post 通知通道空日志失败？
Failed to post notification channel null log?
朋友们，我是 android 的初学者 我在我的项目中使用了一些 GitHub 代码 我的问题是我正在构建警报管理器应用程序，它的通知在 8.0 oreo 设备以下完美运行但问题在奥利奥上它通知给了我这个例外
未能post 频道 null
上的通知
我知道我需要再创建一个频道，但不知道如何为这个频道编码，这是我的代码吗？
package bible.swordof.God.notification;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.os.IBinder;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;
import bible.swordof.God.MainActivity;
import bible.swordof.God.R;
import bible.swordof.God.Reminder;
import bible.swordof.God.ReminderAdapter;
import bible.swordof.God.ReminderEntity;
import bible.swordof.God.database.ReminderDatabaseHelper;
import bible.swordof.God.database.ReminderDatabaseManager;
public class NotificationService extends Service {
public final static String KEY = "key";
public final static String TITLE = "title";
public final static String REPEAT_INTERVAL = "repeatInterval";
public final static String REPEAT_INTERVAL_NUMBER = "repeatIntervalNumber";
public final static String DATE = "date";
public final static String PRIORITY = "priority";
public final static String SERVICE = "service";
int NOTIFICATION_ID = 234;
private Context context;
private Intent intent;
private Timer timer;
private NotificationTimerTask notificationTimerTask;
private SharedPreferences sharedPreferences;
private Ringtone ringtone;
private Uri ringtoneUri;
private Vibrator vibrator;
private boolean isVibration;
private boolean isRingtone;
private String repeatNumberKey, repeatIntervalKey;
@Override
public void onCreate() {
context = getApplicationContext();
vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
timer = new Timer();
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
this.intent = intent;
sendNotification();
// The repeatNumber is the number of notification ringtone and (or) vibration repeats the
// user has set in the app preferences. The default value is -1 (infinite repeats)
int repeatNumber = Integer.parseInt(sharedPreferences.getString(repeatNumberKey, "-1"));
if ((isRingtone || isVibration) && repeatNumber != 0) {
// The repeatInterval is the repeat interval between two subsequent notification signals.
// The default value is 5 (five seconds).
int repeatInterval = Integer.parseInt(sharedPreferences.getString(repeatIntervalKey, "5")) * 1000;
startNotificationTimerTask(repeatNumber, repeatInterval);
} else if (notificationTimerTask == null) {
stopSelf();
}
return super.onStartCommand(intent, flags, startId);
}
private void startNotificationTimerTask(int repeatNumber, int repeatInterval) {
if (notificationTimerTask != null) {
if (ringtone != null) {
ringtone.stop();
}
if (isVibration) {
vibrator.cancel();
}
notificationTimerTask.cancel();
}
if (isRingtone) {
ringtone = RingtoneManager.getRingtone(this, ringtoneUri);
ringtone.setStreamType(AudioManager.STREAM_NOTIFICATION);
}
notificationTimerTask = new NotificationTimerTask(repeatNumber);
timer.schedule(notificationTimerTask, repeatInterval, repeatInterval);
}
private class NotificationTimerTask extends TimerTask {
long repeatNumber;
NotificationTimerTask(int repeatNumber) {
this.repeatNumber = repeatNumber;
}
@Override
public void run() {
if (repeatNumber-- != 0) {
if (isRingtone) {
ringtone.play();
}
if (isVibration) {
vibrator.vibrate(1500);
}
} else {
cancel();
stopSelf();
}
}
}
// This method creates and sends the notification
private void sendNotification() {
final long key = intent.getLongExtra(KEY, 0);
String contentText = intent.getStringExtra(TITLE);
long date = intent.getLongExtra(DATE, 0L);
int repeatIntervalNumber = intent.getIntExtra(REPEAT_INTERVAL_NUMBER, 1);
int priority = intent.getIntExtra(PRIORITY, ReminderEntity.PRIORITY_NORMAL);
String ringtoneKey, vibrationKey;
Bitmap largeIcon;
switch (priority) {
case ReminderEntity.PRIORITY_NORMAL:
default:
