问题描述
在我的Android应用程序，我应该从用户简单的文本文件存储数据，我在原目录中创建。在此之后，我试图用简单的code从谷歌的例子写在追加方式文件：
In my Android app I should store the data from user in simple text-file, that I created in the raw directory. After this, I'm trying to write file in APPEND MODE by using simple code from the Google's examples:
try
{
FileOutputStream fos = openFileOutput(FILE_NAME, Context.MODE_APPEND);
fos.write((nameArticle+"|"+indexArticle).getBytes());
fos.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
但没有任何反应。没有例外，但我可以看到什么我的 FILE_NAME ，除了单独的记录，这是由我添加
But nothing happens: no exceptions, but I can see nothing in my FILE_NAME, besides the single record, which was added by me.
我是什么做错了吗？是否有可能在共同谱写模拟器文件？
What am I doing wrong ? Is it possible at common to write to file in emulator ?
推荐答案
openFileOutput 将只允许你打开这个语境下的应用程序包写入相关的私人文件。我不知道该文件你要写信给所在。我的意思是完整路径。你可以用code下面写到位于任何地方的文件（只要你有烫发）。这个例子是使用外部存储，但你应该能够修改它的任何地方写：
openFileOutput will only allow you to open a private file associated with this Context's application package for writing. I'm not sure where the file you're trying to write to is located. I mean full path. You can use the code below to write to a file located anywhere (as long as you have perms). The example is using the external storage, but you should be able to modify it to write anywhere:
public Uri writeToExternalStoragePublic() {
final String filename = mToolbar.GetTitle() + ".html";
final String packageName = this.getPackageName();
final String folderpath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/" + packageName + "/files/";
File folder = new File(folderpath);
File file = null;
FileOutputStream fOut = null;
try {
try {
if (folder != null) {
boolean exists = folder.exists();
if (!exists)
folder.mkdirs();
file = new File(folder.toString(), filename);
if (file != null) {
fOut = new FileOutputStream(file, false);
if (fOut != null) {
fOut.write(mCurrentReportHtml.getBytes());
}
}
}
} catch (IOException e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
return Uri.fromFile(file);
} finally {
if (fOut != null) {
try {
fOut.flush();
fOut.close();
} catch (IOException e) {
Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
}
在你给的例子，试图抓住I0Exception`，我有一种感觉你没有，你试图写入权限。
In the example you have given, try catching 'I0Exception`, I have a feeling you do not have permission where you are trying to write.
有一个快乐的新年。
这篇关于写入文本文件中的＆QUOT;追加模式＆QUOT;在模拟器模式，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！