類概述：
一個表示如何使用NotificationManager把一個持久的通知呈現給用戶的類。
The Notification.Builder has been added to make it easier to construct Notifications.
添加Notification.Builder使構建Notification更容易。
靜態變量：
[java]
/**
* Use all default values (where applicable).
*/
public static final int DEFAULT_ALL = ~0;
/**
* Use the default notification sound. This will ignore any given
* {@link #sound}.
*
* @see #defaults
*/
public static final int DEFAULT_SOUND = 1;
/**
* Use the default notification vibrate. This will ignore any given
* {@link #vibrate}. Using phone vibration requires the
* {@link android.Manifest.permission#VIBRATE VIBRATE} permission.
*
* @see #defaults
*/
public static final int DEFAULT_VIBRATE = 2;
/**
* Use the default notification lights. This will ignore the
* {@link #FLAG_SHOW_LIGHTS} bit, and {@link #ledARGB}, {@link #ledOffMS}, or
* {@link #ledOnMS}.
*
* @see #defaults
*/
public static final int DEFAULT_LIGHTS = 4;
定義了默認的燈、震動、聲音和全部屬性。震動的話需要添加android.permission.VIBRATE權限。
[java]
* Use this constant as the value for audioStreamType to request that
* the default stream type for notifications be used. Currently the
* default stream type is STREAM_RING.
*/
public static final int STREAM_DEFAULT = -1;
notification默認的音頻類型。
[java]
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if you want the LED on for this notification.
* <ul>
* <li>To turn the LED off, pass 0 in the alpha channel for colorARGB
* or 0 for both ledOnMS and ledOffMS.</li>
* <li>To turn the LED on, pass 1 for ledOnMS and 0 for ledOffMS.</li>
* <li>To flash the LED, pass the number of milliseconds that it should
* be on and off to ledOnMS and ledOffMS.</li>
* </ul>
* <p>
* Since hardware varies, you are not guaranteed that any of the values
* you pass are honored exactly. Use the system defaults (TODO) if possible
* because they will be set to values that work on any given hardware.
* <p>
* The alpha channel must be set for forward compatibility.
*
*/
public static final int FLAG_SHOW_LIGHTS = 0x00000001;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if this notification is in reference to something that is ongoing,
* like a phone call. It should not be set if this notification is in
* reference to something that happened at a particular point in time,
* like a missed phone call.
*/
public static final int FLAG_ONGOING_EVENT = 0x00000002;
/**
* Bit to be bitwise-ored into the {@link #flags} field that if set,
* the audio will be repeated until the notification is
* cancelled or the notification window is opened.
*/
public static final int FLAG_INSISTENT = 0x00000004;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if you want the sound and/or vibration play each time the
* notification is sent, even if it has not been canceled before that.
*/
public static final int FLAG_ONLY_ALERT_ONCE = 0x00000008;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if the notification should be canceled when it is clicked by the
* user. On tablets, the
*/
public static final int FLAG_AUTO_CANCEL = 0x00000010;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if the notification should not be canceled when the user clicks
* the Clear all button.
*/
public static final int FLAG_NO_CLEAR = 0x00000020;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be
* set if this notification represents a currently running service. This
* will normally be set for you by {@link Service#startForeground}.
*/
public static final int FLAG_FOREGROUND_SERVICE = 0x00000040;
/**
* Bit to be bitwise-ored into the {@link #flags} field that should be set if this notification
* represents a high-priority event that may be shown to the user even if notifications are
* otherwise unavailable (that is, when the status bar is hidden). This flag is ideally used
* in conjunction with {@link #fullScreenIntent}.
