データベースに製品を保存中にエラーが発生しました

Question

在庫管理アプリケーションで新しい製品を保存または追加する際に、データベースを保存する際にエラーが発生しました。数量とは関係がありますが、解決方法がわかりませんそれは構文エラーです。私はそれを理解できません。まず、データベースが間違っていると認識していませんでしたが、正しく変更してもまだ動作しません。

EditorActivity.java

package com.example.bahubali.inventoryapp; 

import android.content.ContentValues; 
import android.database.sqlite.SQLiteDatabase; 
import android.os.Bundle; 
import android.support.v4.app.NavUtils; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.ArrayAdapter; 
import android.widget.EditText; 
import android.widget.Spinner; 
import android.widget.Toast; 

import com.example.bahubali.inventoryapp.data.ProductContract; 
import com.example.bahubali.inventoryapp.data.ProductDbHelper; 

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

public class EditorActivity extends AppCompatActivity { 

    /*Edit text field to enter the product name*/ 
    private EditText mNameEditText; 

    /*Edit text field to enter the product price*/ 
    private EditText mPriceEditText; 

    /*Edit text field to enter the product quantity*/ 
    private Spinner mQuantitySpinner; 

    /*Edit text field to enter the name of the supplier*/ 
    private EditText mSupplierText; 

    /*Quantity of the product is varying so the default value of the product*/ 

    private int mQuantity; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_editor); 

     //Find all the relevant views that we will need to read the input from 
     mNameEditText = (EditText)findViewById(R.id.edit_text_name); 
     mPriceEditText = (EditText) findViewById(R.id.edit_text_price); 

     mSupplierText = (EditText) findViewById(R.id.edit_text_supplier); 
     mQuantitySpinner =(Spinner) findViewById(R.id.spinner_quantity); 
     List<Integer> list = new ArrayList<Integer>(); 
     list.add(1); 
     list.add(2); 
     list.add(3); 
     list.add(4); 
     list.add(5); 
     list.add(6); 
     list.add(7); 
     ArrayAdapter<Integer> quantitySpinnnerAdapter = new ArrayAdapter<Integer>(this, 
       R.layout.support_simple_spinner_dropdown_item,list); 
     mQuantitySpinner.setAdapter(quantitySpinnnerAdapter); 


    } 

    /** 
    * Get user input from editor and save new pet into database. 
    */ 
    private void insertProduct(){ 
     // Read from input fields 
     // Use trim to eliminate leading or trailing white space 
     String productNameString = mNameEditText.getText().toString().trim(); 
     String productPriceString = mPriceEditText.getText().toString().trim(); 
     String productSupplierString = mSupplierText.getText().toString().trim(); 
     int price = Integer.parseInt(productPriceString); 

     //Create database helper 
     ProductDbHelper productDbHelper = new ProductDbHelper(this); 

     //Get the database in the write mode 
     SQLiteDatabase db = productDbHelper.getWritableDatabase(); 

     // Create a ContentValues object where column names are the keys, 
     // and pet attributes from the editor are the values. 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(ProductContract.ProductEntry.COLUMN_PRODUCT_NAME,productNameString); 
     contentValues.put(ProductContract.ProductEntry.COLUMN_PRODUCT_PRICE,price); 
     contentValues.put(String.valueOf(ProductContract.ProductEntry.COLUMN_PRODUCT_QUANTITY),mQuantity); 
     contentValues.put(ProductContract.ProductEntry.COLUMN_PRODUCT_SUPPLIER,productSupplierString); 


     //Insert a new row for the product in the database,returning ID of that new row 
     long newRowId = db.insert(ProductContract.ProductEntry.TABLE_NAME,null,contentValues); 

     // Show a toast message depending on whether or not the insertion was successful 
     if (newRowId == -1) { 
      // If the row ID is -1, then there was an error with insertion. 
      Toast.makeText(this, "Error with saving product", Toast.LENGTH_SHORT).show(); 
     } else { 
      // Otherwise, the insertion was successful and we can display a toast with the row ID. 
      Toast.makeText(this, "Product saved with row id: " + newRowId, Toast.LENGTH_SHORT).show(); 
     } 



