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。

[代码]java代码：

001/*

002 * Copyright (C) 2010 The MobileSecurePay Project

003 * All right reserved.

004 * author: [e-mail]

005  

006 *modify: fangle

007 */

008  

009package com.alipay.android;

010  

011import java.io.BufferedReader;

012import java.io.File;

013import java.io.FileOutputStream;

014import java.io.IOException;

015import java.io.InputStream;

016import java.io.InputStreamReader;

017import java.io.OutputStream;

018import java.net.HttpURLConnection;

019import java.net.URL;

020import java.security.KeyFactory;

021import java.security.PrivateKey;

022import java.security.PublicKey;

023import java.security.Signature;

024import java.security.spec.PKCS8EncodedKeySpec;

025import java.security.spec.X509EncodedKeySpec;

026import java.util.ArrayList;

027import java.util.List;

028  

029import javax.crypto.Cipher;

030  

031import org.apache.http.client.entity.UrlEncodedFormEntity;

032import org.apache.http.message.BasicNameValuePair;

033import org.json.JSONException;

034import org.json.JSONObject;

035  

036import android.content.Context;

037import android.content.Intent;

038import android.content.pm.PackageInfo;

039import android.net.Uri;

040import android.os.Handler;

041import android.os.Message;

042import android.util.Base64;

043  

044public classMobileSecurePayHelper {

045    staticfinal String TAG = "MobileSecurePayHelper";

046  

047    publicstatic final String PARTNER = "";

048    publicstatic final String SELLER = "";

049    publicstatic final String RSA_PRIVATE = "";

050    publicstatic final String RSA_ALIPAY_PUBLIC = "";

051  

052    Context mContext =null;

053    Handler mHandler =null;

054    String mUrl =null;

055    String mPath =null;

056  

057    publicstatic String Stream2String(InputStream is) {

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

059        StringBuilder sb =new StringBuilder();

060        String line =null;

061        try{

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

063                sb.append(line);

064            is.close();

065        } catch (IOException e) {

066            e.printStackTrace();

067        }

068        returnsb.toString();

069    }

070  

071    publicstatic JSONObject string2JSON(String str, String split) {

072        JSONObject json =new JSONObject();

073        try{

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

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

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

077                json.put(arrKeyValue[0],

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

079            }

080        } catch (Exception e) {

081            e.printStackTrace();

082        }

083        returnjson;

084    }

085  

086    publicstatic String SendAndWaitResponse(String strReqData, String strUrl) {

087        String strResponse =null;

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

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

090  

091        HttpURLConnection conn =null;

092        UrlEncodedFormEntity p_entity;

093        try{

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

095            URL url =new URL(strUrl);

096            conn = (HttpURLConnection) url.openConnection();

097            conn.setConnectTimeout(30* 1000);

098            conn.setReadTimeout(30* 1000);

099            conn.setDoOutput(true);

100            conn.addRequestProperty("Content-type",

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

102            conn.connect();

103  

104            OutputStream os = conn.getOutputStream();

105            p_entity.writeTo(os);

106            os.flush();

107            InputStream content = conn.getInputStream();

108            strResponse = Stream2String(content);

109        } catch (IOException e) {

110            e.printStackTrace();

111        } finally {

112            conn.disconnect();

113        }

114        returnstrResponse;

115    }

116  

117    publicstatic boolean urlDownloadToFile(Context context, String strurl,

118            String path) {

119        booleanbRet = false;

120        try{

121            URL url =new URL(strurl);

122            HttpURLConnection conn =null;

123            conn = (HttpURLConnection) url.openConnection();

124            conn.setConnectTimeout(30* 1000);

125            conn.setReadTimeout(30* 1000);

126            conn.setDoInput(true);

127            conn.connect();

128            InputStream is = conn.getInputStream();

129            File file =new File(path);

130            file.createNewFile();

131            FileOutputStream fos =new FileOutputStream(file);

132            byte[] temp =new byte[1024];

133            inti = 0;

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

135                fos.write(temp,0, i);

136            fos.close();

137            is.close();

138            bRet =true;

139        } catch (IOException e) {

140            e.printStackTrace();

141        }

142        returnbRet;

143    }

144  

145    publicstatic String RsaEncode(String content, String key) {

146        try{

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

148                    Base64.DEFAULT));

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

150            PublicKey pubKey = kf.generatePublic(x509);

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

152            cipher.init(Cipher.ENCRYPT_MODE, pubKey);

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

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

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

156        } catch (Exception e) {

157            e.printStackTrace();

158        }

159        returnnull;

160    }

161  

162    publicstatic String RsaSign(String content, String privateKey) {

163        try{

164            PKCS8EncodedKeySpec pkcs8 =new PKCS8EncodedKeySpec(Base64.decode(

165                    privateKey, Base64.DEFAULT));

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

167            PrivateKey priKey = kf.generatePrivate(pkcs8);

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

169            signature.initSign(priKey);

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

171            byte[] signed = signature.sign();

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

173        } catch (Exception e) {

174            e.printStackTrace();

175        }

176        returnnull;

177    }

178  

179    publicstatic boolean RsaCheck(String content, String sign, String publicKey) {

180        try{

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

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

183            PublicKey pubKey = keyFactory

184                    .generatePublic(newX509EncodedKeySpec(encodedKey));

