Android支付接入（一）：支付宝

原地址：http://blog.csdn.net/simdanfeg/article/details/9011603

转载之前我想深深地感谢屌丝哥

相信相同过App获取利润的都会需要接入计费SDK，下边就跟大家走一遍完整的支付宝SDK接入，支付系列均通过计费Button触发，计费所有代码均放到一个java文件实现，这样虽然会有点违背java面向对象及封装性，但这样做的一个好处是可以快速集成到不同的游戏中，将改动的文件降到最低，各有利弊吧，如果大家有什么更好的方法，望一起交流，好了，废话不多说了，开始干活。

PS：初次写博文，各方面还不够完善，看到此博文的朋友有什么意见或者建议请回复或者留言，你们的支持是我最大的动力。

注意事项

1.添加android.permission.INTERNET权限和android.permission.ACCESS_NETWORK_STATE权限

2.代码中出现注释的地方重点看，没注释的地方可以不看

3.想获取支付宝合作商户ID，及支付宝公钥请点击支付宝链接，生成密钥及PKCS8转码工具在文档中

代码

MainActivity：

[java] view plaincopy

package com.example.blogforzfb;  

import android.os.Bundle;
import android.view.View;
import android.app.Activity;  

public class MainActivity extends Activity {  

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  findViewById(R.id.button1).setOnClickListener(
    new View.OnClickListener() {
     @Override
     public void onClick(View v) {
      // TODO Auto-generated method stub
      // 拿到Fiap对象并传入容器
      Fiap fiap = new Fiap(MainActivity.this);
      // 调用支付方法，并传入支付金额
      fiap.android_pay(0.01);
     }
    });
 }  

}  

Fiap.java（支付逻辑所在文件）

[java] view plaincopy

package com.example.blogforzfb;  

// 支付宝应用支付
// 2012-09-20 14:41:47
// (c) 2012 Catcap  

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.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.net.URLEncoder;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.ArrayList;
import java.util.List;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONException;
import org.json.JSONObject;
import com.alipay.android.app.IAlixPay;
import com.alipay.android.app.IRemoteServiceCallback;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.util.Log;
import android.view.KeyEvent;
import android.widget.Toast;  

@SuppressLint ("HandlerLeak")
public class Fiap{
    Activity mActivity = null;  

    // ===================================
    // JAVA 的接口
    // ===================================  

    public Fiap(Activity activity){  

    mActivity = activity;  

    }  

    //这里传过来的是想支付多少钱(最好定义成double的，方便调试，毕竟每次测试都支付几元大洋不是每个人都负担的起的)
    public void android_pay (double coin){  

    //支付宝支付必须依赖网络，所以在这里必须加网络判定
        if (!is_can_internet (mActivity)){  

            fiapHandler.sendEmptyMessage(1);
            return;
        }  

        Message msg = new Message ();
        Bundle bundle = new Bundle();
        bundle.putDouble("coin", coin);
        msg.setData(bundle);
        msg.what = 1;
        fss.sendMessage (msg);
    }  

    private Handler fiapHandler = new Handler(){  

    public void handleMessage(Message msg) {
    if (msg.what == 1) {
    new AlertDialog.Builder (mActivity).setTitle ("提示").setMessage ("连接不到网络。").setPositiveButton ("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent = new Intent(
"android.settings.WIFI_SETTINGS");
mActivity.startActivity(intent);
}
}).create ().show ();
}
    };
    };  

    // ===================================
    // 支付宝
    // ===================================
    public class PartnerConfig {  

//以下配置涉及到公司内容，所以略去，需自己配置
        // 合作商户ID。用签约支付宝账号登录ms.alipay.com后，在账户信息页面获取。
        public static final String PARTNER = "";
        // 商户收款的支付宝账号
        public static final String SELLER = "";
        // 商户（RSA）私钥(注意一定要转PKCS8格式，否则在Android4.0及以上系统会支付失败)
        public static final String RSA_PRIVATE = "";
        // 支付宝（RSA）公钥用签约支付宝账号登录ms.alipay.com后，在密钥管理页面获取。
        public static final String RSA_ALIPAY_PUBLIC = "";
    }  

    private ProgressDialog mProgress = null;  

    public static class AlixOnCancelListener implements DialogInterface.OnCancelListener {
        Activity mcontext;  

