安卓发送带有字符串附件的邮件

我有一个HTML字符串，我想把它作为一个文件附加到邮件中。我可以将此字符串保存到文件并附加它，但我想在不将其保存到文件的情况下执行此操作。我认为这应该是可能的，但我不知道该怎么做。这是我的代码：

String html = "<html><body><b><bold</b><u>underline</u></body></html>";
Intent intent = new Intent(Intent.ACTION_SEND, Uri.parse("mailto:"));
intent.setType("text/html");
intent.putExtra(Intent.EXTRA_SUBJECT, "Subject");
intent.putExtra(Intent.EXTRA_TEXT, Html.fromHtml(html));
// this is where I want to create attachment
intent.putExtra(Intent.EXTRA_STREAM, Html.fromHtml(html));
startActivity(Intent.createChooser(intent, "Send Email"));

如何将字符串作为文件附加到邮件中？

此代码可避免添加清单使用权限从外部 SD 卡读取。它会在应用专用目录的文件目录中创建一个临时文件，然后使用字符串的内容创建文件，并允许读取权限，以便可以访问它。

String phoneDesc = "content string to send as attachment";
FileOutputStream fos = null;
try {
        fos = openFileOutput("tempFile", Context.MODE_WORLD_READABLE);
        fos.write(phoneDesc.getBytes(),0,phoneDesc.getBytes().length);
        fos.flush();
        fos.close();
} catch (IOException ioe) {
    ioe.printStackTrace();
}
finally {
    if (fos != null)try {fos.close();} catch (IOException ie) {ie.printStackTrace();}
}
File tempFBDataFile  = new File(getFilesDir(),"tempFile");
Intent emailClient = new Intent(Intent.ACTION_SENDTO, Uri.parse("someone@somewhere.com"));
emailClient.putExtra(Intent.EXTRA_SUBJECT, "Sample Subject";
emailClient.putExtra(Intent.EXTRA_TEXT, "Sample mail body content");
emailClient.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(tempFBDataFile));//attachment
Intent emailChooser = Intent.createChooser(emailClient, "select email client");
startActivity(emailChooser);

只要您不再需要该文件，就应该调用它。

File tempData = new File(getFilesDir(),"tempFile");
if (tempData.exists()) {
    tempData.delete();
}

String pathname= Environment.getExternalStorageDirectory().getAbsolutePath();
String filename="/MyFiles/mysdfile.txt";
File file=new File(pathname, filename);
Intent i = new Intent(Intent.ACTION_SEND);
i.putExtra(Intent.EXTRA_SUBJECT, "Title");
i.putExtra(Intent.EXTRA_TEXT, "Content");
i.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
i.setType("text/plain");
startActivity(Intent.createChooser(i, "Your email id"));

Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
    emailIntent.setType("png/image");
    emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[] {
                    "mail--id" });
    emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
    emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, message);
    Uri uri = Uri.fromFile(new File(Environment
                    .getExternalStorageDirectory(), "/saved_images/MyImage.png"));
    emailIntent.putExtra(Intent.EXTRA_STREAM, uri);
    emailIntent.setType("text/plain");
    startActivity(emailIntent);

并且不要忘记在清单文件中添加以下权限。

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" /

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