ringtoneKey = getString(R.string.pref_normal_priority_ringtone_key);
vibrationKey = getString(R.string.pref_normal_priority_vibration_key);
repeatNumberKey = getString(R.string.pref_normal_priority_repeat_number_key);
repeatIntervalKey = getString(R.string.pref_normal_priority_repeat_interval_key);
largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_alarm_green_48dp);
break;
case ReminderEntity.PRIORITY_HIGH:
ringtoneKey = getString(R.string.pref_high_priority_ringtone_key);
vibrationKey = getString(R.string.pref_high_priority_vibration_key);
repeatNumberKey = getString(R.string.pref_high_priority_repeat_number_key);
repeatIntervalKey = getString(R.string.pref_high_priority_repeat_interval_key);
largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_alarm_red_48dp);
break;
}
AlarmHelper.init(context);
// Create an identifier to make a unique PendingIntent
Uri identifier = Uri.parse(AlarmHelper.FAKE + String.valueOf(key));
Intent resultIntent = new Intent(context, Reminder.class);
resultIntent.setData(identifier);
resultIntent.putExtra(KEY, key);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
Intent deleteIntent = new Intent(context, AlarmReceiver.class);
deleteIntent.putExtra(SERVICE, true);
deleteIntent.setData(identifier);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
PendingIntent deletePendingIntent = PendingIntent.getBroadcast(context, 1,
deleteIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
NotificationManager notification= (NotificationManager) getApplication().getSystemService(Context.NOTIFICATION_SERVICE);
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
String uriString = sharedPreferences.getString(ringtoneKey, "content://settings/system/notification_sound");
isRingtone = !"".equals(uriString);
ringtoneUri = Uri.parse(uriString);
builder.setSound(ringtoneUri);
builder.setContentTitle("PRAYER TIMES");
builder.setContentText(contentText);
builder.setTicker(contentText);
builder.setSmallIcon(R.drawable.ic_alarm_white_48dp);
builder.setLargeIcon(largeIcon);
builder.setContentIntent(pendingIntent);
builder.setAutoCancel(true);
builder.setDeleteIntent(deletePendingIntent);
int defaultFlags = Notification.DEFAULT_LIGHTS;
isVibration = vibrator.hasVibrator() && sharedPreferences.getBoolean(vibrationKey, true);
if (!isVibration) {
builder.setVibrate(null);
} else {
defaultFlags |= Notification.DEFAULT_VIBRATE;
}
builder.setDefaults(defaultFlags);
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify((int) key, builder.build());
setRepeat(date, repeatIntervalNumber, key, contentText, priority);
}
// This method sets the next alarm if necessary using the AlarmHelper.
private void setRepeat(long date, int repeatIntervalNumber,
final long key, String title, int priority) {
ReminderDatabaseHelper.init(context);
int repeatInterval = ReminderDatabaseManager.getInstance().getRepeatIntervalByKey(key);
if (repeatInterval != ReminderEntity.NO_REPEATS) {
Calendar calendar = Calendar.getInstance();
switch (repeatInterval) {
case 5:
repeatInterval = Calendar.YEAR;
break;
case 4:
repeatInterval = Calendar.MONTH;
break;
case 3:
repeatInterval = Calendar.WEEK_OF_MONTH;
break;
case 2:
repeatInterval = Calendar.DAY_OF_MONTH;
break;
case 1:
repeatInterval = Calendar.HOUR_OF_DAY;
break;
case 0:
default:
repeatInterval = Calendar.MINUTE;
}
calendar.setTimeInMillis(date);
calendar.add(repeatInterval, repeatIntervalNumber);
final long nextDate = calendar.getTimeInMillis();
ReminderDatabaseManager.getInstance().updateDate(key, nextDate);
AlarmHelper.getInstance().setAlarm(new ReminderEntity(
key, title, nextDate,
priority, 0, 0, repeatInterval, repeatIntervalNumber
));
final ReminderAdapter reminderAdapter = AlarmHelper.getInstance().getReminderAdapter();
// If the app is opened set next date using setNextDate method.