        AlixOnCancelListener (Activity context){
            mcontext = context;
        }  

        public void onCancel (DialogInterface dialog){
            mcontext.onKeyDown (KeyEvent.KEYCODE_BACK, null);
        }
    }  

    private Handler fss = new Handler (){
        @SuppressWarnings ("deprecation")
        public void handleMessage (Message msg){
            MobileSecurePayHelper mspHelper = new MobileSecurePayHelper (mActivity);
            boolean isMobile_spExist = mspHelper.detectMobile_sp ();
            if (!isMobile_spExist)
                return;
            // 根据订单信息开始进行支付
            try{
                // 准备订单信息
                Bundle bundle = msg.getData();
                double _coin = bundle.getDouble("coin");
                String orderInfo = getOrderInfo(_coin);
                // 这里根据签名方式对订单信息进行签名
                String signType = getSignType ();
                String strsign = sign (signType, orderInfo);
                // 对签名进行编码
                strsign = URLEncoder.encode (strsign);
                // 组装好参数
                String info = orderInfo + "&sign=" + """ + strsign + """ + "&" + getSignType ();
                // 调用pay方法进行支付
                MobileSecurePayer msp = new MobileSecurePayer ();
                boolean bRet = msp.pay (info, mHandler, AlixId.RQF_PAY, mActivity);
                if (bRet){
                    // 显示“正在支付”进度条
                    closeProgress ();
                    mProgress = BaseHelper.showProgress (mActivity, null, "正在支付", false, true);
                }
            } catch (Exception ex){
                ex.printStackTrace ();
            }
        }
    };  

    private Handler mHandler = new Handler (){
        public void handleMessage (Message msg){
            try{
                String strRet = (String) msg.obj;
                switch (msg.what){
                    case AlixId.RQF_PAY:{
                        //
                        closeProgress ();
                        // 处理交易结果
                        try{
                            // 获取交易状态码，具体状态代码请参看文档
                            String tradeStatus = "resultStatus={";
                            int imemoStart = strRet.indexOf ("resultStatus=");
                            imemoStart += tradeStatus.length ();
                            int imemoEnd = strRet.indexOf ("};memo=");
                            tradeStatus = strRet.substring (imemoStart, imemoEnd);
                            //先验签通知
                            ResultChecker resultChecker = new ResultChecker (strRet);
                            int retVal = resultChecker.checkSign ();
                            if (retVal == ResultChecker.RESULT_CHECK_SIGN_FAILED){
                                BaseHelper.showDialog (mActivity, "提示", "您的订单信息已被非法篡改。", android.R.drawable.ic_dialog_alert);
                            } else{
                                if (tradeStatus.equals ("9000")){  

                                    //程序到这里表示支付已经成功了，想干什么就在这里干吧 -v-
                                Toast.makeText(mActivity, "支付成功",Toast.LENGTH_LONG).show();
                                Log.i("result of this pay:", "successful");  

                                } else if (!tradeStatus.equals ("4000")){  

                                //程序到这里表示此次支付失败，查看具体原因可以从这里打印个log
                                Toast.makeText(mActivity, "支付失败,交易状态码为:" + tradeStatus, Toast.LENGTH_LONG).show();
                                Log.e("result of this pay", "falied");
                                }
                            }
                        } catch (Exception e){
                            e.printStackTrace ();
                        }
                    }
                        break;
                }
                super.handleMessage (msg);
            } catch (Exception e){
                e.printStackTrace ();
            }
        }
    };  

    String getSignType (){
        String getSignType = "sign_type=" + """ + "RSA" + """;
        return getSignType;
    }  

    void closeProgress (){
        try{
            if (mProgress != null){
                mProgress.dismiss ();
                mProgress = null;
            }
        } catch (Exception e){
            e.printStackTrace ();
        }
    }  

    String getOrderInfo (double position){  

        String strOrderInfo = "partner=" + """ + PartnerConfig.PARTNER + """;
        strOrderInfo += "&";
        strOrderInfo += "seller=" + """ + PartnerConfig.SELLER + """;
        strOrderInfo += "&";
        strOrderInfo += "out_trade_no=" + """ + get_order_id () + """;
        strOrderInfo += "&";  

        //这里是显示到支付宝支付界面上的付费信息提示（这里一定要严格按照此格式填写）
        strOrderInfo += "subject=" + ""猫币"";
        strOrderInfo += "&";
        strOrderInfo += "body=" + ""购买猫币"";
        strOrderInfo += "&";
        strOrderInfo += "total_fee=" + """ + position + """;
        strOrderInfo += "&";
        strOrderInfo += "notify_url=" + """ + "http://notify.java.jpxx.org/index.jsp" + """;
        return strOrderInfo;
    }  

    String sign (String signType, String content){
        return Rsa.sign (content, PartnerConfig.RSA_PRIVATE);
    }  

    public boolean is_can_internet (final Context context){
        try{
            ConnectivityManager manger = (ConnectivityManager) context.getSystemService (Context.CONNECTIVITY_SERVICE);
            NetworkInfo info = manger.getActiveNetworkInfo ();  

            return (info != null && info.isConnected ());
        } catch (Exception e){  

            return false;
        }
    }  

    public String get_order_id (){
        long ran1 = get_round (1111, 9999);
        long ran2 = get_round (1111, 9999);  

        //注掉的这里是返回的渠道号（我们用的友盟）+随机数和当前系统时间组合
        //return android_get_umeng_channel () + "_" + ran1 + System.currentTimeMillis () + ran2;
        return "_"+ran1 + System.currentTimeMillis () + ran2;
    }  

    public long get_round (int min, int max){
        return Math.round (Math.random () * (max - min) + min);
    }  

     =================================================================================================
    //
    // 支付宝不用动的
    // ==================================================================================================
    public final class AlixId {
        public static final int BASE_ID = 0;
        public static final int RQF_PAY = BASE_ID + 1;
        public static final int RQF_INSTALL_CHECK = RQF_PAY + 1;
    }  

    final class AlixDefine {
        public static final String IMEI = "imei";
        public static final String IMSI = "imsi";
        public static final String KEY = "key";
        public static final String USER_AGENT = "user_agent";
        public static final String VERSION = "version";
        public static final String DEVICE = "device";
        public static final String SID = "sid";
        public static final String partner = "partner";
        public static final String charset = "charset";
        public static final String sign_type = "sign_type";
        public static final String sign = "sign";
        public static final String URL = "URL";
        public static final String split = "&";
        public static final String AlixPay = "AlixPay";
        public static final String action = "action";
        public static final String actionUpdate = "update";
        public static final String data = "data";
        public static final String platform = "platform";
    }  

    public static final class Base64 {
        static private final int BASELENGTH = 128;
        static private final int LOOKUPLENGTH = 64;
        static private final int TWENTYFOURBITGROUP = 24;
        static private final int EIGHTBIT = 8;
        static private final int SIXTEENBIT = 16;
        static private final int FOURBYTE = 4;
        static private final int SIGN = -128;
        static private final char PAD = ‘=‘;
        static private final boolean fDebug = false;
        static final private byte[] base64Alphabet = new byte[BASELENGTH];
        static final private char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];
        static{
            for (int i = 0; i < BASELENGTH; ++i){
                base64Alphabet[i] = -1;
            }
            for (int i = ‘Z‘; i >= ‘A‘; i--){
                base64Alphabet[i] = (byte) (i - ‘A‘);
            }
            for (int i = ‘z‘; i >= ‘a‘; i--){
                base64Alphabet[i] = (byte) (i - ‘a‘ + 26);
            }
            for (int i = ‘9‘; i >= ‘0‘; i--){
                base64Alphabet[i] = (byte) (i - ‘0‘ + 52);
            }
            base64Alphabet[‘+‘] = 62;
            base64Alphabet[‘/‘] = 63;
            for (int i = 0; i <= 25; i++){
                lookUpBase64Alphabet[i] = (char) (‘A‘ + i);
            }
            for (int i = 26, j = 0; i <= 51; i++, j++){
                lookUpBase64Alphabet[i] = (char) (‘a‘ + j);
            }
            for (int i = 52, j = 0; i <= 61; i++, j++){
                lookUpBase64Alphabet[i] = (char) (‘0‘ + j);
            }
            lookUpBase64Alphabet[62] = (char) ‘+‘;
            lookUpBase64Alphabet[63] = (char) ‘/‘;
        }  

        private static boolean isWhiteSpace (char octect){
            return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
        }  

        private static boolean isPad (char octect){
            return (octect == PAD);
        }  

        private static boolean isData (char octect){
            return (octect < BASELENGTH && base64Alphabet[octect] != -1);
        }  

