ChaJH 1 Posted January 11 The image above is Android Studio using mraa-2.2.0.aar. I need Uart control Tinker Board 2S. However, when you build an app through Tinkerboard using the mraa library, the app dies with the following error. [java.lang.UnsatisfiedLinkError: dlopen failed: library "libmraajava.so" not found] The error is suspect. I can't find libmraajava.so . However, the mraa-2.2.0.aar file does not contain libmraajava.so in jni. https://github.com/TinkerBoard/TinkerBoard/wiki/Developer-Guide#mraa-library-for-android It doesn't work with what I received from the official address above, so what's the problem? Code for the problem mraaJNI.class found by debugging. Additionally, when executing code to call GPIO, you get a [ libmraajava.so not found ] error as you go to the static try {} catch {} just above import mraa.Gpio import mraa.Dir var gpio = Gpio(1) // error code start... Share this post Link to post Share on other sites
tooz 52 Posted January 11 hello @ChaJH, what's the image version you're using? Share this post Link to post Share on other sites
ChaJH 1 Posted January 11 (edited) @tooz Android Studio >> Android-studio-2023.1.1.27-window.exe My Project build.gradle > 이거 물어보는 게 맞나요? Edited January 11 by ChaJH Share this post Link to post Share on other sites
ChaJH 1 Posted January 11 Members 0 1 post Report post Android Studio >> android-studio-2023.1.1.27-windows.exe My Project build.gradle > Is it right to ask this? Share this post Link to post Share on other sites
tooz 52 Posted January 11 hello @ChaJH, 1. i mean the tinker board android os version you're using (for example android 11 v.2.0.8), did you get the sources from here? TinkerBoard-Android/rockchip-android-manifest (github.com) 2. the sample codes from this .zip does include libmraajava.so, would you like to give it a try? The Sample codes of Mraa API for Tinker Board 2: Android-MraaDemo_tinkerboard2.zip Share this post Link to post Share on other sites
ChaJH 1 Posted January 11 4 minutes ago, tooz said: hello @ChaJH, 1. i mean the tinker board android os version you're using (for example android 11 v.2.0.8), did you get the sources from here? TinkerBoard-Android/rockchip-android-manifest (github.com) 2. the sample codes from this .zip does include libmraajava.so, would you like to give it a try? The Sample codes of Mraa API for Tinker Board 2: Android-MraaDemo_tinkerboard2.zip My Tinker Board Android OS : Android 12 V3.0.2 (This is the latest version.) https://tinker-board.asus.com/download-list.html?product=tinker-board-2s @tooz, As you said, can I get it in that version and proceed with it? Like the image above. Can I download and use Tinker Board OS from the official site (https://tinker-board.asus.com/download-list.html?product=tinker-board-2s) )? Or, should I download it from the giturl you told me? Share this post Link to post Share on other sites
ChaJH 1 Posted January 11 2 hours ago, tooz said: hello @ChaJH, 1. i mean the tinker board android os version you're using (for example android 11 v.2.0.8), did you get the sources from here? TinkerBoard-Android/rockchip-android-manifest (github.com) 2. the sample codes from this .zip does include libmraajava.so, would you like to give it a try? The Sample codes of Mraa API for Tinker Board 2: Android-MraaDemo_tinkerboard2.zip thank you sir, @tooz! mraa works normally. Thank you very much. 1 Share this post Link to post Share on other sites
tooz 52 Posted January 11 hello @ChaJH, how did you solve the problem? did you redownload the source codes, or did you use the sample codes of mraa api for tinker board 2? Share this post Link to post Share on other sites
ChaJH 1 Posted January 12 17 hours ago, tooz said: hello @ChaJH, 당신은 그 문제를 어떻게 해결했습니까? 소스 코드를 다시 다운로드하셨나요, 아니면 mraa api의 샘플 코드를 팅커보드 2에 사용했나요? Hello @tooz I downloaded the OS image version you told me. So it becomes a gpio control with mraa. Share this post Link to post Share on other sites
tooz 52 Posted January 12 hello @ChaJH, got it, thanks for the update. the mraa library will be added in the next android 12 os release too Share this post Link to post Share on other sites
