这就是我使用的方法，对我来说很有效:

//variables
String subject = "Whatever subject you want";
String body = "Whatever text you want to put in the body";
String intentType = "text/html";
String mailToParse = "mailto:";

//start Intent
Intent variableName = new Intent(Intent.ACTION_SENDTO);
variableName.setType(intentType);
variableName.setData(Uri.parse(mailToParse));
variableName.putExtra(Intent.EXTRA_SUBJECT, subject);
variableName.putExtra(Intent.EXTRA_TEXT, body);

startActivity(variableName);

这也可以让用户选择他们喜欢的电子邮件应用程序。唯一不允许你做的是设置收件人的电子邮件地址。

主要有三种方法:

String email = /* Your email address here */
String subject = /* Your subject here */
String body = /* Your body here */
String chooserTitle = /* Your chooser title here */

1. 自定义Uri:

Uri uri = Uri.parse("mailto:" + email)
    .buildUpon()
    .appendQueryParameter("subject", subject)
    .appendQueryParameter("body", body)
    .build();

Intent emailIntent = new Intent(Intent.ACTION_SENDTO, uri);
startActivity(Intent.createChooser(emailIntent, chooserTitle));

2. 使用Intent附加:

Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:" + email));
emailIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
emailIntent.putExtra(Intent.EXTRA_TEXT, body);
//emailIntent.putExtra(Intent.EXTRA_HTML_TEXT, body); //If you are using HTML in your body text

startActivity(Intent.createChooser(emailIntent, "Chooser Title"));

3.支持库ShareCompat:

Activity activity = /* Your activity here */

ShareCompat.IntentBuilder.from(activity)
    .setType("message/rfc822")
    .addEmailTo(email)
    .setSubject(subject)
    .setText(body)
    //.setHtmlText(body) //If you are using HTML in your body text
    .setChooserTitle(chooserTitle)
    .startChooser();

编辑:不再工作与Gmail的新版本

这是我当时发现的唯一方法，让它与任何角色一起工作。

doreamon的答案是正确的，因为它适用于Gmail新版本的所有角色。

旧的回答:

这是我的。它似乎适用于所有Android版本，支持主题和消息体，并支持完整的utf-8字符:

public static void email(Context context, String to, String subject, String body) {
    StringBuilder builder = new StringBuilder("mailto:" + Uri.encode(to));
    if (subject != null) {
        builder.append("?subject=" + Uri.encode(Uri.encode(subject)));
        if (body != null) {
            builder.append("&body=" + Uri.encode(Uri.encode(body)));
        }
    }
    String uri = builder.toString();
    Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse(uri));
    context.startActivity(intent);
}

在Kotlin如果有人在看的话

val emailArrray:Array<String> = arrayOf("travelagentsupport@kkk.com")
val intent = Intent(Intent.ACTION_SENDTO)
intent.data = Uri.parse("mailto:") // only email apps should handle this
intent.putExtra(Intent.EXTRA_EMAIL, emailArrray)
intent.putExtra(Intent.EXTRA_SUBJECT, "Inquire about travel agent")
if (intent.resolveActivity(getPackageManager()) != null) {
    startActivity(intent);
}

与Kotlin，工作与Gmail:

val i = Intent(Intent.ACTION_SENDTO).apply {
    type = "text/html"
    data = Uri.parse("mailto:")
    putExtra(Intent.EXTRA_EMAIL, arrayOf(email))
    putExtra(Intent.EXTRA_SUBJECT, subject)
    putExtra(Intent.EXTRA_TITLE, subject)
}
if (packageManager != null && i.resolveActivity(packageManager) != null) {
    startActivity(i)
}

如果有人找到一个解决方案来显示消息…

ACTION_VIEW也有一个简单的解决方案:

  Intent intent = new Intent(Intent.ACTION_VIEW);
        Uri data = Uri.parse("mailto:customer@something.com?subject=Feedback");
        intent.setData(data);
        startActivity(intent);