...
  for(int l=0; l<jsonarraySub.length(); l++){
        JSONObject obj = jsonarraySub.getJSONObject(l);

        String stIdProd = obj.getString("codigo");

        TextView qtd = new TextView(CardapioActivity.this);
        qtd.setText("1");
        qtd.setTextColor(Color.parseColor("#ffffff"));
        qtd.setId(Integer.parseInt(stIdProd));
        qtd.setTextSize((float) 20);

        rl4.addView(qtd);
...

        RelativeLayout.LayoutParams paramsMenos = new RelativeLayout.LayoutParams(70,66);
        paramsMenos.topMargin = 322;
        paramsMenos.leftMargin = x+640;
        menos[l].setLayoutParams(paramsMenos);
        menos[l].setId(Integer.parseInt(stIdProd));
        menos[l].setBackgroundResource(R.drawable.btnmenos);

        menos[l].setOnClickListener(new Button.OnClickListener() {
            public void onClick(View v){
               setMenos(stIdProd);
            }
        });

}
...

/*Decrease value of a textview
 */
 public void setMenos(String id){

     ????

 }

/*Decrease value of a textview
 */
 public void setMenos(String id){

     value--;
     qtd.setText(value.toString());

 }