Android电子拍卖系统总结四

五、管理拍卖物品

ManageItem.java

package com.lq.auction;import android.app.Fragment;import android.content.Intent;import android.os.Bundle;public class ManageItem extends FragmentActivity implements Callbacks{    @Override    public Fragment getFragment() {        return new ManageItemFragment();    }    @Override    public void onItemSelected(Integer id, Bundle bundle) {        //当用户单击“添加”按钮时，将会启动AddItem Activity        Intent i = new Intent(this,AddItem.class);        startActivity(i);    }}

manage_item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:gravity="center" >    <LinearLayout         android:orientation="horizontal"        android:gravity="center"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="@dimen/sub_title_margin">        <LinearLayout             android:orientation="vertical"            android:layout_gravity="center"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:paddingLeft="12dp">            <TextView                 android:text="@string/manage_item"                android:textSize="@dimen/label_font_size"                android:layout_width="wrap_content"                android:layout_height="wrap_content"/>                        <Button                 android:id="@+id/bnAdd"                android:layout_width="85dp"                android:layout_height="30dp"                android:background="@drawable/add_item"/>        LinearLayout>        <Button             android:id="@+id/bn_home"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="@dimen/label_font_size"            android:background="@drawable/home"/>    LinearLayout>    <ListView         android:id="@+id/itemList"        android:layout_width="match_parent"        android:layout_height="match_parent">    ListView>LinearLayout>

ManageItemFragment.java

package com.lq.auction;public class ManageItemFragment extends Fragment {    public static final int ADD_ITEM = 0x1006;    Button bnHome, bnAdd;    ListView itemList;    Callbacks mCallbacks;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {        View rootView = inflater.inflate(R.layout.manage_item, container, false);        //获取界面上的“返回”按钮        bnHome = (Button) rootView.findViewById(R.id.bn_home);        bnAdd= (Button) rootView.findViewById(R.id.bnAdd);        itemList = (ListView) rootView.findViewById(R.id.itemList);        //为“返回”按钮的单击事件绑定事件监听器        bnHome.setOnClickListener(new HomeListener(getActivity()));        bnAdd.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                mCallbacks.onItemSelected(ADD_ITEM, null);            }        });        //定义发送请求的URL        String url = HttpUtil.BASE_URL + "viewOwnerItem.jsp";  //getArguments()?        try {            //向指定的URL发送请求，并把服务器响应转换成JSONArray对象            JSONArray jsonArray = new JSONArray(HttpUtil.getRequest(url));            //将JSONArray包装成Adapter            JSONArrayAdapter adapter = new JSONArrayAdapter(getActivity()                    , jsonArray, "name", true);            itemList.setAdapter(adapter);                   } catch (Exception e) {            DialogUtil.showDialog(getActivity(), "服务器异常，请稍后再试", false);            e.printStackTrace();        }        itemList.setOnItemClickListener(new OnItemClickListener(){            @Override            public void onItemClick(AdapterView<?> parent, View view, int position,                    long id) {                //查看指定物品的详细情况                viewItemBid(position);                          }                   });                 return rootView;    }    //当该Fragment被添加、显示到Activity时，回调该方法    @Override    public void onAttach(Activity activity) {        super.onAttach(activity);        if(!(activity instanceof Callbacks)){            //如果Activity没有实现Callbacks接口，抛出异常            throw new IllegalStateException(                    "ManageitemFragment所在的Activity必须实现Callbacks接口");        }        //把该Activity当成Callbacks对象         mCallbacks = (Callbacks) activity;    }    @Override    public void onDetach() {        super.onDetach();        //将mCallbacks赋为null        mCallbacks = null;    }    private void viewItemBid(int position) {        //加载detail_in_bid.xml界面布局代表的视图        View detailView = getActivity().getLayoutInflater()                .inflate(R.layout.detail_in_bid, null);        //获取detail_in_bid.xml界面布局中的文本框        TextView itemName = (TextView) detailView.findViewById(R.id.itemName);        TextView itemKind = (TextView) detailView.findViewById(R.id.itemKind);        TextView maxPrice = (TextView) detailView.findViewById(R.id.maxPrice);        TextView initPrice = (TextView) detailView.findViewById(R.id.initPrice);        TextView endTime = (TextView) detailView.findViewById(R.id.endTime);        TextView itemRemark = (TextView) detailView.findViewById(R.id.itemRemark);        //获取被单击的列表项        JSONObject jsonObj = (JSONObject) itemList.getAdapter().getItem(position);        try {            //通过文本框显示物品详情            itemName.setText(jsonObj.getString("name"));            itemKind.setText(jsonObj.getString("kind"));            initPrice.setText(jsonObj.getString("initPrice"));            endTime.setText(jsonObj.getString("endTime"));            maxPrice.setText(jsonObj.getString("maxPrice"));            itemRemark.setText(jsonObj.getString("desc"));        } catch (JSONException e) {            e.printStackTrace();        }        DialogUtil.showDialog(getActivity(), detailView);       }}

detail_in_bid.xml

<?xml version="1.0" encoding="utf-8"?><TableLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:stretchColumns="1">    <TableRow>        <TextView             android:text="@string/item_name"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/itemName"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>    TableRow>    <TableRow>        <TextView             android:text="@string/item_kind"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/itemKind"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>          TableRow>    <TableRow>        <TextView             android:text="@string/win_price"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/maxPrice"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>          TableRow>    <TableRow>        <TextView             android:text="@string/init_price"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/initPrice"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>          TableRow>    <TableRow>        <TextView             android:text="@string/end_time"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/endTime"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>          TableRow>            <TableRow>        <TextView             android:text="@string/remark"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <TextView             android:id="@+id/itemRemark"            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="@style/tv_show"/>           TableRow>TableLayout>

