android - 在 android oreo 中设备重启后 PeriodicWorkRequest 不工作

Question

我需要根据以下逻辑向用户推送应用通知。

• A 类通知将每 24 小时显示一次。
• B 类通知将每 7 天显示一次。
• C 类通知将每 15 天显示一次。

我按如下方式使用了 PeriodicWorkRequest 工作管理器，在设备重新启动之前它工作正常。设备重启后，我的工作不会被触发。

build.gradle ---

implementation 'android.arch.work:work-runtime:1.0.0-alpha04'

Java代码

PeriodicWorkRequest showNotification =
                new PeriodicWorkRequest.Builder(ShowNotificationWorkManager.class, interval,
                        TimeUnit.HOURS)
                        .addTag(notificationType)
                        .setInputData(myData)
                        .build();

getWorkManger().enqueue(showNotification);

Answer 1

我试过这段代码并与我一起处理旧 API 和新 API:此代码在设备重新启动时每 15 分钟执行一次服务(workmanager)。对于 AndroidManifest.xml 文件:

<receiver android:name=".WorkManagerStartReceiver" >
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <action android:name="android.intent.action.QUICKBOOT_POWERON" />
    </intent-filter>
</receiver>

在 WorkManagerStartReceiver 类上:

public class WorkManagerStartReceiver extends BroadcastReceiver {
    WorkManager mWorkManager;

    @Override
    public void onReceive(Context context, Intent intent) {

        PeriodicWorkRequest.Builder myWorkBuilder =
                new PeriodicWorkRequest.Builder(TestWorker.class,
                        PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
                        TimeUnit.MILLISECONDS);

        PeriodicWorkRequest myWork = myWorkBuilder.build();
        mWorkManager = WorkManager.getInstance(context);
        mWorkManager.enqueue(myWork);

    }
}

虽然 TestWorker.class 是扩展 Worker 的类:

public class TestWorker extends Worker {

    public TestWorker(@NonNull Context context, @NonNull WorkerParameters workerParams) {
        super(context, workerParams);
    }

    @NonNull
    @Override
    public Result doWork() {

        //your work that you want to execute here
        return null;
    }
}

如果您希望服务在应用程序打开时开始工作，则此代码段(在 MainActivity 上)会在应用程序打开时打开。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    PeriodicWorkRequest.Builder myWorkBuilder =
            new PeriodicWorkRequest.Builder(TestWorker.class,
                                            PeriodicWorkRequest.MIN_PERIODIC_INTERVAL_MILLIS,
                                            TimeUnit.MILLISECONDS);
    PeriodicWorkRequest myWork = myWorkBuilder.build();
    WorkManager.getInstance(MainActivity.this)
            .enqueueUniquePeriodicWork("testworker", ExistingPeriodicWorkPolicy.KEEP, myWork);
}