*/
public static final int FLAG_HIGH_PRIORITY = 0x00000080;
FLAG_SHOW_LIGHTS:
如果想為Notification添加LED燈提示，需要在Flag屬性中添加FLAG_SHOW_LIGHT標志位。
LED關閉狀態下，0表示顏色或者LED燈開關
LED開啟狀態下，1代表LED開，0代表LED關。
LED閃爍狀態下，ledOnMS表示燈亮時間，ledOffMS表示燈滅時間。
因為硬件不一，所以不能保證在各種硬件上都能夠奏效，應盡可能使用系統給定的默認值(TODO)，它能夠適配各種硬件。
alpha通道必須設置為向前兼容性
FLAG_ONGOING_EVENT：
如果需要notification常駐狀態欄，引用正在進行的活動，如一個打進的電話，需要在Flag屬性中添加FLAG_ONGOING_EVENT標志位。但是其不能引用一個過去已經發生的活動，如一個未接電話。（設置其Flag，notification將被放入“正在進行”組）
FLAG_INSISTENT：
設置此Flag，在通知取消或通知窗口打開之前，音頻會一直重復。
FLAG_ONLY_ALERT_ONCE：
設置此Flag，震動和聲音只執行一次。
FLAG_AUTO_CANCEL：
設置此Flag，當用戶點擊時，通知會被清除。
FLAG_NO_CLEAR：
設置此Flag，當用戶點擊清除所有按鈕時，該通知不被清除。
FLAG_FOREGROUND_SERVICE：
設置此Flag，表示該通知為正運行的服務（當你退出手機QQ時，在狀態欄會看到一個QQ圖標）
FLAG_HIGH_PRIORITY：
一個過時的Flag，現在已使用優先級字段代替。設置該Flag表示一高優先級事件，當通知不可以使用（狀態欄被隱藏時）也可通知用戶，應配合fullScreenIntent使用。
常量
[java] view plaincopy
/**
* The timestamp for the notification. The icons and expanded views
* are sorted by this key.
*/
public long when;
/**
* The resource id of a drawable to use as the icon in the status bar.
* This is required; notifications with an invalid icon resource will not be shown.
*/
public int icon;
/**
* If the icon in the status bar is to have more than one level, you can set this. Otherwise,
* leave it at its default value of 0.
*
* @see android.widget.ImageView#setImageLevel
* @see android.graphics.drawable#setLevel
*/
public int iconLevel;
/**
* The number of events that this notification represents. For example, in a new mail
* notification, this could be the number of unread messages. This number is superimposed over
* the icon in the status bar. If the number is 0 or negative, it is not shown in the status
* bar.
*/
public int number;
/**
* The intent to execute when the expanded status entry is clicked. If
* this is an activity, it must include the
* {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires
* that you take care of task management as described in the
* <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
* Stack</a> document. In particular, make sure to read the notification section
* <a href="{@docRoot}guide/topics/ui/notifiers/notifications.html#HandlingNotifications">Handling
* Notifications</a> for the correct ways to launch an application from a
* notification.
*/
public PendingIntent contentIntent;
/**
* The intent to execute when the status entry is deleted by the user
* with the "Clear All Notifications" button. This probably shouldn't
* be launching an activity since several of those will be sent at the
* same time.
*/
public PendingIntent deleteIntent;
/**
* An intent to launch instead of posting the notification to the status bar.
*
* @see Notification.Builder#setFullScreenIntent
*/
public PendingIntent fullScreenIntent;
/**
* Text to scroll across the screen when this item is added to
* the status bar on large and smaller devices.
*
* <p>This field is provided separately from the other ticker fields
* both for compatibility and to allow an application to choose different
* text for when the text scrolls in and when it is displayed all at once
* in conjunction with one or more icons.
*
* @see #tickerView
*/
public CharSequence tickerText;
/**
* The view to show as the ticker in the status bar when the notification
* is posted.
*/
public RemoteViews tickerView;
/**
* The view that will represent this notification in the expanded status bar.
*/
public RemoteViews contentView;
/**
* The bitmap that may escape the bounds of the panel and bar.
*/
public Bitmap largeIcon;
/**
* The sound to play.
*
* <p>
* To play the default notification sound, see {@link #defaults}.
