如果项目名称相同，则Arraylist重复条目
我的代码
中遇到了问题该方案
从微调器添加项目时，它会被添加到侧面列表中
并且在按下订单按钮之前第一次将其文本设置为蓝色，您也可以修改数量
- 你添加第二个项目
- 按下订单按钮后，订单信息被发送到数据库，文本设置为黄色，订单已下，您不应该修改项目
- 您将不同的项添加到下一个订单
- 你下了第二个订单
- 如果您添加相同的项目'Captain Morgan'，那么它会被添加到第二个订单
以下是处理上述操作的所有代码
我正在使用两个片段MainFragment和SideFragment
SidePanelFragment.java
public class SidePanelFragment extends android.app.Fragment {
ListView list1;
ArrayList<Items> itemsArray = new ArrayList<Items>();
ItemsAdapter1 adapter = null;
boolean isPresent = false;
Button btnCancel;
Button btnOrder;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_side_panel, container, false);
list1 = (ListView) view.findViewById(R.id.listViewSide);
btnCancel=(Button)view.findViewById(R.id.button);
btnCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int i=0;i<itemsArray.size();i++){
if(!itemsArray.get(i).Ordered)
itemsArray.remove(i);
}
//itemsArray.clear();
adapter.notifyDataSetChanged();
}
});
btnOrder=(Button)view.findViewById(R.id.btnOrder);
btnOrder.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int i=0;i<itemsArray.size();i++){
if(!itemsArray.get(i).Ordered) {
// itemsArray.get(i).
itemsArray.get(i).Ordered = true;
}
}
adapter.notifyDataSetChanged();
}
});
adapter = new ItemsAdapter1(getActivity(), itemsArray);
adapter.notifyDataSetChanged();
list1.invalidateViews();
list1.setAdapter(adapter);
return view;
}
public void getAddedItems(Items item) {
for (int i = 0; i < itemsArray.size(); i++) {
if (item.ItemName == itemsArray.get(i).ItemName) {
int quant = itemsArray.get(i).prevQuant;
item.quantity = item.quantity + quant;
itemsArray.set(i, item);
itemsArray.get(i).prevQuant = item.quantity;
isPresent = true;
}
}
if (!isPresent) {
itemsArray.add(item);
itemsArray.get(itemsArray.size() - 1).prevQuant = item.quantity;
}
isPresent = false;
adapter = new ItemsAdapter1(getActivity(), itemsArray);
adapter.notifyDataSetChanged();
list1.invalidateViews();
list1.setAdapter(adapter);
}
class ItemsAdapter1 extends BaseAdapter {
Context context;
ArrayList<Items> itemList;
ItemsAdapter1(Context context, ArrayList<Items> itemList1) {
itemList = new ArrayList<Items>();
this.context = context;
itemList = itemList1;
}
@Override
public int getCount() {
return itemList.size();
}
@Override
public Object getItem(int position) {
return itemList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
class ViewHolder {
TextView txtView1;
TextView txtView2;
TextView txtView3;
ImageButton imgBtn;
Button btnQuantPlus;
Button btnQuantMinus;
ViewHolder(final View V) {
txtView1 = (TextView) V.findViewById(R.id.txtSideItemName);
txtView2 = (TextView) V.findViewById(R.id.txtSideQuant);
txtView3 = (TextView) V.findViewById(R.id.txtAmountSide);
//if (itemList.get().Ordered==false)
imgBtn = (ImageButton) V.findViewById(R.id.btndelete);
btnQuantPlus=(Button)V.findViewById(R.id.btnQuantPlus);
btnQuantMinus=(Button)V.findViewById(R.id.btnQuantMinus);
}
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflator = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View row = convertView;
ViewHolder holder = null;
if (row == null) {
row = inflator.inflate(R.layout.side_panel_list, parent, false);
holder = new ViewHolder(row);
} else {
holder = (ViewHolder) row.getTag();
}
Items it = itemList.get(position);
holder.txtView1.setText(it.ItemName);
holder.txtView2.setText(String.valueOf(it.Price));
holder.txtView3.setText(String.valueOf(it.quantity));
if(itemList.get(position).Ordered==false) {
holder.btnQuantMinus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if ((itemList.get(position).quantity) > 1) {
Items it = new Items();
it = itemList.get(position);
it.quantity = it.prevQuant - 1;
it.prevQuant = it.quantity;
itemList.set(position, it);
adapter.notifyDataSetChanged();
}
}
});
holder.btnQuantPlus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// if(it.quantity>1)
Items it = new Items();
it = itemList.get(position);
it.quantity = it.prevQuant + 1;
it.prevQuant = it.quantity;
itemList.set(position, it);
adapter.notifyDataSetChanged();
}
});
holder.imgBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
