我认为您错过了检查此功能。请检查道
public class UserDao extends AbstractDao<User, Long> {
public static final String TABLENAME = "USER";
/**
* Properties of entity User.<br/>
* Can be used for QueryBuilder and for referencing column names.
*/
public static class Properties {
public final static Property Id = new Property(0, Long.class, "Id", true, "_id");
public final static Property Name = new Property(1, String.class, "name", false, "NAME");
}
public UserDao(DaoConfig config) {
super(config);
}
public UserDao(DaoConfig config, DaoSession daoSession) {
super(config, daoSession);
}
/** Creates the underlying database table. */
public static void createTable(Database db, boolean ifNotExists) {
String constraint = ifNotExists? "IF NOT EXISTS ": "";
db.execSQL("CREATE TABLE " + constraint + "\"USER\" (" + //
"\"_id\" INTEGER PRIMARY KEY AUTOINCREMENT ," + // 0: Id
"\"NAME\" TEXT);"); // 1: name
}
/** Drops the underlying database table. */
public static void dropTable(Database db, boolean ifExists) {
String sql = "DROP TABLE " + (ifExists ? "IF EXISTS " : "") + "\"USER\"";
db.execSQL(sql);
}
@Override
protected final void bindValues(DatabaseStatement stmt, User entity) {
stmt.clearBindings();
Long Id = entity.getId();
if (Id != null) {
stmt.bindLong(1, Id);
}
String name = entity.getName();
if (name != null) {
stmt.bindString(2, name);
}
}
@Override
protected final void bindValues(SQLiteStatement stmt, User entity) {
stmt.clearBindings();
Long Id = entity.getId();
if (Id != null) {
stmt.bindLong(1, Id);
}
String name = entity.getName();
if (name != null) {
stmt.bindString(2, name);
}
}
@Override
public Long readKey(Cursor cursor, int offset) {
return cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0);
}
@Override
public User readEntity(Cursor cursor, int offset) {
User entity = new User( //
cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0), // Id
cursor.isNull(offset + 1) ? null : cursor.getString(offset + 1) // name
);
return entity;
}
@Override
public void readEntity(Cursor cursor, User entity, int offset) {
entity.setId(cursor.isNull(offset + 0) ? null : cursor.getLong(offset + 0));
entity.setName(cursor.isNull(offset + 1) ? null : cursor.getString(offset + 1));
}
@Override
protected final Long updateKeyAfterInsert(User entity, long rowId) {
entity.setId(rowId);
return rowId;
}
@Override
public Long getKey(User entity) {
if(entity != null) {
return entity.getId();
} else {
return null;
}
}
@Override
public boolean hasKey(User entity) {
return entity.getId() != null;
}
@Override
protected final boolean isEntityUpdateable() {
return true;
}
}
整个项目都可以在这里找到。我认为您需要保留一些类似的支票。在 UserDao 中。