我有一个通知，在显示时会显示不同的活动以鼓励用户参与。通知显示但是在关注Android开发人员文档之后，我将其编程为每天下午2点展示一次。不幸的是，它显示每20分钟一次。我不知道我做错了什么。我按照教程每隔2小时显示一次自定义通知，以获得基本的理解，但不希望用户看到很多通知。然后，我在SO上查看了各种问题/答案，发现使用报警管理器将是最佳选择。我根据谷歌警报管理器的例子修改了代码，但它没有按预期工作。这是我的代码以及到目前为止我尝试过的内容：
清单
<service
android:name=".EngagementNotification"
android:enabled="true"
android:exported="false" />
<receiver android:name=".EngagementNotificationInitReceiver" />
<receiver android:name=".EngagementNotificationInit">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.TIMEZONE_CHANGED" />
<action android:name="android.intent.action.TIME_SET" />
</intent-filter>
</receiver>
EngagementNotification
public class EngagementNotification extends IntentService {
private static final int NOTIFICATION_ID = 1;
private static final String ACTION_START = "ACTION_START";
private static final String ACTION_DELETE = "ACTION_DELETE";
public EngagementNotification() {
super(EngagementNotification.class.getSimpleName());
}
public static Intent createIntentStartNotificationService(Context context) {
Intent intent = new Intent(context, EngagementNotification.class);
intent.setAction(ACTION_START);
return intent;
}
public static Intent createIntentDeleteNotification(Context context) {
Intent intent = new Intent(context, EngagementNotification.class);
intent.setAction(ACTION_DELETE);
return intent;
}
@Override
protected void onHandleIntent(Intent intent) {
Log.d(getClass().getSimpleName(), "onHandleIntent, started handling a notification event");
try {
String action = intent.getAction();
if (ACTION_START.equals(action)) {
processStartNotification();
}
} finally {
WakefulBroadcastReceiver.completeWakefulIntent(intent);
}
}
private void processDeleteNotification(Intent intent) {
// Log something?
}
private void processStartNotification() {
// Do something. For example, fetch fresh data from backend to create a rich notification?
HashMap<String, String> mActivities = new HashMap<String, String>();
mActivities.put("ActivityOne", "com.example.testapp.ActivityOne");
mActivities.put("ActivityTwo", "com.example.testapp.ActivityTwo");
mActivities.put("ActivityThree", "com.example.testapp.ActivityThree");
mActivities.put("ActivityFour", "com.example.testapp.ActivityFour");
mActivities.put("ActivityFive", "com.example.testapp.ActivityFive");
mActivities.put("ActivitySix", "com.example.testapp.ActivitySix");
mActivities.put("ActivitySeven", "com.example.testapp.ActivitySeven");
mActivities.put("ActivityEight", "com.example.testapp.ActivityEight");
// Get a random entry from the HashMap.
Object[] crunchifyKeys = mActivities.keySet().toArray();
Object key = crunchifyKeys[new Random().nextInt(crunchifyKeys.length)];
Class<?> c = null;
if(mActivities.get(key) != null) {
try {
c = Class.forName(mActivities.get(key));
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
String mActivity = key.toString();
String strActivityFormat = getResources().getString(R.string.activity_message);
String strActivityMsg = String.format(strActivityFormat, mActivity);
Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
long[] v = {500,1000};
final NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setContentTitle(getResources().getString(R.string.bb_notif_title))
.setAutoCancel(true)
.setColor(getResources().getColor(R.color.colorAccent))
.setContentText(strActivityMsg)
.setSound(uri)
.setVibrate(v)
.setSmallIcon(R.mipmap.ic_launcher);
Intent mainIntent = new Intent(this, c);
PendingIntent pendingIntent = PendingIntent.getActivity(this,
NOTIFICATION_ID,
mainIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(pendingIntent);
builder.setDeleteIntent(EngagementNotificationInitReceiver.getDeleteIntent(this));
final NotificationManager manager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
manager.notify(NOTIFICATION_ID, builder.build());
}
}
EngagementNotificationInitReceiver
public class EngagementNotificationInitReceiver extends WakefulBroadcastReceiver {
private static final String ACTION_START_NOTIFICATION_SERVICE = "ACTION_START_NOTIFICATION_SERVICE";
private static final String ACTION_DELETE_NOTIFICATION = "ACTION_DELETE_NOTIFICATION";
public static void setupAlarm(Context context) {
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
PendingIntent alarmIntent = getStartPendingIntent(context);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 14);
alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY , alarmIntent);
}
public static void cancelAlarm(Context context) {
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
PendingIntent alarmIntent = getStartPendingIntent(context);
alarmManager.cancel(alarmIntent);
}
private static long getTriggerAt(Date now) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(now);
//calendar.add(Calendar.HOUR, NOTIFICATIONS_INTERVAL_IN_HOURS);
return calendar.getTimeInMillis();
}
private static PendingIntent getStartPendingIntent(Context context) {
Intent intent = new Intent(context, EngagementNotificationInitReceiver.class);
intent.setAction(ACTION_START_NOTIFICATION_SERVICE);
return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}
public static PendingIntent getDeleteIntent(Context context) {
Intent intent = new Intent(context, EngagementNotificationInitReceiver.class);
intent.setAction(ACTION_DELETE_NOTIFICATION);
return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Intent serviceIntent = null;
if (ACTION_START_NOTIFICATION_SERVICE.equals(action)) {
Log.i(getClass().getSimpleName(), "onReceive from alarm, starting notification service");
serviceIntent = EngagementNotification.createIntentStartNotificationService(context);
} else if (ACTION_DELETE_NOTIFICATION.equals(action)) {
Log.i(getClass().getSimpleName(), "onReceive delete notification action, starting notification service to handle delete");
serviceIntent = EngagementNotification.createIntentDeleteNotification(context);
}
if (serviceIntent != null) {
// Start the service, keeping the device awake while it is launching.
startWakefulService(context, serviceIntent);
}
}
}
EngagementNotificationInit
public class EngagementNotificationInit extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
EngagementNotificationInitReceiver.setupAlarm(context);
}
}
EngagementNotificationInitReceiver.setupAlarm方法应该确保通知在指定时间每天显示一次。