是否可以更改 android 中重复通知的内容文本或消息？如果是，如何？
Is it possible to change the content text or message of a repeating notification in android ? If yes, how?
我在广播接收器中收到重复通知。我想动态替换内容文本。通知将在下次显示通知时向用户显示不同的消息。我想知道是否可能。如果是，如何？
下面是我的广播接收器class
public class TimeAlarm extends BroadcastReceiver {
NotificationManager nm;
long pattern[] = {500, 500};
private Uri notifsound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
private NotificationCompat.BigTextStyle contentStyle;
@Override
public void onReceive(Context context, Intent intent) {
String msg = "Drivers who sit higher feel as if they're driving slower. " +
"Thus, SUV drivers, who are already piloting the vehicles most prone to " +
"roll, drive faster because they feel like they're creeping along. " +
"So lower your seat to get the sensation of more speed.";
contentStyle = new android.support.v4.app.NotificationCompat.BigTextStyle();
contentStyle.bigText(msg);
contentStyle.setBigContentTitle("Lower Your Seat");
contentStyle.setSummaryText("AutoKit");
NotificationCompat.Builder builder;
builder = (NotificationCompat.Builder) new NotificationCompat.Builder(context)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("AutoKit")
.setContentText("Tip of the Day")
.setTicker("Daily Tip")
.setStyle(contentStyle)
.setSound(notifsound)
.setAutoCancel(true)
.setVibrate(pattern);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(1, builder.build());
}
}
这是在我的主活动中调用的方法，并将广播接收器绑定到警报管理器
public void setRepeatingAlarm(){ //user receives notifications every 24 hours at 7am
am = (AlarmManager)this.getSystemService(this.ALARM_SERVICE);
Intent intent = new Intent(this, TimeAlarm.class);
PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 07);
calendar.set(Calendar.MINUTE, 00);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1000 * 60 * 60 * 24, pi);
}
修改通知
要设置通知以便更新，请通过调用 NotificationManager.notify(ID, notification) 向其发出通知 ID。要在发出通知后更新此通知，请更新或创建一个 NotificationCompat.Builder 对象，从中构建一个通知对象，然后使用您之前使用的相同 ID 发出通知。
以下代码片段演示了更新后的通知以反映已发生事件的数量。它堆叠通知，显示摘要：
mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Sets an ID for the notification, so it can be updated
int notifyID = 1;
mNotifyBuilder = new NotificationCompat.Builder(this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.ic_notify_status)
numMessages = 0;
// Start of a loop that processes data and then notifies the user
...
mNotifyBuilder.setContentText(currentText)
.setNumber(++numMessages);
// Because the ID remains unchanged, the existing notification is
// updated.
mNotificationManager.notify(
notifyID,
mNotifyBuilder.build());
...
取自开发者网站。请参考，http://developer.android.com/training/notify-user/managing.html
这里是我在广播接收器中所做的更改 class。
public class TimeAlarm extends BroadcastReceiver {
NotificationManager nm;
long pattern[] = {500, 500};
private Uri notifsound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
private NotificationCompat.BigTextStyle contentStyle;
private List contentTexts, contentTitles;
@Override
public void onReceive(Context context, Intent intent) {
contentTexts = new ArrayList<String>();
contentTitles = new ArrayList<String>();
prepareContentTitles();
prepareContentTexts();
SharedPreferences prefs = context.getSharedPreferences("notification_count", context.MODE_PRIVATE);
int count = prefs.getInt("notification_count", 0);
contentStyle = new android.support.v4.app.NotificationCompat.BigTextStyle();
contentStyle.bigText((CharSequence) contentTexts.get(count));
contentStyle.setBigContentTitle((CharSequence) contentTitles.get(count));
contentStyle.setSummaryText("AutoKit");
NotificationCompat.Builder builder;
builder = (NotificationCompat.Builder) new NotificationCompat.Builder(context)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("AutoKit")
.setContentText("Tip of the Day")
.setTicker("Daily Tip")
.setStyle(contentStyle)
.setSound(notifsound)
.setAutoCancel(true)
.setVibrate(pattern);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(1, builder.build());
if (count == contentTexts.size() - 1) {
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("notification_count", 0);
editor.commit();
}
else {
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("notification_count", count + 1);
editor.commit();
}
}
public void prepareContentTexts() {
contentTexts.add("Drivers who sit higher feel as if they're driving slower. " +
"Thus, SUV drivers, who are already piloting the vehicles most prone to " +
"roll, drive faster because they feel like they're creeping along. " +
"So lower your seat to get the sensation of more speed.");
contentTexts.add("Manufacturers recommend replacing your blades every three months. " +
"Keep a spare set in your trunk. A product such as Rain Clear can also help " +
"minimize the work of your wipers; spray it onto the glass every few weeks. " +
"In some light rains, it makes the wipers almost unnecessary");
contentTexts.add("At the BMW Performance Driving School, instructor Jim Clark says " +
"these four words over and over: \"Slow in, fast out.\" When taking a corner," +
" you need to scrub as much of that speed as you can while the car is braking" +
" in a straight line, then you can accelerate out of the curve. The converse " +
"is \"Fast in, maybe no out.\"");
}
public void prepareContentTitles() {
contentTitles.add("Lower Your Seat");
contentTitles.add("Rainproof Your Windshield");
contentTitles.add("Maneuver Tight Corners ");
}
}
通知每次触发时显示不同的内容文本
我在广播接收器中收到重复通知。我想动态替换内容文本。通知将在下次显示通知时向用户显示不同的消息。我想知道是否可能。如果是，如何？