        public static String encode (byte[] binaryData){
            if (binaryData == null){
                return null;
            }
            int lengthDataBits = binaryData.length * EIGHTBIT;
            if (lengthDataBits == 0){
                return "";
            }
            int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
            int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
            int numberQuartet = fewerThan24bits != 0? numberTriplets + 1 : numberTriplets;
            char encodedData[] = null;
            encodedData = new char[numberQuartet * 4];
            byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;
            int encodedIndex = 0;
            int dataIndex = 0;
            if (fDebug){
                System.out.println ("number of triplets = " + numberTriplets);
            }
            for (int i = 0; i < numberTriplets; i++){
                b1 = binaryData[dataIndex++];
                b2 = binaryData[dataIndex++];
                b3 = binaryData[dataIndex++];
                if (fDebug){
                    System.out.println ("b1= " + b1 + ", b2= " + b2 + ", b3= " + b3);
                }
                l = (byte) (b2 & 0x0f);
                k = (byte) (b1 & 0x03);
                byte val1 = ((b1 & SIGN) == 0)? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
                byte val2 = ((b2 & SIGN) == 0)? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
                byte val3 = ((b3 & SIGN) == 0)? (byte) (b3 >> 6) : (byte) ((b3) >> 6 ^ 0xfc);
                if (fDebug){
                    System.out.println ("val2 = " + val2);
                    System.out.println ("k4   = " + (k << 4));
                    System.out.println ("vak  = " + (val2 | (k << 4)));
                }
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
            }
            // form integral number of 6-bit groups
            if (fewerThan24bits == EIGHTBIT){
                b1 = binaryData[dataIndex];
                k = (byte) (b1 & 0x03);
                if (fDebug){
                    System.out.println ("b1=" + b1);
                    System.out.println ("b1<<2 = " + (b1 >> 2));
                }
                byte val1 = ((b1 & SIGN) == 0)? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
                encodedData[encodedIndex++] = PAD;
                encodedData[encodedIndex++] = PAD;
            } else if (fewerThan24bits == SIXTEENBIT){
                b1 = binaryData[dataIndex];
                b2 = binaryData[dataIndex + 1];
                l = (byte) (b2 & 0x0f);
                k = (byte) (b1 & 0x03);
                byte val1 = ((b1 & SIGN) == 0)? (byte) (b1 >> 2) : (byte) ((b1) >> 2 ^ 0xc0);
                byte val2 = ((b2 & SIGN) == 0)? (byte) (b2 >> 4) : (byte) ((b2) >> 4 ^ 0xf0);
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
                encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
                encodedData[encodedIndex++] = PAD;
            }
            return new String (encodedData);
        }  

        public static byte[] decode (String encoded){
            if (encoded == null){
                return null;
            }
            char[] base64Data = encoded.toCharArray ();
            // remove white spaces
            int len = removeWhiteSpace (base64Data);
            if (len % FOURBYTE != 0){
                return null;// should be divisible by four
            }
            int numberQuadruple = (len / FOURBYTE);
            if (numberQuadruple == 0){
                return new byte[0];
            }
            byte decodedData[] = null;
            byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
            char d1 = 0, d2 = 0, d3 = 0, d4 = 0;
            int i = 0;
            int encodedIndex = 0;
            int dataIndex = 0;
            decodedData = new byte[(numberQuadruple) * 3];
            for (; i < numberQuadruple - 1; i++){
                if (!isData ((d1 = base64Data[dataIndex++])) || !isData ((d2 = base64Data[dataIndex++])) || !isData ((d3 = base64Data[dataIndex++])) || !isData ((d4 = base64Data[dataIndex++]))){
                    return null;
                }// if found "no data" just return null
                b1 = base64Alphabet[d1];
                b2 = base64Alphabet[d2];
                b3 = base64Alphabet[d3];
                b4 = base64Alphabet[d4];
                decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
                decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
                decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
            }
            if (!isData ((d1 = base64Data[dataIndex++])) || !isData ((d2 = base64Data[dataIndex++]))){
                return null;// if found "no data" just return null
            }
            b1 = base64Alphabet[d1];
            b2 = base64Alphabet[d2];
            d3 = base64Data[dataIndex++];
            d4 = base64Data[dataIndex++];
            if (!isData ((d3)) || !isData ((d4))){// Check if they are PAD characters
                if (isPad (d3) && isPad (d4)){
                    if ((b2 & 0xf) != 0)// last 4 bits should be zero
                    {
                        return null;
                    }
                    byte[] tmp = new byte[i * 3 + 1];
                    System.arraycopy (decodedData, 0, tmp, 0, i * 3);
                    tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
                    return tmp;
                } else if (!isPad (d3) && isPad (d4)){
                    b3 = base64Alphabet[d3];
                    if ((b3 & 0x3) != 0)// last 2 bits should be zero
                    {
                        return null;
                    }
                    byte[] tmp = new byte[i * 3 + 2];
                    System.arraycopy (decodedData, 0, tmp, 0, i * 3);
                    tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
                    tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
                    return tmp;
                } else{
                    return null;
                }
            } else{ // No PAD e.g 3cQl
                b3 = base64Alphabet[d3];
                b4 = base64Alphabet[d4];
                decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
                decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
                decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
            }
            return decodedData;
        }  