* </p>
*/
public Uri sound;
when：
通知的時間戳，通知圖標會根據該時間戳在狀態欄進行排序。
icon：
在狀態欄中顯示的圖標，如果是無效資源，不予顯示。
iconLevel：
如果狀態欄中的icon有等級之分，可以設置此參數，默認情況下，一般為0.
number：
通知事件發生的次數，比如一個郵件通知，這個參數表示未讀郵件數。這個數字會疊加到狀態欄中通知圖標上，如果為0或者負，則不顯示。
contentIntent：
The intent to execute when the expanded status entry is clicked.當擴展狀態內容被點擊時觸發該intent（expanded status entry不知道該如何翻譯是好了）如果是要跳轉到一個Activity，一定要包含FLAG_ACTIVITY_NEW_TASK這個標志位，用於調整堆棧中的Task。能夠確保正確的從一個通知進入一個應用。
deleteIntent：
當用戶點擊“clean all button"或者滑動取消通知時觸發該Intent，不能啟動一個activity或者server（因為會在同一時間發送）。
fullScreenIntent：
全屏狀態下代替狀態欄中intent功能
tickerText：
當通知發送時像股票一樣提示文本。
contentView：
在狀態欄中代表Notification的View。
largeIcon：
可以脫離狀態欄的圖片
sound：
通知聲音
audioStreamType：
視頻播放流類型
vibrate：
震動類型
ledARGB：
LED燈顏色
ledOnMS：
LED燈閃爍時，燈亮時間。
ledOffMS：
LED燈閃爍時，燈滅時間。
defaults：
LED默認值。
構造函數
默認構造函數：
[java]
/**
* Constructs a Notification object with everything set to 0.
* You might want to consider using {@link Builder} instead.
*/
public Notification()
{
this.when = System.currentTimeMillis();
}
可以用Notification.Builder來替代構造一個Notification（關於Builder建造者模式 http://blog.csdn.net/aomandeshangxiao/article/details/8214646）。
[java]
/**
* @hide
*/
public Notification(Context context, int icon, CharSequence tickerText, long when,
CharSequence contentTitle, CharSequence contentText, Intent contentIntent)
{
this.when = when;
this.icon = icon;
this.tickerText = tickerText;
setLatestEventInfo(context, contentTitle, contentText,
PendingIntent.getActivity(context, 0, contentIntent, 0));
}
這個構造函數被hide，setLatestEventInfo方法也被deprecate，不建議使用，使用Notification.Builder即可。
/**
* Constructs a Notification object with the information needed to
* have a status bar icon without the standard expanded view.
*
* @param icon The resource id of the icon to put in the status bar.
* @param tickerText The text that flows by in the status bar when the notification first
* activates.
* @param when The time to show in the time field. In the System.currentTimeMillis
* timebase.
*
* @deprecated Use {@link Builder} instead.
*/
@Deprecated
public Notification(int icon, CharSequence tickerText, long when)
{
this.icon = icon;
this.tickerText = tickerText;
this.when = when;
}
這個構造函數是deprecated（棄用）的。
[java]
/**
* Unflatten the notification from a parcel.
*/
public Notification(Parcel parcel)
{
int version = parcel.readInt();
when = parcel.readLong();
icon = parcel.readInt();
number = parcel.readInt();
if (parcel.readInt() != 0) {
contentIntent = PendingIntent.CREATOR.createFromParcel(parcel);
}
if (parcel.readInt() != 0) {
deleteIntent = PendingIntent.CREATOR.createFromParcel(parcel);
}
if (parcel.readInt() != 0) {
tickerText = TextUtils.CHAR_SEQUENCE_CREATOR.createFromParcel(parcel);
}
if (parcel.readInt() != 0) {
tickerView = RemoteViews.CREATOR.createFromParcel(parcel);
}
if (parcel.readInt() != 0) {
contentView = RemoteViews.CREATOR.createFromParcel(parcel);
}
if (parcel.readInt() != 0) {
largeIcon = Bitmap.CREATOR.createFromParcel(parcel);
}
defaults = parcel.readInt();
flags = parcel.readInt();
if (parcel.readInt() != 0) {
sound = Uri.CREATOR.createFromParcel(parcel);
}
audioStreamType = parcel.readInt();
vibrate = parcel.createLongArray();
ledARGB = parcel.readInt();
ledOnMS = parcel.readInt();
ledOffMS = parcel.readInt();
iconLevel = parcel.readInt();
if (parcel.readInt() != 0) {
fullScreenIntent = PendingIntent.CREATOR.createFromParcel(parcel);
}
}
通過一個Parcel一個參數來構造一個Notification。
其他方法
[java]
@Override
public Notification clone() {
Notification that = new Notification();
that.when = this.when;
that.icon = this.icon;
that.number = this.number;
// PendingIntents are global, so there's no reason (or way) to clone them.
