SQLite数据库：第二张表不会添加新产品

Question

我正在做一个项目，其中有两个表，一个存储应用程序的用户，另一个存储用户输入的产品。用户表工作正常，但是当我看着我的logcat我发现没有产品被输入到产品表中。数据库处理程序中的addproduct方法没有错误，所以我想知道我在做什么错误？数据库处理程序中的问题还是我添加产品的方式？任何帮助将非常感激？ 数据库处理代码：

import java.util.ArrayList; 
import java.util.List; 

import android.content.ContentValues; 
import android.content.Context; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import com.example.john.fitnessapp.Products; 
import com.example.john.fitnessapp.Users; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.util.Log; 


public class DatabaseHandler extends SQLiteOpenHelper { 
    public static final String TAG = "DBHelper"; 
    //DATABASE VERSION 
    private static int DATABASE_VERSION = 1; 
    //DATABASE NAME 
    private static final String DATABASE_NAME = "AppDatabase"; 
    //TABLE NAMES 
    private static final String TABLE_USERS = "Users_Table"; 
    private static final String TABLE_PRODUCTS = "Products_Table"; 
    //COMMON COLUMN NAMES 
    private static final String KEY_USER_ID = "User_ID"; 
    private static final String KEY_PRODUCT_ID = "Product_ID"; 
    //USER TABLE 
    private static final String KEY_USERNAME = "Username"; 
    private static final String KEY_PASSWORD = "Password"; 
    private static final String KEY_AGE = "Age"; 
    private static final String KEY_EMAIL = "Email"; 
    private static final String KEY_GENDER = "Gender"; 
    private static final String KEY_HEIGHT = "Height"; 
    private static final String KEY_CURRENT_WEIGHT = "Current_Weight"; 
    private static final String KEY_START_WEIGHT = "Start_Weight"; 
    private static final String KEY_WEIGHT_CHANGE = "Weight_Change"; 
    private static final String KEY_BMI = "BMI"; 
    private static final String KEY_BMR = "BMR"; 
    private static final String KEY_REQ_CAL = "Required_Calories"; 
    private static final String KEY_MON_CAL = "Monday_Calories"; 
    private static final String KEY_TUES_CAL = "Tuesday_Calories"; 
    private static final String KEY_WED_CAL = "Wednesday_Calories"; 
    private static final String KEY_THUR_CAL = "Thursday_Calories"; 
    private static final String KEY_FRI_CAL = "Friday_Calories"; 
    private static final String KEY_SAT_CAL = "Saturday_Calories"; 
    private static final String KEY_SUN_CAL = "Sunday_Calories"; 
    //PRODUCT TABLE 
    private static final String KEY_ITEMNAME = "Item_name"; 
    private static final String KEY_ITEMCALORIES = "Item_Calories"; 
    // 
    private static final String CREATE_USER_TABLE = "CREATE TABLE " + TABLE_USERS + "(" 
      + KEY_USER_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
      + KEY_USERNAME + " TEXT, " 
      + KEY_PASSWORD + " TEXT, " 
      + KEY_AGE + " INTEGER, " 
      + KEY_EMAIL + " TEXT, " 
      + KEY_GENDER + " TEXT, " 
      + KEY_HEIGHT + " DOUBLE, " 
      + KEY_START_WEIGHT + " DOUBLE, " 
      + KEY_CURRENT_WEIGHT + " DOUBLE, " 
      + KEY_WEIGHT_CHANGE + " DOUBLE, " 
      + KEY_BMI + " DOUBLE, " 
      + KEY_BMR + " DOUBLE, " 
      + KEY_REQ_CAL + " DOUBLE, " 
      + KEY_MON_CAL + " DOUBLE, " 
      + KEY_TUES_CAL + " DOUBLE, " 
      + KEY_WED_CAL + " DOUBLE, " 
      + KEY_THUR_CAL + " DOUBLE, " 
      + KEY_FRI_CAL + " DOUBLE, " 
      + KEY_SAT_CAL + " DOUBLE, " 
      + KEY_SUN_CAL + " DOUBLE); "; 

    private static final String CREATE_PRODUCT_TABLE = "CREATE TABLE " + TABLE_PRODUCTS + "(" + KEY_PRODUCT_ID + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
      + KEY_ITEMNAME + " TEXT, " 
      + KEY_ITEMCALORIES + " DOUBLE);"; 

    public DatabaseHandler(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 

    } 

    public void onCreate(SQLiteDatabase db) { 
     db.execSQL(CREATE_USER_TABLE); 
     db.execSQL(CREATE_PRODUCT_TABLE); 
    } 

