Android發送通知欄信息

1.首先，獲取系統的通知服務：

NotificationManager nm = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);

2.發送一個最簡單的通知

public void simpleNotice(View view) {
        //此Builder爲android.support.v4.app.NotificationCompat.Builder中的，下同。
        Builder mBuilder = new Builder(this);
        //系統收到通知時，通知欄上面顯示的文字。
        mBuilder.setTicker(天津，晴，2～15度，微風);
        //顯示在通知欄上的小圖標
        mBuilder.setSmallIcon(R.drawable.consult_answer);
        //通知標題
        mBuilder.setContentTitle(天氣預報);
        //通知內容
        mBuilder.setContentText(天津，晴，2～15度，微風);

        //設置大圖標，即通知條上左側的圖片（如果只設置了小圖標，則此處會顯示小圖標）
        mBuilder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.share_sina));
        //顯示在小圖標左側的數字
        mBuilder.setNumber(6);

        //設置爲不可清除模式
        mBuilder.setOngoing(true);

        //顯示通知，id必須不重複，否則新的通知會覆蓋舊的通知（利用這一特性，可以對通知進行更新）
        nm.notify(1, mBuilder.build());
    }

3.刪除一個通知。參數即爲通知的id
nm.cancel(1);
4.發送一個通知，點擊通知後跳轉到一個Activity，從這個Activity返回後，進入程序內的某一個頁面（一般爲主頁）

//點擊通知進入一個Activity，點擊返回時進入指定頁面。
    public void resultActivityBackApp(View view) {
        Builder mBuilder = new Builder(this);
        mBuilder.setTicker(通知標題2);
        mBuilder.setSmallIcon(R.drawable.ic_launcher);
        mBuilder.setContentTitle(通知標題2);
        mBuilder.setContentText(點擊通知進入一個Activity，點擊返回時進入指定頁面。);

        //設置點擊一次後消失（如果沒有點擊事件，則該方法無效。）
        mBuilder.setAutoCancel(true);

        //點擊通知之後需要跳轉的頁面
        Intent resultIntent = new Intent(this, ResultActivityBackApp.class);

        //使用TaskStackBuilder爲“通知頁面”設置返回關係
        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        //爲點擊通知後打開的頁面設定 返回 頁面。（在manifest中指定）
        stackBuilder.addParentStack(ResultActivityBackApp.class);
        stackBuilder.addNextIntent(resultIntent);

        PendingIntent pIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
        mBuilder.setContentIntent(pIntent);
        // mId allows you to update the notification later on.
        nm.notify(2, mBuilder.build());
    }

同時，需要在manifest中爲點擊通知後打開的Activity指定父Activity.

(其中，activity的屬性parentActivityName爲API 16中的屬性，meta-data中的代碼爲兼容API 16以下。因此，對於大多數程序，這兩個地方都得寫。)

5.和上述4類似，只是在打開的Activity中返回時回到home頁

 //點擊通知進入一個Activity，點擊返回時回到桌面
    public void resultActivityBackHome(View view) {
        Builder mBuilder = new Builder(this);
        mBuilder.setTicker(通知標題3);
        mBuilder.setSmallIcon(R.drawable.ic_launcher);
        mBuilder.setContentTitle(通知標題3);
        mBuilder.setContentText(點擊通知進入一個Activity，點擊返回時回到桌面);

        //設置點擊一次後消失（如果沒有點擊事件，則該方法無效。）
        mBuilder.setAutoCancel(true);

        Intent notifyIntent = new Intent(this, ResultActivityBackHome.class);
        notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        PendingIntent pIntent = PendingIntent.getActivity(this, 0, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        mBuilder.setContentIntent(pIntent);

        nm.notify(3, mBuilder.build());
    }

6.帶進度條的通知

public void progressNotice(View view) {
    final Builder mBuilder = new Builder(this);
    mBuilder.setTicker(通知標題4);

    mBuilder.setContentTitle(Picture Download)
            .setContentText(Download in progress)
            .setSmallIcon(R.drawable.ic_launcher);

    // Start a lengthy operation in a background thread
    new Thread(new Runnable() {
        @Override
        public void run() {
            int progress;
            for (progress = 0; progress <= 100; progress++) {
                // Sets the progress indicator to a max value, the current completion percentage,
                // and determinate state
                mBuilder.setProgress(100, progress, false);

                //不明確進度的進度條

// mBuilder.setProgress(0, 0, true);

                nm.notify(4, mBuilder.build());
                // 模擬延時
                try {
                    Thread.sleep(200);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

            // When the loop is finished, updates the notification
            mBuilder.setContentText(Download complete);
            // Removes the progress bar
            mBuilder.setProgress(0, 0, false);
            nm.notify(4, mBuilder.build());
        }
    }
    ).start();
}

7.擴展布局的通知。按住通知條下滑，可以查看更詳細的內容

public void expandLayoutNotice(View view) {
        Builder mBuilder = new Builder(this);
        mBuilder.setTicker(通知標題5);
        mBuilder.setSmallIcon(R.drawable.ic_launcher);
        mBuilder.setContentTitle(通知標題5);
        mBuilder.setContentText(按住通知下拉可顯示擴展布局);

        NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();
        String[] events = new String[]{Beijing, Tianjin, Shanghai, Guangzhou};
        // 設置擴展布局的標題
        inboxStyle.setBigContentTitle(Event tracker details:);

        for (String s : events) {
            inboxStyle.addLine(s);
        }
        mBuilder.setStyle(inboxStyle);

        nm.notify(5, mBuilder.build());
    }

8.自定義佈局的通知欄。（根據谷歌的官方文檔不推薦這麼做，因爲使用這種方式時，對不同屏幕進行適配需要考慮的因素太多。而且，通知欄應該展示的就是最簡明扼要的信息，對於大多數程序默認的佈局已經足夠了。）

//自定義佈局的通知
    public void customLayoutNotice(View view) {
        Builder mBuilder = new Builder(this);
        mBuilder.setTicker(通知標題6);
        mBuilder.setTicker(通知標題6);
        mBuilder.setSmallIcon(R.drawable.ic_launcher);

        RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.custom_layout_notice);
        mBuilder.setContent(remoteViews);
        //爲RemoteViews上的按鈕設置文字
        remoteViews.setCharSequence(R.id.custom_layout_button1, setText, Button1);
        remoteViews.setCharSequence(R.id.custom_layout_button2, setText, Button2);

        //爲RemoteViews上的按鈕設置點擊事件
        Intent intent1 = new Intent(this, CustomLayoutResultActivity.class);
        intent1.putExtra(content, From button1 click!);
        PendingIntent pIntentButton1 = PendingIntent.getActivity(this, 0, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.custom_layout_button1, pIntentButton1);

        Intent intent2 = new Intent(this, CustomLayoutResultActivity.class);
        intent2.putExtra(content, From button2 click!);
        PendingIntent pIntentButton2 = PendingIntent.getActivity(this, 1, intent2, PendingIntent.FLAG_UPDATE_CURRENT);
        remoteViews.setOnClickPendingIntent(R.id.custom_layout_button2, pIntentButton2);

        nm.notify(6, mBuilder.build());
    }