that.contentIntent = this.contentIntent;
that.deleteIntent = this.deleteIntent;
that.fullScreenIntent = this.fullScreenIntent;
if (this.tickerText != null) {
that.tickerText = this.tickerText.toString();
}
if (this.tickerView != null) {
that.tickerView = this.tickerView.clone();
}
if (this.contentView != null) {
that.contentView = this.contentView.clone();
}
if (this.largeIcon != null) {
that.largeIcon = Bitmap.createBitmap(this.largeIcon);
}
that.iconLevel = this.iconLevel;
that.sound = this.sound; // android.net.Uri is immutable
that.audioStreamType = this.audioStreamType;
final long[] vibrate = this.vibrate;
if (vibrate != null) {
final int N = vibrate.length;
final long[] vib = that.vibrate = new long[N];
System.arraycopy(vibrate, 0, vib, 0, N);
}
that.ledARGB = this.ledARGB;
that.ledOnMS = this.ledOnMS;
that.ledOffMS = this.ledOffMS;
that.defaults = this.defaults;
that.flags = this.flags;
return that;
}
官網解釋：
Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.
創建並返回這個對象的一個拷貝。默認的實現返回一個所謂的“淺“復制:它創建一個新的實例相同的類,然後從這個實例復制字段值(包括對象引用)生成新實例。相對應的“深度”拷貝,也會遞歸地復制嵌套對象。一個子類,實現這種克隆需要調用super.clone()方法來創建一個深層嵌套的、可變的實例。
[java]
public int describeContents() {
return 0;
}
描述了在Parcelable中包含的各種特殊對象的編組表示。在代碼中直接返回0。
[java]
/**
* Flatten this notification from a parcel.
*/
public void writeToParcel(Parcel parcel, int flags)
{
parcel.writeInt(1);
parcel.writeLong(when);
parcel.writeInt(icon);
parcel.writeInt(number);
if (contentIntent != null) {
parcel.writeInt(1);
contentIntent.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
if (deleteIntent != null) {
parcel.writeInt(1);
deleteIntent.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
if (tickerText != null) {
parcel.writeInt(1);
TextUtils.writeToParcel(tickerText, parcel, flags);
} else {
parcel.writeInt(0);
}
if (tickerView != null) {
parcel.writeInt(1);
tickerView.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
if (contentView != null) {
parcel.writeInt(1);
contentView.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
if (largeIcon != null) {
parcel.writeInt(1);
largeIcon.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
parcel.writeInt(defaults);
parcel.writeInt(this.flags);
if (sound != null) {
parcel.writeInt(1);
sound.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
parcel.writeInt(audioStreamType);
parcel.writeLongArray(vibrate);
parcel.writeInt(ledARGB);
parcel.writeInt(ledOnMS);
parcel.writeInt(ledOffMS);
parcel.writeInt(iconLevel);
if (fullScreenIntent != null) {
parcel.writeInt(1);
fullScreenIntent.writeToParcel(parcel, 0);
} else {
parcel.writeInt(0);
}
}
用Notification填充Parcel。
[java]
/**
* Parcelable.Creator that instantiates Notification objects
*/
public static final Parcelable.Creator<Notification> CREATOR
= new Parcelable.Creator<Notification>()
{
public Notification createFromParcel(Parcel parcel)
{
return new Notification(parcel);
}
public Notification[] newArray(int size)
{
return new Notification[size];
}
};
通過Parcelable.Creator來實例化Notification。
[java]
* Sets the {@link #contentView} field to be a view with the standard "Latest Event"
* layout.
*
* <p>Uses the {@link #icon} and {@link #when} fields to set the icon and time fields
* in the view.</p>
* @param context The context for your application / activity.
* @param contentTitle The title that goes in the expanded entry.
* @param contentText The text that goes in the expanded entry.
* @param contentIntent The intent to launch when the user clicks the expanded notification.
* If this is an activity, it must include the
* {@link android.content.Intent#FLAG_ACTIVITY_NEW_TASK} flag, which requires
* that you take care of task management as described in the
* <a href="{@docRoot}guide/topics/fundamentals/tasks-and-back-stack.html">Tasks and Back
* Stack</a> document.