        private static int removeWhiteSpace (char[] data){
            if (data == null){
                return 0;
            }
            // count characters that‘s not whitespace
            int newSize = 0;
            int len = data.length;
            for (int i = 0; i < len; i++){
                if (!isWhiteSpace (data[i])){
                    data[newSize++] = data[i];
                }
            }
            return newSize;
        }
    }  

    public static class BaseHelper {  

        public static String convertStreamToString (InputStream is){
            BufferedReader reader = new BufferedReader (new InputStreamReader (is));
            StringBuilder sb = new StringBuilder ();
            String line = null;
            try{
                while ((line = reader.readLine ()) != null){
                    sb.append (line);
                }
            } catch (IOException e){
                e.printStackTrace ();
            } finally{
                try{
                    is.close ();
                } catch (IOException e){
                    e.printStackTrace ();
                }
            }
            return sb.toString ();
        }  

        public static void showDialog (Activity context, String strTitle, String strText, int icon){
            AlertDialog.Builder tDialog = new AlertDialog.Builder (context);
            tDialog.setIcon (icon);
            tDialog.setTitle (strTitle);
            tDialog.setMessage (strText);
            tDialog.setPositiveButton ("确定", null);
            tDialog.show ();
        }  

        public static void log (String tag, String info){
            // Log.d(tag, info);
        }  

        public static void chmod (String permission, String path){
            try{
                String command = "chmod " + permission + " " + path;
                Runtime runtime = Runtime.getRuntime ();
                runtime.exec (command);
            } catch (IOException e){
                e.printStackTrace ();
            }
        }  

        //
        // show the progress bar.  

        public static ProgressDialog showProgress (Context context, CharSequence title, CharSequence message, boolean indeterminate, boolean cancelable){
            ProgressDialog dialog = new ProgressDialog (context);
            dialog.setTitle (title);
            dialog.setMessage (message);
            dialog.setIndeterminate (indeterminate);
            dialog.setCancelable (false);
            // dialog.setDefaultButton(false);
            dialog.setOnCancelListener (new Fiap.AlixOnCancelListener ((Activity) context));
            dialog.show ();
            return dialog;
        }  

        public static 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 ();
            }
            return json;
        }
    }  

    public class Constant {
        public final static String server_url = "https://msp.alipay.com/x.htm";
    }  

    public class MobileSecurePayer {
        Integer lock = 0;
        IAlixPay mAlixPay = null;
        boolean mbPaying = false;
        Activity mActivity = null;
        // 和安全支付服务建立连接
        private ServiceConnection mAlixPayConnection = new ServiceConnection (){
            public void onServiceConnected (ComponentName className, IBinder service){
                //
                // wake up the binder to continue.
                // 获得通信通道
                synchronized (lock){
                    mAlixPay = IAlixPay.Stub.asInterface (service);
                    lock.notify ();
                }
            }  

            public void onServiceDisconnected (ComponentName className){
                mAlixPay = null;
            }
        };  

        public boolean pay (final String strOrderInfo, final Handler callback, final int myWhat, final Activity activity){
            if (mbPaying)
                return false;
            mbPaying = true;
            //
            mActivity = activity;
            // bind the service.
            // 绑定服务
            if (mAlixPay == null){
                // 绑定安全支付服务需要获取上下文环境，
                // 如果绑定不成功使用mActivity.getApplicationContext().bindService
                // 解绑时同理
                mActivity.getApplicationContext ().bindService (new Intent (IAlixPay.class.getName ()), mAlixPayConnection, Context.BIND_AUTO_CREATE);
            }
            // else ok.
            // 实例一个线程来进行支付
            new Thread (new Runnable (){
                public void run (){
                    try{
                        // wait for the service bind operation to completely
                        // finished.
                        // Note: this is important,otherwise the next mAlixPay.Pay()
                        // will fail.
                        // 等待安全支付服务绑定操作结束
                        // 注意：这里很重要，否则mAlixPay.Pay()方法会失败
                        synchronized (lock){
                            if (mAlixPay == null)
                                lock.wait ();
                        }
                        // register a Callback for the service.
                        // 为安全支付服务注册一个回调
                        mAlixPay.registerCallback (mCallback);
                        // call the MobileSecurePay service.
                        // 调用安全支付服务的pay方法
                        String strRet = mAlixPay.Pay (strOrderInfo);
                        // set the flag to indicate that we have finished.
                        // unregister the Callback, and unbind the service.
                        // 将mbPaying置为false，表示支付结束
                        // 移除回调的注册，解绑安全支付服务
                        mbPaying = false;
                        mAlixPay.unregisterCallback (mCallback);
                        mActivity.getApplicationContext ().unbindService (mAlixPayConnection);
                        // send the result back to caller.
                        // 发送交易结果
                        Message msg = new Message ();
                        msg.what = myWhat;
                        msg.obj = strRet;
                        callback.sendMessage (msg);
                    } catch (Exception e){
                        e.printStackTrace ();
                        // send the result back to caller.
                        // 发送交易结果
                        Message msg = new Message ();
                        msg.what = myWhat;
                        msg.obj = e.toString ();
                        callback.sendMessage (msg);
                    }
                }
            }).start ();
            return true;
        }  

