Question

有没有办法以编程方式打开电子邮件客户端，而无需强制发送邮件？我只是希望应用程序允许用户打开他的电子邮件客户端以进行电子邮件检查：）

    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("message/rfc822");
    startActivity(Intent.createChooser(intent, ""));

此代码有效但会强制用户发送新邮件。

Answer 1

    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_APP_EMAIL);
    startActivity(intent);  
    startActivity(Intent.createChooser(intent, getString(R.string.ChoseEmailClient)));

那种方式有效。但它为我打开了Gmail，即使我有其他电子邮件客户端

Answer 2

此代码将显示一个包含电子邮件客户端列表的对话框。单击一个将启动应用程序：

try {
    List<String> emailClientNames = new ArrayList<String>();
    final List<String> emailClientPackageNames = new ArrayList<String>();
    // finding list of email clients that support send email
    Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
        "mailto", "abc@gmail.com", null));
    PackageManager pkgManager = AppController.getContext().getPackageManager();
    List<ResolveInfo> packages = pkgManager.queryIntentActivities(intent, 0);
    if (!packages.isEmpty()) {
        for (ResolveInfo resolveInfo : packages) {
            // finding the package name
            String packageName = resolveInfo.activityInfo.packageName;
            emailClientNames.add(resolveInfo.loadLabel(getPackageManager()).toString());
            emailClientPackageNames.add(packageName);
        }
        // a selection dialog  for the email clients
        AlertDialog.Builder builder = new AlertDialog.Builder(MyActivity.this);
        builder.setTitle("Select email client");
        builder.setItems(emailClientNames.toArray(new String[]{}), new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            // on click we launch the right package
            Intent intent = getPackageManager().getLaunchIntentForPackage(emailClientPackageNames.get(which));
                startActivity(intent);
            }
        });
        AlertDialog dialog = builder.create();
        dialog.show();
    }
} catch (ActivityNotFoundException e) {
    // Show error message
}

Answer 3

我认为你应该将Intent.ACTION_SEND替换为Intent.ACTION_VIEW，我相信这会有效，因为这会提示支持MIME类型"message/rfc822"的应用列表，所以它会在您的设备中包含您的默认电子邮件客户端，而不是gmail应用程序
这个代码怎么样：

final Intent emailLauncher = new Intent(Intent.ACTION_VIEW);
emailLauncher.setType("message/rfc822");
try{
       startActivity(emailLauncher);
}catch(ActivityNotFoundException e){

}

Answer 4

在Kotlin中，但是此版本创建了一个选择器，供用户选择要使用的电子邮件应用程序。除了使用LabeledIntent创建实际的选择器外，您基本上可以执行Oved在其答案中的工作。

fun emailAppIntent(): Intent? {
    val emailIntent = Intent(Intent.ACTION_VIEW, Uri.parse("mailto:"))
    val packageManager = appLaunchContext.packageManager

    val activitiesHandlingEmails = packageManager.queryIntentActivities(emailIntent, 0)
    if (activitiesHandlingEmails.isNotEmpty()) {
        // use the first email package to create the chooserIntent
        val firstEmailPackageName = activitiesHandlingEmails.first().activityInfo.packageName
        val firstEmailInboxIntent = packageManager.getLaunchIntentForPackage(firstEmailPackageName)
        val emailAppChooserIntent = Intent.createChooser(firstEmailInboxIntent, "")

        // created UI for other email packages and add them to the chooser
        val emailInboxIntents = mutableListOf<LabeledIntent>()
        for (i in 1 until activitiesHandlingEmails.size) {
            val activityHandlingEmail = activitiesHandlingEmails[i]
            val packageName = activityHandlingEmail.activityInfo.packageName
            val intent = packageManager.getLaunchIntentForPackage(packageName)
            emailInboxIntents.add(
                LabeledIntent(
                    intent,
                    packageName,
                    activityHandlingEmail.loadLabel(packageManager),
                    activityHandlingEmail.icon
                )
            )
        }
        val extraEmailInboxIntents = emailInboxIntents.toTypedArray()
        return emailAppChooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, extraEmailInboxIntents)
    } else {
        return null
    }
}

..然后再用

调用

val emailChooserIntent = emailAppIntent()

if (emailChooserIntent != null) {
    startActivity(emailAppIntent())
}

或根据需要处理null。

Answer 5

Kotlin 中更现代的解决方案

    fun tryVerifyMail() {
        try {
            val intents: List<Intent> = (packageManager.queryIntentActivities(Intent(
                Intent.ACTION_SENDTO, Uri.fromParts(
                    "mailto", "lowhillgamesoy@gmail.com", null
                )
            ), 0) + packageManager.queryIntentActivities(Intent(Intent.ACTION_VIEW).also {
                it.type = "message/rfc822"
            }, 0)).mapNotNull {
                it.activityInfo.packageName
            }.toSet().mapNotNull {
                packageManager.getLaunchIntentForPackage(it)
            }

            if(intents.size > 0) {
                startActivityForResult(Intent.createChooser(intents.first(), getString(R.string.verify_mail)).also {
                    if(intents.size > 1) {
                        it.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents.subList(1, intents.size - 1).toTypedArray())
                    }
                }, OPEN_MAIL_REQUEST_CODE)
            } else {
                Toast.makeText(this, "Verify your e-mail by clicking the link in your e-mail inbox.", Toast.LENGTH_LONG).show()
            }


        } catch (e: ActivityNotFoundException) {
            // Show error message
            e.printStackTrace()
        }
    }

这也会选择仅支持 ACTION_SEND 和 ACTION_VIEW 的邮件客户端并删除重复项。

通过Intent打开电子邮件客户端（但不发送消息）

5 个答案: