packages/PrintSpooler/src/com/android/printspooler/model/NotificationController.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.printspooler.model;

 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.app.Notification;
 import android.app.Notification.Action;
 import android.app.Notification.InboxStyle;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Icon;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.PowerManager;
 import android.os.PowerManager.WakeLock;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.print.IPrintManager;
 import android.print.PrintJobId;
 import android.print.PrintJobInfo;
 import android.print.PrintManager;
 import android.provider.Settings;
 import android.util.ArraySet;
 import android.util.Log;

 import com.android.printspooler.R;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * This class is responsible for updating the print notifications
  * based on print job state transitions.
  */
 final class NotificationController {
     public static final boolean DEBUG = false;

     public static final String LOG_TAG = "NotificationController";

     private static final String INTENT_ACTION_CANCEL_PRINTJOB = "INTENT_ACTION_CANCEL_PRINTJOB";
     private static final String INTENT_ACTION_RESTART_PRINTJOB = "INTENT_ACTION_RESTART_PRINTJOB";

     private static final String EXTRA_PRINT_JOB_ID = "EXTRA_PRINT_JOB_ID";

     private static final String PRINT_JOB_NOTIFICATION_GROUP_KEY = "PRINT_JOB_NOTIFICATIONS";
     private static final String PRINT_JOB_NOTIFICATION_SUMMARY = "PRINT_JOB_NOTIFICATIONS_SUMMARY";

     private final Context mContext;
     private final NotificationManager mNotificationManager;

     /**
      * Mapping from printJobIds to their notification Ids.
      */
     private final ArraySet<PrintJobId> mNotifications;

     public NotificationController(Context context) {
         mContext = context;
         mNotificationManager = (NotificationManager)
                 mContext.getSystemService(Context.NOTIFICATION_SERVICE);
         mNotifications = new ArraySet<>(0);
     }

     public void onUpdateNotifications(List<PrintJobInfo> printJobs) {
         List<PrintJobInfo> notifyPrintJobs = new ArrayList<>();

         final int printJobCount = printJobs.size();
         for (int i = 0; i < printJobCount; i++) {
             PrintJobInfo printJob = printJobs.get(i);
             if (shouldNotifyForState(printJob.getState())) {
                 notifyPrintJobs.add(printJob);
             }
         }

         updateNotifications(notifyPrintJobs);
     }

     /**
      * Update notifications for the given print jobs, remove all other notifications.
      *
      * @param printJobs The print job that we want to create notifications for.
      */
     private void updateNotifications(List<PrintJobInfo> printJobs) {
         ArraySet<PrintJobId> removedPrintJobs = new ArraySet<>(mNotifications);

         final int numPrintJobs = printJobs.size();

         // Create summary notification
         if (numPrintJobs > 1) {
             createStackedNotification(printJobs);
         } else {
             mNotificationManager.cancel(PRINT_JOB_NOTIFICATION_SUMMARY, 0);
         }

         // Create per print job notification
         for (int i = 0; i < numPrintJobs; i++) {
             PrintJobInfo printJob = printJobs.get(i);
             PrintJobId printJobId = printJob.getId();

             removedPrintJobs.remove(printJobId);
             mNotifications.add(printJobId);

             createSimpleNotification(printJob);
         }

         // Remove notifications for print jobs that do not exist anymore
         final int numRemovedPrintJobs = removedPrintJobs.size();
         for (int i = 0; i < numRemovedPrintJobs; i++) {
             PrintJobId removedPrintJob = removedPrintJobs.valueAt(i);

             mNotificationManager.cancel(removedPrintJob.flattenToString(), 0);
             mNotifications.remove(removedPrintJob);
         }
     }

     private void createSimpleNotification(PrintJobInfo printJob) {
         switch (printJob.getState()) {
             case PrintJobInfo.STATE_FAILED: {
                 createFailedNotification(printJob);
             } break;

             case PrintJobInfo.STATE_BLOCKED: {
                 if (!printJob.isCancelling()) {
                     createBlockedNotification(printJob);
                 } else {
                     createCancellingNotification(printJob);
                 }
             } break;

             default: {
                 if (!printJob.isCancelling()) {
                     createPrintingNotification(printJob);
                 } else {
                     createCancellingNotification(printJob);
                 }
             } break;
         }
     }

