安卓 开启service每分钟执行一次任务 模拟定时 或者定时任务移动开发hdhhd的博客-

再开始之前我们还是先介绍下service吧：此处用的是IntentService，至于和常规的service有什么区别呢?

有了Service为什么还要有个IntentService呢？

原因如下:

1)Service默认运行在主线程中，IntentService运行在一个新的线程中

2)Service需要主动调用stopSelf()或stopService()服务才可以停止，IntentService运行完后自动停止

使用IntentService需要注意2点:

1)构造函数中一定要调用父类的有参构造函数

2)需要耗时处理的事情放在onHandleIntent(Intent intent) 函数中
 

代码部分：此处实现的功能是一个在后台每分钟执行一次任务，时间可以修改，可以替代闹钟

MainActivity：

  public class MainActivity extends Activity {       @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);           //开启service  执行定时闹钟         Intent intent=new Intent(MainActivity.this, My_Service.class);         startService(intent);          } }

 My_Service： 

 package youli.com.example.administrator.ysapp_demo.fragment.YAOXIANG.naozhong;  import android.app.AlarmManager; import android.app.AlertDialog; import android.app.Dialog; import android.app.IntentService; import android.app.Service; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.media.Ringtone; import android.media.RingtoneManager; import android.os.Build; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.SystemClock; import android.support.annotation.AttrRes; import android.support.annotation.NonNull; import android.support.annotation.Nullable; import android.support.annotation.RequiresApi; import android.text.TextUtils; import android.util.Log; import android.view.WindowManager;  import java.util.ArrayList; import java.util.Calendar; import java.util.Collection; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; import java.util.Timer; import java.util.TimerTask;  import youli.com.example.administrator.ysapp_demo.Utils.SharedPreferencesUtils;  /**  * Created by Administrator on 2020/2/11.  */  public class My_Service extends IntentService {      Dialog dialog;      private ArrayList<Ringtone> listRingTone = new ArrayList<>();      private RingtoneManager ringtoneManager = null;      private String ls;     private int ckig;       private List<String> time;     private List<String> Shared_switch;      private static final String TAG = My_Service.class.getSimpleName();       //super(TAG); 此处要给一个值 不然会报错     public My_Service() {         super(TAG);     }      private int OPEN = 10000;      private Handler handler = new Handler() {         @Override         public void handleMessage(Message msg) {             super.handleMessage(msg);              if (msg.what == OPEN) {                  String values = String.valueOf(msg.obj);                 initview(values);  //开启提示音 与对话框             }         }     };      Map<String,List<String>> KV=null;      @Override     protected void onHandleIntent(@Nullable Intent intent) {            //开启一个while循环，给值为true无线循环          while (true) {             try {                //此处睡眠代表多久执行一次 一秒是1000                 Thread.sleep(10000);             } catch (InterruptedException e) {                 e.printStackTrace();             }               //此处是关键代码              String day_key = My_Service_Utils.getCalendar_day();              if(KV==null||!KV.containsKey(day_key))             {                 KV = new HashMap<>();                 KV.put(day_key, new ArrayList<String>() );             }              // 铃声管理器             My_Service_Utils.getRingtoneManager(this, ringtoneManager, listRingTone);              Shared_switch = new ArrayList<>();  //存放定时是否已开启             time = new ArrayList<>();  //存放时间              Shared_switch.clear();             Shared_switch = My_Service_Utils.get_Shared_switch();             time.clear();             time = My_Service_Utils.get_time();               //循环闹钟开启按钮是否打开               for (int i = 0; i < Shared_switch.size(); i++) {                                              // 如果值等于 "TRUE"代表闹钟已开启                 if (TextUtils.equals(Shared_switch.get(i), "TRUE")) {                       //获取定时的时间                     String show_time = time.get(i) ;                        Log.e("QQQ",show_time+"---"+My_Service_Utils.getCalendar()+"---"+i);                                                     //如多定时的时间show_time包含当前My_Service_Utils.getCalendar()系统的时间就往下执行                     if (show_time.contains(My_Service_Utils.getCalendar())) {                                                 //此处控制一分钟执行一次                         if(KV.get(day_key).contains(show_time ))                         {                             continue;                         }                         else                         {                             KV.get(day_key).add(show_time);                         }                           String open = String.valueOf(i + 1);  //这里的值代对应要开关的灯                          My_Service_Utils.getOpen(this, open);//开灯                          Message msg = new Message();                         msg.obj = open;                         msg.what = OPEN;                         handler.sendMessage(msg);                     }                 }             }         }     }       private void initview(final String open) {          //获取需要播放的铃声         ls = SharedPreferencesUtils.getString("LS");          if (!TextUtils.equals(ls, "")) {             ckig = Integer.parseInt(ls);         } else {             ckig = 0;         }          listRingTone.get(ckig).play();          AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());         builder.setMessage("该吃药了哦!");          builder.setPositiveButton("已完成", new DialogInterface.OnClickListener() {             @RequiresApi(api = Build.VERSION_CODES.KITKAT)             @Override             public void onClick(DialogInterface dialog, int which) {                  listRingTone.get(ckig).stop();  //关闭音乐                  My_Service_Utils.getClose(getApplicationContext(), open);          //关灯              }         });         dialog = builder.create();         dialog.setCanceledOnTouchOutside(false);         dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);         dialog.show();      }   } 

