求教，的使用方法有哪些？

Posted 2023-04-03

参考技术A 如果你是想让第二个精灵跟着第一个精灵 你可以把第二个精灵加到第一个身上啊 另外CCFollow的用法是这样的: 例如map是地图（比屏幕尺寸大），role是人 map:runAction(CCFollow:create(role))

Android SQLiteOpenHelper无法创建数据表，求教

package com.example.yolga;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;

public class dbOpenHelper extends SQLiteOpenHelper

//public static final int VERSION = 1;
//public static final String DB_NAME = "login.db"; //数据库名
public dbOpenHelper (Context context, String name, CursorFactory factory, int version)

super(context, name, factory, version);

/**
public dbOpenHelper(Context context, String name, int version)
this(context, name, null, version);


public dbOpenHelper(Context context)
this(context, DB_NAME, null, VERSION);

*/
@Override
public void onCreate(SQLiteDatabase db)

String sql = "CREATE TABLE logintb(_id INTEGER PRIMARY KEY, username VARCHAR, password VARCHAR)";
db.execSQL(sql);


@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVsersion)





regbtn.setOnClickListener(new Button.OnClickListener()

@Override
public void onClick(View v)
EditText et1 = (EditText) findViewById(R.id.et01);
EditText et2 = (EditText) findViewById(R.id.et02);
//EditText et3 = (EditText) findViewById(R.id.et03);

cv.put("username", et1.getText().toString());
cv.put("password", et2.getText().toString());
long res = sqldb.insert(DB_TABLE , null, cv);
这是调用代码

参考技术A 哇哇哇哇哇哇哇哇