Android--后台长期执行定时循环任务
版权声明：本文为博主原创文章，转载请标明出处。 https://blog.csdn.net/chaoyu168/article/details/79607270 import android.app.AlarmManager; import android.app.PendingIntent; import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.os.SystemClock; import java.util.Timer; import java.util.TimerTask; public class MyService extends Service { private Runnable runnable; private Handler handler; private int Time = 1000*3;//周期时间 private int anHour =8*60*60*1000;// 这是8小时的毫秒数 为了少消耗流量和电量，8小时自动更新一次 private Timer timer = new Timer(); @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } @Override public void onCreate() { super.onCreate(); /** * 方式一：采用Handler的postDelayed(Runnable, long)方法 */ handler = new Handler(); runnable = new Runnable() { @Override public void run() { // handler自带方法实现定时器 System.out.println("33331"); handler.postDelayed(this, 1000*3);//每隔3s执行 } }; handler.postDelayed(runnable, 1000*60);//延时多长时间启动定时器 /** * 方式二：采用timer及TimerTask结合的方法 */ TimerTask timerTask = new TimerTask() { @Override public void run() { System.out.println("99999998"); } }; timer.schedule(timerTask, 1000,//延迟1秒执行 Time);//周期时间 } /** * 方式三：采用AlarmManager机制 */ @Override public int onStartCommand(Intent intent, int flags, int startId) { new Thread(new Runnable() { @Override public void run() { System.out.println("99999988");//这是定时所执行的任务 } }).start(); AlarmManager manager = (AlarmManager) getSystemService(ALARM_SERVICE); long triggerAtTime = SystemClock.elapsedRealtime() + anHour; Intent intent2 = new Intent(this, AutoUpdateReceiver.class); PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent2, 0); manager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtTime, pi); return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { super.onDestroy(); } } public class AutoUpdateReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Intent i = new Intent(context, MyService.class); context.startService(i); } }记得注册广播和服务，建议使用方式三。