        private IRemoteServiceCallback mCallback = new IRemoteServiceCallback.Stub (){  

            public void startActivity (String packageName, String className, int iCallingPid, Bundle bundle) throws RemoteException{
                Intent intent = new Intent (Intent.ACTION_MAIN, null);
                if (bundle == null)
                    bundle = new Bundle ();
                // else ok.
                try{
                    bundle.putInt ("CallingPid", iCallingPid);
                    intent.putExtras (bundle);
                } catch (Exception e){
                    e.printStackTrace ();
                }
                intent.setClassName (packageName, className);
                mActivity.startActivity (intent);
            }  

            @Override
            public boolean isHideLoadingScreen () throws RemoteException{
                return false;
            }  

            @Override
            public void payEnd (boolean arg0, String arg1) throws RemoteException{  

            }
        };
    }  

    public class MobileSecurePayHelper {
        static final String TAG = "MobileSecurePayHelper";
        private ProgressDialog mProgress = null;
        Context mContext = null;  

        public MobileSecurePayHelper (Context context){
            this.mContext = context;
        }  

        public boolean detectMobile_sp (){
            boolean isMobile_spExist = isMobile_spExist ();
            if (!isMobile_spExist){
                // 获取系统缓冲绝对路径获取/data/data//cache目录
                File cacheDir = mContext.getCacheDir ();
                final String cachePath = cacheDir.getAbsolutePath () + "/temp.apk";
                mProgress = BaseHelper.showProgress (mContext, null, "正在检测安全支付服务版本", false, true);
                // 实例新线程检测是否有新版本进行下载
                new Thread (new Runnable (){
                    public void run (){
                        // 检测是否有新的版本。
                        String newApkdlUrl = checkNewUpdate ();
                        closeProgress ();
                        // 动态下载
                        if (newApkdlUrl != null)
                            retrieveApkFromNet (mContext, newApkdlUrl, cachePath);
                        showInstallConfirmDialog (mContext, cachePath);
                    }
                }).start ();
            }
            return isMobile_spExist;
        }  

        public void showInstallConfirmDialog (final Context context, final String cachePath){
            Looper.prepare ();
            AlertDialog.Builder tDialog = new AlertDialog.Builder (context);
            tDialog.setTitle ("安装提示");
            tDialog.setMessage ("为保证您的交易安全，需要您安装支付宝安全支付服务，才能进行付款。\n\n点击确定，立即安装。");
            tDialog.setPositiveButton ("确定", new DialogInterface.OnClickListener (){
                public void onClick (DialogInterface dialog, int which){
                    //
                    // 修改apk权限
                    BaseHelper.chmod ("777", cachePath);
                    //
                    // install the apk.
                    // 安装安全支付服务APK
                    Intent intent = new Intent (Intent.ACTION_VIEW);
                    intent.addFlags (Intent.FLAG_ACTIVITY_NEW_TASK);
                    intent.setDataAndType (Uri.parse ("file://" + cachePath), "application/vnd.android.package-archive");
                    context.startActivity (intent);
                }
            });
            tDialog.setNegativeButton ("取消", new DialogInterface.OnClickListener (){
                public void onClick (DialogInterface dialog, int which){}
            });
            tDialog.show ();
            Looper.loop ();
        }  

        public boolean isMobile_spExist (){
            PackageManager manager = mContext.getPackageManager ();
            List<PackageInfo> pkgList = manager.getInstalledPackages (0);
            for (int i = 0; i < pkgList.size (); i++){
                PackageInfo pI = pkgList.get (i);
                if (pI.packageName.equalsIgnoreCase ("com.alipay.android.app"))
                    return true;
            }
            return false;
        }  

        public boolean retrieveApkFromAssets (Context context, String fileName, String path){
            boolean bRet = false;
            try{
                InputStream is = context.getAssets ().open (fileName);
                File file = new File (path);
                file.createNewFile ();
                FileOutputStream fos = new FileOutputStream (file);
                byte[] temp = new byte[1024];
                int i = 0;
                while ((i = is.read (temp)) > 0){
                    fos.write (temp, 0, i);
                }
                fos.close ();
                is.close ();
                bRet = true;
            } catch (IOException e){
                e.printStackTrace ();
            }
            return bRet;
        }  

