notification

分類

 notification有如下幾種:

　　1>普通notification

　　

　　　　1.內容標題

　　　　2.大圖標

　　　　3.內容

　　　　4.內容附加信息

　　　　5.小圖標

　　　　6.時間

　　2>大布局Notification

　　　　圖1

　　大布局notification是在android4.1之後才增長的，大布局notification與小布局notification只在 ‘7'部分有區別，其它部分都一致。大布局notification只有在全部notification的最上　　面時纔會顯示大布局，其它狀況下顯示小 佈局。你也能夠用手指將其擴展爲大布局(前提是它是大布局)。以下圖：

　　圖2

　　　　大布局notification有三種類型：如圖1爲NotificationCompat.InboxStyle 類型。圖2左部爲 NotificationCompat.BigTextStyle。圖2右部 爲：NotificationCompat.BigPictureStyle

 　　3>自定義佈局notification

 　　　　除了系統提供的notification，咱們也能夠自定義notification。以下圖所示的一個音樂播放器控制notification:

　　　　圖3

如何建立notification

---

　　　　1>實例化一個NotificationCompat.Builder對象;如builder

　　　　 2>調用builder的相關方法對notification進行上面提到的各類設置

　　　　3>調用builder.build()方法此方法返回一個notification對象。

　　　　 4>實例化一個NotificationManager對象；如：manager

　　　　 5>調用manager的notify方法。

　　注：

 　　一個notification沒必要對上面全部的選項都進行設置，但有3項是必須的：

　　 小圖標, set by setSmallIcon()

　    內容標題, set by setContentTitle()

　    內容, set by setContentText()

示例代碼

---

示例程序截圖：

 

0>初始化部分代碼

代碼以下:

View Code
 public class MainActivity extends Activity implements OnClickListener {

     private static final int NOTIFICATION_ID_1 = 0;
     private static final int NOTIFICATION_ID_2 = 1;
     private static final int NOTIFICATION_ID_3 = 2;
     private static final int NOTIFICATION_ID_4 = 3;
     private static final int NOTIFICATION_ID_5 = 4;
     private static final int NOTIFICATION_ID_6 = 5;
     private static final int NOTIFICATION_ID_7 = 6;
     private static final int NOTIFICATION_ID_8 = 7;

     private static int messageNum = 0;
     private Context context = this;
     private NotificationManager manager;
     private Bitmap icon;
     private static final int[] btns = new int[] { R.id.btn1, R.id.btn2,
             R.id.btn3, R.id.btn4, R.id.btn5, R.id.btn6, R.id.btn7, R.id.btn8,
             R.id.btn9 };

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         init();
     }

     private void init() {
         // 獲取通知服務
         manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
         // 註冊監聽器
         for (int btn : btns) {
             findViewById(btn).setOnClickListener(this);
         }

         icon = BitmapFactory.decodeResource(getResources(),
                 R.drawable.ic_launcher);
     }

     @Override
     public void onClick(View v) {
         switch (v.getId()) {
         case R.id.btn1:
             showNormal();
             break;
         case R.id.btn2:
             showBigView_Text();
             break;
         case R.id.btn3:
             showBigView_Pic();
             break;
         case R.id.btn4:
             showBigView_Inbox();
             break;
         case R.id.btn5:
             showCustomView();
             break;
         case R.id.btn6:
             backApp();
             break;
         case R.id.btn7:
             backScreen();
             break;
         case R.id.btn8:
             showProgressBar();
             break;
         case R.id.btn9:
             dismiss();
             break;
         default:
             Toast.makeText(context, "error", Toast.LENGTH_SHORT).show();
             break;
         }
     }

     private void dismiss() {
         manager.cancelAll();
     }

1>普通notification

代碼以下:

View Code
     private void showNormal() {

         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("showNormal").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setNumber(++messageNum)
                 .setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL)
                 .build();
         manager.notify(NOTIFICATION_ID_1, notification);
     }

