自己写的一个在线汇率转换工具-MoneyDroid sources

已经把更新的项目SVN到SF上了，地址: 复制我

先main.xml:

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<Spinner android:layout_height="wrap_content" android:id="@+id/Spinner01" android:layout_width="wrap_content" android:layout_x="16dip" android:layout_y="13dip"></Spinner>
<Spinner android:layout_height="wrap_content" android:id="@+id/Spinner02" android:layout_width="wrap_content" android:layout_x="133dip" android:layout_y="14dip"></Spinner>
<EditText android:layout_height="wrap_content" android:layout_width="170px" android:text="" android:textSize="18sp" android:id="@+id/EditText01" android:layout_x="13dip" android:layout_y="101dip"></EditText>
<Button android:layout_height="wrap_content" android:text="转换" android:layout_width="wrap_content" android:id="@+id/Button01" android:layout_x="240dip" android:layout_y="98dip"></Button>
<TextView android:layout_height="wrap_content" android:layout_width="wrap_content" android:id="@+id/TextView01" android:layout_x="113dip" android:layout_y="220dip"></TextView>
</AbsoluteLayout>

然后sources:

package com.overflow.moneydroid;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.TextView;
public class Activity01 extends Activity {
	private final String DEBUG_TAG = "MoneyDroid";
	
	private static final String[] moneyName = {"CNY",
		"HKD","TWD","EUR","USD","GBP","AUD","KRW","JPY"};
	
	private TextView textview = null;
	private Button button = null;
	private Spinner spinner1 = null;
	private Spinner spinner2 = null;
	private EditText edittext = null;
	
	static String sp1 = "";
	static String sp2 = "";
	static String edt = "";
    
	private ArrayAdapter<String> adapter;
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        textview = (TextView) this.findViewById(R.id.TextView01);
        button = (Button) this.findViewById(R.id.Button01);
        spinner1 = (Spinner) this.findViewById(R.id.Spinner01);
        spinner2 = (Spinner) this.findViewById(R.id.Spinner02);
        edittext = (EditText) this.findViewById(R.id.EditText01);
        
        
        
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,moneyName);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner1.setAdapter(adapter);
        spinner2.setAdapter(adapter);
        
        spinner1.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
			public void onItemSelected(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				// TODO Auto-generated method stub
				sp1 = moneyName[arg2];
				Log.e(DEBUG_TAG, sp1);
				arg0.setVisibility(View.VISIBLE);
			}
			public void onNothingSelected(AdapterView<?> arg0) {
				// TODO Auto-generated method stub
				
			}
        	
        });
        
        spinner2.setOnItemSelectedListener(new Spinner.OnItemSelectedListener() {
			public void onItemSelected(AdapterView<?> arg0, View arg1,
					int arg2, long arg3) {
				// TODO Auto-generated method stub
				sp2 = moneyName[arg2];
				Log.e(DEBUG_TAG, sp2);
				arg0.setVisibility(View.VISIBLE);
			}
			public void onNothingSelected(AdapterView<?> arg0) {
				// TODO Auto-generated method stub
				
			}
        	
        });
        
        
        
        button.setOnClickListener(new Button.OnClickListener() {
        	
        	
			public void onClick(View v) {
				// TODO Auto-generated method stub
				//textview.setText("ok");
				String httpUrl = "http://www.123cha.com/hl/?q="+edittext.getText().toString()+
				"&from="+sp1+"&to="+sp2+"&s="+
				sp1+sp2+"#symbol="+sp1+sp2+"=X;range=3m;";
				//构造一个URL对象
				String resultData = "";
	    		URL url = null;
				try
				{
					
					url = new URL(httpUrl); 
				}
				catch (MalformedURLException e)
				{
					Log.e(DEBUG_TAG, "MalformedURLException");
				}
				if (url != null)
				{
					try
					{
						// 使用HttpURLConnection打开连接
						HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
						//得到读取的内容(流)
						InputStreamReader in = new InputStreamReader(urlConn.getInputStream());
						// 为输出创建BufferedReader
						BufferedReader buffer = new BufferedReader(in);
						String inputLine = null;
						String matcherLine = null;
						//使用循环来读取获得的数据
						Pattern pattern = Pattern.compile("<td>(.+?)</td><td>(.+?)</td><td>(.+?)</td>",Pattern.DOTALL);
						while (((inputLine = buffer.readLine()) != null))
						{
							//我们在每一行后面加上一个"\n"来换行
							
							resultData += inputLine + "\n";
							Matcher matcher = pattern.matcher(resultData);
							if (matcher.find()) {
								Log.e(DEBUG_TAG, matcher.group());
								
								matcherLine = matcher.group(3).trim();
							}
							
						}		  
						//关闭InputStreamReader
						//Log.e(DEBUG_TAG,httpUrl);
						in.close();
						//关闭http连接
						urlConn.disconnect();
						//设置显示取得的内容
						if ( matcherLine != null )
						{
							
							textview.setText(matcherLine);
						}
						else 
						{
							textview.setText("读取的内容为NULL");
						}
					}
					catch (IOException e)
					{
						Log.e(DEBUG_TAG, "IOException");
					}
				}
				else
				{
					Log.e(DEBUG_TAG, "Url NULL");
				}
			}
        	
        });
        
    }
}

要在manifest.xml里加入网络权限，东西写的太简陋，正则很慢，很费流量，更好的办法应该是更新汇率到本地数据库，然后本地来计算汇率。