我找不到在其中创建数据库适配器的数据库文件和表。但我可以看到数据正在保存,但我无法在我的目录中找到我的 db 文件。但我可以保存条目并在我的屏幕上查看。这是我正在创建数据库的 DBAdapter 类。public class DBAdapter { private static final String DB_NAME = "clientList.db"; private static final int DB_VERSION = 1; private static final String TABLE_CLIENT = "CLIENT"; private static final String COLUMN_CLIENT_ID = "CLIENT_ID"; private static final String COLUMN_CLIENT_NAME = "CLIENT_NAME"; private static final String query = "create table test_1 " + " (COLUMN_CLIENT_ID integer primary key, COLUMN_CLIENT_NAME text)"; private Context context; private SQLiteDatabase sqliteDatabase; private static DBAdapater dbAdapaterInstance; private DBAdapater(Context context){ this.context = context; sqliteDatabase = new DatabaseHelper(this.context,DB_NAME,null,DB_VERSION).getWritableDatabase(); } public static DBAdapater getDbAdapaterInstance(Context context){ if(dbAdapaterInstance == null){ dbAdapaterInstance = new DBAdapater(context); } return dbAdapaterInstance; } public boolean insert(int clientId , String name ){ ContentValues contentValues = new ContentValues(); contentValues.put(COLUMN_CLIENT_ID,clientId); contentValues.put(COLUMN_CLIENT_NAME,name); return sqliteDatabase.insert(TABLE_CLIENT,null,contentValues)>0; } public boolean delete(int ClientID){ return sqliteDatabase.delete(TABLE_CLIENT, COLUMN_CLIENT_ID + "=" + ClientID,null)>0; } public boolean modify(int ClientID , String newClient){ ContentValues contentValues = new ContentValues(); contentValues.put(COLUMN_CLIENT_NAME,newClient); return sqliteDatabase.update(TABLE_CLIENT,contentValues,COLUMN_CLIENT_ID + "=" + ClientID,null)>0; }
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