Question

大家好，很多天过去了，我又读了很多例子和帖子。但我又是新手请不要踢我。我认为问题不是很好但我要解释我在android DB上有3个表这是三个表

TABLE_ITEMS
TABLE_PRIHOD（它的输入）
商品的TABLE_RASHOD（它的输出）。

我想将id_goods用于所有产品名称，但我没有练习。

现在我可以，我必须在不同的2个表中保存数据库并将它们带到不同的 listview 。

我想先将所有id_goods保存在TABLE_ITEMS中，然后保存到TABLE_PRIHOD，因为我认为我的所有商品名称都更容易在DB上工作。我知道我做错了。

HERE是示例

保存在TABLE_PRIHOD（输入）id 1 books 2014.02.12 500 pieces 2 $。
在保存到TABLE_PRIHOD之前，我想将书籍保存到TABLE_ITEMS以将其作为id_goods。
将它用于TABLE_PRIHOD（输入）不写为书籍，而是从TABLE_ITEMS写入其ID。

我的想象：（id）1（id_goods）1（日期）2014.02.12。（金额）500（成本）2

My full CODE is here in this LINK pastie

public class DBHandlerImpl extends SQLiteOpenHelper implements  DBHandler<Goods>{
     // all DB-variabls here


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

@Override
public void onCreate(SQLiteDatabase db) {
    String query = "create table " + TABLE_ITEMS + "(" + ID + " integer primary key autoincrement, " + ID_GOODS + " integer);";
    db.execSQL(query);

     query = "create table " + TABLE_PRIHOD + "(" + ID_PRIHOD + " integer primary key autoincrement, " +
                                                     GOODS + " TEXT, " +
                                                     DATE + " TEXT, " +
                                                     AMOUNT + " INTEGER, " +
                                                     COST + " INTEGER);";
    db.execSQL(query);

    query = "create table " + TABLE_RASHOD + "(" + ID_PRODANO + " integer primary key autoincrement, " +
                                                    PRODANO + " TEXT, " +
                                                    PRODANO_DATE + " TEXT, " +
                                                    PRODANO_AMOUNT + " INTEGER, " +
                                                    PRODANO_COST + " INTEGER);";
    db.execSQL(query);
}

@Override
public void onUpgrade(SQLiteDatabase db, int i, int i2) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_ITEMS);
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_PRIHOD);
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_RASHOD);
    onCreate(db);
}

@Override
public void addItemsId(Goods goods) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(GOODS, goods.getName_goods());
    db.insert(TABLE_ITEMS, null, values);
    db.close();
}

@Override
public void addPrihod(Goods goods) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
 //   values.put(ID, goods.getId());
    values.put(GOODS, goods.getName_goods());
    values.put(DATE, goods.getDate());
    values.put(AMOUNT, goods.getAmount());
    values.put(COST, goods.getCost());
    db.insert(TABLE_PRIHOD, null, values);
    db.close();
}

@Override
public void addRashod(Goods goods) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(PRODANO, goods.getName_goods());
    values.put(PRODANO_DATE, goods.getDate());
    values.put(PRODANO_AMOUNT, goods.getAmount());
    values.put(PRODANO_COST, goods.getCost());
    db.insert(TABLE_RASHOD, null, values);
    db.close();
}
public class Prihod extends Activity{
     //all variables are here

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.prihod);
    //initialize code here 
    //findViewById also located here


}

public void saveTovar(View v){
    AlertDialog.Builder builder = new AlertDialog.Builder(Prihod.this);
    builder.setTitle("Потдвердить сохранение...");
    builder.setMessage("Вы уверены, что хотите сохранить?");
    builder.setIcon(R.drawable.save);
    builder.setPositiveButton("Да", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
           goods = new Goods(1,edtTovar.getText().toString(),
                                editDate.getText().toString(),
                                editAmount.getText().toString(),
                                editCost.getText().toString());
            db.addPrihod(goods);
            Toast.makeText(getApplicationContext(), "Новый товар сохранен!", Toast.LENGTH_SHORT).show();
        }
    });

    builder.setNegativeButton("Нет", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

    builder.show();
}`  `public class Rashod extends Activity{
private DBHandler<Goods> db;
private Goods goods;
private EditText editRashod;
private EditText editDateRashod;
private EditText editAmountRashod;
private EditText editCostRashod;
private Button btn_rashod_save;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.rashod);
    TextView textTovar = (TextView)findViewById(R.id.textTovar);
    TextView textDate = (TextView)findViewById(R.id.textDate);
    TextView textAmount = (TextView)findViewById(R.id.textAmount);
    TextView textCost = (TextView)findViewById(R.id.textCost);
    editRashod = (EditText)findViewById(R.id.editRashod);
    editDateRashod = (EditText)findViewById(R.id.editDateRashod);
    editAmountRashod = (EditText)findViewById(R.id.editAmountRashod);
    editCostRashod = (EditText)findViewById(R.id.editCostRashod);
    btn_rashod_save = (Button)findViewById(R.id.btn_rashod_save);
    db = new DBHandlerImpl(this);
}

Answer 1

如果我理解正确，你想先将商品插入TABLE_ITEMS，然后使用TABLE_PRIHOD中插入的TABLE_ITEM记录的id？

如果是这样，您可以在addItemsId中返回插入的ID，因为db.insert会返回新插入的行http://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html#insert(java.lang.String,%20java.lang.String,%20android.content.ContentValues)的ID

这看起来像这样

@Override
public long addItemsId(Goods goods) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(GOODS, goods.getName_goods());
    long goods_id = db.insert(TABLE_ITEMS, null, values);
    db.close();

    return goods_id;
}

@Override
public void addPrihod(Goods goods) {

    long goods_id = addItemsId(goods);
    // -1 means an error occured
    if(goods_id != -1){

        goods.setId(goods_id);
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();

        values.put(ID_GOODS, goods_id);
        values.put(GOODS, goods.getName_goods());
        values.put(DATE, goods.getDate());
        values.put(AMOUNT, goods.getAmount());
        values.put(COST, goods.getCost());
        db.insert(TABLE_PRIHOD, null, values);
        db.close();
     }
}

如何保存到第二个表并保存之前将其放到第一个表中

1 个答案: