Javamail使用wifi连接发送电子邮件，但不支持数据移动

Question

I'm new in android. I'm learning about javamail to create app that can send email notification. I follow this tutorial https://www.simplifiedcoding.net/android-email-app-using-javamail-api-in-android-studio/

It's working well in emulator android. I can receive email. Then I tried to install my app in my android device with Wifi connection, it's working well. But when I use Data Mobile Connection (not Wifi) email not sent. Can you tell me why?

Thanks for advance.

Answer 1

solution from @Agung from the comments

add this code

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

in AndroidManifest.xml file...