我尝试将通知安排在特定的日期和时间，但是在大多数设备上似乎没有显示通知。在android 9/8之前，我已经使用了AlarmManager，它非常容易使用并且可以正常工作，但是android的最后2个版本已经改变了这个...（感谢google，使一切变得更加简单...）
因此，这是我用来安排通知的代码。我正在使用OneTimeWorkRequest
tag = new AlertsManager(this).getCarId(nrInmatriculare);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
Data inputData = new Data.Builder().putString("type", alarmType).putString("nrInmatriculare", nrInmatriculare).build();
OneTimeWorkRequest notificationWork = new OneTimeWorkRequest.Builder(NotifyWorker.class)
.setInitialDelay(calculateDelay(when), TimeUnit.MILLISECONDS)
.setInputData(inputData)
.addTag(String.valueOf(tag))
.build();
WorkManager.getInstance().enqueue(notificationWork);
}
else {
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, when, (24 * 60 * 60 * 1000), pendingIntent);
}
然后我用来显示通知的类是：
public class NotifyWorker extends Worker {
public NotifyWorker(@NonNull Context context, @NonNull WorkerParameters params) {
super(context, params);
}
@NonNull
@Override
public Worker.Result doWork() {
// Method to trigger an instant notification
new NotificationIntentService().showNotification(getInputData().getString("type"),getInputData().getString("nrInmatriculare"), getApplicationContext());
return Worker.Result.SUCCESS;
// (Returning RETRY tells WorkManager to try this task again
// later; FAILURE says not to try again.)
}
}
还有一个：
public class NotificationIntentService extends IntentService {
final Uri notificationSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
int alarmId = 0;
public NotificationIntentService() {
super("NotificationIntentService");
}
@Override
protected void onHandleIntent(Intent intent) {
showNotification(intent);
}
//show notification with workmanager
public void showNotification(String type, String nrInmatriculare, Context context){
try
{
if (!TextUtils.isEmpty(type) && !TextUtils.isEmpty(nrInmatriculare)) {
AlertsManager alertsManager = new AlertsManager(context);
Notifications notification = alertsManager.getAlertForCar(nrInmatriculare);
String text ="";
Calendar endDate = null;
String date = notification.EndDate.get(Calendar.YEAR) + "-" + (notification.EndDate.get(Calendar.MONTH)/10==0 ? "0"+(notification.EndDate.get(Calendar.MONTH)+1) : (notification.EndDate.get(Calendar.MONTH))+1) + "-" + (notification.EndDate.get(Calendar.DAY_OF_MONTH)/10==0 ? "0"+notification.EndDate.get(Calendar.DAY_OF_MONTH) : notification.EndDate.get(Calendar.DAY_OF_MONTH));
text = context.getString(R.string.notificationText).toString().replace("#type#", type.toUpperCase()).replace("#nrInmatriculare#", nrInmatriculare).replace("#date#", date ).replace("#days#", String.valueOf(new Utils().getDateDifferenceInDays(Calendar.getInstance(), notification.EndDate)));
alarmId = alertsManager.getCarId(nrInmatriculare);
endDate = (Calendar)notification.EndDate.clone();
if (Calendar.getInstance().getTimeInMillis() > endDate.getTimeInMillis()){ //current time is after the end date (somehow the alarm is fired)
}
else {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//define the importance level of the notification
int importance = NotificationManager.IMPORTANCE_HIGH;
//build the actual notification channel, giving it a unique ID and name
NotificationChannel channel = new NotificationChannel("AppName", "AppName", importance);
//we can optionally add a description for the channel
String description = "A channel which shows notifications about events at Masina";
channel.setDescription(description);
//we can optionally set notification LED colour
channel.setLightColor(Color.MAGENTA);
// Register the channel with the system
NotificationManager notificationManager = (NotificationManager)context.
