用这个:

boolean success = EmailIntentBuilder.from(activity)
        .to("support@example.org")
        .cc("developer@example.org")
        .subject("Error report")
        .body(buildErrorReport())
        .start();

使用build gradle:

compile 'de.cketti.mailto:email-intent-builder:1.0.0'

这些答案大多只适用于不发送附件的简单情况。在我的情况下，我有时需要发送附件(ACTION_SEND)或两个附件(ACTION_SEND_MULTIPLE)。

所以我从这条线索中选择了最好的方法并将它们结合起来。它使用支持库的ShareCompat。但是我只展示了匹配ACTION_SENDTO和"mailto:" uri的应用程序。这样我得到的只有附件支持的电子邮件应用程序列表:

fun Activity.sendEmail(recipients: List<String>, subject: String, file: Uri, text: String? = null, secondFile: Uri? = null) {
    val originalIntent = createEmailShareIntent(recipients, subject, file, text, secondFile)
    val emailFilterIntent = Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:"))
    val originalIntentResults = packageManager.queryIntentActivities(originalIntent, 0)
    val emailFilterIntentResults = packageManager.queryIntentActivities(emailFilterIntent, 0)
    val targetedIntents = originalIntentResults
            .filter { originalResult -> emailFilterIntentResults.any { originalResult.activityInfo.packageName == it.activityInfo.packageName } }
            .map {
                createEmailShareIntent(recipients, subject, file, text, secondFile).apply { `package` = it.activityInfo.packageName }
            }
            .toMutableList()
    val finalIntent = Intent.createChooser(targetedIntents.removeAt(0), R.string.choose_email_app.toText())
    finalIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, targetedIntents.toTypedArray())
    startActivity(finalIntent)
}

private fun Activity.createEmailShareIntent(recipients: List<String>, subject: String, file: Uri, text: String? = null, secondFile: Uri? = null): Intent {
    val builder = ShareCompat.IntentBuilder.from(this)
            .setType("message/rfc822")
            .setEmailTo(recipients.toTypedArray())
            .setStream(file)
            .setSubject(subject)
    if (secondFile != null) {
        builder.addStream(secondFile)
    }
    if (text != null) {
        builder.setText(text)
    }
    return builder.intent
}

终于想出了最好的办法

String to = "test@gmail.com";
String subject= "Hi I am subject";
String body="Hi I am test body";
String mailTo = "mailto:" + to +
        "?&subject=" + Uri.encode(subject) +
        "&body=" + Uri.encode(body);
Intent emailIntent = new Intent(Intent.ACTION_VIEW);
emailIntent.setData(Uri.parse(mailTo));
startActivity(emailIntent);

这是一个迟来的答案，尽管我想出了一个可以帮助其他人的解决方案:

Java版本

Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
emailIntent.setData(Uri.parse("mailto:abc@xyz.com"));
startActivity(Intent.createChooser(emailIntent, "Send feedback"));

芬兰湾的科特林版本

val emailIntent = Intent(Intent.ACTION_SENDTO).apply { 
    data = Uri.parse("mailto:abc@xyz.com")
}
startActivity(Intent.createChooser(emailIntent, "Send feedback"))

这是我的输出(只有Gmail +收件箱建议):

我从Android开发者网站上得到了这个解决方案。

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…

请使用以下代码:

try {
    String uriText =
            "mailto:emailid" +
                    "?subject=" + Uri.encode("Feedback for app") +
                    "&body=" + Uri.encode(deviceInfo);
    Uri uri = Uri.parse(uriText);
    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
    emailIntent.setData(uri);
    startActivity(Intent.createChooser(emailIntent, "Send email using..."));
} catch (android.content.ActivityNotFoundException ex) {
    Toast.makeText(ContactUsActivity.this, "No email clients installed.", Toast.LENGTH_SHORT).show();
}