AddItem.java

package com.lq.auction;import android.app.Fragment;public class AddItem extends FragmentActivity{    @Override    public Fragment getFragment() {        return new AddItemFragment();    }}

add_item.xml

<?xml version="1.0" encoding="utf-8"?><TableLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:stretchColumns="1">    <TextView             android:text="@string/add_item_title"            android:gravity="center"            android:textSize="@dimen/label_font_size"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:padding="@dimen/title_padding"/>            <TableRow>        <TextView             android:text="@string/item_name"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <EditText             android:id="@+id/itemName"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:inputType="text"/>    TableRow>        <TableRow>        <TextView             android:text="@string/item_desc"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <EditText             android:id="@+id/itemDesc"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:inputType="text"/>           TableRow>        <TableRow>        <TextView             android:text="@string/remark"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <EditText             android:id="@+id/itemRemark"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:inputType="text"/>           TableRow>        <TableRow>        <TextView             android:text="@string/init_price"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <EditText             android:id="@+id/initPrice"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:inputType="numberDecimal"/>        TableRow>        <TableRow>        <TextView             android:text="@string/avail_time"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <Spinner             android:id="@+id/availTime"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:entries="@array/availTime"/>         TableRow>        <TableRow>        <TextView             android:text="@string/item_kind"            android:textSize="@dimen/label_font_size"            android:layout_width="wrap_content"            android:layout_height="wrap_content"/>        <Spinner             android:id="@+id/itemKind"            android:layout_width="match_parent"            android:layout_height="wrap_content"/>          TableRow>        <LinearLayout         android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center">        <Button             android:id="@+id/bnAdd"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/add"/>        <Button             android:id="@+id/bnCancel"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/cancel"/>    LinearLayout>TableLayout>

AddItemFragment.java

package com.lq.auction;public class cextends Fragment {    // 定义界面中文本框    EditText itemName, itemDesc, itemRemark, initPrice;    Spinner itemKind, availTime;    // 定义界面中两个按钮    Button bnAdd, bnCancel;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {        View rootView = inflater.inflate(R.layout.add_item, container, false);        // 获取界面中的编辑框        itemName = (EditText) rootView.findViewById(R.id.itemName);        itemDesc = (EditText) rootView.findViewById(R.id.itemDesc);        itemRemark = (EditText) rootView.findViewById(R.id.itemRemark);        initPrice = (EditText) rootView.findViewById(R.id.initPrice);        itemKind = (Spinner) rootView.findViewById(R.id.itemKind);        availTime = (Spinner) rootView.findViewById(R.id.availTime);        //定义发送请求的URL        String url = HttpUtil.BASE_URL + "viewKind.jsp";         JSONArray jsonArray = null;        try {            //获取系统中所有的物品种类            //向指定的URL发送请求，并把服务器响应转换成JSONArray对象            jsonArray = new JSONArray(HttpUtil.getRequest(url));                    } catch (Exception e1) {            e1.printStackTrace();        }        JSONArrayAdapter adapter = new JSONArrayAdapter(getActivity()                , jsonArray, "kindName", false);  //注意大小写，之前把"kindName"写成了"kindname",导致物品种类显示不出来        itemKind.setAdapter(adapter);        // 获取界面中的两个按钮        bnAdd = (Button) rootView.findViewById(R.id.bnAdd);        bnCancel = (Button) rootView.findViewById(R.id.bnCancel);        // 为取消按钮的单击事件绑定事件监听器        bnCancel.setOnClickListener(new HomeListener(getActivity()));        bnAdd.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                if(validate()){                    // 输入校验                    String name = itemName.getText().toString();                    String desc = itemDesc.getText().toString();                    String remark = itemRemark.getText().toString();                    String price = initPrice.getText().toString();                    JSONObject kind = (JSONObject) itemKind.getSelectedItem();                    int avail = availTime.getSelectedItemPosition();                    //根据用户选择有效时间选项，指定实际的有效时间                    switch (avail) {                    case 5:                        avail = 7;                        break;                    case 6:                        avail = 30;                        break;                    default:                        avail +=1;                        break;                    }                    try {                        // 添加物品                        String result = addItem(name, desc                                , remark, price, kind.getInt("id"), avail);                        // 使用对话框来显示添加结果                        DialogUtil.showDialog(getActivity(), result, true);                    } catch (Exception e) {                        DialogUtil.showDialog(getActivity()                                , "服务器响应异常，请稍后再试", false);                        e.printStackTrace();                    }                }            }        });        return rootView;    }    // 对用户输入的种类名称进行校验    private boolean validate() {        String name = itemName.getText().toString().trim();        if(name.equals("")){            DialogUtil.showDialog(getActivity(), "物品名称是必填项", false);            return false;        }        String price = initPrice.getText().toString().trim();        if (price.equals("")) {            DialogUtil.showDialog(getActivity(), "起拍价格是必填项", false);            return false;               }        try {            //尝试把起拍价格转换为浮点数            Double.parseDouble(price);        } catch (NumberFormatException e) {            DialogUtil.showDialog(getActivity(), "起拍价格是必填是数值", false);            return false;        }        return true;    }    private String addItem(String name, String desc            , String remark, String initPrice, int kindId, int availTime)                    throws Exception{        // 使用Map封装请求参数        Map map = new HashMap();        map.put("itemName", name);        map.put("itemDesc", desc);        map.put("itemRemark", remark);        map.put("initPrice", initPrice);        map.put("kindId", kindId + "");        map.put("availTime", availTime+ "");        // 定义发送请求的URL        String url = HttpUtil.BASE_URL + "addItem.jsp";        // 发送请求        return HttpUtil.postReuest(url, map);    }}

运行效果图：

更多相关文章

随机推荐