Question

在我的应用程序中，我必须创建一个包含2列和5行的表。现在我需要一次更新5个值。我有1个屏幕，其中5个EditText和一个保存Button。点击保存后，5个编辑框中的值应该在数据库中更新。可以有人帮我查询了吗？先谢谢。

我的表结构是：

id    name
1     wee
2     fvfb
3     erer
4     fgfg
5     fggfg

private static final String DATABASE_CREATE =

"create table incomexpense(_id integer primary key autoincrement,"+"price text not null,description text not null,"+"quantity text not null,"+"total text not null,"+"category text not null,"+"recurrence text not null,"+"date text not null,"+"groups text not null);";


private static final String DATABASE_TABLESPIN = "create table spinner(_id primary key autoincrement,"+" spin text not null);";

但只显示一个表？帮我..

Answer 1

此类将创建一个表..您可以创建编辑此类的必填字段。

public class TableCreater extends SQLiteOpenHelper 
{

    public static final String DATABASE_NAME = "userregister.db";
    public static final int VERSION = 1;

    public static final String TABLE_NAME = "USER_SESSION";

    public static final String COLUMN_ID = "_id";
    public static final String USER_ID = "user_id";

    public static final String TABLE_CREATE =

    "create table " + TABLE_NAME + " (" + COLUMN_ID
            + " integer primary key autoincrement," + USER_ID + " integer);";

    public static final String FIRST_QUERY = "insert into " + TABLE_NAME
            + " (user_id) values(0);";

    public loginchecker(Context context) {
        super(context, DATABASE_NAME, null, VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(TABLE_CREATE);
        db.execSQL(FIRST_QUERY);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub
        Log.w(loginchecker.class.getName(),
                "Upgrading database from version " + oldVersion + " to "
                        + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);

    }

}

此方法将更新表格中的数据。您可以根据需要进行修改

public InsertingClass InsertID(int uid) 
    {
        ContentValues values = new ContentValues();
        values.put(loginchecker.USER_ID, uid);
        long insertedId = database.insert(loginchecker.TABLE_NAME, null,
                values);
        Cursor cursor = database.query(loginchecker.TABLE_NAME, allColumnsLogin,
                loginchecker.COLUMN_ID + " = " + insertedId, null, null,
                null, null);
        cursor.moveToFirst();
        return cursorToModel(cursor);
    }

Answer 2

有关创建表格的信息，请参阅SQLiteOpenHelper。对于使用数据库的crud操作，请参阅ContentProvider

Answer 3

试试这个：

public boolean updateValue(long rowId, String useridvalue)
{
    ContentValues args = new ContentValues();
    args.put(USER_ID, useridvalue);
    return db.update(TABLE_NAME, args,
            COLUMN_ID + "=" + rowId, null) > 0;
}

android中的数据库操作

3 个答案: