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Use portforwarding to bypass android 9 pie https limitation

There is a closed issue on joplin github page about this problem.

HTTP is not permitted on Android 9

In this issue laurent22 say “We already set usesCleartextTraffic but looks like it makes no difference.” but it is not true, usesCleartextTraffic is working.

I checked network_security_config.xml in apk, there are only few domains allowed such as:

localhost
10.0.1.1
10.0.2.2
10.0.3.2

I have tried to add new line to it with apktool, but i can not have the modified apk installed

Then I installed portforwarder[https://play.google.com/store/apps/details?id=com.elixsr.portforwarder&hl=en_US], and setup joplin to use localhost instead of the server real ip, it works.

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