android ping ip 是WaitFor()阻塞问题

    public int executeCommand(final String command, final long timeout) throws IOException, InterruptedException, TimeoutException {
        Process process = Runtime.getRuntime().exec("ping -c 3 -w 100 "+command);
        PingWorker worker = new PingWorker(process);
        worker.start();
        try {
            worker.join(timeout);
            if (worker.exit != null){
                return worker.exit;
            } else{
                throw new TimeoutException();
            }
        } catch (InterruptedException ex) {
            worker.interrupt();
            Thread.currentThread().interrupt();
            throw ex;
        } finally {
            process.destroy();
        }
    }
class PingWorker extends Thread{
private final Process process;
    private Integer exit;
    
    public PingWorker(Process process){
this.process = process;
}
@Override
public void run() {
try {
exit = process.waitFor();
} catch (InterruptedException e) {
return;
}
}
}