    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     Log.w(TAG, 
       "Upgrading the database from version " + oldVersion + " to " + newVersion); 
     DATABASE_VERSION = 2; 
     db.execSQL("DROP TABLE IF IT EXISTS " + TABLE_USERS); 
     db.execSQL("DROP TABLE IF IT EXISTS " + TABLE_PRODUCTS); 
     onCreate(db); 

    } 

    //CRUD OPERATIONS 

    public Users getUser(int id) { 
     SQLiteDatabase db = this.getReadableDatabase(); 

     Cursor cursor = db.query(TABLE_USERS, 
       new String[]{KEY_USER_ID, KEY_USERNAME, KEY_PASSWORD, KEY_AGE, 
         KEY_EMAIL, KEY_GENDER, KEY_HEIGHT, KEY_START_WEIGHT, 
         KEY_CURRENT_WEIGHT, KEY_WEIGHT_CHANGE, KEY_BMI, KEY_BMR, 
         KEY_REQ_CAL, KEY_MON_CAL, KEY_TUES_CAL, KEY_WED_CAL, 
         KEY_THUR_CAL, KEY_FRI_CAL, KEY_SAT_CAL, KEY_SUN_CAL}, 
       KEY_USER_ID + "=?", 
       new String[]{String.valueOf(id)}, null, null, null, null); 
     if (cursor != null && cursor.getCount() > 0) 
      cursor.moveToFirst(); 

     Users users = new Users(Integer.parseInt(cursor.getString(0)), cursor.getString(1), 
       cursor.getString(2), cursor.getInt(3), cursor.getString(4), cursor.getString(5), 
       cursor.getDouble(6), cursor.getDouble(7), cursor.getDouble(8), cursor.getDouble(9), 
       cursor.getDouble(10), cursor.getDouble(11), cursor.getDouble(12), cursor.getDouble(13), 
       cursor.getDouble(14), cursor.getDouble(15), cursor.getDouble(16), cursor.getDouble(17), cursor.getDouble(18), cursor.getDouble(19)); 
     cursor.close(); 
     return users; 

    } 

    public void addUser(Users users) { 
     SQLiteDatabase db = this.getWritableDatabase(); 
     ContentValues values = new ContentValues(); 
     values.put(KEY_USERNAME, users.get_username()); 
     values.put(KEY_PASSWORD, users.get_password()); 
     values.put(KEY_AGE, users.get_age()); 
     values.put(KEY_EMAIL, users.get_email()); 
     values.put(KEY_GENDER, users.get_gender()); 
     values.put(KEY_HEIGHT, users.get_height()); 
     values.put(KEY_START_WEIGHT, users.get_startWeight()); 
     values.put(KEY_CURRENT_WEIGHT, users.get_currentWeight()); 
     values.put(KEY_WEIGHT_CHANGE, users.get_weightChange()); 
     values.put(KEY_BMI, users.get_BMI()); 
     values.put(KEY_BMR, users.get_BMR()); 
     values.put(KEY_REQ_CAL, users.get_reqCal()); 
     values.put(KEY_MON_CAL, users.get_monCal()); 
     values.put(KEY_TUES_CAL, users.get_tuesCal()); 
     values.put(KEY_WED_CAL, users.get_wedCal()); 
     values.put(KEY_THUR_CAL, users.get_thurCal()); 
     values.put(KEY_FRI_CAL, users.get_friCal()); 
     values.put(KEY_SAT_CAL, users.get_satCal()); 
     values.put(KEY_SUN_CAL, users.get_sunCal()); 

     db.insert(TABLE_USERS, null, values); 
     db.close(); 
    } 

    public int getUserCount() { 
     String countQuery = "SELECT * FROM " + TABLE_USERS; 
     SQLiteDatabase db = this.getReadableDatabase(); 
     Cursor cursor = db.rawQuery(countQuery, null); 
     int count = cursor.getCount(); 
     cursor.close(); 
     return count; 

    } 

    public int updateUser(Users users) { 
     SQLiteDatabase db = this.getWritableDatabase(); 

