试图发送一个创建的文本文件作为电子邮件附件 - 从默认文件夹 [英] Trying to send a created text file as an email attachment - from a default folder
问题描述
我想一些简单的创建一个文本文件，然后把它作为附件。虽然如果我使用的SD卡能正常工作，我不知道在哪里把它的标准数据文件夹，让我的应用程序的实际工作为大家没有SD卡（文件是有点不可见）
I am trying something simple as creating a text file and then send it as attachment. While it works fine if I use the sdcard I don't know where to put it in the "standard data folder" so my app works actually for everyone without sdcard (and the file is somewhat invisible)
虽然这code的作品，我把这些问题在＆lt; - * 注释
While this code works, I put the questions in the <- * comment.
在创建文件：
String FILENAME = "myFile.txt";
String string = "just something";
// create a File object for the parent directory
File myDirectory = new File("/sdcard/myDir/"); // ******** <- what do I have to put HERE for standard data folder????
// have the object build the directory structure, if needed.
myDirectory.mkdirs();
// create a File object for the output file
File outputFile = new File(myDirectory, FILENAME);
// now attach the OutputStream to the file object, instead of a String representation
FileOutputStream fos = null;
//always have to put try/catch around the code - why? I don't know
try {
fos = new FileOutputStream(outputFile);
} catch (FileNotFoundException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
//again have to put try/catch around it - otherwise compiler complains
try {
fos.write(string.getBytes());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
当发送文件：
public void doSendFile() {
String fileName = "/sdcard/myDir/myFile.txt"; // ******** <- what do I have to put HERE for standard data folder????
Intent i = new Intent(Intent.ACTION_SEND);
try {
mainDataManager.logFileHandle.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
i.setType("text/plain");
i.putExtra(Intent.EXTRA_EMAIL, new String[] { "to@someone.com" });
i.putExtra(Intent.EXTRA_SUBJECT, "subject");
i.putExtra(Intent.EXTRA_TEXT, "text");
Log.i(getClass().getSimpleName(),
"logFile=" + Uri.parse("file://" + fileName));
i.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + fileName));
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(getBaseContext(),
"There are no email clients installed.", Toast.LENGTH_SHORT)
.show();
}
}
我发现该文件似乎是存放在数据/数据/ com.xxx.xxxx /数据库/在创建MYFILE.TXT。
但是，当我用这个在附件中，什么也没有送。
I found that the file seems to be stored at "data/data/com.xxx.xxxx/databases/myFile.txt on creation. But when I used this in the attachment, nothing was sent.
因此，基本上所有我需要的是知道如何存储在本地内存中的文件，然后从那里发出。因为不是每个人都可能有外部存储SD卡 - 我假设
So basically all I need is to know how to store a file in local memory and then send it from there. Since not everyone might have an external memory sd card - I assume.
谢谢！
推荐答案
这是监守SD卡不被保护，所以你可以像你一样的非标准Java的方式写入到那里。
This is becuase the SD card is not protected, so you can write to there in the standart java way as you did.
为了给你写信不能使用这个Android的文件系统，因为每个文件使用一个应用程序键，以避免其他应用程序使用它的保护。
In order to write to the Android file system you cannot use this, since every file is protected using an App key to avoid other apps to use it.
您使用768,16 openFileOutput（）请参见本教程的详细信息：
You shoud use openFileOutput() see this tutorial for more info:
http://www.anddev.org/working_with_files-t115.html
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