此篇僅限於android客戶端整合微信支付

微信支付和支付寶相比的話裡面的坑還是很多的,但是導包導的倒是很簡單,就在在build.gradle檔案中，新增一條依賴就行：

dependencies {
    implementation 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+'
}

或

dependencies {
    implementation 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'
}

然後是配置AndroidManifest.xml裡面的許可權等;

<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"/>
 

還有記得新增

        <!-- 微信支付 -->
        <activity
            android:name=".wxapi.WXPayEntryActivity"
            android:exported="true"
            android:launchMode="singleTop">

        </activity>

到這裡所有的配置就完成了,然後就是寫回調部分:

在專案中新建wxapi資料夾,裡面新增WXPayEntryActivity.java檔案,這個可以在demo裡面找

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;

import com.example.administrator.yunleasepiano.R;
import com.example.administrator.yunleasepiano.application.Api;
import com.tencent.mm.opensdk.constants.ConstantsAPI;
import com.tencent.mm.opensdk.modelbase.BaseReq;
import com.tencent.mm.opensdk.modelbase.BaseResp;
import com.tencent.mm.opensdk.openapi.IWXAPI;
import com.tencent.mm.opensdk.openapi.IWXAPIEventHandler;
import com.tencent.mm.opensdk.openapi.WXAPIFactory;

public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler {
	
	private static final String TAG = "MicroMsg.SDKSample.WXPayEntryActivity";
	
    private IWXAPI api;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.pay_result);
        
    	api = WXAPIFactory.createWXAPI(this, Api.APP_ID);
        api.handleIntent(getIntent(), this);
    }

	@Override
	protected void onNewIntent(Intent intent) {
		super.onNewIntent(intent);
		setIntent(intent);
        api.handleIntent(intent, this);
	}

	@Override
	public void onReq(BaseReq req) {
	}

	@SuppressLint("LongLogTag")
	@Override
	public void onResp(BaseResp resp) {
		Log.d(TAG, "返回的code, errCode = " + resp.errCode);
	}
}

裡面APP_ID就是你申請的AppID,Log中的code就是返回的結果碼,返回0成功,-1失敗,-2使用者取消支付

回撥中errCode值列表：

 接下來就是調起支付的程式碼,在這之前後臺會給你返回一些引數:

{
    "code": 800,
    "msg": "成功",
    "obj": {
        "code": "",
        "data": {
            "appid": "wx51d5433c248dfeb9",
            "noncestr": "sGWaLxgAUWIamFHJ",
            "partnerid": "1420573002",
            "paysign": "578EA6BCAB4E4994359B13635FDE0110",
            "prepayId": "wx28180836957578f7f69bfc412778574479",
            "sign": "F346A21425D49EA4CF666848AB196EDF",
            "signtype": "MD5",
            "timeStamp": "1543399722"
        },
        "desc": "微信支付載入成功",
        "stateCode": "SUCCESS"
    }
}

咱們要調起支付要的就是這些引數

                        Gson gson = new Gson();
                        WacherBean weixinBean = gson.fromJson(response, WacherBean.class);
                        if (weixinBean.getCode() == 800) {
                            String appid = weixinBean.getObj().getData().getAppid();
                            String partnerid = weixinBean.getObj().getData().getPartnerid();
                            String prepayId = weixinBean.getObj().getData().getPrepayId();
                            String noncestr = weixinBean.getObj().getData().getNoncestr();
                            String timestamp = weixinBean.getObj().getData().getTimeStamp();
                            String sign = weixinBean.getObj().getData().getSign();
                            Log.e("傳遞的六個引數=", appid + "\n" + partnerid + "\n" + prepayId + "\n" + noncestr + "\n" + timestamp + "\n" + sign);
                            IWXAPI msgApi = WXAPIFactory.createWXAPI(ConfirmOrderActivity.this, null);
                            // 將該app註冊到微信
                            msgApi.registerApp(appid);
                            PayReq request = new PayReq();
                            request.appId = appid;
                            request.partnerId = partnerid;
                            request.prepayId = prepayId;
                            request.packageValue = "Sign=WXPay";
                            request.nonceStr = noncestr;
                            request.timeStamp = timestamp;
                            request.sign = sign;
                            msgApi.sendReq(request);
                        }

如果返回的一直是-1,那就請後臺的同事檢查一下返回的資料是不是正確了

支付寶支付:https://blog.csdn.net/lanrenxiaowen/article/details/84573622