    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu options from the res/menu/menu_editor.xml file. 
     // This adds menu items to the app bar. 
     getMenuInflater().inflate(R.menu.menu_editor, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // User clicked on a menu option in the app bar overflow menu 
     switch (item.getItemId()){ 
      // Respond to a click on the "Save" menu option 
      case R.id.action_save: 
       insertProduct(); 
       finish(); 
       return true; 
      case R.id.action_delete: 
       // Do nothing for now 
       return true; 
      // Respond to a click on the "Up" arrow button in the app bar 
      case android.R.id.home: 
       // Navigate back to parent activity (CatalogActivity) 
       NavUtils.navigateUpFromSameTask(this); 
       return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

LogCat：あなたは私のすべての文字列変数は、これはMVCデザインコンセプトの一部であるモデルクラスに住んであなたのデータを収集する方法

10-11 11:41:21.256 5125-5125/com.example.bahubali.inventoryapp E/SQLiteDatabase: Error inserting Product name=Rwf Price=100 Supplier=Fdg Quantity=0 
                       android.database.sqlite.SQLiteException: near "name": syntax error (code 1): , while compiling: INSERT INTO inventory(Product name,Price,Supplier,Quantity) VALUES (?,?,?,?) 
                        at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method) 
                        at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887) 
                        at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:498) 
                        at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588) 
                        at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58) 
                        at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31) 
                        at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1469) 
                        at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1341) 
                        at com.example.bahubali.inventoryapp.EditorActivity.insertProduct(EditorActivity.java:92) 
                        at com.example.bahubali.inventoryapp.EditorActivity.onOptionsItemSelected(EditorActivity.java:121) 
                        at android.app.Activity.onMenuItemSelected(Activity.java:2918) 
                        at android.support.v4.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:368) 
                        at android.support.v7.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:195) 
                        at android.support.v7.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:108) 
                        at android.support.v7.app.AppCompatDelegateImplV9.onMenuItemSelected(AppCompatDelegateImplV9.java:674) 
                        at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:822) 
                        at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:171) 
                        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:973) 
                        at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:963) 
                        at android.support.v7.widget.ActionMenuView.invokeItem(ActionMenuView.java:624) 
                        at android.support.v7.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:150) 
                        at android.view.View.performClick(View.java:5207) 
                        at android.view.View$PerformClick.run(View.java:21168) 
                        at android.os.Handler.handleCallback(Handler.java:746) 
                        at android.os.Handler.dispatchMessage(Handler.java:95) 
                        at android.os.Looper.loop(Looper.java:148) 
                        at android.app.ActivityThread.main(ActivityThread.java:5443) 
                        at java.lang.reflect.Method.invoke(Native Method) 
                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 

Answer 1

わかりません。私はリンクを含めるようにしますあなたはこのデザインを持っていないようですが、私はあなたがDBHelperクラスを作成したかどうかわかりませんDBを管理することはとても簡単ですここでは、ボタンとetQuestion電気ショック療法あなたがTABLEに名前を付けるために、私は文字列変数に持ってここにこの偉大な一つの奇妙を試してみたい場合は、そのための土器なるので、本当にMVCのデザインを見て

MVC Link

private void addListenerOnButtonSave() { 
    btnSave.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View view) { 

      // 1. get reference to writable DB 
      db = dbHelper.getWritableDatabase(); 

      // 2. create ContentValues to add key "column"/value 
      ContentValues cv = new ContentValues(); 

      cv.put(Col_QUESTION,etQuestion.getText().toString().trim()); 
      cv.put(Col_ANS_ONE,etAnsOne.getText().toString().trim()); 
      cv.put(Col_COR_ANS_ONE,etCorAnsOne.getText().toString().trim()); 
      cv.put(Col_ANS_TWO,etAnsTwo.getText().toString().trim()); 
      cv.put(Col_COR_ANS_TWO,etCorAnsTwo.getText().toString().trim()); 
      cv.put(Col_ANS_THREE,etAnsThree.getText().toString().trim()); 
      cv.put(Col_COR_ANS_THREE,etCorAnsThree.getText().toString().trim()); 

      // 3. insert 
      final String QUIZ_INFO = "theBOT"; 
      db.insert(QUIZ_INFO, null, cv); 
      // 4. close 
      db.close(); 

      Toast.makeText(PageTwo.this, "Record Added", Toast.LENGTH_LONG).show(); 
      //doDrop(); 
      //dbHelper.iDid(); //Call to method in DBHelper -----<<<< READ 
     } 
    }); 
} 

という名前のEditTextフィールドの束