我正在使用 WorkManager 来安排我的通知，它在我的智能手机处于活动状态时工作，但在我的智能手机处于待机状态时它不起作用。为什么？有一些限制让我这样做？管他呢？
CoreActivity.java中的方法notifyPush
public static void notifyPush(String message, Context context)
{
//codice di un altro programma
// Make a channel if necessary
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
CharSequence name = Constants.VERBOSE_NOTIFICATION_CHANNEL_NAME;
String description = Constants.VERBOSE_NOTIFICATION_CHANNEL_DESCRIPTION;
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
channel.setDescription(description);
// Add the channel
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (notificationManager != null) {
notificationManager.createNotificationChannel(channel);
}
}
// Create the notification
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_launcher_foreground)
.setContentTitle(Constants.NOTIFICATION_TITLE)
.setContentText(message)
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setDefaults(DEFAULT_ALL);
//.setVibrate(new long[0]);
// Show the notification
NotificationManagerCompat.from(context).notify(Constants.NOTIFICATION_ID, builder.build());
}
NotifyWorker.java
package com.example.msnma.movienotifier.notify;
import android.content.Context;
import android.support.annotation.NonNull;
import android.util.Log;
import com.example.msnma.movienotifier.CoreActivity;
import androidx.work.Data;
import androidx.work.Worker;
import static com.example.msnma.movienotifier.CoreActivity.notifyPush;
import static com.example.msnma.movienotifier.notify.Constants.KEY_MOVIE;
public class NotifyWorker extends Worker {
//private static final String TAG = BlurWorker.class.getSimpleName();
@NonNull
@Override
public Worker.Result doWork() {
Context applicationContext = getApplicationContext();
String message = getInputData().getString(Constants.KEY_MOVIE);
//setOutputData(new Data.Builder().putString(
//KEY_MOVIE, message.toString()).build());
try {
notifyPush(message , applicationContext);
return Worker.Result.SUCCESS;
} catch (Throwable throwable) {
// Technically WorkManager will return WorkerResult.FAILURE
// but it's best to be explicit about it.
// Thus if there were errors, we're return FAILURE
Log.e("NotifyWorker", "Error notification", throwable);
return Worker.Result.FAILURE;
}
}
}
MovieAdapter.java中的方法scheduleNotify和deleteNotify
private UUID scheduleNotify(Date d, int position)
{
long currentTime= System.currentTimeMillis();
//Calendar c = new Date;
long specificTimeToTrigger = d.getTime();
//d.getTimeToMillis();
long delayToPass = specificTimeToTrigger - currentTime;
/*OneTimeWorkRequest compressionWork =
new OneTimeWorkRequest.Builder(NotifyWorker.class)
.setInputData(message)
.setInitialDelay(delayToPass, TimeUnit.MILLISECONDS)
.build();*/
//inizialmente è molto semplice la notifica
OneTimeWorkRequest notifyRequest =
new OneTimeWorkRequest.Builder(NotifyWorker.class)
.setInputData(createInputDataForUri(movies.get(position)))
.setInitialDelay(delayToPass,TimeUnit.MILLISECONDS)
.build();
mWorkManager.enqueue(notifyRequest);
UUID notify_ID = notifyRequest.getId();
//WorkManager.getInstance().enqueue(compressionWork);
return notify_ID;
}
public void deleteNotify(UUID notify_ID)
{
WorkManager.getInstance().cancelWorkById(notify_ID);
}