如何执行两个Thread.sleep同步

Question

所以我试图同时执行两个线程睡眠。

线程1应该每20秒执行一次，同时线程2也应该每10秒执行一次。问题在线程2中我必须调用AsyncTask并且AsyncTask每20秒而不是10执行一次。 / p>

 new Thread(new Runnable() {
                @Override
                public void run() {

                    while (check) {
                        try {
                            mHandler.post(new Runnable() {

                                @Override
                                public void run() {
                                    // TODO Auto-generated method stub
                                    if (nw.isConnectingToInternet() ==false) {

                                        //dosometask
                                    }
                                }
                            });

                            Thread.sleep(20000);

                        } catch (Exception e) {
                        }
                    }
                }
            }).start();

           new Thread(new Runnable() {
                @Override
                public void run() {
                    // TODO Auto-generated method stub

                    Log.d("TAG", "10 sec over");
                    while (check) {
                        try {
                            mHandler.post(new Runnable() {

                                @Override
                                public void run() {
                                    // TODO Auto-generated method stub
                                    l1 = new Location_Provider(MainActivity.this);

                                    Locationcheck lchk = new Locationcheck();
                                    lchk.execute();
                                 }
                            });
                                Thread.sleep(10000);
                        } catch (Exception e) {
                        }
                    }
                }
            }).start();
           }

我哪里错了？请告诉我..