定时间点的任务

package com.qybm.zhy.service;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;

import java.lang.ref.WeakReference;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Timer;
import java.util.TimerTask;

public class TimeService extends Service {
    public static int ISTIME = 1;

    public TimeService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        throw new UnsupportedOperationException("Not yet implemented");
    }

    @Override
    public void onCreate() {
        super.onCreate();
        final TimeHandler handler = new TimeHandler(new WeakReference<TimeService>(this));
        TimerTask timerTask = new TimerTask() {
            @Override
            public void run() {
                handler.sendEmptyMessage(ISTIME);
            }
        };
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
        String time = dateFormat.format(new Date());

        Timer timer = new Timer(true);

        ParsePosition parsePosition = new ParsePosition(0);
        SimpleDateFormat timeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA);

        timer.schedule(timerTask, timeFormat.parse(time + " 21:02:00", parsePosition));
    }

    static class TimeHandler extends Handler {
        TimeHandler(WeakReference<TimeService> weakReference) {
            this.weakReference = weakReference;
        }

        WeakReference<TimeService> weakReference;

        @Override
        public void handleMessage(Message msg) {
            // TODO: 2019/7/31 0031 检查版本
        }
    }
}