Android JobScheduler每天只运行一次

Question

我签出了自Android API级别21以来可以使用的JobScheduler API.我想安排一项需要互联网的任务,每天只运行一次或每周运行一次(如果成功执行).我没有找到关于这种情况的例子.有人能帮我吗？谢谢.

Answer 1

请按照一个简单的例子来说明您的问题,我相信它会对您有所帮助:

AndroidManifest.xml中:

<service android:name=".YourJobService"
    android:permission="android.permission.BIND_JOB_SERVICE" />

YourJobService.java:

class YourJobService extends JobService {
    private static final int JOB_ID = 1;
    private static final long ONE_DAY_INTERVAL = 24 * 60 * 60 * 1000L; // 1 Day
    private static final long ONE_WEEK_INTERVAL = 7 * 24 * 60 * 60 * 1000L; // 1 Week

    public static void schedule(Context context, long intervalMillis) {
        JobScheduler jobScheduler = (JobScheduler) 
            context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
        ComponentName componentName =
            new ComponentName(context, YourJobService.class);
        JobInfo.Builder builder = new JobInfo.Builder(JOB_ID, componentName);
        builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY);
        builder.setPeriodic(intervalMillis);
        jobScheduler.schedule(builder.build());
    }

    public static void cancel(Context context) {
        JobScheduler jobScheduler = (JobScheduler)
            context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
        jobScheduler.cancel(JOB_ID);    
    }

    @Override
    public boolean onStartJob(final JobParameters params) {
        /* executing a task synchronously */
        if (/* condition for finishing it */) {
            // To finish a periodic JobService, 
            // you must cancel it, so it will not be scheduled more.
            YourJobService.cancel(this);
        }

        // false when it is synchronous.
        return false;
    }

    @Override
    public boolean onStopJob(JobParameters params) {
        return false;
    }
}

调度作业后,调用YourJobService.schedule(context, ONE_DAY_INTERVAL).它只会在连接到某个网络时调用,一旦在内部一天内调用...即每天一次连接到网络.

Obs.:Periodic工作只能完成调用JobScheduler.cancel(Job_Id),jobFinished()方法不能完成.

视频:如果你想把它改为"每周一次" - YourJobService.schedule(context, ONE_WEEK_INTERVAL).

obs.:Android L上的定期作业可以在您设置的范围内随时运行一次.