getSystemService(Context.NOTIFICATION_SERVICE);
if (notificationManager != null) {
notificationManager.createNotificationChannel(channel);
}
//---------
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "AppName");
builder.setContentTitle(context.getString(R.string.app_name));
builder.setContentText(text);
builder.setSmallIcon(R.mipmap.ic_launcher);
builder.setAutoCancel(true);
builder.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE | Notification.DEFAULT_LIGHTS);
builder.setLights(Color.CYAN, 1000, 2000);
builder.setPriority(NotificationCompat.PRIORITY_HIGH);
builder.setSound(notificationSound);
builder.setStyle(new NotificationCompat.BigTextStyle().bigText(text));
Intent notifyIntent = null;
if (type.equals("CarteDeIdentitate") || type.equals("PermisDeConducere"))
notifyIntent = new Intent(context, PersonalDataActivity.class);
else
notifyIntent = new Intent(context, DetailActivity.class);
notifyIntent.putExtra("car", new SharedPreference(context).getCarDetailString(nrInmatriculare));
// Create the TaskStackBuilder and add the intent, which inflates the back stack
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addNextIntentWithParentStack(notifyIntent);
//PendingIntent pendingIntent = PendingIntent.getActivity(context, alarmId, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(alarmId, PendingIntent.FLAG_UPDATE_CURRENT);
//to be able to launch your activity from the notification
builder.setContentIntent(pendingIntent);
//trigger the notification
NotificationManagerCompat notificationAlert = NotificationManagerCompat.from(context);
notificationManager.notify(alarmId, builder.build());
}
}
}
else
{
Log.d("here","No extra");
}
}
catch(Exception ex)
{
Log.d("here","Error");
}
}
}
我在做什么错？有一种最佳，更有效的方法吗？
编辑： 我想看一个有关如何将通知安排到特定日期和时间的示例，这确实有效。
答案 0 :(得分：1)
尝试下面的代码，我已经在我的一个应用程序中使用了它，对我来说很好。
private void startWorkForWeekNotification() {
OneTimeWorkRequest oneTimeWorkRequest = new OneTimeWorkRequest.Builder(
OpenAppNotifyWorker.class)
.setInitialDelay(OpenAppNotifyWorker.NOTIFY_TO_OPEN_APP_IN_DAYS, TimeUnit.DAYS)
.build();
WorkManager.getInstance().beginUniqueWork(
OpenAppNotifyWorker.WORKER_NAME,
ExistingWorkPolicy.REPLACE,
oneTimeWorkRequest).enqueue();
}
工人阶级
public class OpenAppNotifyWorker extends Worker {
public static final String WORKER_NAME = "OpenAppNotifyWorker";
public static final int NOTIFY_TO_OPEN_APP_IN_DAYS = 7;
public OpenAppNotifyWorker(@NonNull Context context,
@NonNull WorkerParameters workerParams) {
super(context, workerParams);
}
@NonNull
@Override
public Result doWork() {
NotificationUtils
.showNotification(getApplicationContext(), NotificationUtils.UPDATE_CHANNEL_ID,
NotificationUtils.UPDATE_NOTIFICATION_ID);
return Result.success();
}
}
NotificationUtils类
public class NotificationUtils {
public static final String UPDATE_CHANNEL_ID = "updates";
public static final int UPDATE_NOTIFICATION_ID = 1;
public static final int NOTIFICATION_REQUEST_CODE = 50;
public static void showNotification(Context context, String channelId, int notificationId) {
createNotificationChannel(context, channelId);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
context, channelId)
.setSmallIcon(R.drawable.ic_splash_logo)
.setContentTitle(context.getString(R.string.title_notification))
.setContentText(context.getString(R.string.msg_body_notification))
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManagerCompat notificationManager = NotificationManagerCompat
.from(context);
notificationManager.notify(notificationId, mBuilder.build());
}
public static void createNotificationChannel(Context context, String channelId) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//TODO change channel name and description
CharSequence name = context.getString(R.string.notification_channel_updates);
String description = context.getString(R.string.desc_notification_channel);
int importance = NotificationManager.IMPORTANCE_DEFAULT;
NotificationChannel channel = new NotificationChannel(
channelId, name, importance);
channel.setDescription(description);
NotificationManager notificationManager = context
.getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);
}
}
public static void createPushNotification(Context context, String message) {
NotificationUtils
