）{
console.log（file of file now'some text text'）;
}
};
};
writer.write（some sample text）;
}
function fail（error）{
console.log（error.code）;
}
< / script>
< / head>
< body>
< h1>示例< / h1>
< p>写入文件< / p>
< / body>
< / html>
我也在设备就绪调用上抛出一个警告函数，它从来不会被调用。
有关此代码无效的任何想法吗？
我可以在启动时获取代码的唯一方法是使用
$（document）.ready（function（）{
}）;
这是不好我想试图调用文件写程序，信息。
解决方案如果
devicereadyisn
您必须在主要活动中导入以下内容：
import android.app.Activity; //用于触发deviceready
import android.os.Bundle;
import org.apache.cordova。*;
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.
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
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:28line 28 being
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);I am using the exact code from the API website.
Any suggestions on what I could be doing wrong?
Maybe I am not importing the proper Java libraries in my PhoneGap setup?
I have the following imported:
import android.os.Bundle; import org.apache.cordova.*; import android.view.WindowManager; import android.view.KeyEvent;Thank you.
EDIT:
I was using
$(document).ready(function () {Instead of the
document.addEventListener("deviceready", onDeviceReady, false);As it would never fire. Here is my exact code, Also I do have the
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />active within my phonegap project.
full code:
<!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>I also threw in an alert function on the device ready call, it never gets called at all.
Any thoughts on how this code isn't working?
The only way I can ever get code to fire on start up is using
$(document).ready(function () { });Which isn't good I guess for trying to call the file writter as I keep getting the same error message.
解决方案The issue isn't with writing a file if
devicereadyisn't firing -- it's with how your phonegap app is setup.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.*;
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