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