new Thread and React Native. Add Mapsforge library

Question

Try to add library mapsforge as module to React Native for generating bmp tiles. But have problem with render of map. Render tiles runing from new Thread If i understand correct, this shouldn't work since RN blocked all threads for self work?

Library is very useful, but modules not exist by mapforge in free access =)

Do variants exist for realisations of render in other thread?

Ty for anwser

org/mapsforge/map/layer/renderer/TileRendererLayer.java file TileRendererLayer.java

first step

second step

public void setXmlRenderTheme(XmlRenderTheme xmlRenderTheme) {
        this.xmlRenderTheme = xmlRenderTheme;
        compileRenderTheme();
    }

    protected void compileRenderTheme() {
        this.renderThemeFuture = new RenderThemeFuture(this.graphicFactory, this.xmlRenderTheme, this.displayModel);
        new Thread(this.renderThemeFuture).start();
    }

For test i created additional activity and try run render. But doesnt work too Reading doc by ReactNative about thread and to clarify about info. Next step is to check status of thread after running application and search info about running map in other Activity with render in another thread or as service. Mb idea is bad.