     /**
      * Create an {@link Action} that cancels a {@link PrintJobInfo print job}.
      *
      * @param printJob The {@link PrintJobInfo print job} to cancel
      *
      * @return An {@link Action} that will cancel a print job
      */
     private Action createCancelAction(PrintJobInfo printJob) {
         return new Action.Builder(
                 Icon.createWithResource(mContext, R.drawable.stat_notify_cancelling),
                 mContext.getString(R.string.cancel), createCancelIntent(printJob)).build();
     }

     /**
      * Create a notification for a print job.
      *
      * @param printJob the job the notification is for
      * @param firstAction the first action shown in the notification
      * @param secondAction the second action shown in the notification
      */
     private void createNotification(@NonNull PrintJobInfo printJob, @Nullable Action firstAction,
             @Nullable Action secondAction) {
         Notification.Builder builder = new Notification.Builder(mContext)
                 .setContentIntent(createContentIntent(printJob.getId()))
                 .setSmallIcon(computeNotificationIcon(printJob))
                 .setContentTitle(computeNotificationTitle(printJob))
                 .setWhen(System.currentTimeMillis())
                 .setOngoing(true)
                 .setShowWhen(true)
                 .setColor(mContext.getColor(
                         com.android.internal.R.color.system_notification_accent_color))
                 .setGroup(PRINT_JOB_NOTIFICATION_GROUP_KEY);

         if (firstAction != null) {
             builder.addAction(firstAction);
         }

         if (secondAction != null) {
             builder.addAction(secondAction);
         }

         if (printJob.getState() == PrintJobInfo.STATE_STARTED
                 || printJob.getState() == PrintJobInfo.STATE_QUEUED) {
             float progress = printJob.getProgress();
             if (progress >= 0) {
                 builder.setProgress(Integer.MAX_VALUE, (int) (Integer.MAX_VALUE * progress),
                         false);
             } else {
                 builder.setProgress(Integer.MAX_VALUE, 0, true);
             }
         }

         CharSequence status = printJob.getStatus();
         if (status != null) {
             builder.setContentText(status);
         } else {
             builder.setContentText(printJob.getPrinterName());
         }

         mNotificationManager.notify(printJob.getId().flattenToString(), 0, builder.build());
     }

     private void createPrintingNotification(PrintJobInfo printJob) {
         createNotification(printJob, createCancelAction(printJob), null);
     }

     private void createFailedNotification(PrintJobInfo printJob) {
         Action.Builder restartActionBuilder = new Action.Builder(
                 Icon.createWithResource(mContext, R.drawable.ic_restart),
                 mContext.getString(R.string.restart), createRestartIntent(printJob.getId()));

         createNotification(printJob, createCancelAction(printJob), restartActionBuilder.build());
     }

     private void createBlockedNotification(PrintJobInfo printJob) {
         createNotification(printJob, createCancelAction(printJob), null);
     }

     private void createCancellingNotification(PrintJobInfo printJob) {
         createNotification(printJob, null, null);
     }

     private void createStackedNotification(List<PrintJobInfo> printJobs) {
         Notification.Builder builder = new Notification.Builder(mContext)
                 .setContentIntent(createContentIntent(null))
                 .setWhen(System.currentTimeMillis())
                 .setOngoing(true)
                 .setShowWhen(true)
                 .setGroup(PRINT_JOB_NOTIFICATION_GROUP_KEY)
                 .setGroupSummary(true);

         final int printJobCount = printJobs.size();