2>大布局Text類型notification

代碼以下:

View Code
 private void showBigView_Text() {
         NotificationCompat.BigTextStyle textStyle = new BigTextStyle();
         textStyle
                 .setBigContentTitle("BigContentTitle")
                 .setSummaryText("SummaryText")
                 .bigText(
                         "I am Big Texttttttttttttttttttttttttttttttttttttttttttt!!!!!!!!!!!!!!!!!!!......");
         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("showBigView_Text").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setStyle(textStyle)
                 .setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL)
                 .build();
         manager.notify(NOTIFICATION_ID_2, notification);
     }

3> 大布局Picture類型notificatio

代碼以下:

View Code
 private void showBigView_Pic() {
         NotificationCompat.BigPictureStyle pictureStyle = new BigPictureStyle();
         pictureStyle.setBigContentTitle("BigContentTitle")
                 .setSummaryText("SummaryText").bigPicture(icon);
         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("showBigView_Pic").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setStyle(pictureStyle)
                 .setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL)
                 .build();
         manager.notify(NOTIFICATION_ID_3, notification);
     }

4>大布局Inbox類型notification

代碼以下:

View Code
 private void showBigView_Inbox() {
         NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
         inboxStyle.setBigContentTitle("BigContentTitle").setSummaryText(
                 "SummaryText");
         for (int i = 0; i < 5; i++)
             inboxStyle.addLine("news:" + i);
         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("showBigView_Inbox").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setStyle(inboxStyle)
                 .setAutoCancel(true).setDefaults(Notification.DEFAULT_ALL)
                 .build();
         manager.notify(NOTIFICATION_ID_4, notification);
     }

5>自定義notification
效果圖：

並對中間的播放按鈕作了一個簡單的點擊處理事件(點擊播放後，請關閉幕簾不然可能會看不到toast提示)

代碼以下:

View Code
 private void showCustomView() {
         RemoteViews remoteViews = new RemoteViews(getPackageName(),
                 R.layout.custom_notification);
         Intent intent = new Intent(this, TestMusicControl.class);
         PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,
                 intent, 0);
         remoteViews.setOnClickPendingIntent(R.id.paly_pause_music,
                 pendingIntent);
         NotificationCompat.Builder builder = new Builder(context);
         builder.setContent(remoteViews).setSmallIcon(R.drawable.music_icon)
                 .setLargeIcon(icon).setOngoing(true)
                 .setTicker("music is playing");
         manager.notify(NOTIFICATION_ID_8, builder.build());
     }

佈局文件：

代碼以下:

View Code
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:gravity="center_vertical"
     android:orientation="horizontal" >

     <ImageView
         android:id="@+id/songer_pic"
         android:layout_width="64dp"
         android:layout_height="64dp"
         android:src="@drawable/yan" />

     <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:gravity="center_vertical"
         android:orientation="horizontal" >

         <ImageView
             android:id="@+id/last_music"
             android:layout_width="0dp"
             android:layout_height="48dp"
             android:layout_weight="1"
             android:src="@drawable/music_previous" />

         <ImageView
             android:id="@+id/paly_pause_music"
             android:layout_width="0dp"
             android:layout_height="48dp"
             android:layout_weight="1"
             android:src="@drawable/music_play" />

         <ImageView
             android:id="@+id/next_music"
             android:layout_width="0dp"
             android:layout_height="48dp"
             android:layout_weight="1"
             android:src="@drawable/music_next" />
     </LinearLayout>

 </LinearLayout>

帶進度條的notification

代碼以下:

View Code
     private void showProgressBar() {

         final NotificationCompat.Builder builder = new NotificationCompat.Builder(
                 context);
         builder.setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("showProgressBar").setContentInfo("contentInfo")
                 .setOngoing(true).setContentTitle("ContentTitle")
                 .setContentText("ContentText");
         new Thread(new Runnable() {

