Android—基于微信开放平台v3SDK,开发微信支付填坑。

接触微信支付之前听说过这是一个坑,,,心里已经有了准备。。。我以为我没准跳坑出不来了,没有想到我填上了,调用成功之后我感觉公司所有的同事都是漂亮的,隔着北京的大雾霾我仿佛看见了太阳~~~好了,装逼结束。。。进入正题

开发准备:

1.在微信开放平台申请账号

2.成功后创建应用,就是填一些看似很官方很正经的资料了。。。(说审核7天左右,没有意外的情况下你的app第二天就审核成功了是不是很开心,有了appid,是不是就可以调用微   信支付了????-------想多了,真的)

3.微信支付是需要额外申请的:需要资料审核,账户验证,协议签署等步骤,(我记得,,资料审核要填写的东西好多,,,好多,,,账户验证就是你审核成功后微信会发送邮件到你   注册时登记的邮箱账号,其中含有随机金额用于账户验证,协议签署,略,太简单)一定要好好阅读你邮件的任何信息,因为有的细节错了,,,你可能填坑很久。。。。。。

正式开发阶段:

问题1:

调用官方的SDK发现只能成功的调起一次微信,再次支付的时候怎么也调用不起来了

解决:

似乎不是什么正经方法:在手机设置中管理应用程序,清除微信数据,缓存,,再来一遍,绝对可以调起来(当然还是只是一次。。。。)

继续:

我认为要用微信支付嘛,,就只看了调用支付接口的文档:

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后来发现需要的参数prepayid是怎么也找不到啊,,后来才发现这个prepayid是先调用”统一下单“这个接口时候温馨反过来的东西,但是官方的SDK中并没有统一下单的代码。坑吗???

所以要先看统一下单文档了 

1.使用自己的APP调用的时候把官网down下来的SDK中WXPayEntryActivity拷贝到自己的项目,所在包的名字最后一定是.wxapi(我连包一起拷了。。。。)

2.在项目清单文件中填写:

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w_hAKQZvlv_vNxVKPe-MvhmWbPV8sGHjPVPjMAx4Fskj.png

 3.SDK中的AppRegister拷贝下来,,,里面换成你自己的appid,然后在项目清单中也注册一下。

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w4-EGW5cmwLExjLnsY1szAaYdEY0Js5FpIxFkGzHuVkV.png

4.重点来了,,就是你APP要调微信支付的activity,我这还叫PayActivity

 要调起微信支付页面,要在这个activity中,将你的app注册到微信

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w3Nj-1XAKhdmr20HTddgf6LtnNDbBC92Mxiq_MQQO6oF.png

接下来先调用统一下单获取prepayid,参数,微信人家要xml格式的!我们就得发送xml格式的!

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w4yZPkyEQOO2VgMfNPfoCEXbnXbaIG9FUszMKrP7fhOq.png

好了调用的时候把这个方法的返回值当参数传,,等待微信返回success吧!。。

 我遇见的错误:签名错误

我的原因是大意了 ConfigUtil.NOTIFY_URL这个参数写的空字符串

还有是因为debug版运行的,没有打包运行

返回成功之后,可以调用支付接口了

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w1O3JeS1rNoXoy1ONiQ4o1AgtaDGT8TQY_wfrbcrGw6P.png

不要忘了这一步去跳转界面,,,,,

DbhVozhcEZvQGMfR6Pkc-A33RMAoVqH3kdctdDxLPix3lLm7z7TQCyOPr5O89zcVI_gRkXyoWs4W1y_vD8j7w_TJrXZG5HxFAnoXhb597JhsQwFu9qFeqnWf8l_Oo2KQ.png

没有跳转到微信支付可能是你由运行的debug版本,,,,没有打包。。。。。

下面是我的PayActivity完整代码:

package com.example.taijiapp.ui;

import java.io.StringReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Random;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.xmlpull.v1.XmlPullParser;

import com.example.taijiapp.R;
import com.example.taijiapp.util.Constants;
import com.example.taijiapp.util.MD5;
import com.example.taijiapp.util.T;
import com.example.taijiapp.util.Util;
import com.example.taijiapp.utils.ConfigUtil;
import com.tencent.mm.sdk.modelpay.PayReq;
import com.tencent.mm.sdk.openapi.IWXAPI;
import com.tencent.mm.sdk.openapi.WXAPIFactory;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.util.Xml;
import android.view.View;
import android.widget.Button;

public class PayActivity extends Activity {
	PayReq req;
	private IWXAPI msgApi;
	Map<String, String> resultunifiedorder;
	StringBuffer sb;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.pay);
		req = new PayReq();
		sb = new StringBuffer();
		msgApi = WXAPIFactory.createWXAPI(this, Constants.APP_ID);
		/**
		 * 将app注册到微信
		 */
		boolean registerApp = msgApi.registerApp(Constants.APP_ID);
		T.show(this, "注册========"+registerApp+"");
		Button appayBtn = (Button) findViewById(R.id.appay_btn);
		Button check_pay_btn = (Button) findViewById(R.id.check_pay_btn);
		appayBtn.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				GetPrepayIdTask getPrepayId = new GetPrepayIdTask();
				getPrepayId.execute();
			}
		});
		/**
		 * 将该app注册到微信
		 */
		check_pay_btn.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				genPayReq();
				sendPayReq();
				
