Android 延时执行任务的三种简单方法

开启一个新的线程

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

　　

handler 加 postDelayed 

 handler.postDelayed(new Runnable() {
                            @Override
                            public void run() {
                                startActivity(new Intent(LeadActivity.this, WelcomeActivity.class));
                            }
                        },3000);
                    }

　　

定时器  TimerTask  和 Timer

 TimerTask task = new TimerTask() {
                            @Override
                            public void run() {
                                startActivity(new Intent(LeadActivity.this, WelcomeActivity.class));
                            }
                        };
                        Timer timer = new Timer();
                        timer.schedule(task,1000);
                    }