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();
    }
}

这一切似乎都正常.它打开电子邮件客户端,主题,正文和附件都可见

并发送就好了,表明有附件

但是当我打开gmail时,没有显示附件

当我查看电子邮件时,同样的故事

从“已发送”文件夹中查看电话中的电子邮件,也显示没有附件

该代码是从SO上多个不同帖子中复制并粘贴的,看来他们没有任何问题.文件要去哪里？它被gmail阻止了吗？还是根本不发送？该文件不存在吗？

注意：我确实有< uses-permission android：name =“ android.permission.WRITE_EXTERNAL_STORAGE” />在清单中设置.

提前致谢.

解决方法:

问题出在文件路径上.进行了以下更改：

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

然后实际发送电子邮件：

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();
    }
}