     ContentValues values = new ContentValues(); 
     values.put(KEY_USERNAME, users.get_username()); 
     values.put(KEY_PASSWORD, users.get_password()); 
     values.put(KEY_AGE, users.get_age()); 
     values.put(KEY_EMAIL, users.get_email()); 
     values.put(KEY_GENDER, users.get_gender()); 
     values.put(KEY_HEIGHT, users.get_height()); 
     values.put(KEY_START_WEIGHT, users.get_startWeight()); 
     values.put(KEY_CURRENT_WEIGHT, users.get_currentWeight()); 
     values.put(KEY_WEIGHT_CHANGE, users.get_weightChange()); 
     values.put(KEY_BMI, users.get_BMI()); 
     values.put(KEY_BMR, users.get_BMR()); 
     values.put(KEY_REQ_CAL, users.get_reqCal()); 
     values.put(KEY_MON_CAL, users.get_monCal()); 
     values.put(KEY_TUES_CAL, users.get_tuesCal()); 
     values.put(KEY_WED_CAL, users.get_wedCal()); 
     values.put(KEY_THUR_CAL, users.get_thurCal()); 
     values.put(KEY_FRI_CAL, users.get_friCal()); 
     values.put(KEY_SAT_CAL, users.get_satCal()); 
     values.put(KEY_SUN_CAL, users.get_sunCal()); 

     return db.update(TABLE_USERS, values, KEY_USER_ID + " = ?", 
       new String[]{String.valueOf(users.get_id())}); 
    } 

    public List<Users> getallUsers() { 
     List<Users> usersList = new ArrayList<Users>(); 
     String selectQuery = "SELECT * FROM " + TABLE_USERS; 
     SQLiteDatabase db = this.getWritableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 

     if (cursor.moveToFirst()) { 
      do { 
       Users users = new Users(); 
       users.set_id(Integer.parseInt(cursor.getString(0))); 
       users.set_username(cursor.getString(1)); 
       users.set_password(cursor.getString(2)); 
       users.set_age(cursor.getInt(3)); 
       users.set_email(cursor.getString(4)); 
       users.set_gender(cursor.getString(5)); 
       users.set_height(cursor.getDouble(6)); 
       users.set_startWeight(cursor.getDouble(7)); 
       users.set_currentWeight(cursor.getDouble(8)); 
       users.set_weightChange(); 
       users.set_BMI(cursor.getDouble(10)); 
       users.set_BMR(cursor.getDouble(11)); 
       users.set_reqCal(cursor.getDouble(12)); 
       users.set_monCal(cursor.getDouble(13)); 
       users.set_tuesCal(cursor.getDouble(14)); 
       users.set_wedCal(cursor.getDouble(15)); 
       users.set_thurCal(cursor.getDouble(16)); 
       users.set_friCal(cursor.getDouble(17)); 
       users.set_satCal(cursor.getDouble(18)); 
       users.set_sunCal(cursor.getDouble(19)); 
       usersList.add(users); 
      } while (cursor.moveToNext()); 
     } 
     return usersList; 
     } 




public List<Products> getallProducts(){ 
    ArrayList<Products> productList = new ArrayList<Products>(); 
    String selectQuery = "SELECT * FROM " + TABLE_PRODUCTS; 
    SQLiteDatabase db = this.getReadableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 
    if(cursor.moveToFirst()){ 
     do { 
      Products products = new Products(); 
      products.set_id(cursor.getInt(0)); 
      products.set_itemName(cursor.getString(1)); 
      products.set_itemCalorie(cursor.getDouble(2)); 
     }while (cursor.moveToNext()); 
    } 
    cursor.close(); 
    return productList; 

} 

public void addProduct(Products products){ 
    SQLiteDatabase db = getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(KEY_ITEMNAME, products.get_itemName()); 
    values.put(KEY_ITEMCALORIES, products.get_itemCalorie()); 

    db.insert(TABLE_PRODUCTS, null, values); 
    db.close(); 
} 
public int getProductCount(){ 
    String countQuery = "SELECT * FROM " + TABLE_PRODUCTS; 
    SQLiteDatabase db = getReadableDatabase(); 
    Cursor cursor = db.rawQuery(countQuery, null); 
    int count = cursor.getCount(); 
    cursor.close(); 
    return count; 
} 

Answer 1

我希望产品列表插入table.But你错过的产品添加到列表中

public List<Products> getallProducts() { 
     ArrayList<Products> productList = new ArrayList<Products>(); 
     String selectQuery = "SELECT * FROM " + TABLE_PRODUCTS; 
     SQLiteDatabase db = this.getReadableDatabase(); 
     Cursor cursor = db.rawQuery(selectQuery, null); 
     if (cursor.moveToFirst()) { 
      do { 
       Products products = new Products(); 
       products.set_id(cursor.getInt(0)); 
       products.set_itemName(cursor.getString(1)); 
       products.set_itemCalorie(cursor.getDouble(2)); 

productList.add（产品）;

  } while (cursor.moveToNext()); 
     } 
     cursor.close(); 
     return productList; 

    }