Add empty check in content of the task

app/src/main/kotlin/cn/super12138/todo/logic/dao/ToDoRoom.kt

@@ -8,12 +8,12 @@ import androidx.room.PrimaryKey
  * @param uuid String 待办的uuid
  * @param state Int 待办的完成状态，0表示未完成，1表示完成
  * @param subject String 待办的学科
- * @param context String 待办的内容
+ * @param content String 待办的内容
  */
 @Entity(tableName = "todo")
 data class ToDoRoom(
     @PrimaryKey @ColumnInfo(name = "uuid") val uuid: String,
     @ColumnInfo(name = "state") val state: Int,
     @ColumnInfo(name = "subject") val subject: String,
-    @ColumnInfo(name = "context") val context: String
+    @ColumnInfo(name = "content") val content: String
 )

app/src/main/kotlin/cn/super12138/todo/logic/model/ToDo.kt

@@ -1,19 +1,3 @@
 package cn.super12138.todo.logic.model
 
-data class ToDo(val uuid: String, val context: String, val subject: String)
+data class ToDo(val uuid: String, val content: String, val subject: String)
-
-/*
-package cn.super12138.todo.logic.model
-
-import androidx.room.ColumnInfo
-import androidx.room.Entity
-import androidx.room.PrimaryKey
-
-@Entity(tableName = "todo")
-data class ToDo (
-    @PrimaryKey @ColumnInfo(name = "uuid") val uuid: String,
-    @ColumnInfo(name = "state") val state: Int,
-    @ColumnInfo(name = "subject") val subject: String,
-    @ColumnInfo(name = "context") val context: String
-)
- */

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

@@ -15,14 +15,13 @@ 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.coroutineScope
 import kotlinx.coroutines.launch
 
 class ToDoAdapter(val todoList: MutableList<ToDo>, val viewModelStoreOwner: ViewModelStoreOwner) :
     RecyclerView.Adapter<ToDoAdapter.ViewHolder>() {
 
     inner class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
-        val todoContext: TextView = view.findViewById(R.id.todo_context)
+        val todoContext: TextView = view.findViewById(R.id.todo_content)
         val todoSubject: TextView = view.findViewById(R.id.todo_subject)
         val checkToDoBtn: Button = view.findViewById(R.id.check_item_btn)
         val delToDoBtn: Button = view.findViewById(R.id.delete_item_btn)
@@ -92,7 +91,7 @@ class ToDoAdapter(val todoList: MutableList<ToDo>, val viewModelStoreOwner: View
                     if (todoList.size + 1 > 0) {
                         todoViewModel.emptyTipVis.value = View.GONE
                     }
-                    todoList.add(ToDo(todo.uuid, todo.context, todo.subject))
+                    todoList.add(ToDo(todo.uuid, todo.content, todo.subject))
 
                     todoViewModel.refreshData.value = 1
 
@@ -102,7 +101,7 @@ class ToDoAdapter(val todoList: MutableList<ToDo>, val viewModelStoreOwner: View
                                 todo.uuid,
                                 0,
                                 todo.subject,
-                                todo.context
+                                todo.content
                             )
                         )
                         progressViewModel.updateProgress()
@@ -115,7 +114,7 @@ class ToDoAdapter(val todoList: MutableList<ToDo>, val viewModelStoreOwner: View
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
         val todo = todoList[position]
-        holder.todoContext.text = todo.context
+        holder.todoContext.text = todo.content
         holder.todoSubject.text = todo.subject
     }
 

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

@@ -4,6 +4,7 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.appcompat.app.AlertDialog
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProvider
@@ -64,7 +65,7 @@ class ToDoFragment : Fragment() {
             val todos = Repository.getAllUncomplete()
             var count = 0
             for (todo in todos) {
-                todoList.add(ToDo(todo.uuid, todo.context, todo.subject))
+                todoList.add(ToDo(todo.uuid, todo.content, todo.subject))
                 count++
             }
             if (count == 0) {
@@ -82,12 +83,19 @@ class ToDoFragment : Fragment() {
             ToDoDialogBinding = DialogAddTodoBinding.inflate(layoutInflater)
 
             activity?.let { it1 ->
-                MaterialAlertDialogBuilder(it1)
+                val dialog = MaterialAlertDialogBuilder(it1)
                     .setTitle(R.string.add_task)
                     .setView(ToDoDialogBinding.root)
-                    .setPositiveButton(R.string.ok) { dialog, which ->
+                    .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()) {
+                        ToDoDialogBinding.todoContent.error =
+                            getString(R.string.content_cannot_be_empty)
+                    } else {
                         val randomUUID = UUID.randomUUID().toString()
-                        val todoContext = ToDoDialogBinding.todoContext.editText?.text.toString()
                         val todoSubject = when (ToDoDialogBinding.todoSubject.checkedChipId) {
                             R.id.subject_chinese -> "语文"
                             R.id.subject_math -> "数学"
@@ -107,7 +115,7 @@ class ToDoFragment : Fragment() {
 
                         // 添加到RecyclerView
                         todoList.add(
-                            ToDo(randomUUID, todoContext, todoSubject)
+                            ToDo(randomUUID, todoContent, todoSubject)
                         )
 
                         lifecycleScope.launch {
@@ -116,16 +124,16 @@ class ToDoFragment : Fragment() {
                                     randomUUID,
                                     0,
                                     todoSubject,
-                                    todoContext
+                                    todoContent
                                 )
                             )
                             progressViewModel.updateProgress()
                         }
 
                         binding.todoList.adapter?.notifyItemInserted(todoList.size + 1)
+                        dialog.dismiss()
                     }
-                    .setNegativeButton(R.string.cancel, null)
+                }
-                    .show()
             }
         }
 
@@ -179,4 +187,4 @@ class ToDoFragment : Fragment() {
             binding.todoList.adapter?.notifyItemInserted(todoList.size + 1)
         })
     }
-}
+}

app/src/main/res/layout/dialog_add_todo.xml

@@ -10,7 +10,7 @@
         android:orientation="vertical">
 
         <com.google.android.material.textfield.TextInputLayout
-            android:id="@+id/todo_context"
+            android:id="@+id/todo_content"
             style="?attr/textInputFilledExposedDropdownMenuStyle"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"

app/src/main/res/layout/todo_item.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.google.android.material.card.MaterialCardView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    style="?attr/materialCardViewElevatedStyle"
     android:layout_width="match_parent"
     android:layout_height="80dp"
     android:layout_marginLeft="10dp"
@@ -21,7 +22,7 @@
             android:orientation="vertical">
 
             <TextView
-                android:id="@+id/todo_context"
+                android:id="@+id/todo_content"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginStart="15dp"

app/src/main/res/values-zh-rCN/strings.xml

@@ -33,6 +33,7 @@
     <string name="no_tasks">无待办事项</string>
     <string name="delete_undo">撤销</string>
     <string name="task_deleted">该待办已删除</string>
+    <string name="content_cannot_be_empty">待办内容不能为空</string>
     <string name="settings_label">设置</string>
     <string name="appearance">外观</string>
     <string name="dark_mode">深色模式</string>

app/src/main/res/values/strings.xml

@@ -33,6 +33,7 @@
     <string name="no_tasks">No tasks</string>
     <string name="delete_undo">Undo</string>
     <string name="task_deleted">This task has been deleted</string>
+    <string name="content_cannot_be_empty">Task content cannot be empty</string>
     <!--Settings-->
     <string name="settings_label">Settings</string>
     <string name="appearance">Appearance</string>