*
* @deprecated Use {@link Builder} instead.
*/
@Deprecated
public void setLatestEventInfo(Context context,
CharSequence contentTitle, CharSequence contentText, PendingIntent contentIntent) {
RemoteViews contentView = new RemoteViews(context.getPackageName(),
R.layout.status_bar_latest_event_content);
if (this.icon != 0) {
contentView.setImageViewResource(R.id.icon, this.icon);
}
if (contentTitle != null) {
contentView.setTextViewText(R.id.title, contentTitle);
}
if (contentText != null) {
contentView.setTextViewText(R.id.text, contentText);
}
if (this.when != 0) {
contentView.setLong(R.id.time, "setTime", when);
}
this.contentView = contentView;
this.contentIntent = contentIntent;
}
上面提到的setLatestEventInfo方法，被棄用，使用Notification.Builder替代。
設置最新點擊的內容視圖，通過設置圖標，時間等參數。
[java]
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Notification(contentView=");
if (contentView != null) {
sb.append(contentView.getPackage());
sb.append("/0x");
sb.append(Integer.toHexString(contentView.getLayoutId()));
} else {
sb.append("null");
}
sb.append(" vibrate=");
if (this.vibrate != null) {
int N = this.vibrate.length-1;
sb.append("[");
for (int i=0; i<N; i++) {
sb.append(this.vibrate[i]);
sb.append(',');
}
if (N != -1) {
sb.append(this.vibrate[N]);
}
sb.append("]");
} else if ((this.defaults & DEFAULT_VIBRATE) != 0) {
sb.append("default");
} else {
sb.append("null");
}
sb.append(",sound=");
if (this.sound != null) {
sb.append(this.sound.toString());
} else if ((this.defaults & DEFAULT_SOUND) != 0) {
sb.append("default");
} else {
sb.append("null");
}
sb.append(",defaults=0x");
sb.append(Integer.toHexString(this.defaults));
sb.append(",flags=0x");
sb.append(Integer.toHexString(this.flags));
if ((this.flags & FLAG_HIGH_PRIORITY) != 0) {
sb.append("!!!1!one!");
}
sb.append(")");
return sb.toString();
}
toString()方法。
建造者（Builder）
首先，Builder類是一個靜態內部類：
[java]
public static class Builder {
裡面使用到的全局變量：
[java]
private Context mContext;
private long mWhen;
private int mSmallIcon;
private int mSmallIconLevel;
private int mNumber;
private CharSequence mContentTitle;
private CharSequence mContentText;
private CharSequence mContentInfo;
private PendingIntent mContentIntent;
private RemoteViews mContentView;
private PendingIntent mDeleteIntent;
private PendingIntent mFullScreenIntent;
private CharSequence mTickerText;
private RemoteViews mTickerView;
private Bitmap mLargeIcon;
private Uri mSound;
private int mAudioStreamType;
private long[] mVibrate;
private int mLedArgb;
private int mLedOnMs;
private int mLedOffMs;
private int mDefaults;
private int mFlags;
private int mProgressMax;
private int mProgress;
private boolean mProgressIndeterminate;
參考上面Notification的全局變量。
構造函數：
[java]
/**
* Constructor.
*
* Automatically sets the when field to {@link System#currentTimeMillis()
* System.currentTimeMllis()} and the audio stream to the {@link #STREAM_DEFAULT}.
*
* @param context A {@link Context} that will be used to construct the
* RemoteViews. The Context will not be held past the lifetime of this
* Builder object.
*/
public Builder(Context context) {
mContext = context;
// Set defaults to match the defaults of a Notification
mWhen = System.currentTimeMillis();
mAudioStreamType = STREAM_DEFAULT;
}
需要傳入一個Context，然後獲取下當前時間，設置下視頻流類型。
設置當前事件時間：系統會根據這個時間在狀態欄上為Notification排序。
[java]
* Set the time that the event occurred. Notifications in the panel are
* sorted by this time.
*/
public Builder setWhen(long when) {
mWhen = when;
return this;
}
設置圖標：
[java]
/**
* Set the small icon to use in the notification layouts. Different classes of devices
* may return different sizes. See the UX guidelines for more information on how to
* design these icons.