 String day_key = My_Service_Utils.getCalendar_day(); 获取年月日，以这个作为map集合的key 

 String show_time = time.get(i) ;//定时的时间

应为睡眠时间设置的是10秒执行一次，当到达定时的时间先回判断 KV.get(day_key).contains(show_time )是否包含当前时间，包含continue退出，否则把当前时间添加到 KV.get(day_key).add(show_time);并执行余下代码操作

 if(KV.get(day_key).contains(show_time )) {     continue; } else {     KV.get(day_key).add(show_time); }  上面所用到的工具类： 

 package youli.com.example.administrator.ysapp_demo.fragment.YAOXIANG.naozhong;  import android.content.Context; import android.database.Cursor; import android.media.Ringtone; import android.media.RingtoneManager; import android.os.Build; import android.support.annotation.RequiresApi;  import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.Timer; import java.util.TimerTask;  import youli.com.example.administrator.ysapp_demo.Utils.SharedPreferencesUtils; import youli.com.example.administrator.ysapp_demo.chuankou.week_RQ; import youli.com.example.administrator.ysapp_demo.fragment.FragmentYaoXiang; import youli.com.example.administrator.ysapp_demo.fragment.YAOXIANG.timeutils;  /**  * Created by Administrator on 2020/3/3.  */  public class My_Service_Utils {       public static void getRingtoneManager(Context context, RingtoneManager ringtoneManager, ArrayList<Ringtone> listRingTone) {         if (ringtoneManager == null) {             ringtoneManager = new RingtoneManager(context); // 铃声管理器             Cursor cursor = ringtoneManager.getCursor(); //获取铃声表,根据表名取值             int count = cursor.getCount(); //获取铃声列表数量             for (int i = 0; i < count; i++) {                 listRingTone.add(ringtoneManager.getRingtone(i));             }         }     }       public static void getOpen(Context context, String values) {          //开灯         switch (Integer.valueOf(values)) {             case 1:                 week_RQ.send_Serial(context, (byte) 0x01);                 break;             case 2:                 week_RQ.send_Serial(context, (byte) 0x02);                 break;             case 3:                 week_RQ.send_Serial(context, (byte) 0x04);                 break;             case 4:                 week_RQ.send_Serial(context, (byte) 0x08);                 break;             case 5:                 week_RQ.send_Serial(context, (byte) 0x10);                 break;             case 6:                 week_RQ.send_Serial(context, (byte) 0x20);                 break;             case 7:                 week_RQ.send_Serial(context, (byte) 0x40);                 break;             case 8:                 week_RQ.send_Serial(context, (byte) 0x01);                 break;             case 9:                 week_RQ.send_Serial(context, (byte) 0x02);                 break;             case 10:                 week_RQ.send_Serial(context, (byte) 0x04);                 break;             case 11:                 week_RQ.send_Serial(context, (byte) 0x08);                 break;             case 12:                 week_RQ.send_Serial(context, (byte) 0x10);                 break;             case 13:                 week_RQ.send_Serial(context, (byte) 0x20);                 break;             case 14:                 week_RQ.send_Serial(context, (byte) 0x40);                 break;          }     }      //关灯     @RequiresApi(api = Build.VERSION_CODES.KITKAT)     public static void getClose(final Context context, String values) {         //关灯         switch (Integer.valueOf(values)) {             case 1:                  week_RQ.send_Serial(context, (byte) 0x00);              case 2: //                 week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 3:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 4:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 5:                  week_RQ.send_Serial(context, (byte) 0x00);                   break;              case 6:                  week_RQ.send_Serial(context, (byte) 0x00);                   break;              case 7:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 8:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 9:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 10:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 11:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 12:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 13:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;              case 14:                  week_RQ.send_Serial(context, (byte) 0x00);                  break;         }      }          //此处获取定时开关是否开启     public static List<String> get_Shared_switch() {  //        List<String> Shared_switch = null;  //        if (Shared_switch == null)             List<String>  Shared_switch = new ArrayList<>();          //user1早餐-睡前         String Shared_flag1 = SharedPreferencesUtils.getString("Shared_flag1");         String Shared_flag2 = SharedPreferencesUtils.getString("Shared_flag2");         String Shared_flag3 = SharedPreferencesUtils.getString("Shared_flag3");         String Shared_flag4 = SharedPreferencesUtils.getString("Shared_flag4");         String Shared_flag5 = SharedPreferencesUtils.getString("Shared_flag5");         String Shared_flag6 = SharedPreferencesUtils.getString("Shared_flag6");         String Shared_flag7 = SharedPreferencesUtils.getString("Shared_flag7");           Shared_switch.clear();         Shared_switch.add(Shared_flag1);         Shared_switch.add(Shared_flag2);         Shared_switch.add(Shared_flag3);         Shared_switch.add(Shared_flag4);         Shared_switch.add(Shared_flag5);         Shared_switch.add(Shared_flag6);         Shared_switch.add(Shared_flag7);           return Shared_switch;     }        //此处获取定时的时间     public static List<String> get_time() {  //        List<String> time = null;          List<String>    time = new ArrayList<>();         time.clear();         //user1时间 早餐-睡前         String user1_time1 = SharedPreferencesUtils.getString("user1_time1");         String user1_time2 = SharedPreferencesUtils.getString("user1_time2");         String user1_time3 = SharedPreferencesUtils.getString("user1_time3");         String user1_time4 = SharedPreferencesUtils.getString("user1_time4");         String user1_time5 = SharedPreferencesUtils.getString("user1_time5");         String user1_time6 = SharedPreferencesUtils.getString("user1_time6");         String user1_time7 = SharedPreferencesUtils.getString("user1_time7");           time.add(user1_time1);         time.add(user1_time2);         time.add(user1_time3);         time.add(user1_time4);         time.add(user1_time5);         time.add(user1_time6);         time.add(user1_time7);           return time;     }      //获取当前系统时间     public static String getCalendar() {          long time = System.currentTimeMillis();          SimpleDateFormat format = new SimpleDateFormat("HH:mm");          Date date = new Date(time);          String t1 = format.format(date);          return t1;     }  //获取年月日     public static String getCalendar_day() {          long time = System.currentTimeMillis();          SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");          Date date = new Date(time);          String t1 = format.format(date);          return t1;     }  } 

又不懂的欢迎交流