         InboxStyle inboxStyle = new InboxStyle();

         int icon = com.android.internal.R.drawable.ic_print;
         for (int i = printJobCount - 1; i>= 0; i--) {
             PrintJobInfo printJob = printJobs.get(i);

             inboxStyle.addLine(computeNotificationTitle(printJob));

             // if any print job is in an error state show an error icon for the summary
             if (printJob.getState() == PrintJobInfo.STATE_FAILED
                     || printJob.getState() == PrintJobInfo.STATE_BLOCKED) {
                 icon = com.android.internal.R.drawable.ic_print_error;
             }
         }

         builder.setSmallIcon(icon);
         builder.setLargeIcon(
                 ((BitmapDrawable) mContext.getResources().getDrawable(icon, null)).getBitmap());
         builder.setNumber(printJobCount);
         builder.setStyle(inboxStyle);
         builder.setColor(mContext.getColor(
                 com.android.internal.R.color.system_notification_accent_color));

         mNotificationManager.notify(PRINT_JOB_NOTIFICATION_SUMMARY, 0, builder.build());
     }

     private String computeNotificationTitle(PrintJobInfo printJob) {
         switch (printJob.getState()) {
             case PrintJobInfo.STATE_FAILED: {
                 return mContext.getString(R.string.failed_notification_title_template,
                         printJob.getLabel());
             }

             case PrintJobInfo.STATE_BLOCKED: {
                 if (!printJob.isCancelling()) {
                     return mContext.getString(R.string.blocked_notification_title_template,
                             printJob.getLabel());
                 } else {
                     return mContext.getString(
                             R.string.cancelling_notification_title_template,
                             printJob.getLabel());
                 }
             }

             default: {
                 if (!printJob.isCancelling()) {
                     return mContext.getString(R.string.printing_notification_title_template,
                             printJob.getLabel());
                 } else {
                     return mContext.getString(
                             R.string.cancelling_notification_title_template,
                             printJob.getLabel());
                 }
             }
         }
     }

     private PendingIntent createContentIntent(PrintJobId printJobId) {
         Intent intent = new Intent(Settings.ACTION_PRINT_SETTINGS);
         if (printJobId != null) {
             intent.putExtra(EXTRA_PRINT_JOB_ID, printJobId.flattenToString());
             intent.setData(Uri.fromParts("printjob", printJobId.flattenToString(), null));
         }
         return PendingIntent.getActivity(mContext, 0, intent, 0);
     }

     private PendingIntent createCancelIntent(PrintJobInfo printJob) {
         Intent intent = new Intent(mContext, NotificationBroadcastReceiver.class);
         intent.setAction(INTENT_ACTION_CANCEL_PRINTJOB + "_" + printJob.getId().flattenToString());
         intent.putExtra(EXTRA_PRINT_JOB_ID, printJob.getId());
         return PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT);
     }

     private PendingIntent createRestartIntent(PrintJobId printJobId) {
         Intent intent = new Intent(mContext, NotificationBroadcastReceiver.class);
         intent.setAction(INTENT_ACTION_RESTART_PRINTJOB + "_" + printJobId.flattenToString());
         intent.putExtra(EXTRA_PRINT_JOB_ID, printJobId);
         return PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT);
     }

     private static boolean shouldNotifyForState(int state) {
         switch (state) {
             case PrintJobInfo.STATE_QUEUED:
             case PrintJobInfo.STATE_STARTED:
             case PrintJobInfo.STATE_FAILED:
             case PrintJobInfo.STATE_COMPLETED:
             case PrintJobInfo.STATE_CANCELED:
             case PrintJobInfo.STATE_BLOCKED: {
                 return true;
             }
         }
         return false;
     }

     private static int computeNotificationIcon(PrintJobInfo printJob) {
         switch (printJob.getState()) {
             case PrintJobInfo.STATE_FAILED:
             case PrintJobInfo.STATE_BLOCKED: {
                 return com.android.internal.R.drawable.ic_print_error;
             }
             default: {
                 if (!printJob.isCancelling()) {
                     return com.android.internal.R.drawable.ic_print;
                 } else {
                     return R.drawable.stat_notify_cancelling;
                 }
             }
         }
     }

     public static final class NotificationBroadcastReceiver extends BroadcastReceiver {
         @SuppressWarnings("hiding")
         private static final String LOG_TAG = "NotificationBroadcastReceiver";

