android wear-创建Notification

一、通过手机发送通知给android手表，首先需要将手机和手表模拟器建立连接。

1.1 首先手机要下载android wear 中国版。
1.2 通过usb连接手机，打开android wear ，并且选择模拟器。
1.3 在命令行输入adb -d forward tcp:5601 tcp:5601 即可建立连接。

二、mobile下通过Notification Builder创建Notification。

        int notificationId = 001;
        Intent viewIntent = new Intent(this, MainActivity.class);
        int eventId  = 1;
        viewIntent.putExtra(EXTRA_EVENT_ID, eventId);
        PendingIntent viewPendingIntent = PendingIntent.getActivity(this, 0, viewIntent, 0);
        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("通过Notification Builder创建Notification")
                .setContentText("张X峰到甪直干活去了，太爽了！！！")
                .setContentIntent(viewPendingIntent);
        // Get an instance of the NotificationManager service 
        //获取NotificationManager 服务的一个实例
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
        // Build the notification and issues it with notification manager.
        // 使用notificationManager 来发出 Notification
        notificationManager.notify(notificationId, notificationBuilder.build());

当Notification出现在手机上时，用户可以通过点击通知打开MainActivity；当Notification出现在穿戴设备上时，用户可以左滑到open on phone 页面，点击打开MainActivity.

三、添加Action按钮

int notificationId = 001;
        Intent mainIntent = new Intent(this, MainActivity.class);
        int eventId  = 1;
        mainIntent.putExtra(EXTRA_EVENT_ID, eventId);
        PendingIntent mainPendingIntent = PendingIntent.getActivity(this, 0, mainIntent, 0);

        Intent viewIntent = new Intent(this, ViewEventActivity.class);
        int eventId2 = 2;
        viewIntent.putExtra(EXTRA_EVENT_ID, eventId2);
        PendingIntent viewPendingIntent = PendingIntent.getActivity(this, 0, viewIntent, 0);;

        //NotificationCompat.Style bigStyle;添加一个Big View
        NotificationCompat.BigTextStyle bigStyle = new NotificationCompat.BigTextStyle();
        String eventDescription = "额外扩展的内容：고마워 이토록 사랑해줘서," +
                "완전 환자야 환장해 너만 볼 팔자야,工作 吹牛 石头剪刀布三局两胜," +
                "일이고 나발이고 가위바위보 삼세판이고.";
        bigStyle.bigText(eventDescription);

        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this)
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setContentTitle("添加Action按钮")
                        .setContentText("信息")
                        .setContentIntent(mainPendingIntent)
                        .addAction(R.mipmap.map,
                                "地图", viewPendingIntent)
                        .setStyle(bigStyle);
        //获取NotificationManager 服务的一个实例
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
        // Build the notification and issues it with notification manager.
        // 使用notificationManager 来发出 Notification 
        notificationManager.notify(notificationId, notificationBuilder.build());

在穿戴设备上添加了一个action（类似于一个界面）。通过传递一个 PendingIntent 给 addAction() 来添加其它action（这个action也可以打开一个页面）。添加了一个Big View。

四、可穿戴式独有的 Actions

        Intent actionIntent = new Intent(this, ViewEventActivity.class);
        PendingIntent actionPendingIntent =
                PendingIntent.getActivity(this, 0, actionIntent,
                        PendingIntent.FLAG_UPDATE_CURRENT);

        // Create the action
        NotificationCompat.Action action =
                new NotificationCompat.Action.Builder(R.mipmap.ic_action,
                        getString(R.string.label), actionPendingIntent)
                        .build();

        // Build the notification and add the action via WearableExtender
        Notification notification =
                new NotificationCompat.Builder(this)
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setContentTitle("可穿戴式独有的 Actions")
                        .setContentText("开发者想要可穿戴式设备上的action与手持式设备不一样的话，" +
                                "可以使用 WearableExtender.addAction()，" +
                                "一旦我们通过这种方式添加了action，" +
                                "可穿戴式设备便不会显示任何其他通过" +
                                " NotificationCompat.Builder.addAction() 添加的action。")
                        .extend(new NotificationCompat.WearableExtender().addAction(action))
                        .build();
        //获取NotificationManager 服务的一个实例
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
        // Build the notification and issues it with notification manager.
        // 使用notificationManager 来发出 Notification 
        notificationManager.notify(notificationId, notification);

我认为是另一种添加action的方法。

五、为Notification添加可穿戴式特性

        int notificationId = 001;
        // Create a WearableExtender to add functionality for wearables
//        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.flower);
        NotificationCompat.WearableExtender wearableExtender =
                new NotificationCompat.WearableExtender()
                        .setHintHideIcon(true)
                        .setBackground(mBitmap);

        // Create a NotificationCompat.Builder to build a standard notification
        // then extend it with the WearableExtender
        Notification notif = new NotificationCompat.Builder(this)
                .setContentTitle("添加可穿戴式特性")
                .setContentText("调用 setHintHideIcon() 方法把应用的图标从 Notification 卡片上删掉")
                .setSmallIcon(R.mipmap.ic_launcher)
                //.setLargeIcon(BitmapFactory.decodeResource(
                       // getResources(), R.mipmap.ic_launcher))这是把图标放大，不适合背景
                .extend(wearableExtender)
                .build();
        //获取NotificationManager 服务的一个实例
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
        // Build the notification and issues it with notification manager. 
        notificationManager.notify(notificationId, notif);

添加可穿戴设备特性；调用 setHintHideIcon() 方法把应用的图标从 Notification 卡片上删掉。

具体DEMO可见：https://github.com/GoldenStrawberry/JJEWear