Android 延时执行任务的三种简单方法

  new Thread() {
                            @Override
                            public void run() {
                                try {
                                    Thread.sleep(2000);
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                }
                                startActivity(new Intent(LeadActivity.this, WelcomeActivity.class));
                            }
                        }.start();
  new Thread() {