        public PackageInfo getApkInfo (Context context, String archiveFilePath){
            PackageManager pm = context.getPackageManager ();
            PackageInfo apkInfo = pm.getPackageArchiveInfo (archiveFilePath, PackageManager.GET_META_DATA);
            return apkInfo;
        }  

        public String checkNewUpdate (){
            String url = null;
            try{
//                JSONObject resp = sendCheckNewUpdate (packageInfo.versionName);
                 JSONObject resp = sendCheckNewUpdate("1.0.0");
                if (resp.getString ("needUpdate").equalsIgnoreCase ("true")){
                    url = resp.getString ("updateUrl");
                }
                // else ok.
            } catch (Exception e){
                e.printStackTrace ();
            }
            return url;
        }  

        public JSONObject sendCheckNewUpdate (String versionName){
            JSONObject objResp = null;
            try{
                JSONObject req = new JSONObject ();
                req.put (AlixDefine.action, AlixDefine.actionUpdate);
                JSONObject data = new JSONObject ();
                data.put (AlixDefine.platform, "android");
                data.put (AlixDefine.VERSION, versionName);
                data.put (AlixDefine.partner, "");
                req.put (AlixDefine.data, data);
                objResp = sendRequest (req.toString ());
            } catch (JSONException e){
                e.printStackTrace ();
            }
            return objResp;
        }  

        public JSONObject sendRequest (final String content){
            NetworkManager nM = new NetworkManager (this.mContext);
            //
            JSONObject jsonResponse = null;
            try{
                String response = null;
                synchronized (nM){
                    //
                    response = nM.SendAndWaitResponse (content, Constant.server_url);
                }
                jsonResponse = new JSONObject (response);
            } catch (Exception e){
                e.printStackTrace ();
            }
            //
            if (jsonResponse != null)
                BaseHelper.log (TAG, jsonResponse.toString ());
            return jsonResponse;
        }  

        public boolean retrieveApkFromNet (Context context, String strurl, String filename){
            boolean bRet = false;
            try{
                NetworkManager nM = new NetworkManager (this.mContext);
                bRet = nM.urlDownloadToFile (context, strurl, filename);
            } catch (Exception e){
                e.printStackTrace ();
            }
            return bRet;
        }  

        //
        // close the progress bar
        void closeProgress (){
            try{
                if (mProgress != null){
                    mProgress.dismiss ();
                    mProgress = null;
                }
            } catch (Exception e){
                e.printStackTrace ();
            }
        }
    }  

    public class NetworkManager {
        static final String TAG = "NetworkManager";
        private int connectTimeout = 30 * 1000;
        private int readTimeout = 30 * 1000;
        Proxy mProxy = null;
        Context mContext;  

        public NetworkManager (Context context){
            this.mContext = context;
            setDefaultHostnameVerifier ();
        }  

        @SuppressWarnings ("deprecation")
        private void detectProxy (){
            ConnectivityManager cm = (ConnectivityManager) mContext.getSystemService (Context.CONNECTIVITY_SERVICE);
            NetworkInfo ni = cm.getActiveNetworkInfo ();
            if (ni != null && ni.isAvailable () && ni.getType () == ConnectivityManager.TYPE_MOBILE){
                String proxyHost = android.net.Proxy.getDefaultHost ();
                int port = android.net.Proxy.getDefaultPort ();
                if (proxyHost != null){
                    final InetSocketAddress sa = new InetSocketAddress (proxyHost, port);
                    mProxy = new Proxy (Proxy.Type.HTTP, sa);
                }
            }
        }  

        private void setDefaultHostnameVerifier (){
            //
            HostnameVerifier hv = new HostnameVerifier (){
                public boolean verify (String hostname, SSLSession session){
                    return true;
                }
            };
            HttpsURLConnection.setDefaultHostnameVerifier (hv);
        }  

