我创建了一个模型类来存储我的产品名称，价格和数量，然后将其附加到另一个Fragment并尝试在我的TextView中显示。不幸的是{I} ArrayList我无法获得商品的位置。以下是我的代码段。我需要帮助。
Modelclass Arr_Model.Java
public class Arr_Model {
private String BRAND_NAME;
private String BRNAD_PRICE;
private String QTY ;
public Arr_Model(){}
public String getBRAND_NAME() {
return BRAND_NAME;
}
public String getQTY() {
return QTY;
}
public void setBRAND_NAME(String BRAND_NAME) {
this.BRAND_NAME = BRAND_NAME;
}
public void setBRNAD_PRICE(String BRNAD_PRICE) {
this.BRNAD_PRICE = BRNAD_PRICE;
}
public void setQTY(String QTY) {
this.QTY = QTY;
}
public String getBRNAD_PRICE() {
return BRNAD_PRICE;
}
}
这里我从响应中获取值并将其存储在arraylist
ProductDetail.java
1）首先我从响应中获取数据，它是产品名称及其价格
类LoadAlbums扩展了AsyncTask＆gt;＆gt; { / ** *在开始后台线程显示进度对话框之前 * * /
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(All_Product_Details.this.getActivity());
pDialog.setMessage("Loading...");
pDialog.setIndeterminate(true);
pDialog.setCancelable(false);
pDialog.show();
}
protected ArrayList<HashMap<String,String>> doInBackground(String... args) {
ServiceHandler sh = new ServiceHandler();
String jsonStr = sh.makeServiceCall(USER_URL, ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
JSONObject pname = jsonObj.getJSONObject(PRODUCT_MAIN);
System.out.println("Jsonobject product>>" + pname);
JSONArray sizes = new JSONArray();
sizes = pname.getJSONArray("attributes");
for (int j = 0; j < sizes.length(); j++) {
JSONObject jsonnewtwo = sizes.getJSONObject(j);
option = jsonnewtwo.getJSONArray("options");
System.out.println("Option---" + option);
}
System.out.println("Attribute size" + sizes);
user_name = pname.getString(USER_NAME);
prod_price = pname.getString(PRODUCT_PRICE);
prod_desc = pname.getString(PRODUCT_DESC);
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.e("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
protected void onPostExecute(ArrayList<HashMap<String,String>> result) {
super.onPostExecute(result);
if (pDialog.isShowing())
pDialog.dismiss();
if(user_name.equals(""))
{
uname.setText("Not Available");
}
else
{
uname.setText(user_name);
}
if(prod_price.equals(""))
{
pprice.setText("Not Available");
}
else
{
pprice.setText(dollars+prod_price);
}
if(prod_desc.equals(""))
{
general_desc.setText("Not Available");
}
else
{
general_desc.setText(Html.fromHtml(prod_desc).toString());
}
2）然后我增加产品数量并点击添加到购物车按钮，点击添加到购物车我在arraylist中保存数据..
