Paypal支付（三）Express Checkout EC WebView快捷支付之改进版

一、前导

上一篇讲的不是很好，这里再重新讲一下。

Paypal手机支付有2种形式：

1.Mobile Express Checkout，MEC，快捷支付

2.MPL

如果采用MEC支付方式，这种方式点击Checkout按钮之后的页面一直到付款结束都是url的形式，必须先有Web站点的支付，所以只能通过WebView的形式进行记载,使用起来和Web站点效果一样,如果加载的页面中有些内容不想显示，可以隐藏。

二、MEC支付案例

package com.sound.chinabuye.activity;import http.HttpUrls;import java.util.List;import org.apache.http.cookie.Cookie;import tool.NewTokenCallBack;import tool.TokenTools;import tool.UserInfo;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.app.ProgressDialog;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Bitmap;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.webkit.CookieManager;import android.webkit.CookieSyncManager;import android.webkit.JsResult;import android.webkit.WebChromeClient;import android.webkit.WebSettings;import android.webkit.WebView;import android.webkit.WebViewClient;import android.widget.Toast;import com.sound.chinabuye.R;import com.sound.chinabuye.bean.BroadAction;public class CheckoutActivity2 extends Activity {public static final String TAG = "CheckoutActivity2";private WebView webView;private List<Cookie> cookies;private ProgressDialog dialog;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);manageActivity();webView = new WebView(this);webView.setWebViewClient(new MyWebViewClient());webView.setWebChromeClient(new MyChromeClient());WebSettings webSettings = webView.getSettings();webSettings.setJavaScriptEnabled(true);webSettings.setUseWideViewPort(false);webSettings.setSupportZoom(false);setContentView(webView);dialog = new ProgressDialog(this);dialog.setMessage(getString(R.string.loading));dialog.setCancelable(false);// 请求获得cookiesrequestData();}private void requestData() {TokenTools.requestNewToken(CheckoutActivity2.this, new NewTokenCallBack() {@Overridepublic void getNewTokenSuccess(String newAccessToken) {if (newAccessToken != null) {String customerid = UserInfo.getUserInfoInstance().getUserid();String url = "http://www.chinabuye.com/service/product/listcartweb" + "?productid=64396&qty=1&customerid=" + customerid + "&ACCESSTOKEN=" + newAccessToken;webView.loadUrl(url);}}});}@Overrideprotected void onDestroy() {super.onDestroy();CookieSyncManager.createInstance(CheckoutActivity2.this);CookieManager cookieManager = CookieManager.getInstance();cookieManager.removeAllCookie();CookieSyncManager.getInstance().sync();}private void setCookiesVia2Url(String fromUrl, String toUrl) {CookieSyncManager.createInstance(CheckoutActivity2.this);CookieManager cookieManager = CookieManager.getInstance();String value = cookieManager.getCookie(fromUrl);cookieManager.setCookie(toUrl, value);CookieSyncManager.getInstance().sync();}private void manageActivity() {ActivityInstanceManager.getActivityInstanceManager().addActivity(this);}private class MyWebViewClient extends WebViewClient {private String currentUrl;@Overridepublic void onPageStarted(WebView view, String url, Bitmap favicon) {Log.e(TAG, "start:" + url);currentUrl = url;// 开始跳转Paypal登录界面if (url.contains("http://www.chinabuye.com/service/product/listcartweb")) {dialog.show();}// 开始加载Place Order，包含从其他页面返回的情况和开始提交订单的情况if (url.contains("http://www.chinabuye.com/m/paypal/express/saveOrder") || url.contains("PayerID") || url.contains("http://www.chinabuye.com/m/paypal/express/review")) {if (dialog.isShowing()) {dialog.dismiss();}dialog.show();}// 开始加载 下单成功的界面if (url.contains("http://www.chinabuye.com/m/checkout/onepage/success")) {dialog.show();}super.onPageStarted(view, url, favicon);}@Overridepublic boolean shouldOverrideUrlLoading(WebView view, String url) {Log.e(TAG, "load:" + url);/** 这里不做任何拦截操作 ***/// view.loadUrl(url);// return true;return super.shouldOverrideUrlLoading(view, url);}@Overridepublic void onPageFinished(WebView view, String url) {Log.e(TAG, "finish:" + url);if (url.contains("customerid")) {String url2 = "http://www.chinabuye.com/m/checkout/cart";// 这个直接使用Web购物车，测试没问题String url3 = "http://www.chinabuye.com/paypal/express/shortcut";// 这个直接拦截到登录界面，暂时没发现问题setCookiesVia2Url(url, url3);view.loadUrl(url3);}// paypal登录界面加载完毕if (url.contains("https://www.paypal.com/au/cgi-bin/webscr") && url.contains("#m")) {dialog.dismiss();}// Place Order界面加载完毕if (url.contains("http://www.chinabuye.com/m/paypal/express/review")) {// 尽管在这之前已经进行了隐藏操作，但是偶尔还是会出现没有隐藏的情况，这里重新加载一次hidePlaceOrderJS(view);dialog.dismiss();}// 