diff --git a/common/include/input_hub.cpp b/common/include/input_hub.cpp
index d07e90fe278ff6e8e33d1de84c0dedac8e77d0dc..13a766feaa70802628862be7343c77d954682374 100644
--- a/common/include/input_hub.cpp
+++ b/common/include/input_hub.cpp
@@ -42,6 +42,7 @@ namespace DistributedInput {
 namespace {
 const uint32_t SLEEP_TIME_US = 100 * 1000;
 const std::string MOUSE_NODE_KEY = "mouse";
+const uint32_t SPACELENGTH = 1024;
 }
 
 InputHub::InputHub(bool isPluginMonitor) : epollFd_(-1), iNotifyFd_(-1), inputWd_(-1),
@@ -303,9 +304,6 @@ void InputHub::RecordDeviceChangeStates(Device *device, struct input_event readB
 size_t InputHub::CollectEvent(RawEvent *buffer, size_t &capacity, Device *device, struct input_event readBuffer[],
     const size_t count)
 {
-    if (capacity < 1) {
-        return 0;
-    }
     std::vector<bool> needFilted(capacity, false);
     bool isTouchEvent = false;
     if ((device->classes & INPUT_DEVICE_CLASS_TOUCH_MT) || (device->classes & INPUT_DEVICE_CLASS_TOUCH)) {
@@ -330,6 +328,9 @@ size_t InputHub::CollectEvent(RawEvent *buffer, size_t &capacity, Device *device
         RecordEventLog(event);
         event += 1;
         capacity -= 1;
+        if (capacity == 0) {
+            break;
+        }
     }
     return event - buffer;
 }
@@ -951,9 +952,7 @@ int32_t InputHub::QueryLocalTouchScreenInfo(int fd, std::unique_ptr<Device> &dev
 
 std::string InputHub::StringPrintf(const char *format, ...) const
 {
-    static const int spaceLength = 1024;
-    char space[spaceLength] = {0};
-
+    char space[SPACELENGTH] = {0};
     va_list ap;
     va_start(ap, format);
     std::string result;
diff --git a/interfaces/ipc/include/distributed_input_client.h b/interfaces/ipc/include/distributed_input_client.h
index 4ab262795c737ceb090bca8473fa524aefbf50f3..3a694a26a9f2d9d4c4d8624d02b2b10ff08beddc 100644
--- a/interfaces/ipc/include/distributed_input_client.h
+++ b/interfaces/ipc/include/distributed_input_client.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2024 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -44,6 +44,7 @@ namespace DistributedHardware {
 namespace DistributedInput {
 class DistributedInputClient {
 public:
+    DistributedInputClient();
     ~DistributedInputClient(){};
 
     static DistributedInputClient &GetInstance();
@@ -169,7 +170,6 @@ public:
     };
 
 private:
-    DistributedInputClient();
     bool IsJsonData(std::string strData) const;
     void AddWhiteListInfos(const std::string &deviceId, const std::string &strJson) const;
     void DelWhiteListInfos(const std::string &deviceId) const;
diff --git a/interfaces/ipc/src/distributed_input_client.cpp b/interfaces/ipc/src/distributed_input_client.cpp
index 36948f40c2c1dbe64f6596a75c40bd31765a09f7..83b2125acf335c3a4273fba08369de664e6fa044 100644
--- a/interfaces/ipc/src/distributed_input_client.cpp
+++ b/interfaces/ipc/src/distributed_input_client.cpp
@@ -33,7 +33,7 @@
 namespace OHOS {
 namespace DistributedHardware {
 namespace DistributedInput {
-std::shared_ptr<DistributedInputClient> DistributedInputClient::instance(new DistributedInputClient());
+std::shared_ptr<DistributedInputClient> DistributedInputClient::instance = std::make_shared<DistributedInputClient>();
 DistributedInputClient::DistributedInputClient() : isAddWhiteListCbReg(false), isDelWhiteListCbReg(false),
     isNodeMonitorCbReg(false), isSimulationEventCbReg(false), isSharingDhIdsReg(false), isGetSinkScreenInfosCbReg(false)
 {