getAccountsByType(“com.google”)无法列出我在MinSDK版本21和TargetSDK版本27上的google帐户

changes in 8.0 ,帐户不能仅通过 GET_ACCOUNTS 许可。您还需要要求用户使用 AccountManager.newChooseAccountIntent

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    if(checkSelfPermission(Manifest.permission.GET_ACCOUNTS) == PackageManager.PERMISSION_GRANTED) {
        val intent = AccountManager.newChooseAccountIntent(null, null, arrayOf("com.google"), null, null, null, null)
        startActivityForResult(intent, 42)
    }
}

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    if (requestCode == 42) 
        val accountManager = AccountManager.get(this)
        val accounts = accountManager.getAccountsByType("com.google")
        accounts.forEach {
            Log.v(localClassName, it.toString())
        }
    }
}

如以下文件所述: :

因此,您只需选择一次帐户,然后系统应记住此选项,以便后续调用 AccountManager.getAccountsByType