手指上的Android之实战篇(六)_Android

指尖上的Android之实战篇(六)

本来准备周末看NBA，可是这两天都没比赛，要到礼拜一，悲吹的上班族

最近来感觉进步缓慢，难道是天气越来越热的缘故，开玩笑了，今天冒雨来公司加班，接着完善这个的项目的其他的功能模块。

今天说的模块是：查看流拍的物品—(各位童鞋的可以参照李刚的书19章的项目，往大家拍砖)

它对应的Servlet是ViewFailServlet，返回的数据为：

JSON数据，类似如下：

[{"id":3,"endtime":"2012-03-28","initPrice":21000,"addtime":"2012-03-21","itemName":"The old house","bids":[],"maxPrice":25000,"itemRemark":"Old house","itemDesc":"40 years old house","kind":"house property"}]

1. 查看流拍的物品的程序界面：view_item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical"  android:gravity="center"    android:background="@drawable/bg"  android:layout_width="fill_parent"  android:layout_height="fill_parent">  <LinearLayout  android:orientation="horizontal"  android:gravity="center"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_margin="@dimen/sub_title_margin"  >  	<TextView  	android:id="@+id/view_title"  	android:text="@string/view_succ"  	android:textSize="@dimen/label_font_size"  	android:textColor="@color/white"   	android:layout_width="wrap_content"  	android:layout_height="wrap_content"  	/>  	<!-- 定义返回按钮 -->  	<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/succList"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  /></LinearLayout>

2.查看流拍物品的Activity：ViewItem.java

package com.infy.auction.client;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import com.infy.auction.client.util.DialogUtil;import com.infy.auction.client.util.HttpUtil;import com.infy.auction.client.util.JSONArrayAdapter;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.AdapterView;import android.widget.Button;import android.widget.EditText;import android.widget.ListView;import android.widget.TextView;import android.widget.AdapterView.OnItemClickListener;public class ViewItem extends Activity{	Button bnHome;	ListView succList;	TextView viewTitle;	private static final String TAG="ViewItem";	@Override	protected void onCreate(Bundle savedInstanceState) {				// TODO Auto-generated method stub		super.onCreate(savedInstanceState);		setContentView(R.layout.view_item);		//获取界面上的组件		bnHome = (Button)findViewById(R.id.bn_home);		succList = (ListView)findViewById(R.id.succList);		viewTitle =(TextView) findViewById(R.id.view_title);			//为返回按钮绑定事件监听器		bnHome.setOnClickListener(new FinishListener(this));				String action = getIntent().getStringExtra("action");		//定义发送的URL		String url = HttpUtil.BASE_URL+action;				if(action.equals("ViewFailServlet")){			viewTitle.setText(R.string.view_fial);		}				try{			//向指定URL发送请求，并把服务器响应转化成JSONArry对象			JSONArray jsonArray = new JSONArray(HttpUtil.getRequest(url));						//将JSONArray包装成Adapter			JSONArrayAdapter jsonAdapter = new JSONArrayAdapter(ViewItem.this, jsonArray, "itemName", true);						succList.setAdapter(jsonAdapter);					}catch(Exception e){			DialogUtil.showDialog(this, "服务器响应异常，请稍后再试！",false);			e.printStackTrace();		}				succList.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView<?> parent, View view, int position,					long id) {				// TODO Auto-generated method stub				//查看指定的物品				viewItemDetail(position);							}		});			}		//查看指定的物品	private void viewItemDetail(int postiton){		//加载detail.xml界面布局代表视图		View detailView = getLayoutInflater().inflate(R.layout.detail, null);		//获取detail.xml界面布局文件中的文本框		EditText itemName= (EditText)detailView.findViewById(R.id.itemName);						EditText itemKind = (EditText)detailView.findViewById(R.id.itemKind);		EditText maxPrice = (EditText)detailView.findViewById(R.id.maxPrice);		EditText itemRemark =(EditText)detailView.findViewById(R.id.itemRemark);				//获取被单击的列表项		JSONObject jsonObject = (JSONObject)succList.getAdapter().getItem(postiton);				try{			//通过文本显示物品详情			Log.i(TAG, "itemKind--01>"+jsonObject.getString("itemName"));			Log.i(TAG, "itemKind--02>"+jsonObject.getDouble("maxPrice")+"");			Log.i(TAG, "itemKind--03>"+jsonObject.getString("itemDesc"));			itemName.setText(jsonObject.getString("itemName"));			itemKind.setText(jsonObject.getString("kind"));//			Log.i(TAG, "itemKind--01>"+jsonObject.getString("kind"));			maxPrice.setText(jsonObject.getDouble("maxPrice")+"");			itemRemark.setText(jsonObject.getString("itemDesc"));					}catch(JSONException e){			e.printStackTrace();		}		DialogUtil.showDialog(ViewItem.this, detailView);	}}

3.这里上面用到了把一个JSON对象，转化成数组来处理，在对JSON数组进行包装，作为ListView的内容的Adapter的工具类：JSONArrayAdapter.java

package com.infy.auction.client.util;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import com.infy.auction.client.R;import android.content.Context;import android.graphics.Color;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;public class JSONArrayAdapter extends BaseAdapter{	private Context ctx;	//定义需要包装的JSONArray对象	private JSONArray jsonArray;	//定义列表显示JSONOBject对象的那个属性	private String property;	private boolean hasIcon;		public JSONArrayAdapter(Context ctx,JSONArray jsonArray,String property,boolean hasIcon) {		// TODO Auto-generated constructor stub	  this.ctx = ctx;	  this.jsonArray = jsonArray;	  this.property = property;	  this.hasIcon  = hasIcon;		}	@Override	public int getCount() {		// TODO Auto-generated method stub		return jsonArray.length();	}	@Override	public Object getItem(int position) {		// TODO Auto-generated method stub		return jsonArray.optJSONObject(position);	}	@Override	public long getItemId(int position) {		// TODO Auto-generated method stub			try{						return ((JSONObject)getItem(position)).getInt("id");		}catch(JSONException e){			e.printStackTrace();		}		return 0;	}	@Override	public View getView(int position, View convertView, ViewGroup parent) {		// TODO Auto-generated method stub				//定义一个线性布局管理器		LinearLayout linear = new LinearLayout(ctx);		//设置为水平的线性布局管理器		linear.setOrientation(0);		//创建一个ImageView		ImageView iv = new ImageView(ctx);		iv.setPadding(10, 0, 20, 0);		iv.setImageResource(R.drawable.item);		//将图片添加到LinearLayout中		linear.addView(iv);		//创建一个TextView		TextView tv = new TextView(ctx);				try{				//获取JSONArray数组元素的property属性				String itemName = ((JSONObject)getItem(position)).getString(property);				//设置显示的Textview所显示的内容				tv.setText(itemName);								}catch(JSONException e){			e.printStackTrace();		}				tv.setTextSize(20);				if(hasIcon){			//将TextView添加到LinearLayout			linear.addView(tv);			return linear;		}else{			tv.setTextColor(Color.BLACK);			return tv;		}	}	}

最后查看流拍物品的记录的效果图如下：