- Call Payment API from APP：https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/pay/In-AppPay/chapter6_3.shtml
- APP Payment Development Guide：https://pay.weixin.qq.com/wiki/doc/api/wxpay/en/pay/In-AppPay/chapter6_2.shtml
- 微信APP支付接入商户服务中心：https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Pay/Vendor_Service_Center.html
- Android/iOS集成与资源下载：https://developers.weixin.qq.com/doc/oplatform/Downloads/Android_Resource.html
- Android SDK（JCenter）：https://bintray.com/wechat-sdk-team/maven
- 微信支付Demo：https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=11_1
服务端请求：
<xml>
<appid>wx28f9d88adc6a2f8c</appid>
<mch_id>118875960</mch_id>
<sub_appid>wxbd832f28f5f626fb</sub_appid>
<sub_mch_id>516669865</sub_mch_id>
<device_info>lianlianpay</device_info>
<nonce_str>09204659701415739073230554964275</nonce_str>
<sign>1483a434a49ab0652fe12a4ad3ac5cbdd2ded39010674cf8be32e43d7fae5ebd</sign>
<sign_type>HMAC-SHA256</sign_type>
<body>test</body>
<attach>product_code=WECHAT_PAY|payment_type=APP_PAYMENT</attach>
<out_trade_no>132021031902460031</out_trade_no>
<fee_type>USD</fee_type>
<total_fee>5080</total_fee>
<spbill_create_ip>127.0.0.1</spbill_create_ip>
<time_start>20210319161732</time_start>
<time_expire>20210319171732</time_expire>
<notify_url>https://callback.appblog.cn/wechatpay/app/payment</notify_url>
<trade_type>APP</trade_type>
</xml>服务端响应：
<xml>
<return_code><![CDATA[SUCCESS]]></return_code>
<return_msg><![CDATA[OK]]></return_msg>
<appid><![CDATA[wx28f9d88adc6a2f8c]]></appid>
<mch_id><![CDATA[118875960]]></mch_id>
<sub_mch_id><![CDATA[516669865]]></sub_mch_id>
<device_info><![CDATA[lianlianpay]]></device_info>
<nonce_str><![CDATA[aIg8QOpFNEv4BBNg]]></nonce_str>
<sign><![CDATA[73B194ECEFEBD7D17C344453B77172CB79A73C4C92BFFE18F1B3E0AEF62D19AA]]></sign>
<result_code><![CDATA[SUCCESS]]></result_code>
<prepay_id><![CDATA[wx19161733475542f14dbbf3d154c1760000]]></prepay_id>
<trade_type><![CDATA[APP]]></trade_type>
<sub_appid><![CDATA[wxbd832f28f5f626fb]]></sub_appid>
</xml>网关响应：
{
"code": 200,
"message": "success",
"data": {
"order_id": "122021031613446007",
"order_status": "Wait_Pay",
"order_amount": "50.80",
"order_currency": "USD",
"create_time": "2021-03-16 10:06:55",
"pay_params": {
"package": "Sign=WXPay",
"appid": "wxbd832f28f5f626fb",
"sign": "d0a0df7888739febefe7b8ab439525f5364b1117cb67f0b8c42227bd85267323",
"partnerid": "118875960",
"prepayid": "wx19161733475542f14dbbf3d154c1760000",
"noncestr": "20210319161733600",
"timestamp": "1616141853"
}
},
"trace_id": "e36b57debc88311d"
}Android客户端唤起请求：
int wxSdkVersion = wxApi.getWXAppSupportAPI();
if (wxSdkVersion >= Build.PAY_SUPPORTED_SDK_INT) {
PayReq req = new PayReq();
req.appId = "wxbd832f28f5f626fb";
req.partnerId = "118875960";
req.prepayId = "wx19161733475542f14dbbf3d154c1760000";
req.nonceStr = "20210319161733600";
req.timeStamp = "1616141853";
req.packageValue = "Sign=WXPay";
req.sign = "d0a0df7888739febefe7b8ab439525f5364b1117cb67f0b8c42227bd85267323";
//req.extData = "app data"; // optional
wxApi.sendReq(req);
} else {
Toast.makeText(MainActivity.this, "not supported", Toast.LENGTH_LONG).show();
}
