发送电子邮件

// Compile a Uri with the 'mailto' schema
Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
        "mailto","johndoe@example.com", null));
// Subject
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Hello World!");
// Body of email
emailIntent.putExtra(Intent.EXTRA_TEXT, "Hi! I am sending you a test email.");
// File attachment
emailIntent.putExtra(Intent.EXTRA_STREAM, attachedFileUri);

// Check if the device has an email client
if (emailIntent.resolveActivity(getPackageManager()) != null) {
     // Prompt the user to select a mail app
     startActivity(Intent.createChooser(emailIntent,"Choose your mail application"));
} else {
    // Inform the user that no email clients are installed or provide an alternative
}

这将在用户选择的邮件应用程序中预先填写电子邮件。

如果你需要添加附件，可以使用 Intent.ACTION_SEND 而不是 Intent.ACTION_SENDTO。对于多个附件，你可以使用 ACTION_SEND_MULTIPLE

提醒一句：不是每一个设备具有 ACTION_SENDTO 供应商，并要求 startActivity() 而不检查 resolveActivity() 第一可能抛出 ActivityNotFoundException。