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本篇文章为大家展示了Android中怎么接入支付宝实现支付功能，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
1.登录官网
他的官网就是蚂蚁金服的开放平台了，我们可以访问 蚂蚁金服开放平台 ，并且注册账号进行登录
创建应用
如果你是现有的应用直接接入支付功能的话，可以不看这里，我这里是因为需要讲博客所有重新创建了一个项目并且在Android Studio里也重新创建了一个项目，Android Studio里创建的项目我把他叫做SimpleMall，简单商城的意思，那在开放平台我们又是如何去创建应用呢，点击-进入我的开放平台-应用，就可以看到应用管理了。我们点击创建应用
创建成果之后有很多的选项包括需要你上传
这些先不管，我们这个时候可以看到已经拿到了APPID: 2017062807585767，这样我们就可以继续下一步的准备了
3.签约
大部分的功能需要签约才能使用，很遗憾，我这个个体户就不行了
4.配置密钥
配置秘钥是支付这一环节很重要的因素，也是分了两个步骤，生成秘钥和配置秘钥，这里使用的RAS非对称加密
https://docs.open.alipay.com/291/105971
我们按照文档上来，首先是下载工具了，这里有win和mac两个地址，我是win，下载下来是这个样子的
我们按照图中的配置拿到了公钥和私钥
那我们可以配置了，我们找到项目详情
然后这里是两种方式，我们选择的是RSA方式么其实哪种方式都是可以的
到这里，这个也配置好了
5.SDK 下载
到这里，我们就可以直接去下载他的SDK了SDK下载地址
这个压缩包下载下来什么都有，要找到Android的部分
二.SDK集成
我们现在就开始来把jar集成进去，支付宝给我们提供的就是一个jar，我们放进我们的工程里面去
并且在我们的app/build.gradle里配置一下
compile files('libs/alipaySdk-20170623-proguard.jar')这样Jar就集成好了，然后配置一下清单文件
<activity android:name="com.alipay.sdk.app.H5PayActivity" android:configChanges="orientation|keyboardHidden|navigation" android:exported="false" android:screenOrientation="behind"/> <activity android:name="com.alipay.sdk.auth.AuthActivity" android:configChanges="orientation|keyboardHidden|navigation" android:exported="false" android:screenOrientation="behind"/>
并且添加权限
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
如大于等于Android6.0，还需要动态申请下权限
如果你的项目需要混淆，需要添加混淆规则
-libraryjars libs/alipaySDK-20150602.jar
-keep class com.alipay.android.app.IAlixPay{*;}
-keep class com.alipay.android.app.IAlixPay$Stub{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback$Stub{*;}
-keep class com.alipay.sdk.app.PayTask{ public *;}
-keep class com.alipay.sdk.app.AuthTask{ public *;}嗯，可以说得上是比较简单的，我们继续
三.支付接口调用
其实支付宝的调用还是比较简单的，我们来看一下我的调用方式
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button btnPay;
private static final int SDK_PAY_FLAG = 1001;
private String RSA_PRIVATE = "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";
public static final String APPID = "2017062807585767";
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case SDK_PAY_FLAG:
PayResult payResult = new PayResult((Map<String, String>) msg.obj);
//同步获取结果
String resultInfo = payResult.getResult();
Log.i("Pay", "Pay:" + resultInfo);
String resultStatus = payResult.getResultStatus();
// 判断resultStatus 为9000则代表支付成功
if (TextUtils.equals(resultStatus, "9000")) {
Toast.makeText(MainActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
}
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
btnPay = (Button) findViewById(R.id.btnPay);
btnPay.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btnPay:
//秘钥验证的类型 true:RSA2 false:RSA
boolean rsa = false;
//构造支付订单参数列表
Map<String, String> params = OrderInfoUtil2_0.buildOrderParamMap(APPID, rsa);
//构造支付订单参数信息
String orderParam = OrderInfoUtil2_0.buildOrderParam(params);
//对支付参数信息进行签名
String sign = OrderInfoUtil2_0.getSign(params, RSA_PRIVATE, rsa);
//订单信息
final String orderInfo = orderParam + "&" + sign;
//异步处理
Runnable payRunnable = new Runnable() {
@Override
public void run() {
//新建任务
PayTask alipay = new PayTask(MainActivity.this);
//获取支付结果
Map<String, String> result = alipay.payV2(orderInfo, true);
Message msg = new Message();
msg.what = SDK_PAY_FLAG;
msg.obj = result;
mHandler.sendMessage(msg);
}
};
// 必须异步调用
Thread payThread = new Thread(payRunnable);
payThread.start();
break;
}
}
}可以看到我们并没有多少代码，调用起来
但是还是提示有错误，我们来看一下他的返回值
复制代码 代码如下:
{"alipay_trade_app_pay_response":{"code":"40006","msg":"Insufficient Permissions","sub_code":"isv.insufficient-isv-permissions","sub_msg":"ISV权限不足"}}
这是因为我们这个应用并没有去签约功能，所有并没有这个权限，好的，但是起码可以看出我们已经可以调用支持包的支付了，那我们继续来了解他的功能吧
四.Api
首先我们看下他提供的OrderInfoUtil2_0这个工具类
public class OrderInfoUtil2_0 {
/**
* 构造授权参数列表
*
* @param pid
* @param app_id
* @param target_id
* @return
*/
public static Map<String, String> buildAuthInfoMap(String pid, String app_id, String target_id, boolean rsa2) {
Map<String, String> keyValues = new HashMap<String, String>();
// 商户签约拿到的app_id，如：2013081700024223
keyValues.put("app_id", app_id);
// 商户签约拿到的pid，如：2088102123816631
keyValues.put("pid", pid);
// 服务接口名称， 固定值
keyValues.put("apiname", "com.alipay.account.auth");
// 商户类型标识， 固定值
keyValues.put("app_name", "mc");
// 业务类型， 固定值
keyValues.put("biz_type", "openservice");
// 产品码， 固定值
keyValues.put("product_id", "APP_FAST_LOGIN");
// 授权范围， 固定值
keyValues.put("scope", "kuaijie");
// 商户唯一标识，如：kkkkk091125
keyValues.put("target_id", target_id);
// 授权类型， 固定值
keyValues.put("auth_type", "AUTHACCOUNT");
// 签名类型
keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");
return keyValues;
}
/**
* 构造支付订单参数列表
* @param app_id
* @return
*/
public static Map<String, String> buildOrderParamMap(String app_id, boolean rsa2) {
Map<String, String> keyValues = new HashMap<String, String>();
keyValues.put("app_id", app_id);
keyValues.put("biz_content", "{\"timeout_express\":\"30m\",\"product_code\":\"QUICK_MSECURITY_PAY\",\"total_amount\":\"0.01\",\"subject\":\"1\",\"body\":\"我是测试数据\",\"out_trade_no\":\"" + getOutTradeNo() + "\"}");
keyValues.put("charset", "utf-8");
keyValues.put("method", "alipay.trade.app.pay");
keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");
keyValues.put("timestamp", "2016-07-29 16:55:53");
keyValues.put("version", "1.0");
return keyValues;
}
/**
* 构造支付订单参数信息
*
* @param map
* 支付订单参数
* @return
*/
public static String buildOrderParam(Map<String, String> map) {
List<String> keys = new ArrayList<String>(map.keySet());
StringBuilder sb = new StringBuilder();
for (int i = 0; i < keys.size() - 1; i++) {
String key = keys.get(i);
String value = map.get(key);
sb.append(buildKeyValue(key, value, true));
sb.append("&");
}
String tailKey = keys.get(keys.size() - 1);
String tailValue = map.get(tailKey);
sb.append(buildKeyValue(tailKey, tailValue, true));
return sb.toString();
}
/**
* 拼接键值对
*
* @param key
* @param value
* @param isEncode
* @return
*/
private static String buildKeyValue(String key, String value, boolean isEncode) {
StringBuilder sb = new StringBuilder();
sb.append(key);
sb.append("=");
if (isEncode) {
try {
sb.append(URLEncoder.encode(value, "UTF-8"));
} catch (UnsupportedEncodingException e) {
sb.append(value);
}
} else {
sb.append(value);
}
return sb.toString();
}
/**
* 对支付参数信息进行签名
*
* @param map
* 待签名授权信息
*
* @return
*/
public static String getSign(Map<String, String> map, String rsaKey, boolean rsa2) {
List<String> keys = new ArrayList<String>(map.keySet());
// key排序
Collections.sort(keys);
StringBuilder authInfo = new StringBuilder();
for (int i = 0; i < keys.size() - 1; i++) {
String key = keys.get(i);
String value = map.get(key);
authInfo.append(buildKeyValue(key, value, false));
authInfo.append("&");
}
String tailKey = keys.get(keys.size() - 1);
String tailValue = map.get(tailKey);
authInfo.append(buildKeyValue(tailKey, tailValue, false));
String oriSign = SignUtils.sign(authInfo.toString(), rsaKey, rsa2);
String encodedSign = "";
try {
encodedSign = URLEncoder.encode(oriSign, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return "sign=" + encodedSign;
}
/**
* 要求外部订单号必须唯一。
* @return
*/