        public String SendAndWaitResponse (String strReqData, String strUrl){
            //
            detectProxy ();
            String strResponse = null;
            ArrayList<BasicNameValuePair> pairs = new ArrayList<BasicNameValuePair> ();
            pairs.add (new BasicNameValuePair ("requestData", strReqData));
            HttpURLConnection httpConnect = null;
            UrlEncodedFormEntity p_entity;
            try{
                p_entity = new UrlEncodedFormEntity (pairs, "utf-8");
                URL url = new URL (strUrl);
                if (mProxy != null){
                    httpConnect = (HttpURLConnection) url.openConnection (mProxy);
                } else{
                    httpConnect = (HttpURLConnection) url.openConnection ();
                }
                httpConnect.setConnectTimeout (connectTimeout);
                httpConnect.setReadTimeout (readTimeout);
                httpConnect.setDoOutput (true);
                httpConnect.addRequestProperty ("Content-type", "application/x-www-form-urlencoded;charset=utf-8");
                httpConnect.connect ();
                OutputStream os = httpConnect.getOutputStream ();
                p_entity.writeTo (os);
                os.flush ();
                InputStream content = httpConnect.getInputStream ();
                strResponse = BaseHelper.convertStreamToString (content);
                BaseHelper.log (TAG, "response " + strResponse);
            } catch (IOException e){
                e.printStackTrace ();
            } finally{
                httpConnect.disconnect ();
            }
            return strResponse;
        }  

        public boolean urlDownloadToFile (Context context, String strurl, String path){
            boolean bRet = false;
            //
            detectProxy ();
            try{
                URL url = new URL (strurl);
                HttpURLConnection conn = null;
                if (mProxy != null){
                    conn = (HttpURLConnection) url.openConnection (mProxy);
                } else{
                    conn = (HttpURLConnection) url.openConnection ();
                }
                conn.setConnectTimeout (connectTimeout);
                conn.setReadTimeout (readTimeout);
                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];
                int i = 0;
                while ((i = is.read (temp)) > 0){
                    fos.write (temp, 0, i);
                }
                fos.close ();
                is.close ();
                bRet = true;
            } catch (IOException e){
                e.printStackTrace ();
            }
            return bRet;
        }
    }  

    public class ResultChecker {
        public static final int RESULT_INVALID_PARAM = 0;
        public static final int RESULT_CHECK_SIGN_FAILED = 1;
        public static final int RESULT_CHECK_SIGN_SUCCEED = 2;
        String mContent;  

        public ResultChecker (String content){
            this.mContent = content;
        }  

        int checkSign (){
            int retVal = RESULT_CHECK_SIGN_SUCCEED;
            try{
                JSONObject objContent = BaseHelper.string2JSON (this.mContent, ";");
                String result = objContent.getString ("result");
                result = result.substring (1, result.length () - 1);
                // 获取待签名数据
                int iSignContentEnd = result.indexOf ("&sign_type=");
                String signContent = result.substring (0, iSignContentEnd);
                // 获取签名
                JSONObject objResult = BaseHelper.string2JSON (result, "&");
                String signType = objResult.getString ("sign_type");
                signType = signType.replace (""", "");
                String sign = objResult.getString ("sign");
                sign = sign.replace (""", "");
                // 进行验签 返回验签结果
                if (signType.equalsIgnoreCase ("RSA")){
                    if (!Rsa.doCheck (signContent, sign, PartnerConfig.RSA_ALIPAY_PUBLIC))
                        retVal = RESULT_CHECK_SIGN_FAILED;
                }
            } catch (Exception e){
                retVal = RESULT_INVALID_PARAM;
                e.printStackTrace ();
            }
            return retVal;
        }
    }  

    public static class Rsa {
        public static final String SIGN_ALGORITHMS = "SHA1WithRSA";  

        public static String sign (String content, String privateKey){
            String charset = "utf-8";
            try{
                PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec (Base64.decode (privateKey));
                KeyFactory keyf = KeyFactory.getInstance ("RSA");
                PrivateKey priKey = keyf.generatePrivate (priPKCS8);
                java.security.Signature signature = java.security.Signature.getInstance (SIGN_ALGORITHMS);
                signature.initSign (priKey);
                signature.update (content.getBytes (charset));
                byte[] signed = signature.sign ();
                return Base64.encode (signed);
            } catch (Exception e){
                e.printStackTrace ();
            }
            return null;
        }  

        public static boolean doCheck (String content, String sign, String publicKey){
            try{
                KeyFactory keyFactory = KeyFactory.getInstance ("RSA");
                byte[] encodedKey = Base64.decode (publicKey);
                PublicKey pubKey = keyFactory.generatePublic (new X509EncodedKeySpec (encodedKey));
                java.security.Signature signature = java.security.Signature.getInstance (SIGN_ALGORITHMS);
                signature.initVerify (pubKey);
                signature.update (content.getBytes ("utf-8"));
                boolean bverify = signature.verify (Base64.decode (sign));
                return bverify;
            } catch (Exception e){
                e.printStackTrace ();
            }
            return false;
        }
    }
}  

以上即为支付宝SDK的接入流程

Android支付接入（一）：支付宝,布布扣,bubuko.com