*
* @param icon A resource ID in the application's package of the drawble to use.
*/
public Builder setSmallIcon(int icon) {
mSmallIcon = icon;
return this;
}
/**
* A variant of {@link #setSmallIcon(int) setSmallIcon(int)} that takes an additional
* level parameter for when the icon is a {@link android.graphics.drawable.LevelListDrawable
* LevelListDrawable}.
*
* @param icon A resource ID in the application's package of the drawble to use.
* @param level The level to use for the icon.
*
* @see android.graphics.drawable.LevelListDrawable
*/
public Builder setSmallIcon(int icon, int level) {
mSmallIcon = icon;
mSmallIconLevel = level;
return this;
}
設置Notification布局的小圖標，不同的硬件設備會顯示不同的尺寸。可以查看UX文檔獲取更多如何設計圖標的信息。
設置內容標題：
[java]
/**
* Set the title (first row) of the notification, in a standard notification.
*/
public Builder setContentTitle(CharSequence title) {
mContentTitle = title;
return this;
}
設置Notification的第一行標題。
設置內容：
[java]
/**
* Set the text (second row) of the notification, in a standard notification.
*/
public Builder setContentText(CharSequence text) {
mContentText = text;
return this;
}
設置Notification的第二行內容。
設置Notification右側數字：
[java]
/**
* Set the large number at the right-hand side of the notification. This is
* equivalent to setContentInfo, although it might show the number in a different
* font size for readability.
*/
public Builder setNumber(int number) {
mNumber = number;
return this;
}
設置在狀態欄右側顯示的數字，等同於setContentInfo，也可以顯示數字。
設置Notification右側顯示的文本：
[java]
/**
* Set the large text at the right-hand side of the notification.
*/
public Builder setContentInfo(CharSequence info) {
mContentInfo = info;
return this;
}
設置進度：
[java]
/**
* Set the progress this notification represents, which may be
* represented as a {@link ProgressBar}.
*/
public Builder setProgress(int max, int progress, boolean indeterminate) {
mProgressMax = max;
mProgress = progress;
mProgressIndeterminate = indeterminate;
return this;
}
Notification就相當於一個ProgrssBar。
設置內容視圖：
[java]
**
* Supply a custom RemoteViews to use instead of the standard one.
*/
public Builder setContent(RemoteViews views) {
mContentView = views;
return this;
}
使用自定義視圖替代標准視圖。
設置PendingIntent：
[java]
/**
* Supply a {@link PendingIntent} to send when the notification is clicked.
* If you do not supply an intent, you can now add PendingIntents to individual
* views to be launched when clicked by calling {@link RemoteViews#setOnClickPendingIntent
* RemoteViews.setOnClickPendingIntent(int,PendingIntent)}. Be sure to
* read {@link Notification#contentIntent Notification.contentIntent} for
* how to correctly use this.
*/
public Builder setContentIntent(PendingIntent intent) {
mContentIntent = intent;
return this;
}
當Notification被點擊時提供一個PendingIntent，如果沒有提供這個intent，可以在點擊時調用RemoteViews.setOnclickPendingIntent(int,PendingIntent)去設置一個PendingIntent.
設置DeleteIntent：
[java]
/**
* Supply a {@link PendingIntent} to send when the notification is cleared by the user
* directly from the notification panel. For example, this intent is sent when the user
* clicks the "Clear all" button, or the individual "X" buttons on notifications. This
* intent is not sent when the application calls {@link NotificationManager#cancel
* NotificationManager.cancel(int)}.
*/
public Builder setDeleteIntent(PendingIntent intent) {
mDeleteIntent = intent;
return this;
}
設置一個當用戶清除狀態欄中的Notification是觸發的PendingIntent。
設置FullScreenIntent：
[java]
/**
* An intent to launch instead of posting the notification to the status bar.
* Only for use with extremely high-priority notifications demanding the user's
* <strong>immediate</strong> attention, such as an incoming phone call or
* alarm clock that the user has explicitly set to a particular time.
* If this facility is used for something else, please give the user an option
* to turn it off and use a normal notification, as this can be extremely
* disruptive.
*
* @param intent The pending intent to launch.
* @param highPriority Passing true will cause this notification to be sent
* even if other notifications are suppressed.