             @Override
             public void run() {

                 int progress = 0;

                 for (progress = 0; progress < 100; progress += 5) {
                     //將setProgress的第三個參數設爲true便可顯示爲無明確進度的進度條樣式
                     builder.setProgress(100, progress, false);
                     manager.notify(NOTIFICATION_ID_7, builder.build());
                     try {
                         // Sleep for 5 seconds
                         Thread.sleep(2 * 1000);
                     } catch (InterruptedException e) {
                         System.out.println("sleep failure");
                     }
                 }
                 builder.setContentTitle("Download complete")
                         .setProgress(0, 0, false).setOngoing(false);
                 manager.notify(NOTIFICATION_ID_7, builder.build());

             }
         }).start();
     }

點擊事件處理

--------------------------------------------------------------------------------
　有時候咱們可能須要實現這樣的功能：當新notification出現時，咱們但願點擊它後可直接進入應用相應的界面中去完整查看或處理此消息的功能。 而後，當咱們點擊back按鈕時返回到應用主界面而不是桌面。好比：當咱們有新的短信來時，咱們在任務欄中點擊它後進入讀信息頁面，當咱們讀完短信後，按 「返回」鍵回到短信的主界面，而不是手機桌面。要實現這樣的功能要咱們作相應的處理：

1>返回應用主界面

代碼以下:

View Code
     private void backApp() {

         TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
         // Adds the back stack
         stackBuilder.addParentStack(OtherActivity.class);
         // Adds the Intent to the top of the stack
         Intent resultIntent = new Intent(this, OtherActivity.class);
         stackBuilder.addNextIntent(resultIntent);
         // Gets a PendingIntent containing the entire back stack
         PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0,
                 PendingIntent.FLAG_UPDATE_CURRENT);

         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("backApp").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setContentIntent(resultPendingIntent).setAutoCancel(true)
                 .setDefaults(Notification.DEFAULT_ALL).build();
         manager.notify(NOTIFICATION_ID_5, notification);
         this.finish();
     }

並須要咱們在配置文件中對咱們用來顯示詳細信息的OtherActivity進行相應的配置以下：

代碼以下:

<activity
             android:name="com.example.notification.OtherActivity"
             android:label="@string/title_activity_other"
             android:parentActivityName=".MainActivity" >
             <meta-data
                 android:name="android.support.PARENT_ACTIVITY"
                 android:value=".MainActivity" />
         </activity>

2>直接返回桌面

 　　有些時候咱們可能須要實現這樣的功能：當咱們點擊notification時彈出一個稍大點的窗口來顯示整個消息，這窗口的做用就是用來顯示 整個消息內容的，和此應用內的其它Activity都沒有關係，而後當咱們點擊"back"後直接返回到手機桌面。要實現這樣的功能咱們只須要調用 builder的.setContentIntent方法，而後對所要跳轉到的activity在配置文件中進行一些配置：

代碼以下:

View Code
 private void backScreen() {
         Intent notifyIntent = new Intent(this, SpecialActivity.class);
         // Sets the Activity to start in a new, empty task
         notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                 | Intent.FLAG_ACTIVITY_CLEAR_TASK);
         // Creates the PendingIntent
         PendingIntent notify_Intent = PendingIntent.getActivity(this, 0,
                 notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);

         Notification notification = new NotificationCompat.Builder(context)
                 .setLargeIcon(icon).setSmallIcon(R.drawable.ic_launcher)
                 .setTicker("backScreen").setContentInfo("contentInfo")
                 .setContentTitle("ContentTitle").setContentText("ContentText")
                 .setContentIntent(notify_Intent).setAutoCancel(true)
                 .setDefaults(Notification.DEFAULT_ALL).build();
         manager.notify(NOTIFICATION_ID_6, notification);
         this.finish();
     }

配置文件：

代碼以下:

 <activity              android:name="com.example.notification.SpecialActivity"              android:excludeFromRecents="true"              android:label="@string/title_activity_special"              android:launchMode="singleTask"              android:taskAffinity="" >