原文地址:http://blog.csdn.net/intbird

微信官方文档地址:https://open.weixin.qq.com/cgi-bin/frame?t=resource/res_main_tmpl&verify=1&lang=zh_CN

微信官方Demo:http://download.csdn.net/detail/intbird/8476901

@与server交互通信调用,android端仅仅需获取server參数填入微信.

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1,开启

2,结果(支付和微信分享的Activity要安装api文档上说明的放到指定的包名内),支付结果最好要通知一下server.

3,演示样例

公布使用的签名正确的话取消和成功都能正确通知.

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@自己測试调用:Android自己请求微信server,一般不会这样搞,仅仅是练习须要这样...

1,导入微信的libs包libammsdk.jar;

2,測试时使用weixinDemo中的debug_keystore;

3,须要注意应用要通过审核,而且几个Key值正确,一下为微信支付Demo中的值:

	//微信公众平台id;
	private String app_wx_appid=WxConstants.app_wx_appid;
	//微信开放平台和商户约定的密钥
	private String app_wx_secret_key="db426a9829e4b49a0dcac7b4162da6b6";
	//微信公众平台商户模块和商户约定的密钥
	private String app_wx_parent_key="8934e7d15453e97507ef794cf7b0519d";
	//微信公众平台商户模块和商户约定的支付密钥
	private String app_wx_pay_key="L8LrMqqeGRxST5reouB0K66CaYAWpqhAVsq7ggKkxHCOastWksvuX1uvmvQclxaHoYd3ElNBrNO2DHnnzgfVG9Qs473M3DTOZug5er46FhuGofumV8H2FVR9qkjSlC5K";
	// 商家向財付通申请的商家id */
	private String app_tx_parent_key = "1900000109";
    

==========================================

依据微信支付Demo,微信支付分为三步:

第一步,获取accessToken,accessToken值第二步要用;

private class GetAccessTokenTask extends AsyncTask<Void, Void, WxGetAccessTokenResult> {
		@Override
		protected WxGetAccessTokenResult doInBackground(Void... params) {
			WxGetAccessTokenResult result = getAccessToken();
			return result;
		}
		@Override
		protected void onPostExecute(WxGetAccessTokenResult result) {
			if (result.localRetCode == WxLocalRetCode.ERR_OK) {
				GetPrepayIdTask getPrepayId = new GetPrepayIdTask();
				getPrepayId.execute(result);
			}
		}
	
	}

private WxGetAccessTokenResult getAccessToken() {
		WxGetAccessTokenResult result = new WxGetAccessTokenResult();
		String url = String.format(api_get_access_token, 
				"client_credential",
				app_wx_appid, 
				app_wx_secret_key);
		byte[] buf = WeixinUtil.httpGet(url);
		if (buf == null || buf.length == 0) {
			result.localRetCode = WxLocalRetCode.ERR_HTTP;
			return result;
		}
		String content = new String(buf);
		result.parseFrom(content);
		return result;
	}

private class GetPrepayIdTask extends AsyncTask<WxGetAccessTokenResult, Void, WxGetPrepayIdResult> {
		@Override
		protected WxGetPrepayIdResult doInBackground(WxGetAccessTokenResult... params) {
			WxGetPrepayIdResult result = getPrepayId(params[0]);
			return result;
		}
		@Override
		protected void onPostExecute(WxGetPrepayIdResult result) {
			if (result.localRetCode == WxLocalRetCode.ERR_OK) {
				sendPayReq(result);
			}
		}
	}

private WxGetPrepayIdResult getPrepayId(WxGetAccessTokenResult accessTokenResult) {
		String url = String.format(api_get_preorder_id,accessTokenResult.accessToken);
		String entity = appSign.getWxPrepayAppSign();
		
		WxGetPrepayIdResult result = new WxGetPrepayIdResult();
		
		byte[] buf = WeixinUtil.httpPost(url, entity);
		if (buf == null || buf.length == 0) {
			result.localRetCode = WxLocalRetCode.ERR_HTTP;
			return result;
		}
		
		String content = new String(buf);
		result.parseFrom(content);
		return result;
	}

<span style="white-space:pre">	</span>private void sendPayReq(WxGetPrepayIdResult result) {
		
		PayReq req = new PayReq();
		req.appId = app_wx_appid;
		req.partnerId = app_tx_parent_key;
		req.prepayId = result.prepayId;
		req.nonceStr = appSign.getNoncestr();
		req.timeStamp = appSign.getTimestamp();
		req.packageValue = "Sign=" + appSign.getPackageSign();
		
		List<NameValuePair> signParams = new LinkedList<NameValuePair>();
		signParams.add(new BasicNameValuePair("appid", req.appId));
		signParams.add(new BasicNameValuePair("appkey", app_wx_pay_key));
		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 = WeixinUtil.genSign(signParams);
		
		wxRequest.sendReq(req);
	}

package net.sourceforge.simcpux.wxapi;
public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler{<pre name="code" class="java"><span style="white-space:pre">	</span>@Override
	public void onResp(BaseResp resp) {
		Log.d(TAG, "onPayFinish, errCode = " + resp.errCode);

		if (resp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setTitle("支付结果");
			builder.setMessage("支付结果"+String.valueOf(resp.errCode));
			builder.show();
		}
	}

临时没想到其它想说的,先看个效果

1,包结构,须要注意的就是接收微信返回结果的那个类名;

2,组装数据,规则在文档中有说明

//package_ 字段生成方法
//package生成方法：
//A)对全部传入參数依照字段名的ASCII 码从小到大排序（字典序）后，使用URL 键值对的格式（即key1=value1&key2=value2…）拼接成字符串string1；
//B) 在string1 最后拼接上key=partnerKey 得到stringSignTemp 字符串。 并对 stringSignTemp进行md5 运算，再将得到的字符串全部字符转换为大写，得到sign值signValue。

//C)对string1 中的全部键值对中的value 进行urlencode 转码，依照a 步骤又一次拼接成字符串。得到string2。对于js 前端程序。一定要使用函数encodeURIComponent 进行urlencode编码（注意！进行urlencode时要将空格转化为%20而不是+）。
//D)将sign=signValue 拼接到string1 后面得到终于的package 字符串。


//app_signature生成方法：
//A）參与签名的字段包含：appid、appkey、noncestr、package、timestamp以及 traceid 
//B）对全部待签名參数依照字段名的ASCII 码从小到大排序（字典序）后，使用URL 键值对的格式（即key1=value1&key2=value2…）拼接成字符串string1。 注意：全部參数名均为小写字符
//C）对string1 作签名算法，字段名和字段值都採用原始值。不进行URL 转义。详细签名算法为SHA1