线程池ScheduledThreadPool

public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final ScheduledExecutorService scheduledThreadPool = Executors.newScheduledThreadPool(3);

        Runnable runnable = new Runnable() {
            @Override
            public void run() {

                Log.d("Thread", "This task is delayed to execute");
            }

        };
        scheduledThreadPool.schedule(runnable,10, TimeUnit.SECONDS);//延迟启动任务

//延迟5s后启动，每1s执行一次             scheduledThreadPool.scheduleAtFixedRate(runnable,5,1,TimeUnit.SECONDS);
//启动后第一次延迟5s执行，后面延迟1s执行  scheduledThreadPool.scheduleWithFixedDelay(runnable,5,1,TimeUnit.SECONDS);
    }
}