Android应用集成支付宝接口的简化

拿到支付宝接口的andriod demo后有点无语，集成一个支付服务而已，要在十几个java类之间引用来引用去，这样不仅容易导致应用本身代码结构的复杂化，调试起来也很累，于是操刀改造之：

该删的删，该改写的改写，MobileSecurePayer之外的内容全部整合到MobileSecurePayerHelper之中。

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/*

* Copyright (C) 2010 The MobileSecurePay Project

* All right reserved.

* author: [e-mail]

*modify: fangle

*/

package com.alipay.android;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import java.security.KeyFactory;

import java.security.PrivateKey;

import java.security.PublicKey;

import java.security.Signature;

import java.security.spec.PKCS8EncodedKeySpec;

import java.security.spec.X509EncodedKeySpec;

import java.util.ArrayList;

import java.util.List;

import javax.crypto.Cipher;

import org.apache.http.client.entity.UrlEncodedFormEntity;

import org.apache.http.message.BasicNameValuePair;

import org.json.JSONException;

import org.json.JSONObject;

import android.content.Context;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.net.Uri;

import android.os.Handler;

import android.os.Message;

import android.util.Base64;

public class MobileSecurePayHelper {

staticfinal String TAG = "MobileSecurePayHelper";

publicstatic final String PARTNER = "";

publicstatic final String SELLER = "";

publicstatic final String RSA_PRIVATE = "";

publicstatic final String RSA_ALIPAY_PUBLIC = "";

Context mContext =null;

Handler mHandler =null;

String mUrl =null;

String mPath =null;

publicstatic String Stream2String(InputStream is) {

BufferedReader reader =new BufferedReader(newInputStreamReader(is));

StringBuilder sb =new StringBuilder();

String line =null;

try{

while((line = reader.readLine()) != null)

sb.append(line);

is.close();

}catch (IOException e) {

e.printStackTrace();

}

returnsb.toString();

}

publicstatic JSONObject string2JSON(String str, String split) {

JSONObject json =new JSONObject();

try{

String[] arrStr = str.split(split);

for(int i = 0; i < arrStr.length; i++) {

String[] arrKeyValue = arrStr[i].split("=");

json.put(arrKeyValue[0],

arrStr[i].substring(arrKeyValue[0].length() +1));

}

}catch (Exception e) {

e.printStackTrace();

}

returnjson;

}

publicstatic String SendAndWaitResponse(String strReqData, String strUrl) {

String strResponse =null;

ArrayList<BasicNameValuePair> pairs =new ArrayList<BasicNameValuePair>();

pairs.add(newBasicNameValuePair("requestData", strReqData));

HttpURLConnection conn =null;

UrlEncodedFormEntity p_entity;

try{

p_entity =new UrlEncodedFormEntity(pairs,"utf-8");

URL url =new URL(strUrl);

conn = (HttpURLConnection) url.openConnection();

conn.setConnectTimeout(30* 1000);

conn.setReadTimeout(30* 1000);

conn.setDoOutput(true);

conn.addRequestProperty("Content-type",

"application/x-www-form-urlencoded;charset=utf-8");

conn.connect();

OutputStream os = conn.getOutputStream();

p_entity.writeTo(os);

os.flush();

InputStream content = conn.getInputStream();

strResponse = Stream2String(content);

}catch (IOException e) {

e.printStackTrace();

}finally {

conn.disconnect();

}

returnstrResponse;

}

publicstatic booleanurlDownloadToFile(Context context, String strurl,

String path) {

booleanbRet = false;

try{

URL url =new URL(strurl);

HttpURLConnection conn =null;

conn = (HttpURLConnection) url.openConnection();

conn.setConnectTimeout(30* 1000);

conn.setReadTimeout(30* 1000);

conn.setDoInput(true);

conn.connect();

InputStream is = conn.getInputStream();

File file =new File(path);

file.createNewFile();

FileOutputStream fos =new FileOutputStream(file);

byte[] temp =new byte[1024];

inti = 0;

while((i = is.read(temp)) > 0)

fos.write(temp,0, i);

fos.close();

is.close();

bRet =true;

}catch (IOException e) {

e.printStackTrace();

}

returnbRet;

}

publicstatic String RsaEncode(String content, String key) {

try{

X509EncodedKeySpec x509 =new X509EncodedKeySpec(Base64.decode(key,

Base64.DEFAULT));

