参考代码 - APP拉起支付宝

示例代码:

package com.alipay.sdk.pay.demo;

import com.alipay.sdk.app.PayTask;
import com.alipay.sdk.util.H5PayResultModel;
import com.alipay.sdk.app.H5PayCallback;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.res.Configuration;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.webkit.CookieManager;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;


public class H5PayDemoActivity extends Activity {

    private WebView mWebView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle extras = null;
        try {
            extras = getIntent().getExtras();
        } catch (Exception e) {
            finish();
            return;
        }
        if (extras == null) {
            finish();
            return;
        }
        // 获取传入的付费界面URL
        String url = null;
        try {
            url = extras.getString("url");
        } catch (Exception e) {
            finish();
            return;
        }
        if (TextUtils.isEmpty(url)) {
            // 测试H5支付，必须设置要打开的url网站
            new AlertDialog.Builder(H5PayDemoActivity.this).setTitle(R.string.error)
                    .setMessage(R.string.error_missing_h5_pay_url)
                    .setPositiveButton(R.string.confirm, new OnClickListener() {

                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {
                            finish();
                        }
                    }).show();

        }
        super.requestWindowFeature(Window.FEATURE_NO_TITLE);
        LinearLayout layout = new LinearLayout(getApplicationContext());
        LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
        layout.setOrientation(LinearLayout.VERTICAL);
        setContentView(layout, params);

        // 此处使用 this 才能正常展示 webview 内的下拉选择元素
        mWebView = new WebView(this);
        params.weight = 1;
        mWebView.setVisibility(View.VISIBLE);
        layout.addView(mWebView, params);

        WebSettings settings = mWebView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setJavaScriptCanOpenWindowsAutomatically(true);

        // 启用二方/三方 Cookie 存储和 DOM Storage
        // 注意：若要在实际 App 中使用，请先了解相关设置项细节。
        CookieManager.getInstance().setAcceptCookie(true);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            CookieManager.getInstance().setAcceptThirdPartyCookies(mWebView, true);
        }
        settings.setDomStorageEnabled(true);

        mWebView.setVerticalScrollbarOverlay(true);
        mWebView.setWebViewClient(new MyWebViewClient());
        mWebView.loadUrl(url);

        // 启用 WebView 调试模式。
        // 注意：请勿在实际 App 中打开！
        WebView.setWebContentsDebuggingEnabled(true);
    }

    @Override
    public void onBackPressed() {
        if (mWebView.canGoBack()) {
            mWebView.goBack();
        } else {
            finish();
        }
    }

    @Override
    public void finish() {
        super.finish();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    private class MyWebViewClient extends WebViewClient {

        @Override
        public boolean shouldOverrideUrlLoading(final WebView view, WebResourceRequest request) {
            String url = request.getUrl().toString();
            Log.i("UrlLoading", url);
            if (!(url.startsWith("http") || url.startsWith("https"))) {
                return true;
            }

            /**
             * 推荐采用的新的二合一接口(payInterceptorWithUrl),只需调用一次
             */
            final PayTask task = new PayTask(H5PayDemoActivity.this);
            boolean isIntercepted = task.payInterceptorWithUrl(url, true, new H5PayCallback() {
                @Override
                public void onPayResult(final H5PayResultModel result) {
                    final String url = result.getReturnUrl();
                    if (!TextUtils.isEmpty(url)) {
                        H5PayDemoActivity.this.runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                view.loadUrl(url);
                            }
                        });
                    }
                }
            });

            /**
             * 判断是否成功拦截
             * 若成功拦截，则无需继续加载该URL；否则继续加载
             */
            if (isIntercepted) {
                return true;
            }

            // 支付宝H5转App处理之后，处理艺爪付费的App支付请求
            String EZREVENUE_BRIDGE_ALIPAY = "1002";
            String EZREVENUE_URL1 = "https://revenue.ezboti.com";
            String EZREVENUE_URL2 = "https://revenue.ezfuns.com";  //备用域名
            if (url.startsWith(EZREVENUE_URL1 + "/paywall/bridge/") || url.startsWith(EZREVENUE_URL2 + "/paywall/bridge/")) {
                Log.i("PaywallBridge", url);
                Uri urlObj = request.getUrl();
                // 检查是否是拉起支付宝，以后也可以根据bridgeType判断拉起微信等
                String bridgeType = urlObj.getQueryParameter("type");
                if (EZREVENUE_BRIDGE_ALIPAY.equals((bridgeType))) {
                    final String orderString = urlObj.getQueryParameter("order_string");
                    final String callbackUrl = urlObj.getQueryParameter("callback_url");
                    Log.i("PaywallBridge", "Alipay orderString=" + orderString + " callbackUrl=" + callbackUrl);
                    // 拉起支付宝APP
                    final PayTask appPayTask = new PayTask(H5PayDemoActivity.this);
                    Runnable payRunnable = new Runnable() {
                        @Override
                        public void run() {
                            try {
                                String result = appPayTask.pay(orderString, true);
                                Log.i("PaywallBridge", "Alipay result: " + result);
                            } catch (Exception ex) {
                                Log.e("PaywallBridge Error", ex.toString());
                            }
                            H5PayDemoActivity.this.runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    view.loadUrl(callbackUrl);
                                }
                            });
                        }
                    };
                    // 必须异步调用
                    Thread payThread = new Thread(payRunnable);
                    payThread.start();
                    return true;
                }
            }
            return false;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mWebView != null) {
            mWebView.removeAllViews();
            try {
                mWebView.destroy();
            } catch (Throwable t) {
            }
            mWebView = null;
        }
    }
}

源码参考 支付宝官方 - App支付客户端DEMO，可 联系我 获取完整 Android 示例项目代码。