private static String getOutTradeNo() {
SimpleDateFormat format = new SimpleDateFormat("MMddHHmmss", Locale.getDefault());
Date date = new Date();
String key = format.format(date);
Random r = new Random();
key = key + r.nextInt();
key = key.substring(0, 15);
return key;
}
}而我们一开始就需要构建订单参数列表，就是这个方法
/**
* 构造支付订单参数列表
* @param app_id
* @return
*/
public static Map<String, String> buildOrderParamMap(String app_id, boolean rsa2) {
Map<String, String> keyValues = new HashMap<String, String>();
keyValues.put("app_id", app_id);
keyValues.put("biz_content", "{\"timeout_express\":\"30m\",\"product_code\":\"QUICK_MSECURITY_PAY\",\"total_amount\":\"0.01\",\"subject\":\"1\",\"body\":\"我是测试数据\",\"out_trade_no\":\"" + getOutTradeNo() + "\"}");
keyValues.put("charset", "utf-8");
keyValues.put("method", "alipay.trade.app.pay");
keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");
keyValues.put("timestamp", "2016-07-29 16:55:53");
keyValues.put("version", "1.0");
return keyValues;
}这个方法我们来解读一下吧，他其实就是构建一个Map的键值对，都有哪些内容呢
app_id(key)
biz_content(内容)
charset（编码）
method（方法）
sign_type（签名类型）
timestamp（时间戳）
version（版本）
这个demo里面可能都是写死了，但是如果我们真的要在实际应用中开发支付的话，这里要填写正确，我们主要关心的有方法和签名类型还有版本这三个
方法有几个类型，要注意一下
其次就是签名方式了，有两种，RSA和RSA2
最后就是版本，版本可以通过PayTask去获取
//获取版本
private String getPlayVersion(PayTask payTask){
return payTask.getVersion();
}而关于biz_content，就需要你们自己去定义了，我们来看下全部的参数说明
当我们拿到map之后就可以转换成一个string作为请求信息了，可以看到我们使用的是这个方法
/**
* 构造支付订单参数信息
*
* @param map
* 支付订单参数
* @return
*/
public static String buildOrderParam(Map<String, String> map) {
List<String> keys = new ArrayList<String>(map.keySet());
StringBuilder sb = new StringBuilder();
for (int i = 0; i < keys.size() - 1; i++) {
String key = keys.get(i);
String value = map.get(key);
sb.append(buildKeyValue(key, value, true));
sb.append("&");
}
String tailKey = keys.get(keys.size() - 1);
String tailValue = map.get(tailKey);
sb.append(buildKeyValue(tailKey, tailValue, true));
return sb.toString();
}他的本质就是拼接出最后的订单信息，如图
好的，现在订单详情已经有了我们就可以把订单加密了
/**
* 对支付参数信息进行签名
*
* @param map
* 待签名授权信息
*
* @return
*/
public static String getSign(Map<String, String> map, String rsaKey, boolean rsa2) {
List<String> keys = new ArrayList<String>(map.keySet());
// key排序
Collections.sort(keys);
StringBuilder authInfo = new StringBuilder();
for (int i = 0; i < keys.size() - 1; i++) {
String key = keys.get(i);
String value = map.get(key);
authInfo.append(buildKeyValue(key, value, false));
authInfo.append("&");
}
String tailKey = keys.get(keys.size() - 1);
String tailValue = map.get(tailKey);
authInfo.append(buildKeyValue(tailKey, tailValue, false));
String oriSign = SignUtils.sign(authInfo.toString(), rsaKey, rsa2);
String encodedSign = "";
try {
encodedSign = URLEncoder.encode(oriSign, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return "sign=" + encodedSign;
}这里的加密主要还是用到了SignUtils
public class SignUtils {
private static final String ALGORITHM = "RSA";
private static final String SIGN_ALGORITHMS = "SHA1WithRSA";
private static final String SIGN_SHA256RSA_ALGORITHMS = "SHA256WithRSA";
private static final String DEFAULT_CHARSET = "UTF-8";
private static String getAlgorithms(boolean rsa2) {
return rsa2 ? SIGN_SHA256RSA_ALGORITHMS : SIGN_ALGORITHMS;
}
public static String sign(String content, String privateKey, boolean rsa2) {
try {
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(
Base64.decode(privateKey));
KeyFactory keyf = KeyFactory.getInstance(ALGORITHM);
PrivateKey priKey = keyf.generatePrivate(priPKCS8);
java.security.Signature signature = java.security.Signature