*/
public Builder setFullScreenIntent(PendingIntent intent, boolean highPriority) {
mFullScreenIntent = intent;
setFlag(FLAG_HIGH_PRIORITY, highPriority);
return this;
}
一個全屏狀態下替代狀態欄上的Notification的intent，僅適用於使用非常高的優先級通知，會引起用戶的即時關注，如用戶已顯式設置為一個特定的時間，一個來電或鬧鐘。
設置TickerText：
[java]
/**
* Set the text that is displayed in the status bar when the notification first
* arrives.
*/
public Builder setTicker(CharSequence tickerText) {
mTickerText = tickerText;
return this;
}
/**
* Set the text that is displayed in the status bar when the notification first
* arrives, and also a RemoteViews object that may be displayed instead on some
* devices.
*/
public Builder setTicker(CharSequence tickerText, RemoteViews views) {
mTickerText = tickerText;
mTickerView = views;
return this;
}
設置Notification第一次到達時在status Bar 上面顯示的文本，第二個方法裡面還可以設置一個自定義視圖。
設置大圖標：
[java]
/**
* Set the large icon that is shown in the ticker and notification.
*/
public Builder setLargeIcon(Bitmap icon) {
mLargeIcon = icon;
return this;
}
設置聲音：
[java]
/**
* Set the sound to play. It will play on the default stream.
*/
public Builder setSound(Uri sound) {
mSound = sound;
mAudioStreamType = STREAM_DEFAULT;
return this;
}
/**
* Set the sound to play. It will play on the stream you supply.
*
* @see #STREAM_DEFAULT
* @see AudioManager for the <code>STREAM_</code> constants.
*/
public Builder setSound(Uri sound, int streamType) {
mSound = sound;
mAudioStreamType = streamType;
return this;
}
設置震動：
[java]
/**
* Set the vibration pattern to use.
*
* @see android.os.Vibrator for a discussion of the <code>pattern</code>
* parameter.
*/
public Builder setVibrate(long[] pattern) {
mVibrate = pattern;
return this;
}
設置LED燈光：
[java]
/**
* Set the argb value that you would like the LED on the device to blnk, as well as the
* rate. The rate is specified in terms of the number of milliseconds to be on
* and then the number of milliseconds to be off.
*/
public Builder setLights(int argb, int onMs, int offMs) {
mLedArgb = argb;
mLedOnMs = onMs;
mLedOffMs = offMs;
return this;
}
設置Ongoing：
[java]
/**
* Set whether this is an ongoing notification.
*
* <p>Ongoing notifications differ from regular notifications in the following ways:
* <ul>
* <li>Ongoing notifications are sorted above the regular notifications in the
* notification panel.</li>
* <li>Ongoing notifications do not have an 'X' close button, and are not affected
* by the "Clear all" button.
* </ul>
*/
public Builder setOngoing(boolean ongoing) {
setFlag(FLAG_ONGOING_EVENT, ongoing);
return this;
}
設置Notification是否是正在進行。
設置是否只提示一次：
[java]
/**
* Set this flag if you would only like the sound, vibrate
* and ticker to be played if the notification is not already showing.
*/
public Builder setOnlyAlertOnce(boolean onlyAlertOnce) {
setFlag(FLAG_ONLY_ALERT_ONCE, onlyAlertOnce);
return this;
}
設置是否自動取消：
[java]
* Setting this flag will make it so the notification is automatically
* canceled when the user clicks it in the panel. The PendingIntent
* set with {@link #setDeleteIntent} will be broadcast when the notification
* is canceled.
*/
public Builder setAutoCancel(boolean autoCancel) {
setFlag(FLAG_AUTO_CANCEL, autoCancel);
return this;
}
裡面都用的私有setFlag方法：
[java]
private void setFlag(int mask, boolean value) {
if (value) {
mFlags |= mask;
} else {
mFlags &= ~mask;
}
}
使用默認設置：
[java]
/**
* Set the default notification options that will be used.
* <p>
* The value should be one or more of the following fields combined with
* bitwise-or:
* {@link #DEFAULT_SOUND}, {@link #DEFAULT_VIBRATE}, {@link #DEFAULT_LIGHTS}.
