diff --git a/app/src/main/java/com/stand/standapp/AndroidInterface.kt b/app/src/main/java/com/stand/standapp/AndroidInterface.kt
index 3184845..b6b2ce6 100644
--- a/app/src/main/java/com/stand/standapp/AndroidInterface.kt
+++ b/app/src/main/java/com/stand/standapp/AndroidInterface.kt
@@ -287,12 +287,12 @@ class AndroidInterface(private val activity: MainActivity) {
         val zipPath = LogManager.zipLogs(activity)
         if (zipPath != null) {
             Handler(Looper.getMainLooper()).post {
-                Toast.makeText(activity, "日志已打包: $zipPath", Toast.LENGTH_LONG).show()
+                Toast.makeText(activity.applicationContext, "日志已打包: $zipPath", Toast.LENGTH_LONG).show()
             }
             return zipPath
         } else {
             Handler(Looper.getMainLooper()).post {
-                Toast.makeText(activity, "暂无日志或打包失败", Toast.LENGTH_SHORT).show()
+                Toast.makeText(activity.applicationContext, "暂无日志或打包失败", Toast.LENGTH_SHORT).show()
             }
             return ""
         }
@@ -301,7 +301,7 @@ class AndroidInterface(private val activity: MainActivity) {
     fun uploadLogs() {
         LogManager.uploadLogs(activity) { success, message ->
             Handler(Looper.getMainLooper()).post {
-                Toast.makeText(activity, if (success) "日志上传成功" else "上传失败: $message", Toast.LENGTH_SHORT).show()
+                Toast.makeText(activity.applicationContext, if (success) "日志上传成功" else "上传失败: $message", Toast.LENGTH_SHORT).show()
             }
         }
     }
@@ -312,7 +312,7 @@ class AndroidInterface(private val activity: MainActivity) {
      */
     fun printPage() {
         Handler(Looper.getMainLooper()).post {
-            Toast.makeText(activity, "GeckoView 暂不支持系统打印，请使用热敏打印功能", Toast.LENGTH_SHORT).show()
+            Toast.makeText(activity.applicationContext, "GeckoView 暂不支持系统打印，请使用热敏打印功能", Toast.LENGTH_SHORT).show()
         }
     }
 
@@ -322,7 +322,7 @@ class AndroidInterface(private val activity: MainActivity) {
             Timber.tag("Print").d("收到 H5 原始打印数据: $data")
             Handler(Looper.getMainLooper()).post {
                 try {
-                    Toast.makeText(activity, "H5指令打印: $data", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(activity.applicationContext, "H5指令打印: $data", Toast.LENGTH_SHORT).show()
                 } catch (e: Exception) {
                     Timber.tag("Print").e(e, "Toast显示失败")
                 }
@@ -413,7 +413,7 @@ class AndroidInterface(private val activity: MainActivity) {
         try {
             activity.getSharedPreferences("msg_records", Context.MODE_PRIVATE).edit().clear().apply()
             Handler(Looper.getMainLooper()).post {
-                Toast.makeText(activity, "记录已清空", Toast.LENGTH_SHORT).show()
+                Toast.makeText(activity.applicationContext, "记录已清空", Toast.LENGTH_SHORT).show()
             }
         } catch (e: Exception) {
             Timber.tag("Storage").e(e, "清空记录异常")
diff --git a/app/src/main/java/com/stand/standapp/LoginActivity.kt b/app/src/main/java/com/stand/standapp/LoginActivity.kt
index fa049b5..94ed468 100644
--- a/app/src/main/java/com/stand/standapp/LoginActivity.kt
+++ b/app/src/main/java/com/stand/standapp/LoginActivity.kt
@@ -56,7 +56,7 @@ class LoginActivity : AppCompatActivity() {
             val password = etPassword.text.toString().trim()
 
             if (username.isEmpty() || password.isEmpty()) {
-                Toast.makeText(this, "请输入账号和密码", Toast.LENGTH_SHORT).show()
+                Toast.makeText(applicationContext, "请输入账号和密码", Toast.LENGTH_SHORT).show()
                 return@setOnClickListener
             }
 
@@ -70,7 +70,7 @@ class LoginActivity : AppCompatActivity() {
             val password = etPassword.text.toString().trim()
 
             if (username.isEmpty() || password.isEmpty()) {
-                Toast.makeText(this, "请输入账号和密码", Toast.LENGTH_SHORT).show()
+                Toast.makeText(applicationContext, "请输入账号和密码", Toast.LENGTH_SHORT).show()
                 return@setOnClickListener
             }
 