if (reminderAdapter != null) {
Handler mainHandler = new Handler(context.getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
reminderAdapter.setNextDate(key, nextDate);
}
});
}
} else {
ReminderDatabaseManager manager = ReminderDatabaseManager.getInstance();
manager.updateStatus(key, ReminderEntity.STATUS_INACTIVE);
final ReminderAdapter reminderAdapter = AlarmHelper.getInstance().getReminderAdapter();
// If the app is opened deactivate the reminder using deactivateReminder method.
if (reminderAdapter != null) {
Handler mainHandler = new Handler(context.getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
reminderAdapter.deactivateReminder(key);
}
});
}
}
}
@Override
public void onDestroy() {
if (ringtone != null) {
ringtone.stop();
}
if (isVibration) {
vibrator.cancel();
}
if (timer != null) {
timer.cancel();
}
AlarmReceiver.completeWakefulIntent(intent);
super.onDestroy();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
public static final String NOTIFICATION_CHANNEL_ID = "10001";
mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
{
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", importance);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.enableVibration(true);
notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
assert mNotificationManager != null;
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
mNotificationManager.createNotificationChannel(notificationChannel);
}
您必须先创建通知渠道（API 26+），然后将渠道 ID 传递给 NotificationCompat.Builder(context, channelId)（26 岁以下为 null）：
// Create the notification channel
String channelId = null;
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (notificationManager != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
channelId = "YOUR_DESIRED_CHANNEL_ID";
NotificationChannel channel = notificationManager.getNotificationChannel(channelId);
String channelName = "A user-visible name for the channel";
if (channel == null) { // if not created yet
channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT);
// Setup your channel config as you wish
channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PRIVATE);
// Create the channel
notificationManager.createNotificationChannel(channel);
}
}
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channelId);
// Setup your notification and notify
朋友们，我是 android 的初学者 我在我的项目中使用了一些 GitHub 代码 我的问题是我正在构建警报管理器应用程序，它的通知在 8.0 oreo 设备以下完美运行但问题在奥利奥上它通知给了我这个例外
未能post 频道 null
上的通知我知道我需要再创建一个频道，但不知道如何为这个频道编码，这是我的代码吗？
package bible.swordof.God.notification;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.AudioManager;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Handler;
import android.os.IBinder;
import android.os.Vibrator;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.support.v4.app.NotificationCompat;
import java.util.Calendar;
import java.util.Timer;
import java.util.TimerTask;
import bible.swordof.God.MainActivity;
import bible.swordof.God.R;
import bible.swordof.God.Reminder;
import bible.swordof.God.ReminderAdapter;
import bible.swordof.God.ReminderEntity;
import bible.swordof.God.database.ReminderDatabaseHelper;
import bible.swordof.God.database.ReminderDatabaseManager;
public class NotificationService extends Service {
public final static String KEY = "key";
public final static String TITLE = "title";
public final static String REPEAT_INTERVAL = "repeatInterval";
public final static String REPEAT_INTERVAL_NUMBER = "repeatIntervalNumber";
public final static String DATE = "date";
public final static String PRIORITY = "priority";
public final static String SERVICE = "service";
int NOTIFICATION_ID = 234;
private Context context;
private Intent intent;
private Timer timer;
private NotificationTimerTask notificationTimerTask;
private SharedPreferences sharedPreferences;
private Ringtone ringtone;
private Uri ringtoneUri;
private Vibrator vibrator;
private boolean isVibration;
private boolean isRingtone;
private String repeatNumberKey, repeatIntervalKey;
@Override
public void onCreate() {
context = getApplicationContext();
vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
timer = new Timer();
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
this.intent = intent;
sendNotification();
// The repeatNumber is the number of notification ringtone and (or) vibration repeats the
// user has set in the app preferences. The default value is -1 (infinite repeats)
int repeatNumber = Integer.parseInt(sharedPreferences.getString(repeatNumberKey, "-1"));
if ((isRingtone || isVibration) && repeatNumber != 0) {
// The repeatInterval is the repeat interval between two subsequent notification signals.
