增加初始化完成等待

lib/qm_tj.dart

@@ -17,6 +17,7 @@ class QMTJ {
   static Page _page;
   static Tap _tap;
   static Exposure _exposure;
+  static Future<bool> _ready;
 
   static void debug() {
     Utils.debug();
@@ -39,6 +40,7 @@ class QMTJ {
     _tap = Tap(_db);
     _exposure = Exposure(_db);
     _db.init();
+    _ready = new Future.value(true);
     Future.delayed(Duration(seconds: 5)).then((value) async {
       await _app.upload();
       await _page.upload();
@@ -49,23 +51,27 @@ class QMTJ {
 
   /// APP 可见
   static void onAppResume({Map<String, dynamic> extras}) async {
+    await _ready;
     _app.onResume(extras: extras);
   }
 
   /// APP 不可见
   static void onAppPause() async {
+    await _ready;
     _app.onPause();
   }
 
   /// PAGE 可见
   static void onPageResume(
       {String pageId, String lastPageId, Map<String, dynamic> extras}) async {
+    await _ready;
     _page.onResume(pageId: pageId, lastPageId: lastPageId, extras: extras);
   }
 
   /// PAGE 不可见
   static void onPagePause(
       {String pageId, String lastPageId, Map<String, dynamic> extras}) async {
+    await _ready;
     _page.onPause(pageId: pageId, lastPageId: lastPageId, extras: extras);
   }
 
@@ -75,6 +81,7 @@ class QMTJ {
   /// [extras] 点击参数
   static void tap(
       {String pageId, String clickId, Map<String, dynamic> extras}) async {
+    await _ready;
     _tap.onTap(pageId: pageId, clickId: clickId, extras: extras);
   }
 
@@ -84,6 +91,7 @@ class QMTJ {
   /// [extras] 曝光参数
   static void exposure(
       {String pageId, String exposureId, Map<String, dynamic> extras}) async {
+    await _ready;
     _exposure.onExposure(
         pageId: pageId, exposureId: exposureId, extras: extras);
   }