diff --git a/android/src/main/java/com/smartlibrary/android/service/SmartReminderService.java b/android/src/main/java/com/smartlibrary/android/service/SmartReminderService.java
index f6ae48e..2eda04b 100644
--- a/android/src/main/java/com/smartlibrary/android/service/SmartReminderService.java
+++ b/android/src/main/java/com/smartlibrary/android/service/SmartReminderService.java
@@ -272,7 +272,7 @@ public class SmartReminderService {
      */
     private void sendNotification(int notificationId, String channelId, String title, String content, int priority) {
         NotificationCompat.Builder builder = new NotificationCompat.Builder(context, channelId)
-                .setSmallIcon(R.drawable.ic_launcher_foreground)
+                .setSmallIcon(R.drawable.ic_notifications)
                 .setContentTitle(title)
                 .setContentText(content)
                 .setStyle(new NotificationCompat.BigTextStyle().bigText(content))
diff --git a/android/src/main/java/com/smartlibrary/android/ui/ImmersiveReadingActivity.java b/android/src/main/java/com/smartlibrary/android/ui/ImmersiveReadingActivity.java
index a1f245c..5c929e2 100644
--- a/android/src/main/java/com/smartlibrary/android/ui/ImmersiveReadingActivity.java
+++ b/android/src/main/java/com/smartlibrary/android/ui/ImmersiveReadingActivity.java
@@ -65,7 +65,8 @@ public class ImmersiveReadingActivity extends AppCompatActivity {
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
         
         immersiveService = ImmersiveReadingService.getInstance(this);
-        ttsService = TextToSpeechService.getInstance(this);
+        ttsService = TextToSpeechService.getInstance();
+        ttsService.initialize(this);
         
         initViews();
         applyCurrentTheme();
@@ -241,9 +242,32 @@ public class ImmersiveReadingActivity extends AppCompatActivity {
             Toast.makeText(this, "已停止朗读", Toast.LENGTH_SHORT).show();
         } else {
             String content = tvContent.getText().toString();
-            ttsService.speak(content);
-            isSpeaking = true;
-            btnSpeak.setText("⏹️ 停止");
+            ttsService.speak(content, new TextToSpeechService.TTSCallback() {
+                @Override
+                public void onStart() {
+                    runOnUiThread(() -> {
+                        isSpeaking = true;
+                        btnSpeak.setText("⏹️ 停止");
+                    });
+                }
+                
+                @Override
+                public void onComplete() {
+                    runOnUiThread(() -> {
+                        isSpeaking = false;
+                        btnSpeak.setText("🔊 朗读");
+                    });
+                }
+                
+                @Override
+                public void onError(String error) {
+                    runOnUiThread(() -> {
+                        isSpeaking = false;
+                        btnSpeak.setText("🔊 朗读");
+                        Toast.makeText(ImmersiveReadingActivity.this, "朗读失败: " + error, Toast.LENGTH_SHORT).show();
+                    });
+                }
+            });
             Toast.makeText(this, "开始朗读...", Toast.LENGTH_SHORT).show();
         }
     }
diff --git a/android/src/main/java/com/smartlibrary/android/ui/TranslationActivity.java b/android/src/main/java/com/smartlibrary/android/ui/TranslationActivity.java
index 0c29953..e509857 100644
--- a/android/src/main/java/com/smartlibrary/android/ui/TranslationActivity.java
+++ b/android/src/main/java/com/smartlibrary/android/ui/TranslationActivity.java
@@ -71,7 +71,8 @@ public class TranslationActivity extends AppCompatActivity {
         setContentView(R.layout.activity_translation);
         
         translationService = TranslationService.getInstance(this);
-        ttsService = TextToSpeechService.getInstance(this);
+        ttsService = TextToSpeechService.getInstance();
+        ttsService.initialize(this);
         
         initViews();
         setupLanguageSpinners();
@@ -244,7 +245,25 @@ public class TranslationActivity extends AppCompatActivity {
             return;
         }
         
-        ttsService.speak(text);
+        ttsService.speak(text, new TextToSpeechService.TTSCallback() {
+            @Override
+            public void onStart() {
+                runOnUiThread(() -> btnSpeak.setText("🔊 朗读中..."));
+            }
+            
+            @Override
+            public void onComplete() {
+                runOnUiThread(() -> btnSpeak.setText("🔊 朗读"));
+            }
+            
+            @Override
+            public void onError(String error) {
+                runOnUiThread(() -> {
+                    btnSpeak.setText("🔊 朗读");
+                    Toast.makeText(TranslationActivity.this, "朗读失败: " + error, Toast.LENGTH_SHORT).show();
+                });
+            }
+        });
     }
     
     @Override