在Android中启动Gmail/电子邮件意图，显示电子邮件列表

问题描述：

生成邮件后，我已经实现了Firebase电子邮件链接登录，我想打开手机的电子邮件应用程序，以便用户可以直接打开已发送的邮件.

I've implemented the firebase email link login, after generating the mail I want to open the phone's email app, so the user can directly open the mail, which was sent.

fun startEmailApp(context: Context) {
    val emailPackage = "com.google.android.gm"
    val isGmailInstalled = isAppInstalled(context, emailPackage)

    val intent = Intent(Intent.ACTION_SEND)

    context.startActivity(Intent.createChooser(intent, "choose an email client"))

    if (isGmailInstalled) {
        intent.type = "text/html"
        intent.setPackage(emailPackage)
        context.startActivity(intent)
    } else {
        intent.type = "message/rfc822";
        context.startActivity(Intent.createChooser(intent, "choose an email client"))
    }
}

此实现将打开gmail，但在撰写电子邮件屏幕中.我该如何在收件箱中显示电子邮件列表?

This implementation will open gmail, but in compose email screen. How do I manage to show the list of emails in the inbox instead?

答

我要打开手机的电子邮件应用程序

I want to open the phone's email app

该 emailPackage 值将尝试打开GMail，而不是用户选择的电子邮件应用程序.

That emailPackage value will try to open GMail, not the user's choice of email app.

顺便说一句，请注意，除非您添加< queries> 元素以将查找Gmail的功能列入白名单，否则您的 isAppInstalled()可能会在Android 11上中断.我们现在无法通过 PackageManager 查找其他应用程序.

BTW, note that your isAppInstalled() may break on Android 11, unless you add a <queries> element to whitelist your ability to find Gmail. Our ability to find other apps via PackageManager is now limited.

我该如何在收件箱中显示电子邮件列表?

How do I manage to show the list of emails in the inbox instead?

电子邮件应用程序无需将其作为导出的活动，更不用说具有文档化和受支持的< intent-filter> 的活动了.

There is no requirement for an email app to have that be an exported activity, let alone one that has a documented and supported <intent-filter>.

鉴于您显然只想支持Gmail，您可以尝试打开其 ACTION_MAIN / CATEGORY_LAUNCHER 活动.对于发射器，将会有其中一种，并且可能用户可以轻松地从那里到达其收件箱.

Given that apparently you only want to support Gmail, you could try opening their ACTION_MAIN/CATEGORY_LAUNCHER activity. There is going to be one of those, for launchers, and probably the user can easily get to their inbox from there.

如果您想支持更多的电子邮件应用程序，则可以:

If you wanted to support a wider range of email apps, you could:

摆脱 emailPackage 和使用它的代码
使用 Intent(Intent.ACTION_SENDTO，Uri.parse("mailto:"))作为 MAIN / LAUNCHER 的选择器> Intent ，以显示电子邮件客户端的选择器(如果需要)

Get rid of emailPackage and the code that uses it
Use Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:")) as the selector for a MAIN/LAUNCHER Intent, to bring up a chooser (if needed) of email clients

有关选择器的更多信息，请参见此答案，尽管在这种情况下，他们正在使用它来完善 ACTION_SEND 意图.

See this answer for more on selectors, though in that case they are using it to refine an ACTION_SEND Intent.

在Android中启动Gmail/电子邮件意图，显示电子邮件列表

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