         @Override
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
             if (action != null && action.startsWith(INTENT_ACTION_CANCEL_PRINTJOB)) {
                 PrintJobId printJobId = intent.getExtras().getParcelable(EXTRA_PRINT_JOB_ID);
                 handleCancelPrintJob(context, printJobId);
             } else if (action != null && action.startsWith(INTENT_ACTION_RESTART_PRINTJOB)) {
                 PrintJobId printJobId = intent.getExtras().getParcelable(EXTRA_PRINT_JOB_ID);
                 handleRestartPrintJob(context, printJobId);
             }
         }

         private void handleCancelPrintJob(final Context context, final PrintJobId printJobId) {
             if (DEBUG) {
                 Log.i(LOG_TAG, "handleCancelPrintJob() printJobId:" + printJobId);
             }

             // Call into the print manager service off the main thread since
             // the print manager service may end up binding to the print spooler
             // service which binding is handled on the main thread.
             PowerManager powerManager = (PowerManager)
                     context.getSystemService(Context.POWER_SERVICE);
             final WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                     LOG_TAG);
             wakeLock.acquire();

             new AsyncTask<Void, Void, Void>() {
                 @Override
                 protected Void doInBackground(Void... params) {
                     // We need to request the cancellation to be done by the print
                     // manager service since it has to communicate with the managing
                     // print service to request the cancellation. Also we need the
                     // system service to be bound to the spooler since canceling a
                     // print job will trigger persistence of current jobs which is
                     // done on another thread and until it finishes the spooler has
                     // to be kept around.
                     try {
                         IPrintManager printManager = IPrintManager.Stub.asInterface(
                                 ServiceManager.getService(Context.PRINT_SERVICE));
                         printManager.cancelPrintJob(printJobId, PrintManager.APP_ID_ANY,
                                 UserHandle.myUserId());
                     } catch (RemoteException re) {
                         Log.i(LOG_TAG, "Error requesting print job cancellation", re);
                     } finally {
                         wakeLock.release();
                     }
                     return null;
                 }
             }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
         }

         private void handleRestartPrintJob(final Context context, final PrintJobId printJobId) {
             if (DEBUG) {
                 Log.i(LOG_TAG, "handleRestartPrintJob() printJobId:" + printJobId);
             }

             // Call into the print manager service off the main thread since
             // the print manager service may end up binding to the print spooler
             // service which binding is handled on the main thread.
             PowerManager powerManager = (PowerManager)
                     context.getSystemService(Context.POWER_SERVICE);
             final WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                     LOG_TAG);
             wakeLock.acquire();

             new AsyncTask<Void, Void, Void>() {
                 @Override
                 protected Void doInBackground(Void... params) {
                     // We need to request the restart to be done by the print manager
                     // service since the latter must be bound to the spooler because
                     // restarting a print job will trigger persistence of current jobs
                     // which is done on another thread and until it finishes the spooler has
                     // to be kept around.
                     try {
                         IPrintManager printManager = IPrintManager.Stub.asInterface(
                                 ServiceManager.getService(Context.PRINT_SERVICE));
                         printManager.restartPrintJob(printJobId, PrintManager.APP_ID_ANY,
                                 UserHandle.myUserId());
                     } catch (RemoteException re) {
                         Log.i(LOG_TAG, "Error requesting print job restart", re);
                     } finally {
                         wakeLock.release();
                     }
                     return null;
                 }
             }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
         }
     }
 }
	/*
	* Copyright (C) 2013 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.printspooler.model;

