我的问题是当我设置2分钟后的时间是10:02，当我重启设备几次，可能是时间是10:03或10:04或10:05，我的通知总是显示出来每次。
我希望我的通知在10:02之后只显示一次，是否警报管理器无法将其用于系统？
如果是这样，我该如何避免这个问题？任何帮助将不胜感激。
我使用了alarmManager，SharePreferenes，BroadcastReceiver。
我的主要活动按钮功能：
public void onClickSetup(View view)
{
Toast.makeText(this,"Starting setting",Toast.LENGTH_SHORT).show();
Calendar cal = Calendar.getInstance();
// after 2 minutes
cal.add(Calendar.MINUTE, 2);
Intent intent = new Intent(this, PlayReceiver.class);
intent.putExtra("msg", "play_hskay");
PendingIntent pi = PendingIntent.getBroadcast(this, 1, intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi);
long time=cal.getTimeInMillis();
//Save the time for future
SharedPreferences preferences=getSharedPreferences("time",MODE_PRIVATE);
preferences.edit().putLong("saveTime",time)
.apply();
}
我的接收通知：
public class PlayReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Bundle bData = intent.getExtras();
if (bData.get("msg").equals("play_hskay")) {
Intent notificationIntent = new Intent(context, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(notificationIntent);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.addLine("message");
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context);
Notification notification;
notification = mBuilder.setSmallIcon(R.drawable.heart).setTicker("title").setWhen(0)
.setAutoCancel(true)
.setContentTitle("title")
//.setContentIntent(resultPendingIntent)
//.setSound(alarmSound)
.setStyle(inboxStyle)
//.setWhen(getTimeMilliSes(timeStamp))
.setSmallIcon(R.mipmap.ic_launcher)
//.setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
.setContentText("title")
.setContentIntent(pendingIntent)
.build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 , notification);
}
}
}
我的接收器重启设备：
public class AlarmInitReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,"Start~~~~",Toast.LENGTH_LONG).show();
// load system time for now. May be is 10:03、10:04、10:05
long current = Calendar.getInstance().getTimeInMillis();
// load the time when i set it before.
SharedPreferences preferences = context.getSharedPreferences("time", context.MODE_PRIVATE);
long setTime = preferences.getLong("saveTime", 0);
Toast.makeText(context,"Enter receiver setting",Toast.LENGTH_LONG).show();
Intent intentForSetTime = new Intent(context, PlayReceiver.class);
intentForSetTime.putExtra("msg", "play_hskay");
PendingIntent pi = PendingIntent.getBroadcast(context, 1, intentForSetTime, PendingIntent.FLAG_ONE_SHOT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, setTime, pi);//setTime suppose is 10:02
}
}
我的广播清单：
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<receiver android:name=".PlayReceiver">
<intent-filter>
<action android:name="play_hskay" />
</intent-filter>
</receiver>
<receiver android:name=".AlarmInitReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
答案 0 :(得分：1)
在这种情况下，在不改变代码的情况下，只需在警报事件发生时向sharedprefs添加标志，即调用PlayReceiver。
如果在重新启动之前发生了警报，那么boot_completed接收器将检查prefs中的标志是否已经完成。
然后可以相应地设置/不设置警报。
干杯... !!
public void onClickSetup(View view)
{
Toast.makeText(this, "Starting setting", Toast.LENGTH_SHORT).show();
Calendar cal = Calendar.getInstance();
// after 2 minutes
cal.add(Calendar.MINUTE, 2);
Intent intent = new Intent(this, PlayReceiver.class);
intent.putExtra("msg", "play_hskay");
PendingIntent pi = PendingIntent.getBroadcast(this, 1, intent, PendingIntent.FLAG_ONE_SHOT);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pi);
long time=cal.getTimeInMillis();
//Save the time for future
//Code Edit
SharedPreferences preferences=getPreferences(MODE_PRIVATE);
preferences.edit().putBoolean("received",false).commit();
}
public class PlayReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Bundle bData = intent.getExtras();
if (bData.get("msg").equals("play_hskay")) {
Intent notificationIntent = new Intent(context, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(notificationIntent);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
inboxStyle.addLine("message");
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context);
Notification notification;
notification = mBuilder.setSmallIcon(R.drawable.heart).setTicker("title").setWhen(0)
.setAutoCancel(true)
.setContentTitle("title")
//.setContentIntent(resultPendingIntent)
//.setSound(alarmSound)
.setStyle(inboxStyle)
//.setWhen(getTimeMilliSes(timeStamp))
.setSmallIcon(R.mipmap.ic_launcher)
//.setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
.setContentText("title")
.setContentIntent(pendingIntent)
.build();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0 , notification);
//Code Edit
SharedPreferences preferences=getPreferences(MODE_PRIVATE);
preferences.edit().putBoolean("received",true).commit();
}
}
}
public class AlarmInitReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//Code Edit
SharedPreferences preferences=getPreferences(MODE_PRIVATE);
boolean isReceived=preferences.getBoolean("received",false);
if(!isReceived)
{
Toast.makeText(context,"Start~~~~",Toast.LENGTH_LONG).show();
// load system time for now. May be is 10:03、10:04、10:05
long current = Calendar.getInstance().getTimeInMillis();
// load the time when i set it before.
SharedPreferences preferences = context.getSharedPreferences("time", context.MODE_PRIVATE);
long setTime = preferences.getLong("saveTime", 0);
Toast.makeText(context,"Enter receiver setting",Toast.LENGTH_LONG).show();
Intent intentForSetTime = new Intent(context, PlayReceiver.class);
intentForSetTime.putExtra("msg", "play_hskay");
PendingIntent pi = PendingIntent.getBroadcast(context, 1, intentForSetTime, PendingIntent.FLAG_ONE_SHOT);
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
am.set(AlarmManager.RTC_WAKEUP, setTime, pi);//setTime suppose is 10:02
}
}
}
答案 1 :(得分：-1)
对于我的代码我只需要启动服务..我已经使用过..
public void scheduleAlarm() {
// Construct an intent that will execute the AlarmReceiver
Intent intent = new Intent(this, LocationListnerServiec.class);
// Create a PendingIntent to be triggered when the alarm goes off
final PendingIntent pIntent = PendingIntent.getBroadcast(this, MyAlarmReceiver.REQUEST_CODE,
intent, PendingIntent.FLAG_UPDATE_CURRENT);
// Setup periodic alarm every 5 seconds
long firstMillis = System.currentTimeMillis(); // alarm is set right away
AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
// First parameter is the type: ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP, RTC_WAKEUP
// Interval can be INTERVAL_FIFTEEN_MINUTES, INTERVAL_HALF_HOUR, INTERVAL_HOUR, INTERVAL_DAY
alarm.setRepeating(AlarmManager.RTC_WAKEUP, firstMillis,
60000, pIntent);
}
和MyAlaramReciver类
public class MyAlarmReceiver extends BroadcastReceiver {
public static final int REQUEST_CODE = 12345;
// Triggered by the Alarm periodically (starts the service to run task)
@Override
public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, LocationListnerServiec.class);
i.putExtra("foo", "bar");
context.startService(i);
//Toast.makeText(context, "Welcome --------1", Toast.LENGTH_LONG).show();
}
}
试试可能会对你有帮助。