Android，.txt电子邮件附件不通过意图发送

Question

我正在测试创建.txt文件，然后通过意图将其作为电子邮件附件发送。

创建.txt文件

    try {
        String fileName = "testFileName.txt";
        File root = new File(Environment.getExternalStorageDirectory(), "testDir");
        if (!root.exists()) {
            root.mkdirs();
        }
        File gpxfile = new File(root, fileName);
        FileWriter writer = new FileWriter(gpxfile);
        writer.append("Testing email txt attachment.");
        writer.flush();
        writer.close();
        sendEmail(gpxfile.getAbsolutePath());
    } catch (IOException e) {
        e.printStackTrace();
    }

发送电子邮件

protected void sendEmail(String fileName){
    Intent i = new Intent(Intent.ACTION_SEND);
    i.setType("message/rfc822");
    i.putExtra(Intent.EXTRA_SUBJECT, "Test subject");
    i.putExtra(Intent.EXTRA_TEXT, "This is the body of the email");
    i.putExtra(Intent.EXTRA_STREAM, Uri.parse(fileName));
    try {
        startActivity(Intent.createChooser(i, "Send mail..."));
    } catch (android.content.ActivityNotFoundException ex) {
        Toast.makeText(this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
    }
}

这一切似乎都很好。它打开了电子邮件客户端，主题，正文和附件都可见

发送得很好，表明有附件

但是当我打开gmail时，没有显示附件

查看电子邮件时的情况相同

在“已发送”文件夹中查看手机上的电子邮件，也显示无附件

代码是SO上的多个不同帖子的复制和粘贴，看起来他们没有任何问题。文件在哪里？它被gmail阻止了吗？或者根本不发送？该文件不存在吗？

注意：我在清单中设置了<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />。

提前致谢。

Answer 1

The problem was with the file path. Made the following changes:

sendEmail(gpxfile); // This is the file itself, not the file path

Then actually sending the email:

protected void sendEmail(File file){
    Uri path = Uri.fromFile(file); // This guy gets the job done!

    Intent i = new Intent(Intent.ACTION_SEND);
    i.setType("message/rfc822");
    i.putExtra(Intent.EXTRA_SUBJECT, "Test subject");
    i.putExtra(Intent.EXTRA_TEXT, "This is the body of the email");
    i.putExtra(Intent.EXTRA_STREAM, path); // Include the path
    try {
        startActivity(Intent.createChooser(i, "Send mail..."));
    } catch (android.content.ActivityNotFoundException ex) {
        Toast.makeText(this, "There are no email clients installed.", Toast.LENGTH_SHORT).show();
    }
}