diff --git a/app/src/main/java/com/example/kingway/ptt/AudioRecordManager.java b/app/src/main/java/com/example/kingway/ptt/AudioRecordManager.java
index 10e3f2d..147e29c 100644
--- a/app/src/main/java/com/example/kingway/ptt/AudioRecordManager.java
+++ b/app/src/main/java/com/example/kingway/ptt/AudioRecordManager.java
@@ -75,6 +75,29 @@ public class AudioRecordManager {
         return mInstance;
     }
 
+    /**
+     * 彻底销毁单例及相关资源
+     */
+    public static void destroy() {
+        if (mInstance != null) {
+            synchronized (AudioRecordManager.class) {
+                if (mInstance != null) {
+                    try {
+                        mInstance.destroyAudio();
+                    } catch (Exception e) {
+                        Timber.tag("AudioRecordManager").e(e, "destroyAudio error");
+                    }
+                    try {
+                        mInstance.destroyThread();
+                    } catch (Exception e) {
+                        Timber.tag("AudioRecordManager").e(e, "destroyThread error");
+                    }
+                    mInstance = null;
+                }
+            }
+        }
+    }
+
     /**
      * 销毁线程方法
      */
diff --git a/app/src/main/java/com/stand/standapp/MainActivity.kt b/app/src/main/java/com/stand/standapp/MainActivity.kt
index 2f8dd07..deef858 100644
--- a/app/src/main/java/com/stand/standapp/MainActivity.kt
+++ b/app/src/main/java/com/stand/standapp/MainActivity.kt
@@ -532,18 +532,18 @@ class MainActivity : AppCompatActivity() {
 
             // 4. Stop and destroy AudioRecord
             try {
-                com.example.kingway.ptt.AudioRecordManager.getInstance().destroyAudio()
+                com.example.kingway.ptt.AudioRecordManager.destroy()
                 Timber.tag("MainActivity").i("AudioRecordManager destroyed")
             } catch (e: Exception) {
                 Timber.tag("MainActivity").e(e, "AudioRecordManager destroy failed")
             }
 
-            // 5. Close printer connection
+            // 5. Close printer connection and reset
             try {
-                com.stand.standapp.printer.PrinterManager.getFactory()?.ClosePort()
-                Timber.tag("MainActivity").i("Printer port closed")
+                com.stand.standapp.printer.PrinterManager.destroy()
+                Timber.tag("MainActivity").i("Printer destroyed")
             } catch (e: Exception) {
-                Timber.tag("MainActivity").e(e, "Printer close failed")
+                Timber.tag("MainActivity").e(e, "Printer destroy failed")
             }
 
             // 6. Clear Access Token
diff --git a/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt b/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt
index 3385c40..bc6226a 100644
--- a/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt
+++ b/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt
@@ -8,12 +8,13 @@ import com.dp.dp_serialportlist.Serialport_Factory
 import com.stand.standapp.AppConfig
 import timber.log.Timber
 import java.util.concurrent.Executors
+import java.util.concurrent.ScheduledExecutorService
 import java.util.concurrent.TimeUnit
 
 object PrinterManager {
     private var sf: Serialport_Factory? = null
     private var isConnecting = false
-    private val executor = Executors.newSingleThreadScheduledExecutor()
+    private var executor: ScheduledExecutorService? = null
     private var mContext: Context? = null
     private var hasPaper: Boolean = true // 默认为有纸
 
@@ -43,6 +44,9 @@ object PrinterManager {
     fun init(context: Context) {
         if (sf != null) return
         mContext = context.applicationContext
+        if (executor == null || executor!!.isShutdown) {
+            executor = Executors.newSingleThreadScheduledExecutor()
+        }
         
         // Serialport_Factory 构造函数内部会创建 Handler，必须在有 Looper 的线程（如主线程）调用
         mHandler.post {
@@ -51,9 +55,9 @@ object PrinterManager {
                 sf = Serialport_Factory.getSerialport_Factory(mContext, mHandler)
                 
                 // 成功创建 factory 后，将后续耗时的连接任务丢给子线程
-                executor.execute {
+                executor?.execute {
                     // 启动自动重连定时任务
-                    executor.scheduleWithFixedDelay({
+                    executor?.scheduleWithFixedDelay({
                         checkAndConnect()
                     }, 0, 10, TimeUnit.SECONDS)
                 }
@@ -65,6 +69,26 @@ object PrinterManager {
         }
     }
 
+    fun destroy() {
+        Timber.tag("Printer").i("正在销毁并重置打印机组件...")
+        try {
+            executor?.shutdownNow()
+            executor = null
+        } catch (e: Exception) {
+            Timber.tag("Printer").e(e, "关闭打印机线程池异常")
+        }
+        try {
+            sf?.ClosePort()
+            sf = null
+        } catch (e: Exception) {
+            Timber.tag("Printer").e(e, "关闭打印机串口异常")
+        }
+        mContext = null
+        isConnecting = false
+        hasPaper = true
+        Timber.tag("Printer").i("打印机组件销毁完成")
+    }
+
     @Synchronized
     private fun checkAndConnect() {
         val factory = sf ?: return
diff --git a/app/src/main/java/com/stand/standapp/utils/GpioManager.kt b/app/src/main/java/com/stand/standapp/utils/GpioManager.kt
index dfa9b20..351ad29 100644
--- a/app/src/main/java/com/stand/standapp/utils/GpioManager.kt
+++ b/app/src/main/java/com/stand/standapp/utils/GpioManager.kt
@@ -58,6 +58,10 @@ object GpioManager {
         mIsRunning = false
         mThread?.interrupt()
         mThread = null
+        mZysjSystemManager = null
+        isSpeaking = false
+        lastGpioValue = 1
+        Timber.tag("GPIO").i("GPIO listening stopped and state reset")
     }
 
     private var isSpeaking = false