关于ListView 显示的有关问题 ！

关于ListView 显示的问题 在线等！！！！！
首先上我的代码：

 LinearLayout layout;

		 layout=(LinearLayout)findViewById(R.id.llclass);

		 layout.setOrientation(LinearLayout.HORIZONTAL);  

		 

		 LinearLayout.LayoutParams lp=new LinearLayout.LayoutParams(

					ViewGroup.LayoutParams.WRAP_CONTENT,

					ViewGroup.LayoutParams.WRAP_CONTENT);


		  DatabaseHelper dbhelper=new DatabaseHelper(CheakOutActivity.this,"jxc");

		  SQLiteDatabase db=dbhelper.getReadableDatabase();

		  Cursor cursor=db.query("pcategory", null, null, null, null, null, null);

		  if(cursor.getCount()>0)

		  {

			  Button Btn[] = new Button[cursor.getCount()];

			  int i=0;

			  while(cursor.moveToNext())

			  {

				  final String pid=cursor.getString(cursor.getColumnIndex("_id")); 

				  String classname=cursor.getString(cursor.getColumnIndex("category")); 

				  Btn[i]=new Button(this);

				  Btn[i].setId(2000+i); 

			      Btn[i].setText(classname);

			      

			      Btn[i].setOnClickListener(new Button.OnClickListener() {

					@Override

					public void onClick(View v) {

						// TODO Auto-generated method stub

						lvgoods=(ListView) findViewById(R.id.GoodsListView);  

						DatabaseHelper dbhelper1=new DatabaseHelper(CheakOutActivity.this,"jxc");

						SQLiteDatabase db1=dbhelper1.getReadableDatabase();

						Cursor cursor1=db1.query("category", null, "pid='"+pid+"'", null, null, null, null);

						 SimpleCursorAdapter adapter = new SimpleCursorAdapter(CheakOutActivity.this, R.layout.my_listitemcoclass, cursor1,new String[]{"category","fenliang","price"}, new int[]{R.id.Goodsname,R.id.Goodsfl,R.id.Goodsprice});  

		                 lvgoods.setAdapter(adapter);  

		                 Toast.makeText(CheakOutActivity.this, "父类ID:"+pid+"--"+cursor1.getCount(), 500).show(); 

		        	     db1.close();

		                

		                 

		        	     lvgoods.setOnItemClickListener(new ItemClickListener());  

		        	     

		        	     

					}

			      

			      });

			      

			      

			      layout.addView(Btn[i],lp);

Button 都可以正常显示  点击button 的时候Toast.makeText(CheakOutActivity.this, "父类ID:"+pid+"--"+cursor1.getCount(), 500).show();   这一行也可以打印出来  而且cursor1.getCount()是大于0的  代表有查询到数据  但listview lvgoods 里面没有显示任何数据  也没有报错  郁闷 不知道从那有问题 请大侠们指教  一下 谢谢！