下面是我的广播接收器class
public class TimeAlarm extends BroadcastReceiver {
NotificationManager nm;
long pattern[] = {500, 500};
private Uri notifsound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
private NotificationCompat.BigTextStyle contentStyle;
@Override
public void onReceive(Context context, Intent intent) {
String msg = "Drivers who sit higher feel as if they're driving slower. " +
"Thus, SUV drivers, who are already piloting the vehicles most prone to " +
"roll, drive faster because they feel like they're creeping along. " +
"So lower your seat to get the sensation of more speed.";
contentStyle = new android.support.v4.app.NotificationCompat.BigTextStyle();
contentStyle.bigText(msg);
contentStyle.setBigContentTitle("Lower Your Seat");
contentStyle.setSummaryText("AutoKit");
NotificationCompat.Builder builder;
builder = (NotificationCompat.Builder) new NotificationCompat.Builder(context)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("AutoKit")
.setContentText("Tip of the Day")
.setTicker("Daily Tip")
.setStyle(contentStyle)
.setSound(notifsound)
.setAutoCancel(true)
.setVibrate(pattern);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(1, builder.build());
}
}
这是在我的主活动中调用的方法，并将广播接收器绑定到警报管理器
public void setRepeatingAlarm(){ //user receives notifications every 24 hours at 7am
am = (AlarmManager)this.getSystemService(this.ALARM_SERVICE);
Intent intent = new Intent(this, TimeAlarm.class);
PendingIntent pi = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 07);
calendar.set(Calendar.MINUTE, 00);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 1000 * 60 * 60 * 24, pi);
}
修改通知
要设置通知以便更新，请通过调用 NotificationManager.notify(ID, notification) 向其发出通知 ID。要在发出通知后更新此通知，请更新或创建一个 NotificationCompat.Builder 对象，从中构建一个通知对象，然后使用您之前使用的相同 ID 发出通知。
以下代码片段演示了更新后的通知以反映已发生事件的数量。它堆叠通知，显示摘要：
mNotificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// Sets an ID for the notification, so it can be updated
int notifyID = 1;
mNotifyBuilder = new NotificationCompat.Builder(this)
.setContentTitle("New Message")
.setContentText("You've received new messages.")
.setSmallIcon(R.drawable.ic_notify_status)
numMessages = 0;
// Start of a loop that processes data and then notifies the user
...
mNotifyBuilder.setContentText(currentText)
.setNumber(++numMessages);
// Because the ID remains unchanged, the existing notification is
// updated.
mNotificationManager.notify(
notifyID,
mNotifyBuilder.build());
...
取自开发者网站。请参考，http://developer.android.com/training/notify-user/managing.html
这里是我在广播接收器中所做的更改 class。
public class TimeAlarm extends BroadcastReceiver {
NotificationManager nm;
long pattern[] = {500, 500};
private Uri notifsound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
private NotificationCompat.BigTextStyle contentStyle;
private List contentTexts, contentTitles;
@Override
public void onReceive(Context context, Intent intent) {
contentTexts = new ArrayList<String>();
contentTitles = new ArrayList<String>();
prepareContentTitles();
prepareContentTexts();
SharedPreferences prefs = context.getSharedPreferences("notification_count", context.MODE_PRIVATE);
int count = prefs.getInt("notification_count", 0);
contentStyle = new android.support.v4.app.NotificationCompat.BigTextStyle();
contentStyle.bigText((CharSequence) contentTexts.get(count));
contentStyle.setBigContentTitle((CharSequence) contentTitles.get(count));
contentStyle.setSummaryText("AutoKit");
NotificationCompat.Builder builder;
builder = (NotificationCompat.Builder) new NotificationCompat.Builder(context)
.setSmallIcon(R.mipmap.ic_launcher)
.setContentTitle("AutoKit")
.setContentText("Tip of the Day")
.setTicker("Daily Tip")
.setStyle(contentStyle)
.setSound(notifsound)
.setAutoCancel(true)
.setVibrate(pattern);
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(), PendingIntent.FLAG_UPDATE_CURRENT);
builder.setContentIntent(contentIntent);
nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(1, builder.build());
if (count == contentTexts.size() - 1) {
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("notification_count", 0);
editor.commit();
}
else {
SharedPreferences.Editor editor = prefs.edit();
editor.putInt("notification_count", count + 1);
editor.commit();
}
}
public void prepareContentTexts() {
contentTexts.add("Drivers who sit higher feel as if they're driving slower. " +
"Thus, SUV drivers, who are already piloting the vehicles most prone to " +
"roll, drive faster because they feel like they're creeping along. " +
"So lower your seat to get the sensation of more speed.");
contentTexts.add("Manufacturers recommend replacing your blades every three months. " +
"Keep a spare set in your trunk. A product such as Rain Clear can also help " +
"minimize the work of your wipers; spray it onto the glass every few weeks. " +
"In some light rains, it makes the wipers almost unnecessary");
contentTexts.add("At the BMW Performance Driving School, instructor Jim Clark says " +
"these four words over and over: \"Slow in, fast out.\" When taking a corner," +
" you need to scrub as much of that speed as you can while the car is braking" +
" in a straight line, then you can accelerate out of the curve. The converse " +
"is \"Fast in, maybe no out.\"");
}
public void prepareContentTitles() {
contentTitles.add("Lower Your Seat");
contentTitles.add("Rainproof Your Windshield");
contentTitles.add("Maneuver Tight Corners ");
}
}
通知每次触发时显示不同的内容文本