1.集成微信支付SDK：

在build.gradle中，添加如下依赖

compile 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+'

2.设置微信支付回调页面：

路径：项目包名.wxapi名称：WXPayEntryActivity

public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler {

private IWXAPI api;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.wx_pay_result);

api = WXAPIFactory.createWXAPI(this, "你的APP_ID");

api.handleIntent(getIntent(), this);

}

@Override

protected void onNewIntent(Intent intent) {

super.onNewIntent(intent);

setIntent(intent);

api.handleIntent(intent, this);

}

@Override

public void onResp(BaseResp resp) {

int errCode = resp.errCode;

}

}

errCode:说明

0：成功……展示成功页面。

-1：错误……可能的原因：签名错误、未注册APPID、项目设置APPID不正确、注册的APPID与设置的不匹配、其他异常等。

-2：用户取消……无需处理。发生场景：用户不支付了，点击取消，返回APP。

3.设置Manifest

android:name=".wxapi.WXPayEntryActivity"

android:exported="true"

android:launchMode="singleTop">

4.设置MD5

public class MD5 {

private MD5() {

}

public final static String getMessageDigest(byte[] buffer) {

char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

try {

MessageDigest mdTemp = MessageDigest.getInstance("MD5");

mdTemp.update(buffer);

byte[] md = mdTemp.digest();

int j = md.length;

char str[] = new char[j * 2];

int k = 0;

for (int i = 0; i < j; i++) {

byte byte0 = md[i];

str[k++] = hexDigits[byte0 >>> 4 & 0xf];

str[k++] = hexDigits[byte0 & 0xf];

}

return new String(str);

} catch (Exception e) {

return null;

}

}

}

5.发起微信支付

/**

* 注册微信支付

*/

private void registerWx() {

IWXAPI wxapi = WXAPIFactory.createWXAPI(context, null);

wxapi.registerApp("你的APP_ID");

}

/**

* 发起微信支付

*/

private void wxPay() {

PayReq payReq = new PayReq();

payReq.appId = "后台返回的appId";

payReq.partnerId = "后台返回的partnerId";

payReq.prepayId = "后台返回的prepayId";

payReq.packageValue = "后台返回的package";

payReq.nonceStr = "后台返回的nonceStr";

payReq.timeStamp = "后台返回的timeStamp";

payReq.signType = "后台返回的signType";

payReq.sign = signNum();

wxapi.sendReq(payReq);

}

/**

* 拼接sign

*/

public static String signNum() {

String stringA = "appid=" + "后台返回的appid" +

"&noncestr=" + "后台返回的noncestr" +

"&package=" + "后台返回的package" +

"&partnerid=" + "后台返回的partnerid" +

"&prepayid=" + "后台返回的prepayid" +

"&timestamp=" + "后台返回的timestamp";

String stringSignTemp = stringA + "&key=" + "后台商户服务端的key";

String sign = MD5.getMessageDigest(stringSignTemp.getBytes()).toUpperCase();

return sign;

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。