為什么我敢說是權(quán)威版呢？

我在網(wǎng)上查閱了大量資料拼弃，他們給出的方案都不是最安全的做法，所有的操作都是放在客戶端摇展，而官方推薦的做法是放在服務(wù)器吻氧，支付成敗結(jié)果應(yīng)該由服務(wù)器來同步完成，而我的方案是經(jīng)過重重考驗(yàn)而后得出來的咏连。

Android集成微信支付
微信支付和支付寶支付一樣的盯孙，都可以在客戶端發(fā)起支付并成功通過，但這樣做的漏洞比較大祟滴，所以一定不要通過客戶端直接來完成

1.首先需要 在客戶端向服務(wù)器發(fā)起一個(gè)微信預(yù)支付操作：

請(qǐng)求參數(shù)如下：

body.put("loginUserId", loginUserId );
body.put("title", title);
body.put("business", business);
body.put("orderId", orderId);
body.put("charges", charges); //  注意這里的金額是要在實(shí)際金額*100
body.put("employeeId", employeeId);
body.put("WXAppId", Const.WX_APP_ID);

微信預(yù)支付操作處理后可以從微信服務(wù)器獲取一個(gè)預(yù)支付id振惰，然后再通過預(yù)支付id真正發(fā)起微信支付操作.

 WXPayUtil payUtil = new WXPayUtil(mActivity);
 payUtil.doPayReq(bean.prepay_id);

具體代碼放一下，反正也沒有什么機(jī)密

public class WXPayUtil {
   private PayReq req = null;
   private IWXAPI msgApi = null;
   private StringBuffer sb = null;


   public WXPayUtil(final Activity activity) {
       this.req = new PayReq();
       this.msgApi = WXAPIFactory.createWXAPI(activity, null);
       this.msgApi.registerApp(Constants.APP_ID);
       this.sb = new StringBuffer();
   }


   /**
    * @work:生成簽名參數(shù)
    * @date:2015-9-7 上午11:48:04
    * @author:hg_liuzl@163.com
    * @params:
    */
   public void doPayReq(String prePayId) {
       req.appId = Constants.APP_ID;
       req.partnerId = Constants.MCH_ID;
       req.prepayId = prePayId;
       req.packageValue = "Sign=WXPay";
       req.nonceStr = genNonceStr();
       req.timeStamp = String.valueOf(genTimeStamp());
       List<NameValuePair> signParams = new LinkedList<>();
       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");
       sendPayReq();
   }

   /**
    * @work:啟動(dòng)支付
    * @date:2015-9-7 上午11:49:51
    * @author:hg_liuzl@163.com
    */
   private void sendPayReq() {
       msgApi.registerApp(Constants.APP_ID);
       msgApi.sendReq(req);
   }

   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.API_KEY);

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

   private String genNonceStr() {
       Random random = new Random();
       return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
   }

   private long genTimeStamp() {
       return System.currentTimeMillis() / 1000;
   }

然后微信的操作如下：

public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler{
    
    /***微信支付結(jié)果*/
    public static int mWXPayResult = -1;

    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, Constants.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) {
    }

    @Override
    public void onResp(BaseResp resp) {

        if (resp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {
            
            mWXPayResult = resp.errCode;
            
            if (resp.errCode == 0) //支付成功踱启，
            {   
                BToast.show(this, "支付成功!");
                finish();
            } else if(resp.errCode == -1) { //支付失敗
                BToast.show(this, "支付錯(cuò)誤");
                finish();
            }else if(resp.errCode == -2){//取消支付
                BToast.show(this, "您已經(jīng)取消了支付报账！");
                finish();
            }
        }
    }
}

這里我有一個(gè)全局靜態(tài)變量mWXPayResult來標(biāo)記微信支付是否成功的狀態(tài).

  mPayBean.payResult = WXPayEntryActivity.mWXPayResult == 0;
                if (mPayBean.payResult) {
                    doSubmit();
                } 

這個(gè)時(shí)候微信支付就處理完畢.