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Java代碼?

package?com.shawn.test;??

import?android.content.ContentValues;??

import?android.content.Context;??

import?android.database.Cursor;??

import?android.database.sqlite.SQLiteDatabase;??

import?android.database.sqlite.SQLiteOpenHelper;??

import?android.util.Log;??

publicclass?DatabaseAdapter{??

privatestaticfinal?String?DB_NAME?=?"Test.db";????//數據庫名

privatestaticfinalint????DB_VERSION?=?1;?????????//數據庫版本

privatestaticfinal?String?DB_TABLE?=?"my_order";??//表名

privatestaticfinal?String?KEY_ID?=?"_id";?????????//id

privatestaticfinal?String?KEY_ORDER_ID?=?"order_id";??//訂單號

privatestaticfinal?String?KEY_TYPE?=?"_type";?????????//訂單類型

privatestaticfinal?String?KEY_STATE?=?"_state";???????//訂單狀態

private?Context?context;??

private?DatabaseHelper?mDatabaseHelper;??

private?SQLiteDatabase?mSQLiteDatabase;??

privatestaticclass?DatabaseHelper?extends?SQLiteOpenHelper{??

//創建數據庫語句

privatestaticfinal?String?DB_CREAT?=?"CREATE?TABLE?"

????????????????+?DB_TABLE??

????????????????+?"?("?+?KEY_ID?+?"?INTEGER?PRIMARY?KEY,"

????????????????+?KEY_ORDER_ID?+?"?TEXT,"

????????????????+?KEY_TYPE?+?"?INTEGER,"

????????????????+?KEY_STATE?+?"?INTEGER)";??

public?DatabaseHelper(Context?context)?{??

super(context,?DB_NAME,??null?,?DB_VERSION);??

????????}??

@Override

publicvoid?onCreate(SQLiteDatabase?db)?{??

//?TODO?Auto-generated?method?stub

????????????db.execSQL(DB_CREAT);??

????????}??

@Override

publicvoid?onUpgrade(SQLiteDatabase?db,?int?oldVersion,?int?newVersion)?{??

//?TODO?Auto-generated?method?stub

????????????db.execSQL("DROP?TABLE?IF?EXISTS?"+DB_TABLE);??

????????????onCreate(db);??

????????}??

????}??

public?DatabaseAdapter(Context?context)?{??

this.context?=?context;??

????}??

//開啟

publicvoid?open()?{??

????????mDatabaseHelper?=?new?DatabaseHelper(context);????

????????mSQLiteDatabase?=?mDatabaseHelper.getWritableDatabase();??

????}??

//關閉

publicvoid?close()?{???

????????mSQLiteDatabase.close();??

????????mDatabaseHelper.close();??

????}??

//增

publiclong?insertData(String?orderId,?int?type)?{????

????????ContentValues?values?=?new??ContentValues();?????

????????values.put(KEY_ORDER_ID,?orderId);???

????????values.put(KEY_TYPE,?type);??

????????values.put(KEY_STATE,?Config.STATE_APPLY);???

long?id?=?mSQLiteDatabase.insert(DB_TABLE,?KEY_ID,?values);???

return?id;??

????}??

//刪

publicboolean?deleteData(Context?context,?long?id)?{??

boolean?delete?=?mSQLiteDatabase.delete(DB_TABLE,?KEY_ID?+?"="?+id,?null)>0;??

return?delete;??

????}??

//改

publicboolean?updateData(long?id,?int?state)?{??

????????ContentValues?values?=?new??ContentValues();????

????????values.put(KEY_STATE,?""+state);???

boolean?update?=?mSQLiteDatabase.update(DB_TABLE,?values,?KEY_ID?+?"="?+id,?null)>0;??

return?update;??

????}??

//查

public?Cursor?fetchData(String?selection)?{??

????????Cursor?mCursor?=?mSQLiteDatabase.query(DB_TABLE,?new?String[]{KEY_ID,?KEY_ORDER_ID,?KEY_TYPE,?KEY_STATE},?selection,?null,?null,?null,?null);??

if(mCursor?!=?null)??

????????????mCursor.moveToFirst();??

return?mCursor;??

????}??

} ?

轉載于:https://my.oschina.net/sarashare/blog/637369

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