【发布时间】：2019-04-14 15:26:38
【问题描述】：
我正在使用 SQLite 来存储我的信息。 我将日期存储为字符串格式。现在我想根据日期获取数据，单个日期可能有多个数据。我已经检查了相关问题并尝试了我的方式，但找不到解决方案。虽然我能够获取特定日期的单个数据的信息。
我从数据库中获取数据的代码：
public ArrayList<ExpenseModel> getSingleExpenseDetails(String date){
SQLiteDatabase sqLiteDatabase=this.getReadableDatabase();
String query = "select * from " + TABLE_SAVE_EXPENSE + " where "+ COLUMN_EXPENSE_DATE+ " = '" + date+ "'";
Cursor cursor=sqLiteDatabase.rawQuery(query, null);
ExpenseModel expenseModel=new ExpenseModel();
ArrayList<ExpenseModel> expenseModels = new ArrayList<>();
Log.v("Title : ",""+title);
if (cursor.moveToFirst()){
do {
expenseModel.setTitle(cursor.getString(cursor.getColumnIndex(COLUMN_EXPENSE_TITLE)));
expenseModel.setDescription(cursor.getString(cursor.getColumnIndex(COLUMN_EXPENSE_DESCRIPTION)));
expenseModel.setAmount(cursor.getInt(cursor.getColumnIndex(COLUMN_EXPENSE_AMOUNT)));
expenseModel.setDate(cursor.getString(cursor.getColumnIndex(COLUMN_EXPENSE_DATE)));
expenseModel.setCurrency(cursor.getString(cursor.getColumnIndex(COLUMN_EXPENSE_CURRENCY)));
Log.v("Info : ",""+cursor.getString(cursor.getColumnIndex(COLUMN_EXPENSE_TITLE)));
expenseModels.add(expenseModel)
}while (cursor.moveToNext());
}
cursor.close();
sqLiteDatabase.close();
return expenseModels;
}
ExpenseModel 类：
package app.shakil.com.dailyexpense.Models;
public class ExpenseModel {
private int id;
private String title;
private String description;
private String date;
private int amount;
private String currency;
public ExpenseModel(){
}
public ExpenseModel(String title,String description,String date,int amount,String currency){
this.title=title;
this.description=description;
this.date=date;
this.amount=amount;
this.currency=currency;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
public String getCurrency() {
return currency;
}
public void setCurrency(String currency) {
this.currency = currency;
}
}
【问题讨论】：
-
如果
date是COLUMN_EXPENSE_DATE列的格式，您的代码应该可以工作。 -
格式一样，但是一个日期有多个数据时会出现问题。
-
什么问题？您将获得该日期的所有行。
-
找不到指定日期的所有数据，返回一个空的ExpenseModel。
-
那么你没有传递正确的日期值或格式。
标签： java android sqlite date android-sqlite