在android项目上创建数据库

我正在开发android studio上的项目，我们需要创建一个数据库。我了解数据库如何工作，但我无法理解如何创建它。在我的项目中，我得到了创建数据库表的DataBaseHandler类。在android项目上创建数据库

public class DatabaseHandler extends SQLiteOpenHelper { 

//DataBase name 
public static final String TABLE_PERSON = "person"; 
public static final String TABLE_SCORE = "score"; 
public static final String TABLE_ALBUM = "album"; 
public static final String TABLE_FRIENDSHIP = "friendship"; 
public static final String TABLE_RENDEZVOUS = "rendezvous"; 
public static final String TABLE_AVAILABILITY = "availability"; 

//Key name 
//Key Person Name 
public static final String PERSON_FIRST_NAME = "firstName"; 
public static final String PERSON_NAME = "name"; 
public static final String PERSON_LOGIN = "login"; 
public static final String PERSON_PLACE = "place"; 
public static final String PERSON_BIRTHDAY = "birthday"; 
public static final String PERSON_LANGUAGE = "language"; 
public static final String PERSON_HAIR = "hair"; 
public static final String PERSON_EYES = "eyes"; 
public static final String PERSON_PASSWORD = "password"; 
public static final String PERSON_DESCRIPTION = "description"; 
public static final String PERSON_GENDER = "gender"; 
public static final String PERSON_ORIENTATION = "orientation"; 
//Key Score Name 
public static final String SCORE_LOGINGET = "loginGet"; 
public static final String SCORE_LOGINGIVE = "loginGive"; 
public static final String SCORE_QUOTATION = "quotation"; 
//Key Album Name 
public static final String ALBUM_LOGIN = "login"; 
public static final String ALBUM_PICTURE = "picture"; 
//Key Friendship Name 
public static final String FRIENDSHIP_LOGIN1 = "login1"; 
public static final String FRIENDSHIP_LOGIN2 = "login2"; 
public static final String FRIENDSHIP_CHAT = "chat"; 
//Key RendezVous Name 
public static final String RENDEZVOUS_LOGIN1 = "login1"; 
public static final String RENDEZVOUS_LOGIN2 = "login2"; 
public static final String RENDEZVOUS_MEETING = "meeting"; 
//Key Availability Name 
public static final String AVAILABILITY_LOGIN = "login"; 
public static final String AVAILABILITY_DATE = "date"; 

//Drop Table 
public static final String PERSON_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_PERSON + ";"; 
public static final String SCORE_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_SCORE + ";"; 
public static final String ALBUM_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_ALBUM + ";"; 
public static final String FRIENDSHIP_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_FRIENDSHIP + ";"; 
public static final String RENDEZVOUS_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_RENDEZVOUS + ";"; 
public static final String AVAILABILITY_TABLE_DROP = "DROP TABLE IF EXISTS " + TABLE_AVAILABILITY + ";"; 

