I tried to test offline routing with PBF file in android studio. I read this link https://osm2po.de/ and tried this code:

public class Main implements Configurer {
    final static String LOGLEVEL = "debug";
    
    public void configure(Props props) {
        props.setProperty("log.0.level", LOGLEVEL);
        props.setProperty("postp.0.class", PgRoutingWriter.class.getName());
    }
    
    public static void main(String[] args) {

        // Lets drop the args above and simulate a commandline call with hard coded ones
        args = new String[] {
                "http://download.geofabrik.de/europe/germany/hamburg-latest.osm.pbf",
                "tileSize=x", "prefix=hh", "cmd=cg", "workDir=work",
                };

        // This Main implements Configurer, which let's us overwrite other stuff via code
        // see configure(Props) above
        args = ArrayUtils.stringArrayConcat(
                args, new String[] {"configurer.class=" + Main.class.getName()});
        
        // The magic begins
        de.cm.osm2po.Main.main(args);


        // Done. Now lets check the generated Graph
        Graph graph = new Graph(new File("work/hh_2po.gph"));
        System.out.println("Graph Loaded. ID=" + graph.getGraphId());

        // Somewhere in Hamburg
        int sourceId = graph.findClosestVertexId(53.55f, 10.05f);
        int targetId = graph.findClosestVertexId(53.44f, 10.15f);

        // And call a simple route
        int [] path = newRouter(VertexRouter.class, graph, Log.stdout())
                .findShortestPath(sourceId, targetId);

        if (path != null) { // Found!
            for (int i = 0; i < path.length; i++) {
                RoutingResultSegment rrs = graph.lookupSegment(path[i]);
                int segId = rrs.getId();
                int from = rrs.getSourceId();
                int to = rrs.getTargetId();
                String segName = rrs.getName().toString();
                System.out.println(from + "-" + to + "  " + segId + "/" + path[i] + " " + segName);
            }
        } else {
            System.err.println("Sorry, route could not be found");
        }
        graph.close();      

    }
 
}

But I could not solve it. I want select a PBF file from sdcard in android phone and routing with custom lat, long. Please help me. What is the solution?