Android SQL exception

My Logs is:

09-04 09:04:39.997  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ Late-enabling CheckJNI
09-04 09:04:40.185  18653-18653/com.example.yahya.sqlitesample I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.internal.widget.TintTypedArray.getChangingConfigurations
09-04 09:04:40.185  18653-18653/com.example.yahya.sqlitesample W/dalvikvm﹕ VFY: unable to resolve virtual method 410: Landroid/content/res/TypedArray;.getChangingConfigurations ()I
09-04 09:04:40.185  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
09-04 09:04:40.185  18653-18653/com.example.yahya.sqlitesample I/dalvikvm﹕ Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.internal.widget.TintTypedArray.getType
09-04 09:04:40.189  18653-18653/com.example.yahya.sqlitesample W/dalvikvm﹕ VFY: unable to resolve virtual method 432: Landroid/content/res/TypedArray;.getType (I)I
09-04 09:04:40.189  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample I/dalvikvm﹕ Could not find method android.content.res.Resources.getDrawable, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawable
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample W/dalvikvm﹕ VFY: unable to resolve virtual method 373: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample I/dalvikvm﹕ Could not find method android.content.res.Resources.getDrawableForDensity, referenced from method android.support.v7.internal.widget.ResourcesWrapper.getDrawableForDensity
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample W/dalvikvm﹕ VFY: unable to resolve virtual method 375: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable;
09-04 09:04:40.237  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ VFY: replacing opcode 0x6e at 0x0002
09-04 09:04:40.425  18653-18653/com.example.yahya.sqlitesample D/libEGL﹕ loaded /system/lib/egl/libEGL_genymotion.so
09-04 09:04:40.425  18653-18653/com.example.yahya.sqlitesample D/﹕ HostConnection::get() New Host Connection established 0xb938abe0, tid 18653
09-04 09:04:40.465  18653-18653/com.example.yahya.sqlitesample D/libEGL﹕ loaded /system/lib/egl/libGLESv1_CM_genymotion.so
09-04 09:04:40.465  18653-18653/com.example.yahya.sqlitesample D/libEGL﹕ loaded /system/lib/egl/libGLESv2_genymotion.so
09-04 09:04:40.665  18653-18653/com.example.yahya.sqlitesample W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
09-04 09:04:40.701  18653-18653/com.example.yahya.sqlitesample E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from GradienCache
09-04 09:04:40.713  18653-18653/com.example.yahya.sqlitesample E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
09-04 09:04:40.757  18653-18653/com.example.yahya.sqlitesample E/OpenGLRenderer﹕ Getting MAX_TEXTURE_SIZE from Caches::initConstraints()
09-04 09:04:40.769  18653-18653/com.example.yahya.sqlitesample E/OpenGLRenderer﹕ MAX_TEXTURE_SIZE: 16384
09-04 09:04:40.769  18653-18653/com.example.yahya.sqlitesample D/OpenGLRenderer﹕ Enabling debug mode 0
09-04 09:04:46.777  18653-18653/com.example.yahya.sqlitesample E/SQLiteLog﹕ (1) near "productname": syntax error
09-04 09:04:46.781  18653-18653/com.example.yahya.sqlitesample D/AndroidRuntime﹕ Shutting down VM
09-04 09:04:46.781  18653-18653/com.example.yahya.sqlitesample W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4d5fb20)
09-04 09:04:46.789  18653-18653/com.example.yahya.sqlitesample E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.yahya.sqlitesample, PID: 18653
    java.lang.IllegalStateException: Could not execute method of the activity
            at android.view.View$1.onClick(View.java:3823)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.database.sqlite.SQLiteException: near "productname": syntax error (code 1): , while compiling: CREATE TABLE products(_id INTEGER PRIMARY KEY AUTOINCREMENT productname TEXT );
            at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
            at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:889)
            at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:500)
            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.executeSql(SQLiteDatabase.java:1672)
            at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1603)
            at com.example.yahya.sqlitesample.MyDBHandler.onCreate(MyDBHandler.java:34)
            at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:252)
            at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164)
            at com.example.yahya.sqlitesample.MyDBHandler.addProduct(MyDBHandler.java:49)
            at com.example.yahya.sqlitesample.MainActivity.addButtonClicked(MainActivity.java:33)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5001)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
            at dalvik.system.NativeStart.main(Native Method)
09-04 09:04:46.797  18653-18653/com.example.yahya.sqlitesample D/dalvikvm﹕ GC_FOR_ALLOC freed 240K, 9% free 3282K/3576K, paused 5ms, total 6ms
09-04 09:04:50.669  18653-18653/com.example.yahya.sqlitesample I/Process﹕ Sending signal. PID: 18653 SIG: 9

