1. 通知的使用

在 Android 8.0 后，通知需要添加 channel ，所以需要添加版本区别

    public void showNotifictionIcon(Context context) {
        try {
            NotificationCompat.Builder builder = null;
            NotificationManager manager = null;
            int Notification_id = 1;
            if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
                NotificationChannel channel = new NotificationChannel(String.valueOf(Notification_id), "bweakeup", NotificationManager.IMPORTANCE_DEFAULT);
                channel.enableLights(true); //是否在桌面icon右上角展示小红点
                channel.setLightColor(Color.GREEN); //小红点颜色
                channel.setShowBadge(true); //是否在久按桌面图标时显示此渠道的通知
                manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                manager.createNotificationChannel(channel);
                builder = new NotificationCompat.Builder(context, "" + Notification_id);
            }else{
                builder = new NotificationCompat.Builder(context);
                manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            }
            Log.i("Wooo", "showNotifictionIcon in");

            Intent intent = new Intent(context, NotActivity.class);//只显示通知，无页面跳转
            builder.setAutoCancel(true);//点击后消失
            builder.setSmallIcon(R.drawable.app_icon);//设置通知栏消息标题的头像
            builder.setDefaults(NotificationCompat.DEFAULT_SOUND);//设置通知铃声
            builder.setTicker("状态栏显示的文字");
            builder.setContentTitle("新消息...");
            long cTime = System.currentTimeMillis();
            builder.setContentText("当前时间 ：" + cTime);
            //利用PendingIntent来包装我们的intent对象,使其延迟跳转
            PendingIntent intentPend = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
            builder.setContentIntent(intentPend);


            manager.notify(0x1234, builder.build());
            Log.i("Wooo", "showNotifictionIcon out ");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

2. 通知成功与否的监听

1. AndroidManifest.xml 添加 service

        <service android:name=".abstest.NLService"
            android:label="通知测试"
            android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
            <intent-filter>
                <action android:name="android.service.notification.NotificationListenerService"/>
            </intent-filter>
        </service>

2. 编写 NLService 类

@RequiresApi(Build.VERSION_CODES.KITKAT)
public class NLService extends NotificationListenerService {
    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {
        super.onNotificationPosted(sbn);
        String pkgName = sbn.getPackageName();
        Context ctx = this.getApplicationContext();
        Log.i("Wooo", "onNotificationPosted in : " + pkgName);
        if (pkgName.equals("***.***.***")) {
            Log.i("Wooo", "onNotificationPosted send success");
        }
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        super.onNotificationRemoved(sbn);
        Log.i("Wooo", "onNotificationRemoved in");
    }
}

3. 权限申请

在应用启动时请求通知监听权限

        if (!notificationListenerEnable()) {
            gotoNotificationAccessSetting(this.getApplicationContext());
        }

    private boolean notificationListenerEnable() {
        Log.i("Wooo", "notificationListenerEnable in");
        boolean enable = false;
        String packageName = getPackageName();
        String flat= Settings.Secure.getString(getContentResolver(),"enabled_notification_listeners");
        if (flat != null) {
            enable= flat.contains(packageName);
        }
        return enable;
    }

    private boolean gotoNotificationAccessSetting(Context context) {
        try {
            Log.i("Wooo", "gotoNotificationAccessSetting in");
            Intent intent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(intent);
            return true;
        } catch(ActivityNotFoundException e) {
            try {
                Intent intent = new Intent();
                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                ComponentName cn = new ComponentName("com.android.settings","com.android.settings.Settings$NotificationAccessSettingsActivity");
                intent.setComponent(cn);
                intent.putExtra(":settings:show_fragment", "NotificationAccessSettings");
                context.startActivity(intent);
                return true;
            } catch(Exception ex) {
                ex.printStackTrace();
            }
            return false;
        }
    }

这样，在允许了权限后，应用发送通知，当成功后， Listener 就会产生回调。