	import android.annotation.NonNull;
	import android.annotation.Nullable;
	import android.app.Notification;
	import android.app.Notification.Action;
	import android.app.Notification.InboxStyle;
	import android.app.NotificationManager;
	import android.app.PendingIntent;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.graphics.drawable.BitmapDrawable;
	import android.graphics.drawable.Icon;
	import android.net.Uri;
	import android.os.AsyncTask;
	import android.os.PowerManager;
	import android.os.PowerManager.WakeLock;
	import android.os.RemoteException;
	import android.os.ServiceManager;
	import android.os.UserHandle;
	import android.print.IPrintManager;
	import android.print.PrintJobId;
	import android.print.PrintJobInfo;
	import android.print.PrintManager;
	import android.provider.Settings;
	import android.util.ArraySet;
	import android.util.Log;

	import com.android.printspooler.R;

	import java.util.ArrayList;
	import java.util.List;

	/**
	* This class is responsible for updating the print notifications
	* based on print job state transitions.
	*/
	final class NotificationController {
	public static final boolean DEBUG = false;

	public static final String LOG_TAG = "NotificationController";

	private static final String INTENT_ACTION_CANCEL_PRINTJOB = "INTENT_ACTION_CANCEL_PRINTJOB";
	private static final String INTENT_ACTION_RESTART_PRINTJOB = "INTENT_ACTION_RESTART_PRINTJOB";

	private static final String EXTRA_PRINT_JOB_ID = "EXTRA_PRINT_JOB_ID";

	private static final String PRINT_JOB_NOTIFICATION_GROUP_KEY = "PRINT_JOB_NOTIFICATIONS";
	private static final String PRINT_JOB_NOTIFICATION_SUMMARY = "PRINT_JOB_NOTIFICATIONS_SUMMARY";

	private final Context mContext;
	private final NotificationManager mNotificationManager;

	/**
	* Mapping from printJobIds to their notification Ids.
	*/
	private final ArraySet<PrintJobId> mNotifications;

	public NotificationController(Context context) {
	mContext = context;
	mNotificationManager = (NotificationManager)
	mContext.getSystemService(Context.NOTIFICATION_SERVICE);
	mNotifications = new ArraySet<>(0);
	}

	public void onUpdateNotifications(List<PrintJobInfo> printJobs) {
	List<PrintJobInfo> notifyPrintJobs = new ArrayList<>();

	final int printJobCount = printJobs.size();
	for (int i = 0; i < printJobCount; i++) {
	PrintJobInfo printJob = printJobs.get(i);
	if (shouldNotifyForState(printJob.getState())) {
	notifyPrintJobs.add(printJob);
	}
	}

	updateNotifications(notifyPrintJobs);
	}

	/**
	* Update notifications for the given print jobs, remove all other notifications.
	*
	* @param printJobs The print job that we want to create notifications for.
	*/
	private void updateNotifications(List<PrintJobInfo> printJobs) {
	ArraySet<PrintJobId> removedPrintJobs = new ArraySet<>(mNotifications);

	final int numPrintJobs = printJobs.size();

	// Create summary notification
	if (numPrintJobs > 1) {
	createStackedNotification(printJobs);
	} else {
	mNotificationManager.cancel(PRINT_JOB_NOTIFICATION_SUMMARY, 0);
	}

	// Create per print job notification
	for (int i = 0; i < numPrintJobs; i++) {
	PrintJobInfo printJob = printJobs.get(i);
	PrintJobId printJobId = printJob.getId();

	removedPrintJobs.remove(printJobId);
	mNotifications.add(printJobId);

	createSimpleNotification(printJob);
	}

	// Remove notifications for print jobs that do not exist anymore
	final int numRemovedPrintJobs = removedPrintJobs.size();
	for (int i = 0; i < numRemovedPrintJobs; i++) {
	PrintJobId removedPrintJob = removedPrintJobs.valueAt(i);