itemList.remove(position);
adapter.notifyDataSetChanged();
}
});
}
else
{
holder.imgBtn.setVisibility(View.GONE);
holder.btnQuantMinus.setVisibility(View.GONE);
holder.btnQuantPlus.setVisibility(View.GONE);
}
//holder.imgBtn.setVisibility(View.GONE);
row.setTag(holder);
holder.txtView3.setText(String.valueOf(itemList.get(position).quantity));
setRowColor(row,position);
return row;
}
private void setRowColor(View view, int var) {
if(itemList.get(var).Ordered==true){
view.setBackgroundColor(Color.parseColor("#e7ff00"));
}else
view.setBackgroundColor(Color.parseColor("#4585f2"));
//view.setBackgroundColor(Color.rgb(0,0,255));
}
}
}
MainPanelFragment.java
public class MainPanelFragment extends android.app.Fragment implements View.OnClickListener {
Spinner spinner;
//ArrayList<String> listCatagories= null;
ItemsAdapter adapter;
ArrayAdapter adapter1;
CategoriesAdapter catAdapter;
ListView list;
TextView itemName;
TextView itemPrice;
EditText quantity;
Button quantPlus;
Button quantMinus;
Button addItem;
int quantCount=1;
ArrayList<Categories> catForAdapter=null;
public String selectedItemName="";
public double selectedItemPrice=0;
public Items selectedItem=null;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view =inflater.inflate(R.layout.fragment_order_menu,container,false);
spinner=(Spinner)view.findViewById(R.id.spinnerCatagory);
list=(ListView)view.findViewById(R.id.listView);
itemName=(TextView)view.findViewById(R.id.textViewItem);
itemName.setText("Select an item");
quantity=(EditText)view.findViewById(R.id.editText);
quantity.setText(String.valueOf(quantCount));
quantity.setEnabled(false);
quantPlus=(Button)view.findViewById(R.id.buttonPlus);
quantMinus=(Button)view.findViewById(R.id.buttonMinus);
//addItem=(Button)view.findViewById(R.id.btnAdd);
quantPlus.setEnabled(false);
quantMinus.setEnabled(false);
itemPrice=(TextView)view.findViewById(R.id.textViewPrice);
final ArrayAdapter<String> spinnerArrayAdapter =new ArrayAdapter<String>(this.getActivity(), android.R.layout.simple_spinner_item, catagories);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
catAdapter= new CategoriesAdapter(this.getActivity(),catForAdapter);
spinner.setAdapter(catAdapter);
(this.getActivity(),android.R.layout.simple_list_item_1, drinks);
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectedItem=(Items)parent.getItemAtPosition(position);
selectedItemName=selectedItem.ItemName;
selectedItemPrice=selectedItem.Price;
itemName.setText(selectedItemName);
itemPrice.setText(String.valueOf(selectedItemPrice));
quantPlus.setEnabled(true);
quantMinus.setEnabled(true);
quantCount=1;
quantity.setText(String.valueOf(quantCount));
addItem.setEnabled(true);
// Toast.makeText(getActivity().getApplicationContext(),selectedItem, Toast.LENGTH_LONG).show();
}
});
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
addItem.setEnabled(false);
Categories ct= new Categories();
ct= (Categories)spinner.getSelectedItem();
SoapCallClass s= new SoapCallClass();
adapter=new ItemsAdapter(getActivity(),s.getItemsForCategory(ct.TOUCHCODE));
quantCount=1;
quantity.setText(String.valueOf(quantCount));
itemName.setText("Select Item");
itemPrice.setText("0.00");
quantPlus.setEnabled(false);
quantMinus.setEnabled(false);
list.setAdapter(adapter);
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
}
});
quantPlus.setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
quantCount++;
quantity.setText(String.valueOf(quantCount));
itemPrice.setText(String.valueOf(quantCount*selectedItemPrice));
}
}
);
quantMinus.setOnClickListener(
new View.OnClickListener() {
public void onClick(View v) {
if(quantCount>1)
quantCount--;
quantity.setText(String.valueOf(quantCount));
itemPrice.setText(String.valueOf(quantCount*selectedItemPrice));
}
}
);
return view;
}
OnAddItemPressed addItemPressed;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
addItemPressed=(OnAddItemPressed)getActivity();
addItem=(Button)getActivity().findViewById(R.id.btnAdd);
addItem.setOnClickListener(this);
}
@Override
public void onClick(View v) {
selectedItem.quantity= quantCount;