MyDBHandler:

package com.example.yahya.sqlitesample;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.DatabaseErrorHandler;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class MyDBHandler extends SQLiteOpenHelper
{
    private static final int DATABASE_VERSION  = 1;
    private static final String DATABASE_NAME  = "products.db";
    public  static final String TABLE_PRODUCTS = "products";
    public  static final String COLUMN_ID  = "_id";
    public  static final String COLUMN_PRODUCTNAME = "productname";

    public MyDBHandler(Context context, String name, SQLiteDatabase.CursorFactory factory, int version)
    {
        super(context, DATABASE_NAME, factory, DATABASE_VERSION);
    }


    @Override
    public void onCreate(SQLiteDatabase db)
    {
        String query = "CREATE TABLE " + TABLE_PRODUCTS + "(" +
                COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT " +
                COLUMN_PRODUCTNAME + " TEXT " +
                ");";
        db.execSQL(query);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
    {
        db.execSQL("DROP  TABLE IF EXISTS " + TABLE_PRODUCTS);
        onCreate(db);
    }

    //Add a new item to the db
    public void addProduct(Products product)
    {
        ContentValues values = new ContentValues();
        values.put(COLUMN_PRODUCTNAME, product.get_productname());
        SQLiteDatabase db = getWritableDatabase();
        db.insert(TABLE_PRODUCTS, null, values);
        db.close();

    }

    //Delete a product from db
    public void deleteProduct(String name)
    {
        SQLiteDatabase db = getWritableDatabase();
        db.execSQL("DELETE FROM " + TABLE_PRODUCTS + " WHERE " + COLUMN_PRODUCTNAME + "=\"" + name + "\";");
    }

    //Print out the database as String
    public String dbToString()
    {
        String dbString  = new String();
        SQLiteDatabase db = getWritableDatabase();
        String query = "SELECT * FROM " + TABLE_PRODUCTS + " WHERE 1";

        Cursor c = db.rawQuery(query, null);
        c.moveToFirst();

        while(!c.isAfterLast())
        {
            if(c.getString(c.getColumnIndex("productname"))!=null)
            {
                dbString += c.getString((c.getColumnIndex("productname")));
                dbString += "\n";
            }
        }

        db.close();
        return dbString;

    }

}

The Main activity class is:

package com.example.yahya.sqlitesample;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity
{
    EditText yTextInout;
    TextView yTextView;
    MyDBHandler dbHandler;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        yTextInout = (EditText) findViewById(R.id.yText);
        yTextView   = (TextView) findViewById(R.id.ytextView);
        dbHandler = new MyDBHandler(this,null, null, 1);
        printDataBase();
    }

    public void addButtonClicked(View view)
    {
          Products product = new Products(yTextInout.toString());
         dbHandler.addProduct(product);
         printDataBase();
    }

    public void deleteButtonClicked(View view)
    {
        String productName = yTextInout.getText().toString();
        dbHandler.deleteProduct(productName);
       // printDataBase();
    }

    public void printDataBase()
    {
        String dbString = dbHandler.dbToString();
        yTextView.setText(dbString);
        yTextInout.setText("");
    }



}

The products class:

package com.example.yahya.sqlitesample;

/**
 * Created by Yahya on 9/3/2015.
 */
public class Products
{
    private int _id;
    private String _productname;

    public Products()
    {

    }

    public Products(String productName)
    {
        this._productname = productName;
    }

    public void set_id(int _id)
    {
        this._id = _id;
    }

    public void set_productname(String _productName)
    {
        this._productname = _productName;
    }

    public int get_id()
    {
        return _id;
    }

    public String get_productname()
    {
        return _productname;
    }
}

and the activity_main.xml:

<EditText
    android:layout_width="300dp"
    android:layout_height="wrap_content"
    android:id="@+id/yText"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="75dp"
    android:layout_height="wrap_content"
    android:text="Add"
    android:id="@+id/addButton"
    android:layout_below="@+id/yText"
    android:layout_alignLeft="@+id/yText"
    android:layout_alignStart="@+id/yText"
    android:layout_marginTop="30dp"
    android:onClick="addButtonClicked" />

<Button
    android:layout_width="80dp"
    android:layout_height="wrap_content"
    android:text="Delete"
    android:id="@+id/deleteButton"
    android:layout_alignBottom="@+id/addButton"
    android:layout_alignRight="@+id/yText"
    android:layout_alignEnd="@+id/yText"
    android:onClick="deleteButtonClicked" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Large Text"
    android:id="@+id/ytextView"
    android:layout_centerVertical="true"
    android:layout_toRightOf="@+id/addButton"
    android:layout_toEndOf="@+id/addButton" />

When I want to run my code, it makes an exception and quits the program with unfortunately the hass been stopped. Please help me to fix the exception.