	mNotificationManager.cancel(removedPrintJob.flattenToString(), 0);
	mNotifications.remove(removedPrintJob);
	}
	}

	private void createSimpleNotification(PrintJobInfo printJob) {
	switch (printJob.getState()) {
	case PrintJobInfo.STATE_FAILED: {
	createFailedNotification(printJob);
	} break;

	case PrintJobInfo.STATE_BLOCKED: {
	if (!printJob.isCancelling()) {
	createBlockedNotification(printJob);
	} else {
	createCancellingNotification(printJob);
	}
	} break;

	default: {
	if (!printJob.isCancelling()) {
	createPrintingNotification(printJob);
	} else {
	createCancellingNotification(printJob);
	}
	} break;
	}
	}

	/**
	* Create an {@link Action} that cancels a {@link PrintJobInfo print job}.
	*
	* @param printJob The {@link PrintJobInfo print job} to cancel
	*
	* @return An {@link Action} that will cancel a print job
	*/
	private Action createCancelAction(PrintJobInfo printJob) {
	return new Action.Builder(
	Icon.createWithResource(mContext, R.drawable.stat_notify_cancelling),
	mContext.getString(R.string.cancel), createCancelIntent(printJob)).build();
	}

	/**
	* Create a notification for a print job.
	*
	* @param printJob the job the notification is for
	* @param firstAction the first action shown in the notification
	* @param secondAction the second action shown in the notification
	*/
	private void createNotification(@NonNull PrintJobInfo printJob, @Nullable Action firstAction,
	@Nullable Action secondAction) {
	Notification.Builder builder = new Notification.Builder(mContext)
	.setContentIntent(createContentIntent(printJob.getId()))
	.setSmallIcon(computeNotificationIcon(printJob))
	.setContentTitle(computeNotificationTitle(printJob))
	.setWhen(System.currentTimeMillis())
	.setOngoing(true)
	.setShowWhen(true)
	.setColor(mContext.getColor(
	com.android.internal.R.color.system_notification_accent_color))
	.setGroup(PRINT_JOB_NOTIFICATION_GROUP_KEY);

	if (firstAction != null) {
	builder.addAction(firstAction);
	}

	if (secondAction != null) {
	builder.addAction(secondAction);
	}

	if (printJob.getState() == PrintJobInfo.STATE_STARTED
	\|\| printJob.getState() == PrintJobInfo.STATE_QUEUED) {
	float progress = printJob.getProgress();
	if (progress >= 0) {
	builder.setProgress(Integer.MAX_VALUE, (int) (Integer.MAX_VALUE * progress),
	false);
	} else {
	builder.setProgress(Integer.MAX_VALUE, 0, true);
	}
	}

	CharSequence status = printJob.getStatus();
	if (status != null) {
	builder.setContentText(status);
	} else {
	builder.setContentText(printJob.getPrinterName());
	}

	mNotificationManager.notify(printJob.getId().flattenToString(), 0, builder.build());
	}

	private void createPrintingNotification(PrintJobInfo printJob) {
	createNotification(printJob, createCancelAction(printJob), null);
	}

	private void createFailedNotification(PrintJobInfo printJob) {
	Action.Builder restartActionBuilder = new Action.Builder(
	Icon.createWithResource(mContext, R.drawable.ic_restart),
	mContext.getString(R.string.restart), createRestartIntent(printJob.getId()));

	createNotification(printJob, createCancelAction(printJob), restartActionBuilder.build());
	}

	private void createBlockedNotification(PrintJobInfo printJob) {
	createNotification(printJob, createCancelAction(printJob), null);
	}

	private void createCancellingNotification(PrintJobInfo printJob) {
	createNotification(printJob, null, null);
	}

	private void createStackedNotification(List<PrintJobInfo> printJobs) {
	Notification.Builder builder = new Notification.Builder(mContext)
	.setContentIntent(createContentIntent(null))
	.setWhen(System.currentTimeMillis())
	.setOngoing(true)
	.setShowWhen(true)
	.setGroup(PRINT_JOB_NOTIFICATION_GROUP_KEY)
	.setGroupSummary(true);

	final int printJobCount = printJobs.size();