// The default value is 5 (five seconds).
int repeatInterval = Integer.parseInt(sharedPreferences.getString(repeatIntervalKey, "5")) * 1000;
startNotificationTimerTask(repeatNumber, repeatInterval);
} else if (notificationTimerTask == null) {
stopSelf();
}
return super.onStartCommand(intent, flags, startId);
}
private void startNotificationTimerTask(int repeatNumber, int repeatInterval) {
if (notificationTimerTask != null) {
if (ringtone != null) {
ringtone.stop();
}
if (isVibration) {
vibrator.cancel();
}
notificationTimerTask.cancel();
}
if (isRingtone) {
ringtone = RingtoneManager.getRingtone(this, ringtoneUri);
ringtone.setStreamType(AudioManager.STREAM_NOTIFICATION);
}
notificationTimerTask = new NotificationTimerTask(repeatNumber);
timer.schedule(notificationTimerTask, repeatInterval, repeatInterval);
}
private class NotificationTimerTask extends TimerTask {
long repeatNumber;
NotificationTimerTask(int repeatNumber) {
this.repeatNumber = repeatNumber;
}
@Override
public void run() {
if (repeatNumber-- != 0) {
if (isRingtone) {
ringtone.play();
}
if (isVibration) {
vibrator.vibrate(1500);
}
} else {
cancel();
stopSelf();
}
}
}
// This method creates and sends the notification
private void sendNotification() {
final long key = intent.getLongExtra(KEY, 0);
String contentText = intent.getStringExtra(TITLE);
long date = intent.getLongExtra(DATE, 0L);
int repeatIntervalNumber = intent.getIntExtra(REPEAT_INTERVAL_NUMBER, 1);
int priority = intent.getIntExtra(PRIORITY, ReminderEntity.PRIORITY_NORMAL);
String ringtoneKey, vibrationKey;
Bitmap largeIcon;
switch (priority) {
case ReminderEntity.PRIORITY_NORMAL:
default:
ringtoneKey = getString(R.string.pref_normal_priority_ringtone_key);
vibrationKey = getString(R.string.pref_normal_priority_vibration_key);
repeatNumberKey = getString(R.string.pref_normal_priority_repeat_number_key);
repeatIntervalKey = getString(R.string.pref_normal_priority_repeat_interval_key);
largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_alarm_green_48dp);
break;
case ReminderEntity.PRIORITY_HIGH:
ringtoneKey = getString(R.string.pref_high_priority_ringtone_key);
vibrationKey = getString(R.string.pref_high_priority_vibration_key);
repeatNumberKey = getString(R.string.pref_high_priority_repeat_number_key);
repeatIntervalKey = getString(R.string.pref_high_priority_repeat_interval_key);
largeIcon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_alarm_red_48dp);
break;
}
AlarmHelper.init(context);
// Create an identifier to make a unique PendingIntent
Uri identifier = Uri.parse(AlarmHelper.FAKE + String.valueOf(key));
Intent resultIntent = new Intent(context, Reminder.class);
resultIntent.setData(identifier);
resultIntent.putExtra(KEY, key);
resultIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
Intent deleteIntent = new Intent(context, AlarmReceiver.class);
deleteIntent.putExtra(SERVICE, true);
deleteIntent.setData(identifier);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, resultIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
PendingIntent deletePendingIntent = PendingIntent.getBroadcast(context, 1,
deleteIntent, PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
NotificationManager notification= (NotificationManager) getApplication().getSystemService(Context.NOTIFICATION_SERVICE);
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
String uriString = sharedPreferences.getString(ringtoneKey, "content://settings/system/notification_sound");
isRingtone = !"".equals(uriString);
ringtoneUri = Uri.parse(uriString);
builder.setSound(ringtoneUri);
builder.setContentTitle("PRAYER TIMES");
builder.setContentText(contentText);
builder.setTicker(contentText);
builder.setSmallIcon(R.drawable.ic_alarm_white_48dp);
builder.setLargeIcon(largeIcon);
builder.setContentIntent(pendingIntent);
builder.setAutoCancel(true);
builder.setDeleteIntent(deletePendingIntent);
int defaultFlags = Notification.DEFAULT_LIGHTS;
isVibration = vibrator.hasVibrator() && sharedPreferences.getBoolean(vibrationKey, true);
if (!isVibration) {
builder.setVibrate(null);
} else {
defaultFlags |= Notification.DEFAULT_VIBRATE;
}
builder.setDefaults(defaultFlags);
NotificationManager notificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify((int) key, builder.build());
setRepeat(date, repeatIntervalNumber, key, contentText, priority);
}
// This method sets the next alarm if necessary using the AlarmHelper.
