关键词：
package com.example.bboyryu.todo;
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.SQLException;
import android.util.Log;
public class ToDoModel
DbOpenHelper helper = null;
SQLiteDatabase db = null;
private final static String DATABASE_NAME = "todo";
private final static String TODO_TABLE_NAME = "mst_todo";
/*
* Constract
* */
public ToDoModel(Context context)
if(helper == null || db == null)
helper = new DbOpenHelper(context);
db = helper.getWritableDatabase();
/*
private String getTodo()
String sql = "SELECT * FROM " + TODO_TABLE_NAME;
try
db.execSQL(sql);
catch (SQLException e)
Log.e("ERROR", e.toString());
*/
/*
* Insert data
*
* Parameter
* @ String title
* */
public void insertToDoData(String title)
String sql = "INSERT INTO " + TODO_TABLE_NAME + " (title, created_at, update_at, delflg) values(?,CURTIME(),CURTIME(),0);";
String[] bindStr = new String[]
title
;
try
db.execSQL(sql, bindStr);
catch (SQLException e)
Log.e("ERROR", e.toString());
/*
* Update Task
*
* Parameter
* @ int id
* @ String title
* @ int delflg
* */
/*
public void updateToDoData(String id ,String title)
// Update
String sql = "UPDATE " + TODO_TABLE_NAME
+ " SET title =?, update_at = CURTIME() "
+ "WHERE id = ? ;";
String[] bindStr = new String[]
title,
id,
;
try
db.execSQL(sql,bindStr);
catch (SQLException e)
Log.e("ERROR", e.toString());
*/
/*
* Logically delete
*
* Parameter
* @ int id
* @ String title
* @ int delflg
* */
/*
public void updateToDoStatus(String id , String delflg)
// Logically delete
String sql = "UPDATE " + TODO_TABLE_NAME
+ " SET update_at = CURTIME(),delflg = ?, "
+ "WHERE id = ? ;";
String[] bindStr = new String[]
delflg,
id,
;
try
db.execSQL(sql,bindStr);
catch (SQLException e)
Log.e("ERROR", e.toString());
*/
/*
* Logically delete
*
* Parameter
* @int id
* */
/*
public void deleteToDoData(String id)
String sql = "DELETE FROM " + TODO_TABLE_NAME
+ " WHERE id = ?;";
String[] bindStr = new String[]
id
;
try
db.execSQL(sql,bindStr);
catch (SQLException e)
//Log.e("ERROR", e.toString());
*/
/*
* Close to database
*
*/
/*
public void closeDataBase()
db.close();
db = null;
*/
/*
* Input validation
* */
public boolean validateData(String title)
if(title == null && title.isEmpty())
return false;
return true;
package com.example.bboyryu.todo;
import android.support.v7.app.AppCompatActivity;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
public class MainActivity extends AppCompatActivity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//setContentView(R.layout.sub);
//データベースヘルパーのインスタンスを作成する（まだデータベースはできない）
DbOpenHelper dbHelper = new DbOpenHelper(this);
//データベースオブジェクトを取得する（データベースにアクセスすると作成される。）
SQLiteDatabase db = dbHelper.getWritableDatabase();
//ToDoModel model = new ToDoModel(this);
//model.insertToDoData( "aaa");
//データベースを閉じる
//db.close();
import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DbOpenHelper extends SQLiteOpenHelper
private static final String TAG = "DbOpenHelper";
private static final String DATABASE_NAME = "todo";
private static final String TODO_TABLE_NAME = "mst_todo";
private static final int DATABASE_VERSION = 1;
public DbOpenHelper(Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
@Override
public void onCreate(SQLiteDatabase db)
createToDoTable(db);
/*
* Update ToDo Table
* This method execute when application was upgraded
* Change the database configuration
* */
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
db.execSQL("DROP TABLE IF EXISTS " + TODO_TABLE_NAME + ";");
onCreate(db);
/*
* Initialize process create ToDo Table
* */
private void createToDoTable(SQLiteDatabase db)
String sql = "CREATE TABLE mst_todo ( "
+ " id int(11) NOT NULL COMMENT'Tasku ID' AUTO_INCREMENT, "
+ "Title text NOT NULL COMMENT'Title', "
+ "created_at timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT'Create Time', "
+ "update_at timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' COMMENT'Update Time', "
+ "delflg tinyint(3) NOT NULL DEFAULT 0 COMMENT'Delete Flag', "
+ "PRIMARY KEY (id); ";
db.execSQL(sql);
package com.example.bboyryu.myapplication;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseHelper extends SQLiteOpenHelper
/* データベース名 */
private final static String DB_NAME = "todo.db";
/* データベースのバージョン */
private final static int DB_VER = 1;
/*
private final static String TAG = "DbOpenHelper";
private final static String DATABASE_NAME = "todo";
private final static String TODO_TABLE_NAME = "mst_todo";
private final static int DATABASE_VERSION = 1;
*/
/*
* コンストラクタ
*/
public DatabaseHelper(Context context)
super(context, DATABASE_NAME, null, DATABASE_VERSION);
/*
* Initialize process create ToDo Table
* */
@Override
public void onCreate(SQLiteDatabase db)
String sql = "";
sql += "create table MyTable (";
sql += " id integer primary key autoincrement";
sql += ",title text not null";
sql += ",created_at numeric";
sql += ",update_at numeric";
sql += ",delflg integer";
sql += ")";
db.execSQL(sql);
/*
* Update ToDo Table
* This method execute when application was upgraded
* Change the database configuration
* */
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
db.execSQL("DROP TABLE IF EXISTS " + TODO_TABLE_NAME + ";");
onCreate(db);