style: Maintain architectural boundaries

app/src/main/java/com/lsp/view/activity/main/MainActivity.kt

@@ -30,9 +30,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var search: EditText
     private var shortAnnotationDuration: Int = 0
     private var username: String? = ""
-    private var nowSourceName: String? = null
     val TAG = javaClass.simpleName
-    private var safeMode: Boolean = true //安全模式
     private lateinit var viewModel: MainViewModel
 
 
@@ -60,8 +58,7 @@ class MainActivity : AppCompatActivity() {
 
         search.setOnEditorActionListener { content, actionId, _ ->
             if (actionId == EditorInfo.IME_ACTION_SEARCH) {
-                viewModel.uiState.value.nowSearchText.value = content.text.toString()
-                viewModel.fetchPostByRefresh()
+                viewModel.fetchPostBySearch(content.text.toString())
             }
             return@setOnEditorActionListener false
         }
@@ -150,18 +147,18 @@ class MainActivity : AppCompatActivity() {
 
         //加载源改变
         val configSp = getSharedPreferences("com.lsp.view_preferences", 0)
-        if (nowSourceName != configSp.getString("source_name",null)){
-            viewModel.fetchPostByRefresh()
-            nowSourceName = configSp.getString("source_name",null)
+
+        val nowSourceName = configSp.getString("source_name", null)
+
+        if (nowSourceName != null && viewModel.uiState.value.nowSourceName.value != nowSourceName){
+            viewModel.updateNowSource(nowSourceName)
         }
 
-        if (safeMode != configSp.getBoolean("safe_mode",true)){
-            viewModel.fetchPostByRefresh()
-            safeMode = configSp.getBoolean("safe_mode",true)
+        val nowMode = configSp.getBoolean("safe_mode", true)
+        if (viewModel.uiState.value.isSafe != nowMode){
+            viewModel.updateSafeMode(nowMode)
         }
 
-//        search.setText("")
-
     }
 
     //隐藏搜索栏

app/src/main/java/com/lsp/view/model/MainViewModel.kt

@@ -22,7 +22,8 @@ import kotlinx.coroutines.launch
 
 class MainViewModel(private val repository: PostRepository,context: Context):ViewModel() {
     private val _uiState = MutableStateFlow(UiState())
-    val uiState:StateFlow<UiState> = _uiState.asStateFlow()
+    val uiState:StateFlow<UiState>
+        get() =  _uiState.asStateFlow()
     private var fetchJob: Job? = null
     val adapter = PostAdapter(context)
     private val TAG = this::class.java.simpleName
@@ -62,7 +63,9 @@ class MainViewModel(private val repository: PostRepository,context: Context):Vie
         }
 
         _uiState.update {
-            it.copy(nowSourceName = configSp.getString("source_name",null))
+            it.apply {
+                it.nowSourceName.postValue(configSp.getString("source_name",null))
+            }
         }
 
     }
@@ -109,6 +112,16 @@ class MainViewModel(private val repository: PostRepository,context: Context):Vie
         fetchNewPost()
     }
 
+    fun fetchPostBySearch(searchTarget:String){
+        _uiState.update {
+            it.apply {
+                it.nowSearchText.postValue(searchTarget)
+            }
+        }
+
+        fetchNewPost()
+    }
+
     fun appendPost(){
 
         _uiState.update {
@@ -123,4 +136,15 @@ class MainViewModel(private val repository: PostRepository,context: Context):Vie
 
     }
 
+    fun updateSafeMode(mode:Boolean){
+        _uiState.update {
+            it.copy(isSafe = mode)
+        }
+        fetchNewPost()
+    }
+
+    fun updateNowSource(source:String){
+        _uiState.value.nowSourceName.postValue(source)
+        fetchPostByRefresh()
+    }
 }

app/src/main/java/com/lsp/view/model/UiState.kt

@@ -6,7 +6,7 @@ data class UiState(
     var showSearchBar:Boolean = false,
     val isRefreshing:MutableLiveData<Boolean> = MutableLiveData(),
     var nowSearchText:MutableLiveData<String> = MutableLiveData(""),
-    val nowSourceName: String? = null,
+    val nowSourceName: MutableLiveData<String> = MutableLiveData(),
     val isSafe: Boolean = true, //安全模式
     val nowPage:Int = 1,
     val isAppend:Boolean = false