KeyFactory kf = KeyFactory.getInstance("RSA");

PublicKey pubKey = kf.generatePublic(x509);

Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");

cipher.init(Cipher.ENCRYPT_MODE, pubKey);

byteplaintext[] = content.getBytes("UTF-8");

byte[] output = cipher.doFinal(plaintext);

returnnew String(Base64.encode(output, Base64.DEFAULT));

}catch (Exception e) {

e.printStackTrace();

}

returnnull;

}

publicstatic String RsaSign(String content, String privateKey) {

try{

PKCS8EncodedKeySpec pkcs8 =new PKCS8EncodedKeySpec(Base64.decode(

privateKey, Base64.DEFAULT));

KeyFactory kf = KeyFactory.getInstance("RSA");

PrivateKey priKey = kf.generatePrivate(pkcs8);

Signature signature = Signature.getInstance("SHA1WithRSA");

signature.initSign(priKey);

signature.update(content.getBytes("utf-8"));

byte[] signed = signature.sign();

returnnew String(Base64.encode(signed, Base64.DEFAULT));

}catch (Exception e) {

e.printStackTrace();

}

returnnull;

}

publicstatic booleanRsaCheck(String content, String sign, String publicKey) {

try{

KeyFactory keyFactory = KeyFactory.getInstance("RSA");

byte[] encodedKey = Base64.decode(publicKey, Base64.DEFAULT);

PublicKey pubKey = keyFactory

.generatePublic(newX509EncodedKeySpec(encodedKey));

Signature signature = Signature.getInstance("SHA1WithRSA");

signature.initVerify(pubKey);

signature.update(content.getBytes("utf-8"));

booleanbverify = signature.verify(Base64.decode(sign,

Base64.DEFAULT));

returnbverify;

}catch (Exception e) {

e.printStackTrace();

}

returnfalse;

}

publicMobileSecurePayHelper(Context context, Handler handler) {

mContext = context;

mHandler = handler;

}

publicboolean detectService() {

booleanisExist = false;

List<PackageInfo> pkgList = mContext.getPackageManager()

.getInstalledPackages(0);

for(int i = 0; i < pkgList.size(); i++) {

if(pkgList.get(i).packageName

.equalsIgnoreCase("com.alipay.android.app"))

isExist =true;

}

returnisExist;

}

publicvoid downloadAliMSP() {

JSONObject Resp =null;

try{

JSONObject req =new JSONObject();

req.put("action","update");

JSONObject data =new JSONObject();

data.put("platform","android");

data.put("version","2.2.3");

data.put("partner","");

req.put("data", data);

Resp =new JSONObject(SendAndWaitResponse(req.toString(),

"https://msp.alipay.com/x.htm"));

mUrl = Resp.getString("updateUrl");

}catch (JSONException e) {

e.printStackTrace();

return;

}

newThread(new Runnable() {

publicvoid run() {

mPath = mContext.getCacheDir().getAbsolutePath() +"/temp.apk";

urlDownloadToFile(mContext, mUrl, mPath);

Message msg =new Message();

msg.what =2;

mHandler.sendMessage(msg);

}

}).start();

}

publicvoid installAliMSP() {

if(mPath == null)

return;

try{

Runtime.getRuntime().exec("chmod 777 "+ mPath);

}catch (IOException e) {

e.printStackTrace();

}

Intent intent =new Intent(Intent.ACTION_VIEW);

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent.setDataAndType(Uri.parse("file://"+ mPath),

"application/vnd.android.package-archive");

mContext.startActivity(intent);

}

}

集成很简单，一个OnClickListener负责调用支付服务，一个Handler负责处理支付过程中的相应事件：

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private Handler m_mspHandler = new Handler() {

publicvoid handleMessage(Message m) {

// 1:支付返回

// 2:支付组件下载完成

TextView tv = (TextView) findViewById(R.id.order_tips);

Button bt = (Button) findViewById(R.id.order_ok);

ProgressBar pb = (ProgressBar) findViewById(R.id.order_wait);

switch(m.what) {

case1:

String ret = (String) m.obj;