* <p>
* For all default values, use {@link #DEFAULT_ALL}.
*/
public Builder setDefaults(int defaults) {
mDefaults = defaults;
return this;
}
通過ID獲取notification視圖：
[java]
private RemoteViews makeRemoteViews(int resId) {
RemoteViews contentView = new RemoteViews(mContext.getPackageName(), resId);
boolean hasLine3 = false;
if (mSmallIcon != 0) {
contentView.setImageViewResource(R.id.icon, mSmallIcon);
contentView.setViewVisibility(R.id.icon, View.VISIBLE);
} else {
contentView.setViewVisibility(R.id.icon, View.GONE);
}
if (mContentTitle != null) {
contentView.setTextViewText(R.id.title, mContentTitle);
}
if (mContentText != null) {
contentView.setTextViewText(R.id.text, mContentText);
hasLine3 = true;
}
if (mContentInfo != null) {
contentView.setTextViewText(R.id.info, mContentInfo);
contentView.setViewVisibility(R.id.info, View.VISIBLE);
hasLine3 = true;
} else if (mNumber > 0) {
final int tooBig = mContext.getResources().getInteger(
R.integer.status_bar_notification_info_maxnum);
if (mNumber > tooBig) {
contentView.setTextViewText(R.id.info, mContext.getResources().getString(
R.string.status_bar_notification_info_overflow));
} else {
NumberFormat f = NumberFormat.getIntegerInstance();
contentView.setTextViewText(R.id.info, f.format(mNumber));
}
contentView.setViewVisibility(R.id.info, View.VISIBLE);
hasLine3 = true;
} else {
contentView.setViewVisibility(R.id.info, View.GONE);
}
if (mProgressMax != 0 || mProgressIndeterminate) {
contentView.setProgressBar(
R.id.progress, mProgressMax, mProgress, mProgressIndeterminate);
contentView.setViewVisibility(R.id.progress, View.VISIBLE);
} else {
contentView.setViewVisibility(R.id.progress, View.GONE);
}
if (mWhen != 0) {
contentView.setLong(R.id.time, "setTime", mWhen);
}
contentView.setViewVisibility(R.id.line3, hasLine3 ? View.VISIBLE : View.GONE);
return contentView;
}
獲取默認視圖：
[java]
private RemoteViews makeContentView() {
if (mContentView != null) {
return mContentView;
} else {
return makeRemoteViews(mLargeIcon == null
? R.layout.status_bar_latest_event_content
: R.layout.status_bar_latest_event_content_large_icon);
}
}
獲取TickerView：
[java]
private RemoteViews makeTickerView() {
if (mTickerView != null) {
return mTickerView;
} else {
if (mContentView == null) {
return makeRemoteViews(mLargeIcon == null
? R.layout.status_bar_latest_event_ticker
: R.layout.status_bar_latest_event_ticker_large_icon);
} else {
return null;
}
}
}
注意上面三個方法均是私有方法，在外部不能訪問，在下面的方法中調用到了這些方法
通過Builder最後獲取一個Notification：
[java]
/**
* Combine all of the options that have been set and return a new {@link Notification}
* object.
*/
public Notification getNotification() {
Notification n = new Notification();
n.when = mWhen;
n.icon = mSmallIcon;
n.iconLevel = mSmallIconLevel;
n.number = mNumber;
n.contentView = makeContentView();
n.contentIntent = mContentIntent;
n.deleteIntent = mDeleteIntent;
n.fullScreenIntent = mFullScreenIntent;
n.tickerText = mTickerText;
n.tickerView = makeTickerView();
n.largeIcon = mLargeIcon;
n.sound = mSound;
n.audioStreamType = mAudioStreamType;
n.vibrate = mVibrate;
n.ledARGB = mLedArgb;
n.ledOnMS = mLedOnMs;
n.ledOffMS = mLedOffMs;
n.defaults = mDefaults;
n.flags = mFlags;
if (mLedOnMs != 0 && mLedOffMs != 0) {
n.flags |= FLAG_SHOW_LIGHTS;
}
if ((mDefaults & DEFAULT_LIGHTS) != 0) {
n.flags |= FLAG_SHOW_LIGHTS;
}
return n;
}
Builder的最後，提供一個完整的產品出來。
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