	InboxStyle inboxStyle = new InboxStyle();

	int icon = com.android.internal.R.drawable.ic_print;
	for (int i = printJobCount - 1; i>= 0; i--) {
	PrintJobInfo printJob = printJobs.get(i);

	inboxStyle.addLine(computeNotificationTitle(printJob));

	// if any print job is in an error state show an error icon for the summary
	if (printJob.getState() == PrintJobInfo.STATE_FAILED
	\|\| printJob.getState() == PrintJobInfo.STATE_BLOCKED) {
	icon = com.android.internal.R.drawable.ic_print_error;
	}
	}

	builder.setSmallIcon(icon);
	builder.setLargeIcon(
	((BitmapDrawable) mContext.getResources().getDrawable(icon, null)).getBitmap());
	builder.setNumber(printJobCount);
	builder.setStyle(inboxStyle);
	builder.setColor(mContext.getColor(
	com.android.internal.R.color.system_notification_accent_color));

	mNotificationManager.notify(PRINT_JOB_NOTIFICATION_SUMMARY, 0, builder.build());
	}

	private String computeNotificationTitle(PrintJobInfo printJob) {
	switch (printJob.getState()) {
	case PrintJobInfo.STATE_FAILED: {
	return mContext.getString(R.string.failed_notification_title_template,
	printJob.getLabel());
	}

	case PrintJobInfo.STATE_BLOCKED: {
	if (!printJob.isCancelling()) {
	return mContext.getString(R.string.blocked_notification_title_template,
	printJob.getLabel());
	} else {
	return mContext.getString(
	R.string.cancelling_notification_title_template,
	printJob.getLabel());
	}
	}

	default: {
	if (!printJob.isCancelling()) {
	return mContext.getString(R.string.printing_notification_title_template,
	printJob.getLabel());
	} else {
	return mContext.getString(
	R.string.cancelling_notification_title_template,
	printJob.getLabel());
	}
	}
	}
	}

	private PendingIntent createContentIntent(PrintJobId printJobId) {
	Intent intent = new Intent(Settings.ACTION_PRINT_SETTINGS);
	if (printJobId != null) {
	intent.putExtra(EXTRA_PRINT_JOB_ID, printJobId.flattenToString());
	intent.setData(Uri.fromParts("printjob", printJobId.flattenToString(), null));
	}
	return PendingIntent.getActivity(mContext, 0, intent, 0);
	}

	private PendingIntent createCancelIntent(PrintJobInfo printJob) {
	Intent intent = new Intent(mContext, NotificationBroadcastReceiver.class);
	intent.setAction(INTENT_ACTION_CANCEL_PRINTJOB + "_" + printJob.getId().flattenToString());
	intent.putExtra(EXTRA_PRINT_JOB_ID, printJob.getId());
	return PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT);
	}

	private PendingIntent createRestartIntent(PrintJobId printJobId) {
	Intent intent = new Intent(mContext, NotificationBroadcastReceiver.class);
	intent.setAction(INTENT_ACTION_RESTART_PRINTJOB + "_" + printJobId.flattenToString());
	intent.putExtra(EXTRA_PRINT_JOB_ID, printJobId);
	return PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_ONE_SHOT);
	}

	private static boolean shouldNotifyForState(int state) {
	switch (state) {
	case PrintJobInfo.STATE_QUEUED:
	case PrintJobInfo.STATE_STARTED:
	case PrintJobInfo.STATE_FAILED:
	case PrintJobInfo.STATE_COMPLETED:
	case PrintJobInfo.STATE_CANCELED:
	case PrintJobInfo.STATE_BLOCKED: {
	return true;
	}
	}
	return false;
	}