private void setRepeat(long date, int repeatIntervalNumber,
final long key, String title, int priority) {
ReminderDatabaseHelper.init(context);
int repeatInterval = ReminderDatabaseManager.getInstance().getRepeatIntervalByKey(key);
if (repeatInterval != ReminderEntity.NO_REPEATS) {
Calendar calendar = Calendar.getInstance();
switch (repeatInterval) {
case 5:
repeatInterval = Calendar.YEAR;
break;
case 4:
repeatInterval = Calendar.MONTH;
break;
case 3:
repeatInterval = Calendar.WEEK_OF_MONTH;
break;
case 2:
repeatInterval = Calendar.DAY_OF_MONTH;
break;
case 1:
repeatInterval = Calendar.HOUR_OF_DAY;
break;
case 0:
default:
repeatInterval = Calendar.MINUTE;
}
calendar.setTimeInMillis(date);
calendar.add(repeatInterval, repeatIntervalNumber);
final long nextDate = calendar.getTimeInMillis();
ReminderDatabaseManager.getInstance().updateDate(key, nextDate);
AlarmHelper.getInstance().setAlarm(new ReminderEntity(
key, title, nextDate,
priority, 0, 0, repeatInterval, repeatIntervalNumber
));
final ReminderAdapter reminderAdapter = AlarmHelper.getInstance().getReminderAdapter();
// If the app is opened set next date using setNextDate method.
if (reminderAdapter != null) {
Handler mainHandler = new Handler(context.getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
reminderAdapter.setNextDate(key, nextDate);
}
});
}
} else {
ReminderDatabaseManager manager = ReminderDatabaseManager.getInstance();
manager.updateStatus(key, ReminderEntity.STATUS_INACTIVE);
final ReminderAdapter reminderAdapter = AlarmHelper.getInstance().getReminderAdapter();
// If the app is opened deactivate the reminder using deactivateReminder method.
if (reminderAdapter != null) {
Handler mainHandler = new Handler(context.getMainLooper());
mainHandler.post(new Runnable() {
@Override
public void run() {
reminderAdapter.deactivateReminder(key);
}
});
}
}
}
@Override
public void onDestroy() {
if (ringtone != null) {
ringtone.stop();
}
if (isVibration) {
vibrator.cancel();
}
if (timer != null) {
timer.cancel();
}
AlarmReceiver.completeWakefulIntent(intent);
super.onDestroy();
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
public static final String NOTIFICATION_CHANNEL_ID = "10001";
mNotificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O)
{
int importance = NotificationManager.IMPORTANCE_HIGH;
NotificationChannel notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "NOTIFICATION_CHANNEL_NAME", importance);
notificationChannel.enableLights(true);
notificationChannel.setLightColor(Color.RED);
notificationChannel.enableVibration(true);
notificationChannel.setVibrationPattern(new long[]{100, 200, 300, 400, 500, 400, 300, 200, 400});
assert mNotificationManager != null;
mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
mNotificationManager.createNotificationChannel(notificationChannel);
}
您必须先创建通知渠道（API 26+），然后将渠道 ID 传递给 NotificationCompat.Builder(context, channelId)（26 岁以下为 null）：
// Create the notification channel
String channelId = null;
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
if (notificationManager != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
channelId = "YOUR_DESIRED_CHANNEL_ID";
NotificationChannel channel = notificationManager.getNotificationChannel(channelId);
String channelName = "A user-visible name for the channel";
if (channel == null) { // if not created yet
channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT);
// Setup your channel config as you wish
channel.setLockscreenVisibility(NotificationCompat.VISIBILITY_PRIVATE);
// Create the channel
notificationManager.createNotificationChannel(channel);
}
}
NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channelId);
// Setup your notification and notify