//Create Table 
//Person 
public static final String PERSON_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_PERSON + " (" + 
       PERSON_LOGIN + " TEXT PRIMARY KEY, " + 
       PERSON_PLACE + " TEXT not nul, " + 
       PERSON_FIRST_NAME + " TEXT not null, " + 
       PERSON_NAME + " TEXT not null, " + 
       PERSON_BIRTHDAY + " TEXT not null, " + 
       PERSON_LANGUAGE + " TEXT not null, " + 
       PERSON_HAIR + " TEXT not null, " + 
       PERSON_EYES + " TEXT not null, " + 
       PERSON_PASSWORD + " TEXT not null, " + 
       PERSON_DESCRIPTION + " TEXT not null, " + 
       PERSON_GENDER + " TEXT not null, " + 
       PERSON_ORIENTATION + " TEXT not null);"; 
//Score 
public static final String SCORE_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_SCORE + " (" + 
       SCORE_LOGINGIVE + " TEXT not null references " + TABLE_PERSON + ", " + 
       SCORE_LOGINGET + " TEXT not null references " + TABLE_PERSON + ", " + 
       SCORE_QUOTATION + " INTEGER not null, PRIMARY KEY (" + 
       SCORE_LOGINGIVE + ", " + SCORE_LOGINGET + "));"; 
//Album 
public static final String ALBUM_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_ALBUM + " (" + 
       ALBUM_LOGIN + " TEXT not null references " + TABLE_PERSON + ", " + 
       ALBUM_PICTURE + " TEXT not null, PRIMARY KEY(" + 
       ALBUM_LOGIN + ", " + ALBUM_PICTURE + "));"; 
//Friendship 
public static final String FRIENDSHIP_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_FRIENDSHIP + " (" + 
       FRIENDSHIP_LOGIN1 + " TEXT not null references " + TABLE_PERSON + ", " + 
       FRIENDSHIP_LOGIN2 + " TEXT not null references " + TABLE_PERSON + ", " + 
       FRIENDSHIP_CHAT + " TEXT, PRIMARY KEY (" + 
       FRIENDSHIP_LOGIN1 + ", " + FRIENDSHIP_LOGIN2 + "));"; 
//Rendezvous 
public static final String RENDEZVOUS_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_RENDEZVOUS + " (" + 
       RENDEZVOUS_LOGIN1 + " TEXT not null references" + TABLE_PERSON + ", " + 
       RENDEZVOUS_LOGIN2 + " TEXT not null references" + TABLE_PERSON + ", " + 
       RENDEZVOUS_MEETING + " TEXT not null, PRIMARY KEY" + 
       RENDEZVOUS_LOGIN1 + ", " + RENDEZVOUS_LOGIN2 + "), FOREIGN KEY(" + 
       RENDEZVOUS_LOGIN1 + ", " + RENDEZVOUS_MEETING + ") references " + TABLE_AVAILABILITY + ", FOREIGN KEY(" + 
       RENDEZVOUS_LOGIN2 + ", " + RENDEZVOUS_MEETING + ") references " + TABLE_AVAILABILITY + ");"; 
//Availability 
public static final String AVAILABILITY_TABLE_CREATE = 
     "CREATE TABLE " + TABLE_AVAILABILITY + " (" + 
       AVAILABILITY_LOGIN + " TEXT not null references" + TABLE_PERSON + ", " + 
       AVAILABILITY_DATE + " TEXT not null, PRIMARY KEY (" + 
       AVAILABILITY_LOGIN + ", " + AVAILABILITY_DATE + "));"; 

public DatabaseHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) { 
    super(context, name, factory, version); 
} 

@Override 
public void onCreate(SQLiteDatabase db) { 
    db.execSQL(PERSON_TABLE_CREATE); 
    db.execSQL(SCORE_TABLE_CREATE); 
    db.execSQL(ALBUM_TABLE_CREATE); 
    db.execSQL(FRIENDSHIP_TABLE_CREATE); 
    db.execSQL(RENDEZVOUS_TABLE_CREATE); 
    db.execSQL(AVAILABILITY_TABLE_CREATE); 
} 

@Override 
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL(PERSON_TABLE_DROP); 
    db.execSQL(SCORE_TABLE_DROP); 
    db.execSQL(ALBUM_TABLE_DROP); 
    db.execSQL(FRIENDSHIP_TABLE_DROP); 
    db.execSQL(RENDEZVOUS_TABLE_DROP); 
    db.execSQL(AVAILABILITY_TABLE_DROP); 
    onCreate(db); 
}

所以，这里的问题，我如何创建数据库（以及在哪里？在其他类中）以及如何填充这些表。我知道我的问题看起来很模糊，但我整天都在搜索，而我放弃了。或者你有一个很好的教程的链接。

我已经开始用这种方法谁必须用我的数据库用户方法。但正如我前面所说，没有创建数据库。

public static void createPerson(User user,SQLiteDatabase db){ 
    db.execSQL("insert into"+TABLE_PERSON+"values ("+user.getLoginStr()+", "+user.getPlaceStr()+", "+user.getPlaceStr()+", "+user.getFirstNameStr()+", "+user.getNameStr()+", "+user.getBirthdayStr()+", "+user.getLanguageStr()+", "+user.getHairStr()+", "+user.getEyesStr()+", "+user.getPassword()+", "+user.getDescriptionStr()+", "+user.getGenderStr()+", "+user.getOrientationStr()); 
}

谢谢很多，如果你能帮助我，或者你读过我

来源

2016-04-28 Cariamole

尝试这些链接http://www.javatpoint.com/android-sqlite-tutorial http://www.tutorialspoint.com/android/android_sqlite_database.htm

用于插入使用此代码

DatabaseHandler databaseHandler = new DatabaseHandler(context); 
SQLiteDatabase sql = databaseHandler.getWritableDatabase(); 
ContentValues values = new ContentValues(); 
values.put(KEY_NAME, value); 
values.put(KEY_NAME, value); 
sql.insert(TABLE_Name, null, values); 
sql.close();

来源

2016-04-28 18:17:07

在android项目上创建数据库

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