如果线程已经执行，则跳过

app/src/main/cpp/GPIOControl.cpp

@@ -496,6 +496,10 @@ void GpioControl::PowerControlThreadProc()
 
 bool GpioControl::Startup()
 {
+    if (m_thread.joinable())
+    {
+        return true;
+    }
     // if (m_thread.)
     m_exitSignal = false;
     m_thread = std::thread(PowerControlThreadProc);