@Override
public boolean onKeyUp(int keyCode, KeyEvent event) {
    String str_array="";
    if(keyCode==KeyEvent.KEYCODE_ENTER){
        for(char ch:arrayList){
            str_array+=String.valueOf(ch);
        }
        Toast.makeText(this,"BarCode : "+str_array, Toast.LENGTH_SHORT).show();
        arrayList.clear();
    }
    return super.onKeyUp(keyCode, event);
}