			}
		});
//		// 生成签名参数
//		Button appay_pre_btn = (Button) findViewById(R.id.appay_pre_btn);
//		appay_pre_btn.setOnClickListener(new View.OnClickListener() {
//
//			@Override
//			public void onClick(View v) {
//				genPayReq();
//			}
//		});
	}
	/**
	 * 生成签名
	 */

	private String genPackageSign(List<NameValuePair> params) {
		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < params.size(); i++) {
			sb.append(params.get(i).getName());
			sb.append('=');
			sb.append(params.get(i).getValue());
			sb.append('&');
		}
		sb.append("key=");
		sb.append(Constants.KEY);
		Log.e("拼接=====", sb.toString());
		String packageSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
		Log.e("orion生成签名===", packageSign);
		return packageSign;
	}

	/**
	 * 签名工具 不含商户密钥 -暂时不用 = * 编码格式 UTF-8 = * @return
	 */
	public static String createSignNoKey(List<NameValuePair> params) {
		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < params.size(); i++) {
			sb.append(params.get(i).getName());
			sb.append('=');
			sb.append(params.get(i).getValue());
			sb.append('&');
		}
		String signStr = sb.toString();
		String subStr = signStr.substring(0, signStr.length() - 1);
		// 注意sign转为大写
		return MD5.getMessageDigest(subStr.getBytes()).toUpperCase();
	}

	private String genAppSign(List<NameValuePair> params) {
		StringBuilder sb = new StringBuilder();

		for (int i = 0; i < params.size(); i++) {
			sb.append(params.get(i).getName());
			sb.append('=');
			sb.append(params.get(i).getValue());
			sb.append('&');
		}
		sb.append("key=");
		sb.append(Constants.KEY);

		this.sb.append("sign str\n" + sb.toString() + "\n\n");
		String appSign = MD5.getMessageDigest(sb.toString().getBytes());
		Log.e("orion", appSign);
		return appSign;
	}

	private String toXml(List<NameValuePair> params) {
		StringBuilder sb = new StringBuilder();
		sb.append("<xml>");
		for (int i = 0; i < params.size(); i++) {
			sb.append("<" + params.get(i).getName() + ">");

			sb.append(params.get(i).getValue());
			sb.append("</" + params.get(i).getName() + ">");
		}
		sb.append("</xml>");

		Log.e("orion", sb.toString());
		return sb.toString();
	}

	private class GetPrepayIdTask extends AsyncTask<Void, Void, Map<String, String>> {

		private ProgressDialog dialog;

		@Override
		protected void onPreExecute() {
			dialog = ProgressDialog.show(PayActivity.this, getString(R.string.app_tip),
					getString(R.string.getting_prepayid));
		}

		@Override
		protected void onPostExecute(Map<String, String> result) {
			if (dialog != null) {
				dialog.dismiss();
			}
			sb.append("prepay_id\n" + result.get("prepay_id") + "\n\n");

			resultunifiedorder = result;

		}

		@Override
		protected void onCancelled() {
			super.onCancelled();
		}

		@Override
		protected Map<String, String> doInBackground(Void... params) {

			String url = String.format("https://api.mch.weixin.qq.com/pay/unifiedorder");
			String entity = genProductArgs();
			Log.e("orion===发送过去", entity);
			byte[] buf = Util.httpPost(url, entity);

			String content = new String(buf);
			Log.e("orion", content);
			Map<String, String> xml = decodeXml(content);

			return xml;
		}
	}

	public Map<String, String> decodeXml(String content) {

		try {
			Map<String, String> xml = new HashMap<String, String>();
			XmlPullParser parser = Xml.newPullParser();
			parser.setInput(new StringReader(content));
			int event = parser.getEventType();
			while (event != XmlPullParser.END_DOCUMENT) {