	private static int computeNotificationIcon(PrintJobInfo printJob) {
	switch (printJob.getState()) {
	case PrintJobInfo.STATE_FAILED:
	case PrintJobInfo.STATE_BLOCKED: {
	return com.android.internal.R.drawable.ic_print_error;
	}
	default: {
	if (!printJob.isCancelling()) {
	return com.android.internal.R.drawable.ic_print;
	} else {
	return R.drawable.stat_notify_cancelling;
	}
	}
	}
	}

	public static final class NotificationBroadcastReceiver extends BroadcastReceiver {
	@SuppressWarnings("hiding")
	private static final String LOG_TAG = "NotificationBroadcastReceiver";

	@Override
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	if (action != null && action.startsWith(INTENT_ACTION_CANCEL_PRINTJOB)) {
	PrintJobId printJobId = intent.getExtras().getParcelable(EXTRA_PRINT_JOB_ID);
	handleCancelPrintJob(context, printJobId);
	} else if (action != null && action.startsWith(INTENT_ACTION_RESTART_PRINTJOB)) {
	PrintJobId printJobId = intent.getExtras().getParcelable(EXTRA_PRINT_JOB_ID);
	handleRestartPrintJob(context, printJobId);
	}
	}

	private void handleCancelPrintJob(final Context context, final PrintJobId printJobId) {
	if (DEBUG) {
	Log.i(LOG_TAG, "handleCancelPrintJob() printJobId:" + printJobId);
	}

	// Call into the print manager service off the main thread since
	// the print manager service may end up binding to the print spooler
	// service which binding is handled on the main thread.
	PowerManager powerManager = (PowerManager)
	context.getSystemService(Context.POWER_SERVICE);
	final WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
	LOG_TAG);
	wakeLock.acquire();

	new AsyncTask<Void, Void, Void>() {
	@Override
	protected Void doInBackground(Void... params) {
	// We need to request the cancellation to be done by the print
	// manager service since it has to communicate with the managing
	// print service to request the cancellation. Also we need the
	// system service to be bound to the spooler since canceling a
	// print job will trigger persistence of current jobs which is
	// done on another thread and until it finishes the spooler has
	// to be kept around.
	try {
	IPrintManager printManager = IPrintManager.Stub.asInterface(
	ServiceManager.getService(Context.PRINT_SERVICE));
	printManager.cancelPrintJob(printJobId, PrintManager.APP_ID_ANY,
	UserHandle.myUserId());
	} catch (RemoteException re) {
	Log.i(LOG_TAG, "Error requesting print job cancellation", re);
	} finally {
	wakeLock.release();
	}
	return null;
	}
	}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
	}

	private void handleRestartPrintJob(final Context context, final PrintJobId printJobId) {
	if (DEBUG) {
	Log.i(LOG_TAG, "handleRestartPrintJob() printJobId:" + printJobId);
	}

	// Call into the print manager service off the main thread since
	// the print manager service may end up binding to the print spooler
	// service which binding is handled on the main thread.
	PowerManager powerManager = (PowerManager)
	context.getSystemService(Context.POWER_SERVICE);
	final WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
	LOG_TAG);
	wakeLock.acquire();

	new AsyncTask<Void, Void, Void>() {
	@Override
	protected Void doInBackground(Void... params) {
	// We need to request the restart to be done by the print manager
	// service since the latter must be bound to the spooler because
	// restarting a print job will trigger persistence of current jobs
	// which is done on another thread and until it finishes the spooler has
	// to be kept around.
	try {
	IPrintManager printManager = IPrintManager.Stub.asInterface(
	ServiceManager.getService(Context.PRINT_SERVICE));
	printManager.restartPrintJob(printJobId, PrintManager.APP_ID_ANY,
	UserHandle.myUserId());
	} catch (RemoteException re) {
	Log.i(LOG_TAG, "Error requesting print job restart", re);
	} finally {
	wakeLock.release();
	}
	return null;
	}
	}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
	}
	}
	}