selectedItem.Ordered=false;
addItemPressed.onAddItemPressed(selectedItem);
addItem.setEnabled(false);
quantCount=1;
quantity.setText(String.valueOf(quantCount));
itemName.setText("Select Item");
itemPrice.setText("0.00");
quantPlus.setEnabled(false);
quantMinus.setEnabled(false);
}
}
class Items{
public String ItemName;
public int ItemCode;
public double Price;
public int quantity;
public int prevQuant;
public String RESCODE;
public int KOTDATE;
public int KOTNUB;
public int KOTTYP;
public int STEWCODE;
public String TBLNUB;
public int PAXPER;
public String PERSON;
public String SESSON;
public int SRLNUMB;
public float ITMQTY;
public float ITMRAT;
public float ITMVAL;
public int TAXSTR;
public String KITCOD;
public int MENTYP;
public int GRPCOD;
public int BILNUB;
public int UPDFLG;
public int BILSEQ;
public int LSTDAT;
public String LSTTIM;
public String USERID;
public float NCKPER;
public String MODNAM;
public String RORDER;
public boolean Ordered;
}
class ItemsAdapter extends BaseAdapter {
ArrayList<Items> itemList;
Context context;
ItemsAdapter(Context context, ArrayList<Items> itemsArray) {
itemList = new ArrayList<Items>();
this.context = context;
itemList=itemsArray;
}
@Override
public int getCount() {
return itemList.size();
}
@Override
public Object getItem(int position) {
return itemList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
class ViewHolder {
TextView txtView1;
TextView txtView2;
ViewHolder(View V) {
txtView1 = (TextView) V.findViewById(R.id.txtItemName);
txtView2=(TextView) V.findViewById(R.id.txtItemPrice);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflator = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View row = convertView;
ViewHolder holder = null;
if (row == null) {
row = inflator.inflate(R.layout.single_item, parent, false);
holder = new ViewHolder(row);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
Items it = itemList.get(position);
holder.txtView1.setText(it.ItemName);
holder.txtView2.setText(String.valueOf(it.Price));
return row;
}
}
class CategoriesAdapter extends BaseAdapter {
ArrayList<Categories> catList;
Context context;
CategoriesAdapter(Context context, ArrayList<Categories> catArray) {
catList = new ArrayList<Categories>();
this.context = context;
catList=catArray;
}
@Override
public int getCount() {
return catList.size();
}
@Override
public Object getItem(int position) {
return catList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
class ViewHolder {
TextView txtView1;
//TextView txtView2;
ViewHolder(View V) {
txtView1 = (TextView) V.findViewById(R.id.txtcatrel);
// txtView2=(TextView) V.findViewById(R.id.txtItemPrice);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflator = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
View row = convertView;
ViewHolder holder = null;
if (row == null) {
row = inflator.inflate(R.layout.categorylyt, parent, false);
holder = new ViewHolder(row);
row.setTag(holder);
} else {
holder = (ViewHolder) row.getTag();
}
Categories ct = catList.get(position);
holder.txtView1.setText(ct.Name);
return row;
}
}
从主面板按下添加项目按钮的代码（文本几乎不可见的按钮）
OnAddItemPressed addItemPressed;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
addItemPressed=(OnAddItemPressed)getActivity();
addItem=(Button)getActivity().findViewById(R.id.btnAdd);
addItem.setOnClickListener(this);
}
@Override
public void onClick(View v) {
selectedItem.quantity= quantCount;
selectedItem.Ordered=false;
addItemPressed.onAddItemPressed(selectedItem);
addItem.setEnabled(false);
quantCount=1;
quantity.setText(String.valueOf(quantCount));
itemName.setText("Select Item");
itemPrice.setText("0.00");
quantPlus.setEnabled(false);
quantMinus.setEnabled(false);
}
}
在Menu.java中实现的接口代码
@Override
public void onAddItemPressed(Items item){
FragmentManager manager= getFragmentManager();
SidePanelFragment sideObj= (SidePanelFragment) manager.findFragmentById(R.id.side_panel);
sideObj.getAddedItems(item);
}
下订单的代码
btnOrder.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for(int i=0;i<itemsArray.size();i++){
if(!itemsArray.get(i).Ordered) {
// itemsArray.get(i).
