我看到一个简单的应用程序，在按下按钮5秒后安排通知。但我真正想做的是安排一个特定时间的通知（例如，通知显示在00:00），但我真的不知道如何设置该时刻（因为现在我＆＃39;使用＆＃34;延迟＆＃34;）。 这是代码：
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_5:
scheduleNotification(getNotification("5 second delay"), 5000);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void scheduleNotification(Notification notification, int delay) {
Intent notificationIntent = new Intent(this, NotificationPublisher.class);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION_ID, 1);
notificationIntent.putExtra(NotificationPublisher.NOTIFICATION, notification);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
long futureInMillis = SystemClock.elapsedRealtime() + delay;
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, futureInMillis, pendingIntent);
}
private Notification getNotification(String content) {
Notification.Builder builder = new Notification.Builder(this);
builder.setContentTitle("Scheduled Notification");
builder.setContentText(content);
builder.setSmallIcon(R.mipmap.ic_launcher);
return builder.build();
}
}
NotificationPublisher类
public class NotificationPublisher extends BroadcastReceiver {
public static String NOTIFICATION_ID = "notification-id";
public static String NOTIFICATION = "notification";
public void onReceive(Context context, Intent intent) {
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = intent.getParcelableExtra(NOTIFICATION);
int id = intent.getIntExtra(NOTIFICATION_ID, 0);
notificationManager.notify(id, notification);
}
}
如果我知道如何安排通知以便每天在00:00出现通知，那就更好了
答案 0 :(得分：2)
您要找的是RTC_WAKEUP。
您可以执行以下操作，而不是使用延迟：
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0); // For 00:00
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
您可以在此处找到更多信息：https://developer.android.com/training/scheduling/alarms.html
答案 1 :(得分：2)
以下是相同的代码：
public static void setNotificationScheduler(Context context) {
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, NotificationPublisher.class);
PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 999999, intent, PendingIntent.FLAG_CANCEL_CURRENT);
// Set the alarm to start at 00:00
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, alarmIntent);
}
答案 2 :(得分：1)
我以前遇到过这个问题。所以我很乐意帮助你，所以你不要浪费太多时间，我会尽量简单明了。
Get the Alarm service from the system.
Make a pending intent, passing in the broadcast receiver class's name.
Make a calendar object and set the time of it too 8 am.
Check if the current time is past 8. If yes then add another day to it.
Call the set repeating method of AlarmManager class.
相同的示例代码：
alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); alarmIntent = new Intent(context of current file, AlarmReceiver1.class); // AlarmReceiver1 = broadcast receiver
pendingIntent = PendingIntent.getBroadcast( Menu.this, 0, alarmIntent, PendingIntent.FLAG_UPDATE_CURRENT);
alarmIntent.setData((Uri.parse("custom://"+System.currentTimeMillis())));
alarmManager.cancel(pendingIntent);
Calendar alarmStartTime = Calendar.getInstance();
Calendar now = Calendar.getInstance();
alarmStartTime.set(Calendar.HOUR_OF_DAY, 8);
alarmStartTime.set(Calendar.MINUTE, 00);
alarmStartTime.set(Calendar.SECOND, 0);
if (now.after(alarmStartTime)) {
Log.d("Hey","Added a day");
alarmStartTime.add(Calendar.DATE, 1);
}
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, alarmStartTime.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
Log.d("Alarm","Alarms set for everyday 8 am.");
Coming to the broadcast receiver class. You need to register your broadcast receiver in the manifest. This will cause you to receive clock events.
Override the onReceive method of this broadcast receiver and make a notification there itself or make a seperate notification building service and build and display your notification there.
The manifest code snippet:
<receiver android:name="AlarmReceiver1" android:enabled="true">
The broadcast receiver code snippet:
public class AlarmReceiver1 extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Intent service1 = new Intent(context, NotificationService1.class);
service1.setData((Uri.parse("custom://"+System.currentTimeMillis())));
context.startService(service1);
}
Notification building service code snippet:
public class NotificationService1 extends IntentService{
private NotificationManager notificationManager;
private PendingIntent pendingIntent;
private static int NOTIFICATION_ID = 1;
Notification notification;
@Override
protected void onHandleIntent(Intent intent) {
ontext context = this.getApplicationContext();
notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent mIntent = new Intent(this, Activity to be opened after clicking on the notif);
Bundle bundle = new Bundle();
bundle.putString("test", "test");
mIntent.putExtras(bundle);
pendingIntent = PendingIntent.getActivity(context, 0, mIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Resources res = this.getResources();
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
notification = new NotificationCompat.Builder(this)
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(res, R.drawable.ic_launcher))
.setTicker("ticker value")
.setAutoCancel(true)
.setPriority(8)
.setSound(soundUri)
.setContentTitle("Notif title")
.setContentText("Text").build();
notification.flags |= Notification.FLAG_AUTO_CANCEL | Notification.FLAG_SHOW_LIGHTS;
notification.defaults |= Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE;
notification.ledARGB = 0xFFFFA500;
notification.ledOnMS = 800;
notification.ledOffMS = 1000;
notificationManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
notificationManager.notify(NOTIFICATION_ID, notification);
Log.i("notif","Notifications sent.");
}
}
有关代码的帮助，请点击此处:-http://www.singhajit.com/schedule-local-notification-in-android/ 你去吧而已。 希望这会有所帮助。