示例代码：安卓版每日待办事项
很抱歉，我是一名自然语言处理模型，无法提供完整的Android应用程序代码。但是，我可以提供一些基本的代码示例，帮助您开始编写您的应用程序。
首先，您需要在您的Android项目中添加SQLite依赖项。在您的build.gradle文件中添加以下代码：
```
dependencies {
implementation 'androidx.sqlite:sqlite:2.1.0'
}
```
接下来，您需要创建一个待办事项的数据模型。您可以创建一个TodoItem类，其中包含待办事项的名称、类型和完成状态。以下是一个示例TodoItem类：
```
data class TodoItem(
val id: Int,
val name: String,
val type: TodoType,
var isCompleted: Boolean
)
enum class TodoType {
DAILY,
WEEKLY,
MONTHLY,
QUARTERLY,
TEMPORARY
}
```
接下来，您需要创建一个SQLite数据库帮助程序类，用于创建和管理待办事项数据库。以下是一个示例TodoDatabaseHelper类：
```
class TodoDatabaseHelper(context: Context) : SQLiteOpenHelper(context, DATABASE_NAME, null, DATABASE_VERSION) {
companion object {
private const val DATABASE_VERSION = 1
private const val DATABASE_NAME = "todo.db"
private const val TABLE_NAME = "todo_items"
private const val COLUMN_ID = "id"
private const val COLUMN_NAME = "name"
private const val COLUMN_TYPE = "type"
private const val COLUMN_COMPLETED = "completed"
}
override fun onCreate(db: SQLiteDatabase) {
val createTable = "CREATE TABLE $TABLE_NAME ($COLUMN_ID INTEGER PRIMARY KEY AUTOINCREMENT, $COLUMN_NAME TEXT, $COLUMN_TYPE TEXT, $COLUMN_COMPLETED INTEGER)"
db.execSQL(createTable)
}
override fun onUpgrade(db: SQLiteDatabase, oldVersion: Int, newVersion: Int) {
db.execSQL("DROP TABLE IF EXISTS $TABLE_NAME")
onCreate(db)
}
fun addTodoItem(todoItem: TodoItem) {
val db = this.writableDatabase
val values = ContentValues().apply {
put(COLUMN_NAME, todoItem.name)
put(COLUMN_TYPE, todoItem.type.name)
put(COLUMN_COMPLETED, if (todoItem.isCompleted) 1 else 0)
}
db.insert(TABLE_NAME, null, values)
db.close()
}
fun getTodoItems(type: TodoType): List
val todoItems = mutableListOf
val selectQuery = "SELECT * FROM $TABLE_NAME WHERE $COLUMN_TYPE = '${type.name}'"
val db = this.readableDatabase
val cursor = db.rawQuery(selectQuery, null)
if (cursor.moveToFirst()) {
do {
val id = cursor.getInt(cursor.getColumnIndex(COLUMN_ID))
val name = cursor.getString(cursor.getColumnIndex(COLUMN_NAME))
val isCompleted = cursor.getInt(cursor.getColumnIndex(COLUMN_COMPLETED)) == 1
todoItems.add(TodoItem(id, name, type, isCompleted))
} while (cursor.moveToNext())
}
cursor.close()
db.close()
return todoItems
}
fun updateTodoItem(todoItem: TodoItem) {
val db = this.writableDatabase
val values = ContentValues().apply {
put(COLUMN_NAME, todoItem.name)
put(COLUMN_TYPE, todoItem.type.name)
put(COLUMN_COMPLETED, if (todoItem.isCompleted) 1 else 0)
}
db.update(TABLE_NAME, values, "$COLUMN_ID = ?", arrayOf(todoItem.id.toString()))
db.close()
}
fun deleteTodoItem(todoItem: TodoItem) {
val db = this.writableDatabase
db.delete(TABLE_NAME, "$COLUMN_ID = ?", arrayOf(todoItem.id.toString()))
db.close()
}
}
```
现在，您可以在您的应用程序中使用TodoDatabaseHelper类来添加、获取、更新和删除待办事项。例如，以下代码将添加一个每日待办事项：
```
val todoItem = TodoItem(0, "每日待办事项", TodoType.DAILY, false)
val dbHelper = TodoDatabaseHelper(this)
dbHelper.addTodoItem(todoItem)
```
最后，您需要创建一个用户界面，以显示待办事项列表和复选框。您可以使用RecyclerView和CheckBox来实现这一点。以下是一个示例布局文件：
```
android:layout_width="match_parent"
android:layout_height="match_parent" />
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="添加待办事项" />
```
您可以在您的活动中使用RecyclerView和CheckBox来显示待办事项列表。以下是一个示例活动代码：
```
class MainActivity : AppCompatActivity() {
private lateinit var todoList: RecyclerView
private lateinit var addButton: Button
private lateinit var dbHelper: TodoDatabaseHelper
private lateinit var todoItems: MutableList
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
todoList = findViewById(R.id.todo_list)
addButton = findViewById(R.id.add_button)
dbHelper = TodoDatabaseHelper(this)
todoItems = dbHelper.getTodoItems(TodoType.DAILY).toMutableList()
val adapter = TodoListAdapter(todoItems)
todoList.adapter = adapter
todoList.layoutManager = LinearLayoutManager(this)
addButton.setOnClickListener {
val todoItem = TodoItem(0, "新的待办事项", TodoType.DAILY, false)
dbHelper.addTodoItem(todoItem)
todoItems.add(todoItem)
adapter.notifyItemInserted(todoItems.size - 1)
}
}
inner class TodoListAdapter(private val todoItems: List
inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
val name: TextView = itemView.findViewById(R.id.name)
val checkbox: CheckBox = itemView.findViewById(R.id.checkbox)
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
val itemView = LayoutInflater.from(parent.context).inflate(R.layout.todo_item, parent, false)
return ViewHolder(itemView)
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
val todoItem = todoItems[position]
holder.name.text = todoItem.name
holder.checkbox.isChecked = todoItem.isCompleted
holder.checkbox.setOnCheckedChangeListener { _, isChecked ->
todoItem.isCompleted = isChecked
dbHelper.updateTodoItem(todoItem)
}
}
override fun getItemCount(): Int {
return todoItems.size
}
}
}
```
这是一个非常基本的示例，您可以根据您的需求进行修改和扩展。希望这可以帮助您开始编写您的每日待办事项应用程序！