get null value for arraylist on next activity

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http://stackoverflow.com – please help me.i want to pass array list of item name,quantity,amount and rate from make order activity to next activity confirm order...but on next activity getting null value for that array list what can i do ? code of make order Intent intent = new Intent(MakeOrder.this,Demo.class); intent.putStringArrayListExtra("selectedItems",strItemNameAlert); intent.putStringArrayListExtra("selectedRates",strRateAlert); intent.putStringArrayListExtra("selectedQuantity",strQuantityAlert); intent.putStringArrayListExtra("selectedAmount",strAmountAlert); intent.putStringArrayListEx (HowTos)