Android发送通知栏消息

1.首先，获取系统的通知服务：

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

2.发送一个最简单的通知

public void simpleNotice(View view) {        //此Builder为android.support.v4.app.NotificationCompat.Builder中的，下同。        Builder mBuilder = new Builder(this);        //系统收到通知时，通知栏上面显示的文字。        mBuilder.setTicker(天津，晴，2～15度，微风);        //显示在通知栏上的小图标        mBuilder.setSmallIcon(R.drawable.consult_answer);        //通知标题        mBuilder.setContentTitle(天气预报);        //通知内容        mBuilder.setContentText(天津，晴，2～15度，微风);        //设置大图标，即通知条上左侧的图片（如果只设置了小图标，则此处会显示小图标）        mBuilder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.share_sina));        //显示在小图标左侧的数字        mBuilder.setNumber(6);        //设置为不可清除模式        mBuilder.setOngoing(true);        //显示通知，id必须不重复，否则新的通知会覆盖旧的通知（利用这一特性，可以对通知进行更新）        nm.notify(1, mBuilder.build());    }

3.删除一个通知。参数即为通知的id
nm.cancel(1);
4.发送一个通知，点击通知后跳转到一个Activity，从这个Activity返回后，进入程序内的某一个页面（一般为主页）

//点击通知进入一个Activity，点击返回时进入指定页面。    public void resultActivityBackApp(View view) {        Builder mBuilder = new Builder(this);        mBuilder.setTicker(通知标题2);        mBuilder.setSmallIcon(R.drawable.ic_launcher);        mBuilder.setContentTitle(通知标题2);        mBuilder.setContentText(点击通知进入一个Activity，点击返回时进入指定页面。);        //设置点击一次后消失（如果没有点击事件，则该方法无效。）        mBuilder.setAutoCancel(true);        //点击通知之后需要跳转的页面        Intent resultIntent = new Intent(this, ResultActivityBackApp.class);        //使用TaskStackBuilder为“通知页面”设置返回关系        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);        //为点击通知后打开的页面设定 返回 页面。（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());    }

同时，需要在manifest中为点击通知后打开的Activity指定父Activity.

(其中，activity的属性parentActivityName为API 16中的属性，meta-data中的代码为兼容API 16以下。因此，对于大多数程序，这两个地方都得写。)

5.和上述4类似，只是在打开的Activity中返回时回到home页

 //点击通知进入一个Activity，点击返回时回到桌面    public void resultActivityBackHome(View view) {        Builder mBuilder = new Builder(this);        mBuilder.setTicker(通知标题3);        mBuilder.setSmallIcon(R.drawable.ic_launcher);        mBuilder.setContentTitle(通知标题3);        mBuilder.setContentText(点击通知进入一个Activity，点击返回时回到桌面);        //设置点击一次后消失（如果没有点击事件，则该方法无效。）        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.带进度条的通知

 public void progressNotice(View view) {    final Builder mBuilder = new Builder(this);    mBuilder.setTicker(通知标题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);                //不明确进度的进度条

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

                nm.notify(4, mBuilder.build());                // 模拟延时                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.扩展布局的通知。按住通知条下滑，可以查看更详细的内容

public void expandLayoutNotice(View view) {        Builder mBuilder = new Builder(this);        mBuilder.setTicker(通知标题5);        mBuilder.setSmallIcon(R.drawable.ic_launcher);        mBuilder.setContentTitle(通知标题5);        mBuilder.setContentText(按住通知下拉可显示扩展布局);        NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();        String[] events = new String[]{Beijing, Tianjin, Shanghai, Guangzhou};        // 设置扩展布局的标题        inboxStyle.setBigContentTitle(Event tracker details:);        for (String s : events) {            inboxStyle.addLine(s);        }        mBuilder.setStyle(inboxStyle);        nm.notify(5, mBuilder.build());    }

8.自定义布局的通知栏。（根据谷歌的官方文档不推荐这么做，因为使用这种方式时，对不同屏幕进行适配需要考虑的因素太多。而且，通知栏应该展示的就是最简明扼要的信息，对于大多数程序默认的布局已经足够了。）

//自定义布局的通知    public void customLayoutNotice(View view) {        Builder mBuilder = new Builder(this);        mBuilder.setTicker(通知标题6);        mBuilder.setTicker(通知标题6);        mBuilder.setSmallIcon(R.drawable.ic_launcher);        RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.custom_layout_notice);        mBuilder.setContent(remoteViews);        //为RemoteViews上的按钮设置文字        remoteViews.setCharSequence(R.id.custom_layout_button1, setText, Button1);        remoteViews.setCharSequence(R.id.custom_layout_button2, setText, Button2);        //为RemoteViews上的按钮设置点击事件        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());    }