compile files('libs/alipaySdk-20160223.jar')

<activity
      android:name="com.alipay.sdk.app.H5PayActivity"
      android:configChanges="orientation|keyboardHidden|navigation"
      android:exported="false"
      android:screenOrientation="behind" >
</activity>
<activity
      android:name="com.alipay.sdk.auth.AuthActivity"
      android:configChanges="orientation|keyboardHidden|navigation"
      android:exported="false"
      android:screenOrientation="behind" >
 </activity>

 <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" />

-libraryjars libs/alipaySDK-20160223.jar
-keep class com.alipay.android.app.IAlixPay{*;}
-keep class com.alipay.android.app.IAlixPay$Stub{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback$Stub{*;}
-keep class com.alipay.sdk.app.PayTask{ public *;}
-keep class com.alipay.sdk.app.AuthTask{ public *;}

params.put("money", payMoney);// 商品金额,单位：元
params.put("goodsname", goodsName);// 商品名称

new Thread() {
          @Override
          public void run() {
            super.run();
            PayTask payTask = new PayTask(mActivity);
            String result = payTask.pay(signInfo, true);
            Message message = mHandler.obtainMessage();
            message.what = PAY_RESULT;
            message.obj = result;
            mHandler.sendMessage(message);
          }
        }.start();

 /*支付宝支付结果码*/
  private static final String PAY_OK = "9000";// 支付成功
  private static final String PAY_WAIT_CONFIRM = "8000";// 交易待确认
  private static final String PAY_NET_ERR = "6002";// 网络出错
  private static final String PAY_CANCLE = "6001";// 交易取消
  private static final String PAY_FAILED = "4000";// 交易失败

  /*内部类，处理支付宝支付结果*/
  static class AliPayHandler extends Handler {
    private SoftReference<PayActivity> activitySoftReference;// 使用软引用防止内存泄漏

    public AliPayHandler(PayActivity activity) {
      activitySoftReference = new SoftReference<PayActivity>(activity);
    }

    @Override
    public void handleMessage(Message msg) {
      super.handleMessage(msg);
      PayActivity activity = activitySoftReference.get();

      AliPayResult payResult = new AliPayResult((String) msg.obj);
      String resutStatus = payResult.getResultStatus();
      Log.d(TAG, "statusCode = " + resutStatus);

      if (resutStatus.equals(PAY_OK)) {
        activity.paySuccessed();
      } else if (resutStatus.equals(PAY_CANCLE)) {
        activity.payCanceled();
      } else if (resutStatus.equals(PAY_NET_ERR)) {
        activity.payFailed(NETWORK_ERR);
      } else if (resutStatus.equals(PAY_WAIT_CONFIRM)) {
        activity.payWaitConfirm();
      } else {
        activity.payFailed(UNKNOW_ERR);
      }
    }
  }