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

186            signature.initVerify(pubKey);

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

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

189                    Base64.DEFAULT));

190            returnbverify;

191        } catch (Exception e) {

192            e.printStackTrace();

193        }

194        returnfalse;

195    }

196  

197    publicMobileSecurePayHelper(Context context, Handler handler) {

198        mContext = context;

199        mHandler = handler;

200    }

201  

202    publicboolean detectService() {

203        booleanisExist = false;

204        List<PackageInfo> pkgList = mContext.getPackageManager()

205                .getInstalledPackages(0);

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

207            if(pkgList.get(i).packageName

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

209                isExist =true;

210        }

211        returnisExist;

212    }

213  

214    publicvoid downloadAliMSP() {

215        JSONObject Resp =null;

216        try{

217            JSONObject req =new JSONObject();

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

219            JSONObject data =new JSONObject();

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

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

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

223            req.put("data", data);

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

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

226            mUrl = Resp.getString("updateUrl");

227        } catch (JSONException e) {

228            e.printStackTrace();

229            return;

230        }

231        newThread(new Runnable() {

232            publicvoid run() {

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

234                urlDownloadToFile(mContext, mUrl, mPath);

235                Message msg =new Message();

236                msg.what =2;

237                mHandler.sendMessage(msg);

238            }

239        }).start();

240    }

241  

242    publicvoid installAliMSP() {

243        if(mPath == null)

244            return;

245        try{

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

247        } catch (IOException e) {

248            e.printStackTrace();

249        }

250        Intent intent =new Intent(Intent.ACTION_VIEW);

251        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

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

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

254        mContext.startActivity(intent);

255    }

256}

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：

[代码]java代码：

view sourceprint?

001private Handler m_mspHandler =new Handler() {

002    publicvoid handleMessage(Message m) {

003        // 1:支付返回

004        // 2:支付组件下载完成

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

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

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

008        switch(m.what) {

009        case1:

010            String ret = (String) m.obj;

011            String memo ="memo={";

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

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

014            memo = ret.substring(start, end);

015            m_tips += memo;

016            if(memo.indexOf("付款成功") >=0)

017                m_tips +="\r\n请注意查看短信，您将收到二维码凭证";

018            tv.setText(m_tips);

019            bt.setVisibility(0);

020            pb.setVisibility(4);

021            break;

022        case2:

023            m_tips +="安全支付组件下载完成,开始安装...\r\n";

024            tv.setText(m_tips);

025            m_mspHelper.installAliMSP();

026            bt.setVisibility(0);

027            pb.setVisibility(4);

028            break;

029        }

030    }

031};

032  

033private OnClickListener m_orderButtonListener =new OnClickListener() {

034    publicvoid onClick(View v) {

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

036        m_tips ="";

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

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

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

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

041            m_tips +="无效的收货号码\r\n";

042            tv.setText(m_tips);

043            return;

044        }

045        if(!m_date.after(m_today)) {

046            m_tips +="订货日期不能早于明天\r\n";

047            tv.setText(m_tips);

048            return;

049        }

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

051                "MakeOrder");

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

053        request.addProperty("ProductId",

054                m_intent.getStringExtra("item_PID"));

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

056        request.addProperty("PayAmount",

057                m_intent.getStringExtra("item_price"));

058        request.addProperty("SMSMobile", mobile);

059        request.addProperty(

060                "ExpireDate",

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

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

063  

064        // 显示等待条，提交订单信息

065        m_tips +="正在创建订单，请稍候...\r\n";

066        tv.setText(m_tips);

067        bt.setVisibility(4);

068        pb.setVisibility(0);

069  

070        HttpTransportSE httpTransport =new HttpTransportSE(

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

072        SoapSerializationEnvelope envelope =new SoapSerializationEnvelope(

073                SoapEnvelope.VER11);

074        envelope.dotNet =true;

075        envelope.bodyOut = request;

076        String respond;

077        try{

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

079                    envelope);

080            if(envelope.getResponse() != null)

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

082            else

083                respond ="false,null";

084        } catch (Exception ex) {

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

086        }

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

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

089            tv.setText(m_tips);

090            bt.setVisibility(0);

091            pb.setVisibility(4);

092            return;

093        }

094  

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

096        String order;

097        m_tips +="创建订单成功，开始支付...\r\n";

098        tv.setText(m_tips);

099  

100        if(!m_mspHelper.detectService()) {

101            m_tips +="未安装安全支付组件，开始下载...\r\n";

102            tv.setText(m_tips);

103            m_mspHelper.downloadAliMSP();

104            return;

105        }

106  

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

108                MobileSecurePayHelper.PARTNER);

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

110                MobileSecurePayHelper.SELLER);

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

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

113                m_intent.getStringExtra("item_type"));

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

115                m_intent.getStringExtra("item_name"));

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

117                m_intent.getStringExtra("item_price"));

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

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

120        String sign = URLEncoder.encode(MobileSecurePayHelper.RsaSign(

121                order, MobileSecurePayHelper.RSA_PRIVATE));

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

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

124  

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

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

127            m_tips +="调用安全支付功能失败\r\n";

128            tv.setText(m_tips);

129            bt.setVisibility(0);

130            pb.setVisibility(4);

131            return;

132        }

133    }

134};