App设计：消息推送和界面路由跳转

@Override
public void onReceiveMessageData(Context context, GTTransmitMessage msg) {
    try {
        String payload =  new String(msg.getPayload());      
        PushManager.handlePushMsg(context, payload);
    } catch (Exception ex) {
      // log it.
    }
}

{
  title:"通知标题",
  content:"通知内容",
  payload: {
    type:"page",
    extra:{
      path:"/article/articleDetail",
      params:{
        "id":"10086"
      }      
    }
  }
}

class PushMessage implements Serializable {
  private String title;
  private String content;
  private Payload payload;
  ...
}

/**
 * PushMsgHandler基类
 * ，PushMsgHandler用来处理“某一个”PushMessage
 */

public abstract class BasePushMsgHandler {
    protected PushMessage mMessage;

    public BasePushMsgHandler(PushMessage message) {
        mMessage = message;
    }

    public abstract void handlePushMsg();
}

public abstract class BaseRoutePushHandler extends BasePushMsgHandler {
    public BaseRoutePushHandler(PushMessage message) {
        super(message);
    }

    @Override
    public void handlePushMsg(Context context) {
        BaseRouteMsg msg = getRouteMsg();
        if (msg != null) {
            RouterManager.navigate(context, msg);
        }
    }

    public abstract BaseRouteMsg getRouteMsg();
}

public abstract class BaseRouteMsg implements Serializable {
    private static int mIdSeed;
    static {
        // 设置mIdSeed初始值：
        // 允许0.1s一个的间隔，不会有超过8*100天的msg还没被处理
        long stamp = System.currentTimeMillis() / 100;
        mIdSeed  = (int) (stamp % (8 * 24 * 3600 * 1000));
    }
    private final int mMsgId = mIdSeed++;

    /**
     * 获取路由对应的path
     * @return route path
     * @see RouteMap
     */
    public abstract String getPath();

    /**
     * 消息编号，递增唯一(方便跨进程)。
     */
    public final int getMsgId() {
        return mMsgId;
    }
}

public class ArticleDetailMsg extends BaseRouteMsg {
    private int mArticleId;

    @Override
    public String getPath() {
        return RouteMap.PATH_ARTICLE_DETAIL;
    }

    public int getArticleId() {
        return mArticleId;
    }

    public void setArticleId(int articleId) {
        this.mArticleId = articleId;
    }
}

public final class RouteMap {
   public static final String PATH_ARTICLE_DETAIL = "articleDetail";

   public static BaseRouter getRouter(String path) {
        switch (path) {
            case RouteMap.PATH_ARTICLE_DETAIL:
                return new ArticleDetailRouter();
            default:
              return null;
        }
  }
}

public abstract class BaseRouter<T> {
    protected T mRouteMsg;

    /**
     * 路由操作的前置判断
     * @return 是否继续前往目标界面
     */
    public boolean canRoute(Context context) {
        return true;
    }

    /**
     * 执行导航到目标界面
     *
     * @return 导航成功？
     */
    public abstract boolean navigate(Context context);

    public void setRouteMsg(T msg) {
        mRouteMsg = msg;
    }
}

// 在PushIntentService.java中，这是sdk提供的接收推送消息的地方
public void onReceiveMessageData(Context context, GTTransmitMessage msg) {
    try {
        String payload =  new String(msg.getPayload());
         PushMessage message = PushMessage.build(payload);
        PushManager.handlePushMsg(context, message);
    } catch (Exception ex) {
    }
}

// PushManager.handlePushMsg()
public static void handlePushMsg(Context context, PushMessage message) throws Exception {
  BasePushMsgHandler pushHandler = PushHandlerManager.getPushHandler(message);

  if (pushHandler != null) {
      BaseRouteMsg routeMsg = pushHandler.getRouteMsg();

      if (routeMsg != null) {
          NotifiyManager.notifyRouteMsg(context, message.getTitle()
                  , message.getContent(), routeMsg);
      }
  }
}

/**
 * Post a notification to be shown in the status bar. If a notification with
 * the same tag and id has already been posted by your application and has not yet been
 * canceled, it will be replaced by the updated information.
 *
 * @param tag A string identifier for this notification.  May be {@code null}.
 * @param id An identifier for this notification.  The pair (tag, id) must be unique
 *        within your application.
 * @param notification A {@link Notification} object describing what to
 *        show the user. Must not be null.
 */
public void notify(String tag, int id, Notification notification)

private static void sendRouteNotification(Context context, String title, String content,
                                          String notificationTag, BaseRouteMsg msg) {
    Intent startIntent = RouteIntentService.getIntentOfActionDoRoute(context, msg);
    PendingIntent pendingIntent = PendingIntent.getService(context, DEFAULT_SERVICE_REQUEST_CODE,
            startIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder =
            new NotificationCompat.Builder(context)
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setContentTitle(title)
                    .setContentText(content)
                    .setAutoCancel(true)
                    .setContentIntent(pendingIntent);

    NotificationManager notifyMgr =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

    notifyMgr.notify(notificationTag, NOTIFICATION_ID, builder.build());
}

// RouteIntentService.onHandleIntent()
@Override
protected void onHandleIntent(Intent intent) {
    if (intent != null) {
        final String action = intent.getAction();
        if (ACTION_DO_ROUTE.equals(action)) {
            BaseRouteMsg routeMsg = (BaseRouteMsg) intent.getSerializableExtra(EXTRA_ROUTE_MSG);
            handleActionDoRoute(routeMsg);
        }
    }
}

// RouteIntentService.onHandleIntent()
/**
 * 处理路由跳转命令
 * @param routeMsg
 */
private void handleActionDoRoute(BaseRouteMsg routeMsg) {
    boolean jumpDone = false;
    try {
        if (routeMsg != null) {
            jumpDone = RouterManager.navigate(this, routeMsg);
        }
    } catch (Exception e) {
    }

    if (!jumpDone) {
        RouterManager.openApp(this);
    }
}

// 在RouterManager.navigate()
/**
 * 导航到目标界面
 *
 * @param msg 路由信息
 * @return 是否完成跳转
 */
public static boolean navigate(Context context, BaseRouteMsg msg) {
    BaseRouter router = RouteMap.getRouter(msg.getPath());

    if (router == null || !router.canJump(context)) {
        return false;
    }

    router.setRouteMsg(msg);
    return router.navigate(context);
}

public class ArticleDetailRouter extends BaseRouter<ArticleDetailMsg> {

    @Override
    public boolean navigate(Context context) {
        if (mRouteMsg == null) {
            return false;
        }
        ArticleDetailActivity.launchActivity(context, mRouteMsg.getArticleId());
        return true;
    }
}