				String nodeName = parser.getName();
				switch (event) {
				case XmlPullParser.START_DOCUMENT:

					break;
				case XmlPullParser.START_TAG:

					if ("xml".equals(nodeName) == false) {
						// 实例化student对象
						xml.put(nodeName, parser.nextText());
					}
					break;
				case XmlPullParser.END_TAG:
					break;
				}
				event = parser.next();
			}

			return xml;
		} catch (Exception e) {
			Log.e("orion", e.toString());
		}
		return null;

	}
    /**
     * 生成随机数
     * @return
     */
	private String genNonceStr() {
		Random random = new Random();
		return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
	}
    /**
     * 时间戳
     * @return
     */
	private long genTimeStamp() {
		return System.currentTimeMillis() / 1000;
	}
    /**
     * 随机数
     * @return
     */
	private String genOutTradNo() {
		Random random = new Random();
		return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
	}
    /**
     * 获取设备的ip地址
     * @return
     */
	public String getLocalIpAddress() {
		try {
			for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
				NetworkInterface intf = en.nextElement();
				for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
					InetAddress inetAddress = enumIpAddr.nextElement();
					if (!inetAddress.isLoopbackAddress()) {
						return inetAddress.getHostAddress().toString();
					}
				}
			}
		} catch (SocketException ex) {
		}
		return null;
	}

	private String getWifiIp() {
		// 获取wifi服务
		WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
		// 判断wifi是否开启
		if (!wifiManager.isWifiEnabled()) {
			wifiManager.setWifiEnabled(true);
		}
		WifiInfo wifiInfo = wifiManager.getConnectionInfo();
		int ipAddress = wifiInfo.getIpAddress();
		String ip = intToIp(ipAddress);
		return ip;
	}
    /**
     * 转化成Ip地址的格式
     * @param i
     * @return
     */
	private String intToIp(int i) {

		return (i & 0xFF) + "." + ((i >> 8) & 0xFF) + "." + ((i >> 16) & 0xFF) + "." + (i >> 24 & 0xFF);
	}

	private String genProductArgs() {
		StringBuffer xml = new StringBuffer();
		String ip = getWifiIp();
		if (ip == "" && ip == "") {
			ip = getLocalIpAddress();
		}
		try {
			String nonceStr = genNonceStr();
			xml.append("</xml>");
			List<NameValuePair> packageParams = new LinkedList<NameValuePair>();
			packageParams.add(new BasicNameValuePair("appid", Constants.APP_ID));
			packageParams.add(new BasicNameValuePair("body", "APPtest"));
			packageParams.add(new BasicNameValuePair("mch_id", Constants.MCH_ID));
			packageParams.add(new BasicNameValuePair("nonce_str", nonceStr));
			packageParams.add(new BasicNameValuePair("notify_url", ConfigUtil.NOTIFY_URL));
			packageParams.add(new BasicNameValuePair("out_trade_no", genOutTradNo()));
			packageParams.add(new BasicNameValuePair("spbill_create_ip", ip));
			packageParams.add(new BasicNameValuePair("total_fee", "100"));
			packageParams.add(new BasicNameValuePair("trade_type", "APP"));
			String sign = genPackageSign(packageParams);
			packageParams.add(new BasicNameValuePair("sign", sign));
			String xmlstring = toXml(packageParams);
			return xmlstring;
		} catch (Exception e) {
			Log.e("TAG", "fail, ex = " + e.getMessage());
			return null;
		}
	}

	private void genPayReq() {
		req.appId = Constants.APP_ID;
		req.partnerId = Constants.MCH_ID;
		req.prepayId = resultunifiedorder.get("prepay_id");
		req.packageValue = "prepay_id=" + resultunifiedorder.get("prepay_id");
		req.nonceStr = genNonceStr();
		req.timeStamp = String.valueOf(genTimeStamp());
		List<NameValuePair> signParams = new LinkedList<NameValuePair>();
		signParams.add(new BasicNameValuePair("appid", req.appId));
		signParams.add(new BasicNameValuePair("noncestr", req.nonceStr));
		signParams.add(new BasicNameValuePair("package", req.packageValue));
		signParams.add(new BasicNameValuePair("partnerid", req.partnerId));
		signParams.add(new BasicNameValuePair("prepayid", req.prepayId));
		signParams.add(new BasicNameValuePair("timestamp", req.timeStamp));
		req.sign = genAppSign(signParams);
		sb.append("sign\n" + req.sign + "\n\n");
		Log.e("orion==genPayReq===============", signParams.toString());

	}

	private void sendPayReq() {
		boolean sendReq = msgApi.sendReq(req);
		T.show(this, "微信跳转====="+sendReq+"");
	}

}

里面没有的类,,,,呐: http://download.csdn.net/detail/meijuanyou/9571223  自己下载一下拷贝一下。。。

参考博客      https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1

 备忘,希望能给大家带来帮助。。。

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