android - Firebase Jobdispatcher - 现在开始并重复

Question

根据这个例子，我看到我可以使用 Trigger.NOW 或 0,0 的时间让作业现在开始:

Bundle myExtrasBundle = new Bundle();
myExtrasBundle.putString("some_key", "some_value");

Job myJob = dispatcher.newJobBuilder()
    // the JobService that will be called
    .setService(MyJobService.class)
    // uniquely identifies the job
    .setTag("my-unique-tag")
    // one-off job
    .setRecurring(false)
    // don't persist past a device reboot
    .setLifetime(Lifetime.UNTIL_NEXT_BOOT)
    // start between 0 and 60 seconds from now
    .setTrigger(Trigger.executionWindow(0, 60))
    // don't overwrite an existing job with the same tag
    .setReplaceCurrent(false)
    // retry with exponential backoff
    .setRetryStrategy(RetryStrategy.DEFAULT_EXPONENTIAL)
    // constraints that need to be satisfied for the job to run
    .setConstraints(
        // only run on an unmetered network
        Constraint.ON_UNMETERED_NETWORK,
        // only run when the device is charging
        Constraint.DEVICE_CHARGING
    )
    .setExtras(myExtrasBundle)
    .build();

dispatcher.mustSchedule(myJob);

我的问题是:

我如何将作业设置为现在开始但每隔 [时间间隔](我们称之为 15 分钟)重复一次？

Answer 1

要让你的工作周期性地重复调用这两个方法:

.setRecurring(true) //true mean repeat it
.setTrigger(Trigger.executionWindow(start, end))

start :被称为 windowStart，这是作业应该被认为有资格运行的最早时间(以秒为单位)。从安排作业的时间开始计算(对于新作业)

end :被称为 windowEnd，作业应该在理想世界中运行的最晚时间(以秒为单位)。计算方式与windowStart相同。