@@ -97,10 +97,10 @@ class LoginActivity : AppCompatActivity() {
 
             if (clickCount >= 10) {
                 clickCount = 0
-                Toast.makeText(this, "开发者模式已激活", Toast.LENGTH_SHORT).show()
+                Toast.makeText(applicationContext, "开发者模式已激活", Toast.LENGTH_SHORT).show()
                 startActivity(Intent(this, DeveloperActivity::class.java))
             } else if (clickCount > 5) {
-                Toast.makeText(this, "再点击 ${10 - clickCount} 次进入调试模式", Toast.LENGTH_SHORT).show()
+                Toast.makeText(applicationContext, "再点击 ${10 - clickCount} 次进入调试模式", Toast.LENGTH_SHORT).show()
             }
         }
     }
@@ -130,7 +130,7 @@ class LoginActivity : AppCompatActivity() {
             override fun onFailure(call: Call, e: IOException) {
                 runOnUiThread {
                     loadingDialog.dismiss()
-                    Toast.makeText(this@LoginActivity, "网络异常: ${e.message}", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(applicationContext, "网络异常: ${e.message}", Toast.LENGTH_SHORT).show()
                 }
             }
 
@@ -156,7 +156,7 @@ class LoginActivity : AppCompatActivity() {
                             val loginData = data?.toString() ?: "{}"
                             val accessToken = data?.optString("access_token", "") ?: ""
 
-                            Toast.makeText(this@LoginActivity, "登录成功", Toast.LENGTH_SHORT).show()
+                            Toast.makeText(applicationContext, "登录成功", Toast.LENGTH_SHORT).show()
 
                             // 获取独立的 PTT 账号并初始化
                             initPttWithAccount(username, accessToken)
@@ -183,12 +183,12 @@ class LoginActivity : AppCompatActivity() {
                             finish()
                         } else {
                             val msg = json.optString("msg", "登录失败")
-                            Toast.makeText(this@LoginActivity, msg, Toast.LENGTH_SHORT).show()
+                            Toast.makeText(applicationContext, msg, Toast.LENGTH_SHORT).show()
                         }
 
                     } catch (e: Exception) {
                         Timber.tag("Login").e(e, "解析响应失败")
-                        Toast.makeText(this@LoginActivity, "服务器响应异常", Toast.LENGTH_SHORT).show()
+                        Toast.makeText(applicationContext, "服务器响应异常", Toast.LENGTH_SHORT).show()
                     }
                 }
             }
@@ -212,7 +212,7 @@ class LoginActivity : AppCompatActivity() {
         btnReset.setOnClickListener {
             etServerUrl.setText(AppConfig.DEFAULT_SERVER_URL)
             etSerialPort.setText(AppConfig.DEFAULT_SERIAL_PORT)
-            Toast.makeText(this, "已重置数值 (待保存)", Toast.LENGTH_SHORT).show()
+            Toast.makeText(applicationContext, "已重置数值 (待保存)", Toast.LENGTH_SHORT).show()
         }
 
         dialogView.findViewById<TextView>(R.id.btn_cancel).setOnClickListener {
@@ -231,7 +231,7 @@ class LoginActivity : AppCompatActivity() {
             AppConfig.setServerUrl(this, serverUrl)
             AppConfig.setSerialPort(this, serialPort)
             
-            Toast.makeText(this, "参数已生效", Toast.LENGTH_SHORT).show()
+            Toast.makeText(applicationContext, "参数已生效", Toast.LENGTH_SHORT).show()
             dialog.dismiss()
         }
 
@@ -351,10 +351,8 @@ class LoginActivity : AppCompatActivity() {
     }
 
     private fun doPttInit(pttUsername: String, pttPassword: String) {
-        runOnUiThread {
-            if (!isFinishing) {
-                Toast.makeText(this@LoginActivity, "PTT初始化中...", Toast.LENGTH_SHORT).show()
-            }
+        android.os.Handler(android.os.Looper.getMainLooper()).post {
+            Toast.makeText(applicationContext, "PTT初始化中...", Toast.LENGTH_SHORT).show()
         }
 
         // 1. PTT 引擎强制重置后登录 (销毁旧 session，确保干净状态)
diff --git a/app/src/main/java/com/stand/standapp/UpdateManager.kt b/app/src/main/java/com/stand/standapp/UpdateManager.kt
index 580c368..9c6b418 100644
--- a/app/src/main/java/com/stand/standapp/UpdateManager.kt
+++ b/app/src/main/java/com/stand/standapp/UpdateManager.kt
@@ -70,7 +70,7 @@ class UpdateManager(private val context: Context) {
                 try {
                     val body = response.body?.string() ?: throw IOException("返回内容为空")
                     if (!response.isSuccessful) {
-                        handler.post { Toast.makeText(context, "更新检查失败: ${response.code}", Toast.LENGTH_SHORT).show() }
+                        handler.post { Toast.makeText(context.applicationContext, "更新检查失败: ${response.code}", Toast.LENGTH_SHORT).show() }
                         return
                     }
                     