itemsArray.get(i).Ordered = true;
}
}
adapter.notifyDataSetChanged();
}
});
adapter = new ItemsAdapter1(getActivity(), itemsArray);
adapter.notifyDataSetChanged();
list1.invalidateViews();
list1.setAdapter(adapter);
return view;
}
用于填充和显示列表视图中的项目的代码
public void getAddedItems(Items item) {
for (int i = 0; i < itemsArray.size(); i++) {
if (item.ItemName == itemsArray.get(i).ItemName) {
int quant = itemsArray.get(i).prevQuant;
item.quantity = item.quantity + quant;
itemsArray.set(i, item);
itemsArray.get(i).prevQuant = item.quantity;
isPresent = true;
}
}
if (!isPresent) {
itemsArray.add(item);
itemsArray.get(itemsArray.size() - 1).prevQuant = item.quantity;
}
isPresent = false;
adapter = new ItemsAdapter1(getActivity(), itemsArray);
adapter.notifyDataSetChanged();
list1.invalidateViews();
list1.setAdapter(adapter);
}
将商品添加到订单并下订单后，来自Ordered类的Item的{{1}}属性设置为true
现在，
如果您选择商品并点击下订单然后添加相同的商品，订购商品的Items属性会在下订单后立即成为Ordered false它会被添加到那个地方并变成蓝色，这不应该发生。如果你添加不同的项目并下订单，那么这个问题就不会出现了。希望我已经正确地解释了我的问题。
2 个答案:
答案 0 :(得分：0)
您在项目本身上设置了有序标志，并在您点击后立即将其重置为false。您应该考虑在引用项目本身之外的其他地方管理有序标志。您可能希望使用已订购项目列表来管理订单对象。
有缺陷的代码
@Override
public void onClick(View v) {
selectedItem.quantity= quantCount;
selectedItem.Ordered=false; // Here you reset the flag of "reference" item
addItemPressed.onAddItemPressed(selectedItem);
addItem.setEnabled(false);
quantCount=1;
quantity.setText(String.valueOf(quantCount));
itemName.setText("Select Item");
itemPrice.setText("0.00");
quantPlus.setEnabled(false);
quantMinus.setEnabled(false);
}
答案 1 :(得分：0)
此代码段解决了问题
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
selectedItem=new Items();
Items getItms=(Items)parent.getItemAtPosition(position);
selectedItem.ItemCode=getItms.ItemCode;
selectedItem.ItemName=getItms.ItemName;
selectedItem.Price=getItms.Price;
selectedItemName=selectedItem.ItemName;
selectedItemPrice=selectedItem.Price;
itemName.setText(selectedItemName);
itemPrice.setText(String.valueOf(selectedItemPrice));
quantPlus.setEnabled(true);
quantMinus.setEnabled(true);
quantCount=1;
quantity.setText(String.valueOf(quantCount));
addItem.setEnabled(true);
// Toast.makeText(getActivity().getApplicationContext(),selectedItem, Toast.LENGTH_LONG).show();
}
});
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