Java tutorial
/* * Copyright (C) 2008 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 android.service.notification; import android.annotation.UnsupportedAppUsage; import android.app.Notification; import android.app.NotificationChannel; import android.content.Context; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.os.Build; import android.os.Parcel; import android.os.Parcelable; import android.os.UserHandle; /** * Class encapsulating a Notification. Sent by the NotificationManagerService to clients including * the status bar and any {@link android.service.notification.NotificationListenerService}s. */ public class StatusBarNotification implements Parcelable { @UnsupportedAppUsage private final String pkg; @UnsupportedAppUsage private final int id; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final String tag; private final String key; private String groupKey; private String overrideGroupKey; @UnsupportedAppUsage private final int uid; private final String opPkg; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final int initialPid; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final Notification notification; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final UserHandle user; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private final long postTime; private Context mContext; // used for inflation & icon expansion /** @hide */ public StatusBarNotification(String pkg, String opPkg, int id, String tag, int uid, int initialPid, Notification notification, UserHandle user, String overrideGroupKey, long postTime) { if (pkg == null) throw new NullPointerException(); if (notification == null) throw new NullPointerException(); this.pkg = pkg; this.opPkg = opPkg; this.id = id; this.tag = tag; this.uid = uid; this.initialPid = initialPid; this.notification = notification; this.user = user; this.postTime = postTime; this.overrideGroupKey = overrideGroupKey; this.key = key(); this.groupKey = groupKey(); } /** * @deprecated Non-system apps should not need to create StatusBarNotifications. */ @Deprecated public StatusBarNotification(String pkg, String opPkg, int id, String tag, int uid, int initialPid, int score, Notification notification, UserHandle user, long postTime) { if (pkg == null) throw new NullPointerException(); if (notification == null) throw new NullPointerException(); this.pkg = pkg; this.opPkg = opPkg; this.id = id; this.tag = tag; this.uid = uid; this.initialPid = initialPid; this.notification = notification; this.user = user; this.postTime = postTime; this.key = key(); this.groupKey = groupKey(); } public StatusBarNotification(Parcel in) { this.pkg = in.readString(); this.opPkg = in.readString(); this.id = in.readInt(); if (in.readInt() != 0) { this.tag = in.readString(); } else { this.tag = null; } this.uid = in.readInt(); this.initialPid = in.readInt(); this.notification = new Notification(in); this.user = UserHandle.readFromParcel(in); this.postTime = in.readLong(); if (in.readInt() != 0) { this.overrideGroupKey = in.readString(); } else { this.overrideGroupKey = null; } this.key = key(); this.groupKey = groupKey(); } private String key() { String sbnKey = user.getIdentifier() + "|" + pkg + "|" + id + "|" + tag + "|" + uid; if (overrideGroupKey != null && getNotification().isGroupSummary()) { sbnKey = sbnKey + "|" + overrideGroupKey; } return sbnKey; } private String groupKey() { if (overrideGroupKey != null) { return user.getIdentifier() + "|" + pkg + "|" + "g:" + overrideGroupKey; } final String group = getNotification().getGroup(); final String sortKey = getNotification().getSortKey(); if (group == null && sortKey == null) { // a group of one return key; } return user.getIdentifier() + "|" + pkg + "|" + (group == null ? "c:" + notification.getChannelId() : "g:" + group); } /** * Returns true if this notification is part of a group. */ public boolean isGroup() { if (overrideGroupKey != null || isAppGroup()) { return true; } return false; } /** * Returns true if application asked that this notification be part of a group. * @hide */ public boolean isAppGroup() { if (getNotification().getGroup() != null || getNotification().getSortKey() != null) { return true; } return false; } public void writeToParcel(Parcel out, int flags) { out.writeString(this.pkg); out.writeString(this.opPkg); out.writeInt(this.id); if (this.tag != null) { out.writeInt(1); out.writeString(this.tag); } else { out.writeInt(0); } out.writeInt(this.uid); out.writeInt(this.initialPid); this.notification.writeToParcel(out, flags); user.writeToParcel(out, flags); out.writeLong(this.postTime); if (this.overrideGroupKey != null) { out.writeInt(1); out.writeString(this.overrideGroupKey); } else { out.writeInt(0); } } public int describeContents() { return 0; } public static final Parcelable.Creator<StatusBarNotification> CREATOR = new Parcelable.Creator<StatusBarNotification>() { public StatusBarNotification createFromParcel(Parcel parcel) { return new StatusBarNotification(parcel); } public StatusBarNotification[] newArray(int size) { return new StatusBarNotification[size]; } }; /** * @hide */ public StatusBarNotification cloneLight() { final Notification no = new Notification(); this.notification.cloneInto(no, false); // light copy return new StatusBarNotification(this.pkg, this.opPkg, this.id, this.tag, this.uid, this.initialPid, no, this.user, this.overrideGroupKey, this.postTime); } @Override public StatusBarNotification clone() { return new StatusBarNotification(this.pkg, this.opPkg, this.id, this.tag, this.uid, this.initialPid, this.notification.clone(), this.user, this.overrideGroupKey, this.postTime); } @Override public String toString() { return String.format("StatusBarNotification(pkg=%s user=%s id=%d tag=%s key=%s: %s)", this.pkg, this.user, this.id, this.tag, this.key, this.notification); } /** Convenience method to check the notification's flags for * {@link Notification#FLAG_ONGOING_EVENT}. */ public boolean isOngoing() { return (notification.flags & Notification.FLAG_ONGOING_EVENT) != 0; } /** Convenience method to check the notification's flags for * either {@link Notification#FLAG_ONGOING_EVENT} or * {@link Notification#FLAG_NO_CLEAR}. */ public boolean isClearable() { return ((notification.flags & Notification.FLAG_ONGOING_EVENT) == 0) && ((notification.flags & Notification.FLAG_NO_CLEAR) == 0); } /** * Returns a userid for whom this notification is intended. * * @deprecated Use {@link #getUser()} instead. */ @Deprecated public int getUserId() { return this.user.getIdentifier(); } /** The package of the app that posted the notification. */ public String getPackageName() { return pkg; } /** The id supplied to {@link android.app.NotificationManager#notify(int,Notification)}. */ public int getId() { return id; } /** The tag supplied to {@link android.app.NotificationManager#notify(int,Notification)}, * or null if no tag was specified. */ public String getTag() { return tag; } /** The notifying app's calling uid. @hide */ @UnsupportedAppUsage public int getUid() { return uid; } /** The package used for AppOps tracking. @hide */ @UnsupportedAppUsage public String getOpPkg() { return opPkg; } /** @hide */ @UnsupportedAppUsage public int getInitialPid() { return initialPid; } /** The {@link android.app.Notification} supplied to * {@link android.app.NotificationManager#notify(int,Notification)}. */ public Notification getNotification() { return notification; } /** * The {@link android.os.UserHandle} for whom this notification is intended. */ public UserHandle getUser() { return user; } /** The time (in {@link System#currentTimeMillis} time) the notification was posted, * which may be different than {@link android.app.Notification#when}. */ public long getPostTime() { return postTime; } /** * A unique instance key for this notification record. */ public String getKey() { return key; } /** * A key that indicates the group with which this message ranks. */ public String getGroupKey() { return groupKey; } /** * The ID passed to setGroup(), or the override, or null. * @hide */ public String getGroup() { if (overrideGroupKey != null) { return overrideGroupKey; } return getNotification().getGroup(); } /** * Sets the override group key. */ public void setOverrideGroupKey(String overrideGroupKey) { this.overrideGroupKey = overrideGroupKey; groupKey = groupKey(); } /** * Returns the override group key. */ public String getOverrideGroupKey() { return overrideGroupKey; } /** * @hide */ @UnsupportedAppUsage public Context getPackageContext(Context context) { if (mContext == null) { try { ApplicationInfo ai = context.getPackageManager().getApplicationInfoAsUser(pkg, PackageManager.MATCH_UNINSTALLED_PACKAGES, getUserId()); mContext = context.createApplicationContext(ai, Context.CONTEXT_RESTRICTED); } catch (PackageManager.NameNotFoundException e) { mContext = null; } } if (mContext == null) { mContext = context; } return mContext; } }