.createNotificationChannel(context, NotificationUtils.UPDATE_CHANNEL_ID);
Intent notificationIntent = new Intent(context, SplashActivity.class);
notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
notificationIntent.setAction(Intent.ACTION_MAIN);
notificationIntent.addCategory(Intent.CATEGORY_LAUNCHER);
notificationIntent.putExtra(FcmPushListenerService.EXTRAS_NOTIFICATION_DATA, message);
PendingIntent contentIntent = PendingIntent
.getActivity(context, NOTIFICATION_REQUEST_CODE, notificationIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
context, NotificationUtils.UPDATE_CHANNEL_ID)
.setSmallIcon(R.drawable.ic_notification_app_logo)
.setContentTitle(context.getString(R.string.app_name))
.setContentText(message)
.setAutoCancel(true)
.setContentIntent(contentIntent)
.setPriority(NotificationCompat.PRIORITY_DEFAULT);
NotificationManagerCompat notificationManager = NotificationManagerCompat
.from(context);
notificationManager.notify(NotificationUtils.UPDATE_NOTIFICATION_ID, mBuilder.build());
}
public static void cancelAllNotification(Context context) {
NotificationManagerCompat notificationManager = NotificationManagerCompat
.from(context);
notificationManager.cancelAll();
}
}
如果要启动服务，可以按照以下步骤进行：
public class OpenAppNotifyWorker extends Worker {
public static final String WORKER_NAME = "OpenAppNotifyWorker";
public static final int NOTIFY_TO_OPEN_APP_IN_DAYS = 7;
public Context context;
public OpenAppNotifyWorker(@NonNull Context context,
@NonNull WorkerParameters workerParams) {
this.context = context
super(context, workerParams);
}
@NonNull
@Override
public Result doWork() {
context.startService(new NotificationIntentService())
return Result.success();
}
}
答案 1 :(得分：0)
这是我在一个项目中使用的可行的实现。
将此添加到您的build.gradle (app)（因为它在Kotlin中）
//android-jet pack
implementation 'android.arch.work:work-runtime-ktx:1.0.1'
创建方法scheduleNotification。
传递您的必要数据
fun scheduleNotification(timeDelay: Long, tag: String, body: String) {
val data = Data.Builder().putString("body", body)
val work = OneTimeWorkRequestBuilder<NotificationSchedule>()
.setInitialDelay(timeDelay, TimeUnit.MILLISECONDS)
.setConstraints(Constraints.Builder().setTriggerContentMaxDelay(Constant.ONE_SECOND, TimeUnit.MILLISECONDS).build()) // API Level 24
.setInputData(data.build())
.addTag(tag)
.build()
WorkManager.getInstance().enqueue(work)
}
NotificationSchedule类
class NotificationSchedule (var context: Context, var params: WorkerParameters) : Worker(context, params) {
override fun doWork(): Result {
val data = params.inputData
val title = "Title"
val body = data.getString("body")
TriggerNotification(context, title, body)
return Result.success()
}
}
TriggerNotification类。根据您的需要自定义此类
class TriggerNotification(context: Context, title: String, body: String) {
init {
sendNotification(context, title, body)
}
private fun createNotificationChannel(context: Context, name: String, description: String): String {
// Create the NotificationChannel, but only on API 26+ because
// the NotificationChannel class is new and not in the support library
val chanelId = UUID.randomUUID().toString()
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val importance = NotificationManager.IMPORTANCE_HIGH
val channel = NotificationChannel(chanelId, name, importance)
channel.enableLights(true)
channel.enableVibration(true)
channel.description = description
channel.lightColor = Color.BLUE
channel.lockscreenVisibility = Notification.VISIBILITY_PUBLIC
val notificationManager = context.getSystemService(NotificationManager::class.java)
notificationManager?.createNotificationChannel(channel)
}
return chanelId
}
private fun sendNotification(context: Context, title: String, body: String) {
val notificationManager = NotificationManagerCompat.from(context)
val mBuilder = NotificationCompat.Builder(context, createNotificationChannel(context, title, body))
val notificationId = (System.currentTimeMillis() and 0xfffffff).toInt()
mBuilder.setDefaults(Notification.DEFAULT_ALL)
.setTicker("Hearty365")
.setContentTitle(title)
.setContentText(body)
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setPriority(NotificationCompat.PRIORITY_HIGH)
.setSmallIcon(R.drawable.icon)
.setContentInfo("Content Info")
.setAutoCancel(true)
notificationManager.notify(notificationId, mBuilder.build())
}
}