集成支付宝APP支付

直接按照官方文档逐步集成
官方文档：支付宝APP支付官方文档

Android客户端封装支付宝支付

public class AlipayUtil {


    private static final int SDK_PAY_FLAG = 1;

    //静态内部类单例模式
    public static AlipayUtil getInstance(){
        return SingletonHolder.INSTANCE;
    }

    private static class SingletonHolder{
        private static final AlipayUtil INSTANCE = new AlipayUtil();
    }

    private AlipayUtil(){

    }
    //orderInfo是服务端经过签名后的字符串，isShowPayLoading是否弹出支付宝支付dialog
    public void pay(final Activity activity , final String orderInfo, final boolean isShowPayLoading, final AlipayCallBack callBack){

        @SuppressLint("HandlerLeak")
        final Handler mHandler = new Handler() {
            @SuppressWarnings("unused")
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case SDK_PAY_FLAG: {
                        @SuppressWarnings("unchecked")
                        PayResult payResult = new PayResult((Map<String, String>) msg.obj);
                        callBack.callBack(payResult);
                    }
                }
            }
        };

        Runnable payRunnable = new Runnable() {

            @Override
            public void run() {
                PayTask alipay = new PayTask(activity);
                Map<String, String> result = alipay.payV2(orderInfo, isShowPayLoading);

                Message msg = new Message();
                msg.what = SDK_PAY_FLAG;
                msg.obj = result;
                mHandler.sendMessage(msg);
            }
        };
        // 必须异步调用
        Thread payThread = new Thread(payRunnable);
        payThread.start();
    }


    public interface AlipayCallBack{
        void callBack(PayResult resultSet);
    }


    public  class PayResult {
        private String resultStatus;
        private String result;
        private String memo;

        public PayResult(Map<String, String> rawResult) {
            if (rawResult == null) {
                return;
            }

            for (String key : rawResult.keySet()) {
                if (TextUtils.equals(key, "resultStatus")) {
                    resultStatus = rawResult.get(key);
                } else if (TextUtils.equals(key, "result")) {
                    result = rawResult.get(key);
                } else if (TextUtils.equals(key, "memo")) {
                    memo = rawResult.get(key);
                }
            }
        }

        @Override
        public String toString() {
            return "resultStatus={" + resultStatus + "};memo={" + memo
                    + "};result={" + result + "}";
        }

        */
/**
         * @return the resultStatus
         *//*

        public String getResultStatus() {
            return resultStatus;
        }

        */
/**
         * @return the memo
         *//*

        public String getMemo() {
            return memo;
        }

        */
/**
         * @return the result
         *//*

        public String getResult() {
            return result;
        }
    }

使用方法：

 AlipayUtil.getInstance().pay(this, "请求服务端返回的经过签名的字符串", true, new AlipayUtil.AlipayCallBack() {
            @Override
            public void callBack(AlipayUtil.PayResult resultSet) {

            }
        });

这样子，可以得到PayResult，根据这个PayResult处理支付结果。