我在我的应用中使用了本地通知。用户每天都会收到通知。在7版以下的版本中，它工作正常，而在8.0版中则不能。
为什么正常通知生成器在Android O上不显示通知。
如何在Android 8 Oreo上显示通知？
是否需要添加新的代码以在Android O上显示通知？
这是我的Notification Service代码，该代码在android 7上有效，但在android 8上无效
public class NotificationService extends Service {
private static final String NOTIFICATION_DELETED_ACTION = "NOTIFICATION_DELETED";
boolean canceledNotification = false;
int imageId;
int largeImageId;
String lastCancelDate = "";
Methods methods = new Methods();
int notifyID = 1000;
private final BroadcastReceiver receiver = new C03671();
String title;
CalendarTool tool = new CalendarTool();
int updateMinutes = 0;
public void onReceive(Context context, Intent intent) {
Editor editor = PreferenceManager.getDefaultSharedPreferences(context).edit();
editor.putBoolean("CANCELED_NOTIFICATION", true);
editor.putString("CANCELED_DATE", NotificationService.this.methods.calendarToString(Calendar.getInstance(), Methods.DATEFORMAT));
editor.apply();
NotificationService.this.unregisterReceiver(this);
}
}
public IBinder onBind(Intent intent) {
return null;
}
@SuppressLint("WrongConstant")
public int onStartCommand(Intent intent, int flags, int startId) {
this.tool = new CalendarTool();
SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
boolean showNotification = sharedPref.getBoolean("SHOW_NOTIFICATION", true);
this.canceledNotification = sharedPref.getBoolean("CANCELED_NOTIFICATION", false);
this.lastCancelDate = sharedPref.getString("CANCELED_DATE", "");
this.updateMinutes = sharedPref.getInt("UPDATE_NOTIFICATION_MIN", 0);
if (showNotification) {
Bitmap bitmap;
this.title = this.methods.ReplaceNumber(this.tool.getJalaliStringLong());
this.imageId = getResources().getIdentifier("d" + String.valueOf(this.tool.getIranianDay()), "drawable", getPackageName());
this.largeImageId = getResources().getIdentifier("date" + String.valueOf(this.tool.getIranianDay()), "drawable", getPackageName());
if (VERSION.SDK_INT < 24) {
bitmap = this.methods.getFontBitmap(this, this.methods.ReplaceNumber(String.valueOf(this.tool.getIranianDay())), ContextCompat.getColor(this, R.color.colorPrimary), 50, "nazanin.ttf");
} else {
bitmap = BitmapFactory.decodeResource(getResources(), this.largeImageId);
}
int[] attrs = new int[]{16842904};
TypedArray titleStyle = obtainStyledAttributes(R.style.NotificationTitle, attrs);
TypedArray textStyle = obtainStyledAttributes(R.style.NotificationText, attrs);
int titleColor = titleStyle.getColor(0, ViewCompat.MEASURED_STATE_MASK);
int textColor = textStyle.getColor(0, -7829368);
RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.notification_layout);
contentView.setImageViewBitmap(R.id.notifImage, bitmap);
contentView.setImageViewBitmap(R.id.notifTitle, this.methods.getFontBitmap(this, this.title, titleColor, 16, "iranyekanregular.ttf"));
contentView.setImageViewBitmap(R.id.notifGregText, this.methods.getFontBitmap(this, this.methods.ReplaceNumber(this.tool.getGregorianStringFarsiShort()), textColor, 14, "iranyekanregular.ttf"));
contentView.setImageViewBitmap(R.id.notifLunarText, this.methods.getFontBitmap(this, this.methods.ReplaceNumber(this.tool.getLunarStringShort()), textColor, 14, "iranyekanregular.ttf"));
contentView.setImageViewBitmap(R.id.notifSpaceText, this.methods.getFontBitmap(this, " - ", textColor, 14, "iranyekanregular.ttf"));
titleStyle.recycle();
textStyle.recycle();
PendingIntent deletePendIntent;
NotificationManager mNotificationManager;
Intent intent2;
Builder mBuilder;
if (this.canceledNotification) {
Date lastDate = this.methods.StringDateToDate(this.lastCancelDate, Methods.DATEFORMAT);
Calendar lastCalendar = Calendar.getInstance();
lastCalendar.setTime(lastDate);
Calendar nowCalendar = Calendar.getInstance();
lastCalendar.add(12, this.updateMinutes);
if (nowCalendar.getTime().after(lastCalendar.getTime())) {
deletePendIntent = PendingIntent.getBroadcast(this, 0, new Intent(NOTIFICATION_DELETED_ACTION), 0);
registerReceiver(this.receiver, new IntentFilter(NOTIFICATION_DELETED_ACTION));
mNotificationManager = (NotificationManager) getSystemService("notification");
intent2 = new Intent(this, MainActivity.class);
intent2.setFlags(603979776);
mBuilder = new Builder(this).setSmallIcon(this.imageId).setContent(contentView).setDeleteIntent(deletePendIntent).setContentIntent(PendingIntent.getActivity(this, 0, intent2, 0));
if (this.updateMinutes == 0) {
mBuilder.setAutoCancel(false).setOngoing(true);
} else {
mBuilder.setAutoCancel(true);
}
mNotificationManager.notify(this.notifyID, mBuilder.build());
}
} else {
deletePendIntent = PendingIntent.getBroadcast(this, 0, new Intent(NOTIFICATION_DELETED_ACTION), 0);
registerReceiver(this.receiver, new IntentFilter(NOTIFICATION_DELETED_ACTION));
mNotificationManager = (NotificationManager) getSystemService("notification");
intent2 = new Intent(this, MainActivity.class);
intent2.setFlags(603979776);
mBuilder = new Builder(this).setSmallIcon(this.imageId).setContent(contentView).setDeleteIntent(deletePendIntent).setContentIntent(PendingIntent.getActivity(this, 0, intent2, 0));
if (this.updateMinutes == 0) {
mBuilder.setAutoCancel(false).setOngoing(true);
} else {
mBuilder.setAutoCancel(true);
}
mNotificationManager.notify(this.notifyID, mBuilder.build());
}
}
return 1;
}
}
答案 0 :(得分：-1)
与版本> = 8.0一样，更新了秀场通知，您必须按以下方式定义频道
String CHANNEL_ID = "my_channel_01"; // The id of the channel.
然后将通道ID用于通知生成器
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "01")
.setContentTitle(title)
.setSmallIcon(R.mipmap.ic_notification)
.setStyle(new NotificationCompat.BigTextStyle()
.bigText(message))
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setChannelId(CHANNEL_ID)
.setContentIntent(pendingIntent);
然后添加下面的版本> = 8.0的代码
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { // For Oreo and greater than it, we required Notification Channel.
CharSequence name = "My New Channel"; // The user-visible name of the channel.
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel channel = new NotificationChannel(CHANNEL_ID,name, importance); //Create Notification Channel
notificationManager.createNotificationChannel(channel);
}
notificationManager.notify(notifyID /* ID of notification */, notificationBuilder.build());
我希望，这将帮助您在状态=> 8.0的状态栏中显示通知