# Error converting bytecode to dex
**URL:** https://discourse.processing.org/t/error-converting-bytecode-to-dex/8507
**Category:** Processing for Android
**Created:** [February 18, 2019, 12:21pm UTC](https://discourse.processing.org/t/error-converting-bytecode-to-dex/8507 "2019-02-18T12:21:05Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@mjmaleki](https://discourse.processing.org/u/mjmaleki)
#### Post date: [February 18, 2019, 12:21pm UTC](https://discourse.processing.org/t/error-converting-bytecode-to-dex/8507/1 "2019-02-18T12:21:05Z")
I just start “android mode” in processing. when i import “g4p\_controls.\*” library this error showed up when trying to compile an app that was previously working in “java mode”:
Error:Error converting bytecode to dex:
Cause: Dex cannot parse version 52 byte code.
This is caused by library dependencies that have been compiled using Java 8 or above.
If you are using the ‘java’ gradle plugin in a library submodule add
targetCompatibility = ‘1.7’
sourceCompatibility = ‘1.7’
to that submodule’s build.gradle file.
i get this error for this library too:
import ddf.minim.\*
i am pleased if you help me.
---
### Author:  [@kfrajer](https://discourse.processing.org/u/kfrajer)
#### Post date: [February 19, 2019, 5:56am UTC](https://discourse.processing.org/t/error-converting-bytecode-to-dex/8507/2 "2019-02-19T05:56:03Z")
I am not sure if G4P works in Android. You can try [controlP5](http://www.sojamo.de/libraries/controlP5/) or use Android native widgets like in [this](https://forum.processing.org/two/discussion/18606/creating-native-android-menus-in-processing-android-mode) example.
Minim doe snot work in Android. You could use the [cassette](https://github.com/shlomihod/cassette) library or [Android MediaPlayer](https://forum.processing.org/two/discussion/19302/using-android-mediaplayer-to-play-sound). [Ketai](http://ketai.org/) is also another library that you should explore as it provides functions specific for Processing Android.
Kf