.getInstance(getAlgorithms(rsa2));
signature.initSign(priKey);
signature.update(content.getBytes(DEFAULT_CHARSET));
byte[] signed = signature.sign();
return Base64.encode(signed);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}而SignUtils则启动了Base64
public final class Base64 {
private static final int BASELENGTH = 128;
private static final int LOOKUPLENGTH = 64;
private static final int TWENTYFOURBITGROUP = 24;
private static final int EIGHTBIT = 8;
private static final int SIXTEENBIT = 16;
private static final int FOURBYTE = 4;
private static final int SIGN = -128;
private static char PAD = '=';
private static byte[] base64Alphabet = new byte[BASELENGTH];
private static 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);
}
/**
* Encodes hex octects into Base64
*
* @param binaryData
* Array containing binaryData
* @return Encoded Base64 array
*/
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;
for (int i = 0; i < numberTriplets; i++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];
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);
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);
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);
}
/**
* Decodes Base64 data into octects
*
* @param encoded
* string containing Base64 data
* @return Array containind decoded data.
*/
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;
}
/**
* remove WhiteSpace from MIME containing encoded Base64 data.
*
* @param data
* the byte array of base64 data (with WS)
* @return the new length
*/
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;
}
}这些你都可以在我写的demo里获取到的，我们继续分析就是了，当加密成功之后他会返回一个sign的字符串给我，这就是加密信息，然后通过 订单信息 & 加密订单这种公式就拼接出商品信息
//订单信息 String orderInfo = orderParam + "&" + sign;
好的，我们的下单需要在异步中操作，也就是我们所见到的Runnable
Runnable payRunnable = new Runnable() {
@Override
public void run() {
//新建任务
PayTask alipay = new PayTask(MainActivity.this);
//获取支付结果
Map<String, String> result = alipay.payV2(orderInfo, true);
Message msg = new Message();
msg.what = SDK_PAY_FLAG;
msg.obj = result;
mHandler.sendMessage(msg);
}
};在这里他同样的是构建一个PayTask 区调用payV2，里面的参数就是订单信息和一个boolean值，具体参数可以参考
好的，当我们拿到结果后通过Handler回到UI线程
PayResult payResult = new PayResult((Map<String, String>) msg.obj);
//同步获取结果
String resultInfo = payResult.getResult();
Log.i("Pay", "Pay:" + resultInfo);
String resultStatus = payResult.getResultStatus();
// 判断resultStatus 为9000则代表支付成功
if (TextUtils.equals(resultStatus, "9000")) {
Toast.makeText(MainActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
}这里其实PayResult只是把结果几个关键信息提取出来了
public class PayResult {
private String resultStatus;
private String result;
private String memo;
public PayResult(Map<String, String> rawResult) {
if (rawResult == null) {
return;
}
for (String key : rawResult.keySet()) {
if (TextUtils.equals(key, "resultStatus")) {
resultStatus = rawResult.get(key);
} else if (TextUtils.equals(key, "result")) {
result = rawResult.get(key);
} else if (TextUtils.equals(key, "memo")) {
memo = rawResult.get(key);
}
}
}
@Override
public String toString() {
return "resultStatus={" + resultStatus + "};memo={" + memo
+ "};result={" + result + "}";
}
/**
* @return the resultStatus
*/
public String getResultStatus() {
return resultStatus;
}
/**
* @return the memo
*/
public String getMemo() {
return memo;
}
/**
* @return the result
*/
public String getResult() {
return result;
}
}我们如果想看详细的结果，可以打印resultInfo，好的，关于返回参数，可以参考App支付同步通知参数说明
上述内容就是Android中怎么接入支付宝实现支付功能，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注亿速云行业资讯频道。
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