btn_add_to_cart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
cartincrement();
productnams = GenericUtility.getStringFromSharedPrefsForKey("selected_prodname", getActivity());
//System.out.println("Seleced user name=-=-=-=-=-=-==-=" + productnams);
productprc = GenericUtility.getStringFromSharedPrefsForKey("selected_prodprc", getActivity());
//System.out.println("Seleced prodprice=-=-=-=-=-=-==-=" + productprc);
Arr_Model product = new Arr_Model();
product.setBRAND_NAME(user_name);
product.setBRNAD_PRICE(prod_price);
product.setQTY(_value.getText().toString());
productArraylist.add(product);
System.out.println("TEst--" + productArraylist.get(0).getBRAND_NAME());
}
});
//System.out.println("Test--" + productArraylist.get(0).getBRAND_NAME());
mBTIncrement.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
increment();
}
});
_decrease.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
decrement();
}
});
3）然后我点击购物车图标查看我添加了哪个项目及其数量
relcart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
_value.setText("1");
Add_to_cart tf = new Add_to_cart();
android.support.v4.app.FragmentManager fm = getFragmentManager();
android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.frame_container, tf);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
}
});
}
4）现在最后一步显示listview中的项目到下一个片段
public class Add_to_cart extends Fragment {
private Button continue_shopping;
private Button checkout;
ListView list;
private TextView _decrease,mBTIncrement,_value;
private CustomListAdapter adapter;
private ArrayList<String> alst;
private ArrayList<String> alstprc;
private String bname;
private ArrayList<Arr_Model> productArraylist;
public Add_to_cart(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.list_view_addtocart, container, false);
productArraylist = All_Product_Details.productArraylist;
// alst=new ArrayList<String>();
// Bundle bundle = this.getArguments();
// alst = bundle.getStringArrayList("prodnam");
//consts.arr = new ArrayList<String>();
//consts.arr = alst;
// System.out.println("NAM--" + productArraylist);
// Bundle bundle1 = this.getArguments();
// alstprc = bundle1.getStringArrayList("prodprc");
/*
adapter = new CustomListAdapter(getActivity(),alst);
list=(ListView)rootView.findViewById(R.id.list_addtocart);
list.setAdapter(adapter);
adapter.notifyDataSetChanged();
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
}
});*/
return rootView;
}
public class CustomListAdapter extends BaseAdapter {
private Context context;
private ArrayList<Arr_Model> listData;
//private AQuery aQuery;
String dollars="\u0024";
public CustomListAdapter(Context context,ArrayList<Arr_Model> listData) {
this.context = context;
this.listData=listData;
// aQuery = new AQuery(this.context);
}
@Override
public int getCount() {
return listData.size();
}
@Override
public Object getItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(getActivity()).inflate(R.layout.list_item_addtocart, null);
holder.txtproname = (TextView) convertView.findViewById(R.id.proname_addtocart);
holder.txtprofilecast = (TextView) convertView.findViewById(R.id.proprice_addtocart);
_decrease = (TextView)convertView.findViewById(R.id.minuss_addtocart);
mBTIncrement = (TextView)convertView.findViewById(R.id.plus_addtocart);
_value = (EditText)convertView.findViewById(R.id.edt_procount_addtocart);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
mBTIncrement.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
increment();
}
});
_decrease.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
decrement();
}
});
/* for(int i=0;i<productArraylist.size();i++)
{
holder.txtproname.setText(productArraylist.get(0));
}
holder.txtprofilecast.setText(dollars+alstprc.get(position));*/
// aQuery.id(holder.propic).image(listData.get(position).get(TAG_IMAGE),true,true,0,R.drawable.ic_launcher);
return convertView;
}
class ViewHolder{
ImageView propic;
TextView txtproname;
TextView txtprofilecast;
}
答案 0 :(得分：0)
relcart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
_value.setText("1");
Add_to_cart tf = new Add_to_cart();
tf.setList(productArraylist);
android.support.v4.app.FragmentManager fm = getFragmentManager();
android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.frame_container, tf);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
}
});
在Fragment中添加以下方法。
public void setList(ArrayList<Arr_Model> p_productArraylist) {
productArraylist = p_productArraylist;
}
答案 1 :(得分：0)
首先创建一个这样的应用程序类，
公共类Applicationc扩展了Application {
public String str;
@Override
public void onCreate() {
super.onCreate();
str=null;
}
}
在清单中创建这样的条目
然后在onPost of Async Task中按以下方式设置值，
Applicationc app =（Applicationc）getApplicatoncotext（）; app.str =＆＃34;数据＆＃34 ;;
您希望以下列方式检索价值，
Applicationc app =（Applicationc）getApplicatoncotext（）; String dd = app.str;
答案 2 :(得分：0)
我无法真正遵循所有这些代码。如果我理解正确，那么您在Activity，AsyncTask和Fragment之间传递数据时遇到问题。这里一个好的架构是让Activity跟踪数据。 Fragment始终可以向Activity询问数据，AsyncTask也可以回拨Activity来更新数据。
如果这还不足以解决您的问题，请准确说明您遇到问题的地方。