@@ -89,23 +89,23 @@ class UpdateManager(private val context: Context) {
                                         try {
                                             showUpdateDialog(versionName, content, id)
                                         } catch (e: Exception) {
-                                            Toast.makeText(context, "显示更新弹窗失败", Toast.LENGTH_SHORT).show()
+                                            Toast.makeText(context.applicationContext, "显示更新弹窗失败", Toast.LENGTH_SHORT).show()
                                         }
                                     }
                                 }
                             } else {
-                                handler.post { Toast.makeText(context, "当前已是最新版本", Toast.LENGTH_SHORT).show() }
+                                handler.post { Toast.makeText(context.applicationContext, "当前已是最新版本", Toast.LENGTH_SHORT).show() }
                             }
                         } else {
-                            handler.post { Toast.makeText(context, "当前已是最新版本", Toast.LENGTH_SHORT).show() }
+                            handler.post { Toast.makeText(context.applicationContext, "当前已是最新版本", Toast.LENGTH_SHORT).show() }
                         }
                     } else {
                         val msg = json.optString("msg", "未知错误")
-                        handler.post { Toast.makeText(context, "更新服务提示: $msg", Toast.LENGTH_SHORT).show() }
+                        handler.post { Toast.makeText(context.applicationContext, "更新服务提示: $msg", Toast.LENGTH_SHORT).show() }
                     }
                 } catch (e: Exception) {
                     Timber.tag("UpdateManager").e(e, "解析或处理更新结果失败")
-                    handler.post { Toast.makeText(context, "更新信息解析失败", Toast.LENGTH_SHORT).show() }
+                    handler.post { Toast.makeText(context.applicationContext, "更新信息解析失败", Toast.LENGTH_SHORT).show() }
                 }
             }
         })
@@ -150,7 +150,7 @@ class UpdateManager(private val context: Context) {
             override fun onFailure(call: Call, e: IOException) {
                 handler.post {
                     progressDialog?.dismiss()
-                    Toast.makeText(context, "连接服务器失败", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(context.applicationContext, "连接服务器失败", Toast.LENGTH_SHORT).show()
                 }
             }
 
@@ -158,7 +158,7 @@ class UpdateManager(private val context: Context) {
                 if (!response.isSuccessful) {
                     handler.post {
                         progressDialog?.dismiss()
-                        Toast.makeText(context, "下载失败: ${response.code}", Toast.LENGTH_SHORT).show()
+                        Toast.makeText(context.applicationContext, "下载失败: ${response.code}", Toast.LENGTH_SHORT).show()
                     }
                     return
                 }
@@ -169,7 +169,7 @@ class UpdateManager(private val context: Context) {
                     } catch (e: Exception) {
                         handler.post {
                             progressDialog?.dismiss()
-                            Toast.makeText(context, "保存失败", Toast.LENGTH_SHORT).show()
+                            Toast.makeText(context.applicationContext, "保存失败", Toast.LENGTH_SHORT).show()
                         }
                     }
                 }
@@ -210,13 +210,13 @@ class UpdateManager(private val context: Context) {
             
             handler.post {
                 progressDialog?.dismiss()
-                Toast.makeText(context, "下载完成，文件已保存到系统下载目录", Toast.LENGTH_SHORT).show()
+                Toast.makeText(context.applicationContext, "下载完成，文件已保存到系统下载目录", Toast.LENGTH_SHORT).show()
                 installApk(targetUri)
             }
         } catch (e: Exception) {
             handler.post {
                 progressDialog?.dismiss()
-                Toast.makeText(context, "保存失败: ${e.message}", Toast.LENGTH_LONG).show()
+                Toast.makeText(context.applicationContext, "保存失败: ${e.message}", Toast.LENGTH_LONG).show()
             }
         } finally {
             inputStream?.close()
@@ -246,7 +246,7 @@ class UpdateManager(private val context: Context) {
                     val intent = Intent(android.provider.Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES)
                     intent.data = Uri.parse("package:" + context.packageName)
                     context.startActivity(intent)
-                    Toast.makeText(context, "请先授予安装权限", Toast.LENGTH_SHORT).show()
+                    Toast.makeText(context.applicationContext, "请先授予安装权限", Toast.LENGTH_SHORT).show()
                     return
                 }
             }
@@ -267,7 +267,7 @@ class UpdateManager(private val context: Context) {
             context.startActivity(intent)
         } catch (e: Exception) {
             Timber.tag("UpdateManager").e(e, "安装失败")
-            Toast.makeText(context, "无法自动调起安装，请在系统下载目录中手动安装", Toast.LENGTH_LONG).show()
+            Toast.makeText(context.applicationContext, "无法自动调起安装，请在系统下载目录中手动安装", Toast.LENGTH_LONG).show()
         }
     }
 }
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 f1403d1..3385c40 100644
--- a/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt
+++ b/app/src/main/java/com/stand/standapp/printer/PrinterManager.kt
@@ -26,9 +26,9 @@ object PrinterManager {
             // 在 Android 系统层面主动提示
             mContext?.let {
                 if (!hasPaper) {
-                    android.widget.Toast.makeText(it, "⚠️ 警告：打印机缺纸！", android.widget.Toast.LENGTH_LONG).show()
+                    android.widget.Toast.makeText(it.applicationContext, "⚠️ 警告：打印机缺纸！", android.widget.Toast.LENGTH_LONG).show()
                 } else {
-                    android.widget.Toast.makeText(it, "打印机状态：正常 (有纸)", android.widget.Toast.LENGTH_SHORT).show()
+                    android.widget.Toast.makeText(it.applicationContext, "打印机状态：正常 (有纸)", android.widget.Toast.LENGTH_SHORT).show()
                 }
             }