下单成功的界面加载完毕if (url.contains("http://www.chinabuye.com/m/checkout/onepage/success")) {// 尽管在这之前已经进行了隐藏操作，但是偶尔还是会出现没有隐藏的情况，这里重新加载一次hideSaveOrderJS(view);dialog.dismiss();// 发送广播,清空购物车Intent intent = new Intent();intent.setAction(BroadAction.EMPTY);CheckoutActivity2.this.sendBroadcast(intent);Log.e("sendbroad", "buy.success");}// 用户邮箱信息为空if (url.contains("http://www.chinabuye.com/m/customer/account/edit")) {Toast.makeText(CheckoutActivity2.this, "Invalid email address NULL", 0).show();}super.onPageFinished(view, url);}// 处理在浏览器中的按键事件@Overridepublic boolean shouldOverrideKeyEvent(WebView view, KeyEvent event) {if (event.equals(KeyEvent.KEYCODE_BACK) && view.canGoBack()) {view.goBack();return true;} else if (event.equals(KeyEvent.KEYCODE_BACK)) {CheckoutActivity2.this.finish();return true;}return super.shouldOverrideKeyEvent(view, event);}// 加载页面资源时会调用，比如加载图片时，每加载一张图片会调用一次@Overridepublic void onLoadResource(WebView view, String url) {// Log.e(TAG, "loadResource:" + url);// Web购物车if (currentUrl.contains("http://www.chinabuye.com/m/checkout/cart")) {hideMCartJS(view);}// Place Orderif (currentUrl.contains("http://www.chinabuye.com/m/paypal/express/review")) {hidePlaceOrderJS(view);}// 下单成功的页面if (currentUrl.contains("http://www.chinabuye.com/m/checkout/onepage/success")) {hideSaveOrderJS(view);}// 修改地址的时候，最先调用的是该方法，为了体验好，这里先显示对话框if (url.contains("http://www.chinabuye.com/m/paypal/express/ajaxEditAddress")) {dialog.show();}super.onLoadResource(view, url);}}// 隐藏M Cart界面的头部和底部private void hideMCartJS(WebView view) {view.loadUrl("javascript:window.handler.show(document.getElementById('topheader').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('footer').style.display='none');");}// 隐藏Place Order界面private void hidePlaceOrderJS(WebView view) {// 隐藏用户和logo信息view.loadUrl("javascript:window.handler.show(document.getElementById('topheader').style.display='none');");// 隐藏placeorder之后view.loadUrl("javascript:window.handler.show(document.getElementById('iph_menu').style.display='none');");// 隐藏最底部联系我们等信息view.loadUrl("javascript:window.handler.show(document.getElementById('footer').style.display='none');");// 隐藏Review Review Order和Shipping Reminders信息view.loadUrl("javascript:window.handler.show(document.getElementById('paypal_page_head').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('paypal_important').style.display='none');");// 细节隐藏// view.loadUrl("javascript:window.handler.show(document.getElementById('paypal_change_shipping_address').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('paypal_change_payment_method').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('paypal_edit_shopping_cart').style.display='none');");}// 隐藏Save Order界面private void hideSaveOrderJS(WebView view) {view.loadUrl("javascript:window.handler.show(document.getElementById('topheader').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('footer').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementById('iph_menu').style.display='none');");view.loadUrl("javascript:window.handler.show(document.getElementsByClassName('button-set')[0].style.display='none');");}private class MyChromeClient extends WebChromeClient {// 处理javascript中的confirm，确认// 登录界面有该对话框// 继续页面有该对话框@Overridepublic boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {Builder builder = new Builder(CheckoutActivity2.this);builder.setTitle("Confirm Dialog");builder.setMessage("Cancle the purchase and return to the ShoppingCart");Log.e(TAG, "Mesage:" + message);Log.e(TAG, "JsResult:" + result.toString());builder.setPositiveButton(R.string.ok, new AlertDialog.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// result.confirm();// 拦截确定按钮Intent intent = new Intent(CheckoutActivity2.this, CartActivity.class);startActivity(intent);finish();}});builder.setNegativeButton(R.string.cancel, new AlertDialog.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// 拦截取消按钮result.cancel();}});builder.setCancelable(false);builder.create();builder.show();return true;}}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode == KeyEvent.KEYCODE_BACK){//这样会出现很多奇怪的问题，还是直接结束//if(webView.canGoBack()){//webView.goBack();//}else{//CheckoutActivity2.this.finish();//}CheckoutActivity2.this.finish();return true;}return super.onKeyDown(keyCode, event);}}

上面这个案例是我在app中实际使用到的，没有发现有什么问题。做MEC支付，主要思想是过滤URL，进行对话框的显示和消失、页面隐藏操作等，中间涉及JS。