html - 使用cordova-2.9.0在Android中无法下载文件

Question

我正在开发一个混合应用程序，使用 HTML5 锚下载属性从服务器下载 pdf 文件似乎非常简单，并且在桌面浏览器上使用以下代码完全符合预期。

<a href="/path/sample.pdf" download="Test.pdf">Download</a>

挑战：但是当我尝试在我的 Hybird 应用程序中运行相同的代码时，使用 cordova 2.9.0 在移动设备上调试应用程序时；点击下载什么都没有显示并且下载没有开始。

我在这里错过了一些非常基本的东西吗？

请建议。

Answer 1

此代码适用于 Android 平台。首先，[appname].java在您的平台文件夹中打开该文件： appname\platforms\android\src\com\[appname]\app 接下来，为 webview 设置 downloadListener，紧随其后super.init();

这是完整的代码：

package com.[appname].app;

import android.os.Bundle;
import org.apache.cordova.*;

public class [appname] extends CordovaActivity 
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        super.init();   

        super.appView.setDownloadListener(new android.webkit.DownloadListener() {

            public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {

                android.util.Log.d("Logger","url : " + url  + " userAgent: " + userAgent + " contentDisposition: " + contentDisposition + " mimeType: " + mimetype + " contentLength " + contentLength);                        

                android.net.Uri source = android.net.Uri.parse(url);

                // Make a new request
                android.app.DownloadManager.Request request = new android.app.DownloadManager.Request(source);

                // appears the same in Notification bar while downloading               
                String filename = getFilename(contentDisposition);

                request.setDescription("This file will be saved in your downloads folder.");
                request.setTitle(filename);

                //add cookie on request header (for authenticated web app)
                String cookieContent = getCookieFromAppCookieManager(source.getHost());             
                request.addRequestHeader("Cookie", cookieContent);

                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.HONEYCOMB) {
                    request.allowScanningByMediaScanner();
                    request.setNotificationVisibility(android.app.DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                }

                // save the file in the "Downloads" folder of SDCARD
                request.setDestinationInExternalPublicDir(android.os.Environment.DIRECTORY_DOWNLOADS, filename); 

                // get download service and enqueue file
                android.app.DownloadManager manager = (android.app.DownloadManager) getSystemService(android.content.Context.DOWNLOAD_SERVICE);

                manager.enqueue(request);
            }
        });

        super.loadUrl(Config.getStartUrl());
        //super.loadUrl("file:///android_asset/www/index.html");
    };

    public String getFilename(String contentDisposition){
        String filename[] = contentDisposition.split("filename=");
        return filename[1].replace("filename=", "").replace("\"", "").trim();
    };

    public String getCookieFromAppCookieManager(String url){
        android.webkit.CookieManager cookieManager = android.webkit.CookieManager.getInstance();
        if (cookieManager == null)
            return null;
        String rawCookieHeader = null;

        // Extract Set-Cookie header value from Android app CookieManager for this URL
        rawCookieHeader = cookieManager.getCookie(url);
        if (rawCookieHeader == null)
            return null;

        return rawCookieHeader;
    };

}