添加夜间模式主题设置功能：跟随系统/浅色/深色模式

app/src/main/java/com/example/flomo_ai/SecondActivity.kt

@@ -17,8 +17,11 @@ import android.widget.ImageView
 import android.widget.LinearLayout
 import android.widget.TextView
 import android.widget.Toast
+import android.widget.RadioGroup
+import android.widget.RadioButton
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
+import com.example.flomo_ai.ui.theme.ThemeManager
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
 import kotlinx.coroutines.CoroutineScope
@@ -57,6 +60,12 @@ class SecondActivity : AppCompatActivity() {
     private lateinit var layoutPromptContent: LinearLayout
     private lateinit var ivPromptArrow: ImageView
     private lateinit var layoutPromptToggle: LinearLayout
+    
+    // Theme view references
+    private lateinit var rgThemeMode: RadioGroup
+    private lateinit var rbThemeFollowSystem: RadioButton
+    private lateinit var rbThemeLight: RadioButton
+    private lateinit var rbThemeDark: RadioButton
 
     // Data storage
     private var headerConfigs = mutableListOf<HeaderConfig>()
@@ -68,6 +77,7 @@ class SecondActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        ThemeManager.applySavedTheme(this)
         Log.d("SecondActivity", "onCreate: Starting SecondActivity")
         try {
             setContentView(R.layout.activity_second)
@@ -148,6 +158,12 @@ class SecondActivity : AppCompatActivity() {
             ivPromptArrow = findViewById(R.id.ivPromptArrow)
             layoutPromptToggle = findViewById(R.id.layoutPromptToggle)
             
+            // Theme Section
+            rgThemeMode = findViewById(R.id.rgThemeMode)
+            rbThemeFollowSystem = findViewById(R.id.rbThemeFollowSystem)
+            rbThemeLight = findViewById(R.id.rbThemeLight)
+            rbThemeDark = findViewById(R.id.rbThemeDark)
+            
             Log.d("SecondActivity", "initViews: All views found")
 
             // Setup API key toggle
@@ -283,6 +299,39 @@ class SecondActivity : AppCompatActivity() {
                 addPromptEntry(prompt.title, prompt.content)
             }
         }
+        
+        // Setup theme
+        setupTheme()
+    }
+
+    private fun setupTheme() {
+        // Get saved theme mode
+        val themeMode = ThemeManager.getThemeMode(this)
+        
+        // Set the correct radio button
+        when (themeMode) {
+            ThemeManager.THEME_FOLLOW_SYSTEM -> rbThemeFollowSystem.isChecked = true
+            ThemeManager.THEME_LIGHT -> rbThemeLight.isChecked = true
+            ThemeManager.THEME_DARK -> rbThemeDark.isChecked = true
+            else -> rbThemeFollowSystem.isChecked = true
+        }
+        
+        // Set up radio group listener
+        rgThemeMode.setOnCheckedChangeListener { _, checkedId ->
+            val newMode = when (checkedId) {
+                R.id.rbThemeFollowSystem -> ThemeManager.THEME_FOLLOW_SYSTEM
+                R.id.rbThemeLight -> ThemeManager.THEME_LIGHT
+                R.id.rbThemeDark -> ThemeManager.THEME_DARK
+                else -> ThemeManager.THEME_FOLLOW_SYSTEM
+            }
+            
+            // Save and apply the new theme
+            ThemeManager.setThemeMode(this, newMode)
+            Log.d("SecondActivity", "Theme mode changed to: ${ThemeManager.getThemeModeName(newMode)}")
+            
+            // Recreate activity to apply theme changes
+            recreate()
+        }
     }
 
     private fun addHeaderEntry(key: String = "", value: String = "") {