Refine code

app/src/main/kotlin/cn/super12138/todo/views/progress/ProgressFragmentViewModel.kt

@@ -4,6 +4,7 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import cn.super12138.todo.logic.Repository
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 
 class ProgressFragmentViewModel : ViewModel() {
@@ -13,6 +14,7 @@ class ProgressFragmentViewModel : ViewModel() {
 
     fun updateProgress() {
         viewModelScope.launch {
+            delay(30)
             val total = Repository.getAll().size
             val complete = Repository.getAllComplete().size
 

app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoAdapter.kt

@@ -9,13 +9,10 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.ViewModelStoreOwner
 import androidx.recyclerview.widget.RecyclerView
 import cn.super12138.todo.R
-import cn.super12138.todo.logic.Repository
 import cn.super12138.todo.logic.dao.ToDoRoom
 import cn.super12138.todo.logic.model.ToDo
 import cn.super12138.todo.views.progress.ProgressFragmentViewModel
 import com.google.android.material.snackbar.Snackbar
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.launch
 
 class ToDoAdapter(private val todoList: MutableList<ToDo>, private val viewModelStoreOwner: ViewModelStoreOwner) :
     RecyclerView.Adapter<ToDoAdapter.ViewHolder>() {
@@ -28,21 +25,31 @@ class ToDoAdapter(private val todoList: MutableList<ToDo>, private val viewModel
     }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
+        val view = LayoutInflater.from(parent.context)
+            .inflate(R.layout.item_todo, parent, false)
+
+        return ViewHolder(view)
+    }
+
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        val todo = todoList[position]
+        holder.todoContext.text = todo.content
+        holder.todoSubject.text = todo.subject
+        /*if (!todo.isAnimated) {
+            holder.itemView.alpha = 0f
+            holder.itemView.animate().alpha(1f).duration = 200
+            todo.isAnimated = true
+        }*/
+
         val progressViewModel =
             ViewModelProvider(viewModelStoreOwner)[ProgressFragmentViewModel::class.java]
         val todoViewModel =
             ViewModelProvider(viewModelStoreOwner)[ToDoFragmentViewModel::class.java]
 
-        val view = LayoutInflater.from(parent.context)
-            .inflate(R.layout.item_todo, parent, false)
-        val holder = ViewHolder(view)
-
         holder.checkToDoBtn.setOnClickListener {
-            val position = holder.absoluteAdapterPosition
             if (position < 0 || position >= todoList.size) {
                 return@setOnClickListener
             }
-            val todo = todoList[position]
 
             todoList.removeAt(position)
             notifyItemRemoved(position)
@@ -60,18 +67,15 @@ class ToDoAdapter(private val todoList: MutableList<ToDo>, private val viewModel
         }
 
         holder.delToDoBtn.setOnClickListener {
-            val position = holder.absoluteAdapterPosition
             if (position < 0 || position >= todoList.size) {
                 return@setOnClickListener
             }
-            val todo = todoList[position]
 
             todoList.removeAt(position)
             notifyItemRemoved(position)
             notifyItemRangeChanged(position, todoList.size)
 
             todoViewModel.deleteTask(todo.uuid)
-            progressViewModel.updateProgress()
 
             // 设置空项目提示可见性
             if (todoList.isEmpty()) {
@@ -80,6 +84,7 @@ class ToDoAdapter(private val todoList: MutableList<ToDo>, private val viewModel
                 todoViewModel.emptyTipVis.value = View.GONE
             }
 
+            progressViewModel.updateProgress()
             Snackbar.make(it, R.string.task_deleted, Snackbar.LENGTH_LONG)
                 .setAction(R.string.delete_undo) {
                     if (todoList.size + 1 > 0) {
@@ -102,18 +107,6 @@ class ToDoAdapter(private val todoList: MutableList<ToDo>, private val viewModel
                 }
                 .show()
         }
-        return holder
-    }
-
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        val todo = todoList[position]
-        holder.todoContext.text = todo.content
-        holder.todoSubject.text = todo.subject
-        /*if (!todo.isAnimated) {
-            holder.itemView.alpha = 0f
-            holder.itemView.animate().alpha(1f).duration = 200
-            todo.isAnimated = true
-        }*/
     }
 
     override fun getItemCount() = todoList.size

app/src/main/kotlin/cn/super12138/todo/views/todo/ToDoFragment.kt

@@ -85,6 +85,7 @@ class ToDoFragment : Fragment() {
                     .setPositiveButton(R.string.ok, null)
                     .setNegativeButton(R.string.cancel, null)
                     .show()
+
                 dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
                     val todoContent = toDoDialogBinding.todoContent.editText?.text.toString()
                     if (todoContent.isEmpty()) {
@@ -100,7 +101,9 @@ class ToDoFragment : Fragment() {
                             }
                             dialog.dismiss()
                         } else {
+                            // 随机UUID
                             val randomUUID = UUID.randomUUID().toString()
+                            // 待办学科
                             val todoSubject = when (toDoDialogBinding.todoSubject.checkedChipId) {
                                 R.id.subject_chinese -> getString(R.string.subject_chinese)
                                 R.id.subject_math -> getString(R.string.subject_math)
@@ -124,6 +127,7 @@ class ToDoFragment : Fragment() {
                                 ToDo(randomUUID, 0, todoContent, todoSubject)
                             )
 
+                            // 插入数据库
                             lifecycleScope.launch {
                                 Repository.insert(
                                     ToDoRoom(
@@ -149,13 +153,17 @@ class ToDoFragment : Fragment() {
                     .setTitle(R.string.warning)
                     .setMessage(R.string.delete_confirm)
                     .setPositiveButton(R.string.ok) { _, _ ->
+                        // 清除 Recycler View
                         todoList.clear()
+                        // 清除数据库
                         lifecycleScope.launch {
                             Repository.deleteAll()
                             progressViewModel.updateProgress()
                         }
+                        // 通知数据更改
                         binding.todoList.adapter?.notifyItemRangeRemoved(0, todoList.size + 1)
 
+                        // 显示空项目提示
                         todoViewModel.emptyTipVis.value = View.VISIBLE
                     }
                     .setNegativeButton(R.string.cancel, null)
@@ -167,9 +175,11 @@ class ToDoFragment : Fragment() {
         binding.todoList.addOnScrollListener(object : RecyclerView.OnScrollListener() {
             val fab = binding.addItem
             override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+                // 列表下滑，隐藏FAB
                 if (dy > 0 && fab.isShown) {
                     fab.hide()
                 }
+                // 列表上滑，显示FAB
                 if (dy < 0 && !fab.isShown) {
                     fab.show()
                 }