String memo ="memo={";

intstart = ret.indexOf(memo) + memo.length();

intend = ret.indexOf("};result=");

memo = ret.substring(start, end);

m_tips += memo;

if(memo.indexOf("付款成功") >=0)

m_tips +="\r\n请注意查看短信，您将收到二维码凭证";

tv.setText(m_tips);

bt.setVisibility(0);

pb.setVisibility(4);

break;

case2:

m_tips +="安全支付组件下载完成,开始安装...\r\n";

tv.setText(m_tips);

m_mspHelper.installAliMSP();

bt.setVisibility(0);

pb.setVisibility(4);

break;

}

}

};

privateOnClickListener m_orderButtonListener = newOnClickListener() {

publicvoid onClick(View v) {

String mobile = m_mobileEdt.getText().toString();

m_tips ="";

TextView tv = (TextView) findViewById(R.id.order_tips);

Button bt = (Button) findViewById(R.id.order_ok);

ProgressBar pb = (ProgressBar) findViewById(R.id.order_wait);

if(mobile.length() != 11) {

m_tips +="无效的收货号码\r\n";

tv.setText(m_tips);

return;

}

if(!m_date.after(m_today)) {

m_tips +="订货日期不能早于明天\r\n";

tv.setText(m_tips);

return;

}

SoapObject request =new SoapObject("http://airtimes.cn/",

"MakeOrder");

request.addProperty("Uname", m_intent.getStringExtra("userid"));

request.addProperty("ProductId",

m_intent.getStringExtra("item_PID"));

request.addProperty("Sum","1");

request.addProperty("PayAmount",

m_intent.getStringExtra("item_price"));

request.addProperty("SMSMobile", mobile);

request.addProperty(

"ExpireDate",

String.format("%04d-%02d-%02d", m_date.get(1),

m_date.get(2) +1, m_date.get(5)));

// 显示等待条，提交订单信息

m_tips +="正在创建订单，请稍候...\r\n";

tv.setText(m_tips);

bt.setVisibility(4);

pb.setVisibility(0);

HttpTransportSE httpTransport =new HttpTransportSE(

"http://www.android-study.com/serv.asmx");

SoapSerializationEnvelope envelope =new SoapSerializationEnvelope(

SoapEnvelope.VER11);

envelope.dotNet =true;

envelope.bodyOut = request;

String respond;

try{

httpTransport.call(request.getNamespace() + request.getName(),

envelope);

if(envelope.getResponse() != null)

respond = envelope.getResponse().toString();

else

respond ="false,null";

}catch (Exception ex) {

respond ="false," + ex.getMessage();

}

if(respond.substring(0,5).equals("false")) {

m_tips +="创建订单失败：" + respond.substring(6) +"\r\n";

tv.setText(m_tips);

bt.setVisibility(0);

pb.setVisibility(4);

return;

}

String msgs[] = respond.split("[,]");

String order;

m_tips +="创建订单成功，开始支付...\r\n";

tv.setText(m_tips);

if(!m_mspHelper.detectService()) {

m_tips +="未安装安全支付组件，开始下载...\r\n";

tv.setText(m_tips);

m_mspHelper.downloadAliMSP();

return;

}

order = String.format("partner=\"%s\"",

MobileSecurePayHelper.PARTNER);

order += String.format("&seller=\"%s\"",

MobileSecurePayHelper.SELLER);

order += String.format("&out_trade_no=\"%s\"", msgs[1]);

order += String.format("&subject=\"%s\"",

m_intent.getStringExtra("item_type"));

order += String.format("&body=\"%s\"",

m_intent.getStringExtra("item_name"));

order += String.format("&total_fee=\"%s\"",

m_intent.getStringExtra("item_price"));

order += String.format("¬ify_url=\"%s\"",

"http://www.android-study.com/alipay.aspx");

String sign = URLEncoder.encode(MobileSecurePayHelper.RsaSign(

order, MobileSecurePayHelper.RSA_PRIVATE));

order += String.format("&sign=\"%s\"", sign);

order += String.format("&sign_type=\"%s\"","RSA");

com.alipay.android.MobileSecurePayer msp =new com.alipay.android.MobileSecurePayer();

if(!msp.pay(order, m_mspHandler, 1, OrderingActivity.this)) {

m_tips +="调用安全支付功能失败\r\n";

tv.setText(m_tips);

bt.setVisibility(0);

pb.setVisibility(4);

return;

}

}

};