diff --git a/frameworks/common/text.cpp b/frameworks/common/text.cpp
index 546abc380246743b59028bae5f80347e06ab69bf..c9899ce825559a99e9c047faaf70d9b2846e7ce2 100644
--- a/frameworks/common/text.cpp
+++ b/frameworks/common/text.cpp
@@ -430,7 +430,7 @@ uint32_t Text::CalculateLineWithEllipsis(uint32_t begin, uint32_t textLen, int16
 
 uint32_t Text::GetTextStrLen()
 {
-    return strlen(text_);
+    return (text_ != nullptr) ? (strlen(text_)) : 0;
 }
 
 uint32_t Text::GetTextLine(uint32_t begin, uint32_t textLen, int16_t width, uint16_t lineNum, uint8_t letterSpace,
diff --git a/frameworks/imgdecode/cache_manager.cpp b/frameworks/imgdecode/cache_manager.cpp
index a9fb4037fea0391c76b67afbf7db90406b0253b1..043e1b883606d52781a7ab8b6c483eed1cd8ae64 100644
--- a/frameworks/imgdecode/cache_manager.cpp
+++ b/frameworks/imgdecode/cache_manager.cpp
@@ -132,7 +132,7 @@ RetCode CacheManager::Open(const char* path, const Style& style, CacheEntry& ent
     }
 
     SelectEntryToReplace(indexHitted);
-    if (entryArr_[indexHitted].dsc_.path != nullptr) {
+    if ((entryArr_[indexHitted].dsc_.path != nullptr) && (entryArr_[indexHitted].dsc_.decoder != nullptr)) {
         entryArr_[indexHitted].dsc_.decoder->Close(entryArr_[indexHitted].dsc_);
     }
 
@@ -161,13 +161,11 @@ RetCode CacheManager::Close(const char* path)
                 continue;
             }
             if (strcmp(entryArr_[index].dsc_.path, path) == 0) {
-                entryArr_[index].dsc_.decoder->Close(entryArr_[index].dsc_);
                 Clear(entryArr_[index]);
                 break;
             }
         } else {
             if (entryArr_[index].dsc_.path == path) {
-                entryArr_[index].dsc_.decoder->Close(entryArr_[index].dsc_);
                 Clear(entryArr_[index]);
                 break;
             }
@@ -199,7 +197,6 @@ RetCode CacheManager::Reset()
 
     for (uint16_t index = 0; index < GetSize(); index++) {
         if (entryArr_[index].dsc_.path != nullptr) {
-            entryArr_[index].dsc_.decoder->Close(entryArr_[index].dsc_);
             Clear(entryArr_[index]);
         }
     }
@@ -209,6 +206,9 @@ RetCode CacheManager::Reset()
 
 RetCode CacheManager::ReadToCache(CacheEntry& entry)
 {
+    if (entry.dsc_.decoder == nullptr) {
+        return RetCode::FAIL;
+    }
     return entry.dsc_.decoder->ReadToCache(entry.dsc_);
 }
 
diff --git a/interfaces/kits/components/ui_canvas.h b/interfaces/kits/components/ui_canvas.h
index 44cfe304a3481e1d79ea7264ecb92f9a795448ec..819e15a7e89008a268c4514ea990e72028480059 100644
--- a/interfaces/kits/components/ui_canvas.h
+++ b/interfaces/kits/components/ui_canvas.h
@@ -482,8 +482,14 @@ protected:
         uint8_t fontOpa;
         FontStyle fontStyle;
         Text* textComment;
-        TextParam()
+        TextParam() : text(nullptr), position({0, 0}), fontOpa(0)
         {
+            fontColor.full = 0;
+            fontStyle.direct = UITextLanguageDirect::TEXT_DIRECT_LTR;
+            fontStyle.align = UITextLanguageAlignment::TEXT_ALIGNMENT_LEFT;
+            fontStyle.fontSize = 0;
+            fontStyle.letterSpace = 0;
+            fontStyle.fontName = nullptr;
             textComment = new Text;
         }
 
diff --git a/tools/qt/simulator/uitest/main_widget.cpp b/tools/qt/simulator/uitest/main_widget.cpp
index 4b9db5c6a669ad194fec276fc9ab1715a69a970e..c2f6b71bd841202004dca6533faf9d0d7f88dfb5 100644
--- a/tools/qt/simulator/uitest/main_widget.cpp
+++ b/tools/qt/simulator/uitest/main_widget.cpp
@@ -19,15 +19,19 @@
 namespace OHOS {
 MainWidget::MainWidget(QWidget* parent) : QWidget(parent), guiThread_(nullptr), taskThread_(nullptr)
 {
-    ui_->setupUi(this);
-    CreateGUIThread();
-    CreateTaskThread();
-    CreateSocketThread();
+    if (ui_ != nullptr) {
+        ui_->setupUi(this);
+        CreateGUIThread();
+        CreateTaskThread();
+        CreateSocketThread();
+    }
 }
 
 MainWidget::~MainWidget()
 {
-    delete ui_;
+    if (ui_ != nullptr) {
+        delete ui_;
+    }
     if (guiThread_ != nullptr) {
         guiThread_->Quit();
         guiThread_->wait();