android經過webview調起支付寶app支付

webview在加載網頁的時候會默認調起手機自帶的瀏覽器加載網頁,用戶體驗很差。但當用戶設置瀏覽器客戶端(setWebViewClient)設置這樣的監聽事件以後,當請求url的時候就不會打開手機自帶的瀏覽器。android

webview.setWebViewClient(new WebViewClient() {

            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
                LoadingDialog.closeDialog();
            }

        });

在此方法中能夠監聽瀏覽器開始加載網頁和加載網頁結束。git

今天着重講的並非上邊的兩個方法而是下面的這位github

putinmoney_webview.setWebViewClient(new WebViewClient() {
                        @Override
                        public boolean shouldOverrideUrlLoading(WebView view, String url) {
} });

shouldOverrideUrlLoading並非每次都在onPageStarted以前開始調用的,只有在調用webview.loadURL的時候纔會調用。web

webview.loadUrl("https://qr.alipay.com/bax05351pgjhc4yegd2y2084");

但發起請求的時候後,webview的連續動做是前後請求兩個urlapi

1.https://mobilecodec.alipay.com/client_download.htm?qrcode=bax05351pgjhc4yegd2y2084瀏覽器

2.https://ds.alipay.com/from=mobilecodec&scheme=alipayqr%3A%2F%2Fplatformapi%2Fstartapp%3FsaId%3D10000007%26clientVersion%3D3.7.0.0718%26qrcode%3Dhttps%253A%252F%252Fqr.alipay.com%252Fbax05351pgjhc4yegd2y2084%253F_s%253Dweb-otherapp

以後返回一個意圖,也是用這個意圖來打開支付寶appide

intent://platformapi/startapp?saId=10000007&clientVersion=3.7.0.0718&qrcode=https%3A%2F%2Fqr.alipay.com%2Fbax05351pgjhc4yegd2y2084%3F_s%3Dwebother&_t=1474448799004#Intent;scheme=alipayqr;package=com.eg.android.AlipayGphone;endpost

 

webview.setWebViewClient(new WebViewClient(){
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                // TODO Auto-generated method stub
                super.onPageStarted(view, url, favicon);
            }
            
            @Override
            public void onPageFinished(WebView view, String url) {
                // TODO Auto-generated method stub
                super.onPageFinished(view, url);
            }
            
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                Log.e(TAG, "訪問的url地址:" + url);
                if (parseScheme(url)) {
                    try {
                        Uri uri = Uri.parse(url);
                        Intent intent;
                        intent = Intent.parseUri(url,
                                Intent.URI_INTENT_SCHEME);
                        intent.addCategory("android.intent.category.BROWSABLE");
                        intent.setComponent(null);
                        // intent.setSelector(null);
                        startActivity(intent);

                    } catch (Exception e) {

                    }
                } else {
                    view.loadUrl(url);
                }

                return true;

            }
            
        });
關於"android.intent.category.BROWSABLE"參考:

http://blog.csdn.net/gf771115/article/details/7827833ui

此外要對webview設置下:

WebSettings webSettings = webview.getSettings();
webSettings.setJavaScriptEnabled(true);
// 設置能夠訪問文件
webSettings.setAllowFileAccess(true);
// 設置支持縮放
webSettings.setBuiltInZoomControls(true);
webSettings.setCacheMode(WebSettings.LOAD_NO_CACHE);
// webSettings.setDatabaseEnabled(true);

// 使用localStorage則必須打開
webSettings.setDomStorageEnabled(true);

webSettings.setGeolocationEnabled(true);

 

實例下載地址:https://github.com/reachchen/loadurltoali.git

 

在項目中發現的問題在此修正:

發現一些手機(例如一些升級了7.0的手機)在請求後並無返回intent,因此就會出現調不起支付寶的狀況。可是用瀏覽器直接打開是能夠的

兼容的思路以下:

新建一個線程,在用戶發出請求後,若是10秒的時間沒有收到調起的intent,就用瀏覽器直接調起。

代碼以下:

    public boolean parseScheme(String url) {
        
        if (url.contains("platformapi/startapp")){
            myHandler.removeCallbacks(runable);
            return true;
        } else if(url.contains("web-other")){
            
            myHandler.postDelayed(runable, 10000);
            return false;
        }else {
            return false;
        }
    }

新建的線程

    myHandler = new Handler();
        
        runable = new Runnable() {
            
            @Override
            public void run() {
                // TODO Auto-generated method stub
                LoadingDialog.closeDialog();
                webview_another.loadUrl(myaliWebUrl.get("code_url"));
            }
        };
    }
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