phonegap下载文件并打开

这里分为两部分：1、用phonegap下载文件到移动设备；2、下载到移动设备的文件在WEB端通过Phonegap打开。

首先，对于第一部分，可以通过已有的FileTransfer来实现，也可以自己写插件实现文件下载，这里我采用现成的，毕竟官方的代码写的相对比较完善；第二部分则需要自己实现打开文件的插件了，因为没有提供现成可用的。

OK！Let's Start!

html中引用的javascript代码如下：

            window.appRootDirName = "download"; //定义文件下载后的存放目录            document.addEventListener("deviceready", onDeviceReady, false); function onDeviceReady() {console.log("device is ready");window.requestFileSystem  = window.requestFileSystem || window.webkitRequestFileSystem;window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, gotFS, fail);} function fail() {console.log("failed to get filesystem");} function gotFS(fileSystem) {console.log("filesystem got");window.fileSystem = fileSystem;fileSystem.root.getDirectory(window.appRootDirName, {create : true,exclusive : false}, dirReady, fail);} function dirReady(entry) {window.appRootDir = entry;console.log("application dir is ready");}//下载文件function download(path,fileName){ var fileTransfer = new FileTransfer();var uri = encodeURI(path);var fileURL = "/mnt/sdcard/download/"+fileName;fileTransfer.onprogress = showUploadingProgress;navigator.notification.progressStart("", "当前下载进度");fileTransfer.download(    uri,    fileURL,    function(entry) {        console.log("download complete: " + entry.fullPath);         navigator.notification.progressStop();         alert("下载成功，文件位置："+ entry.fullPath);if (!confirm("是否打开文件？")) {            window.event.returnValue = false;        }else{ OpenFile(entry.fullPath);}    },    function(error) {        console.log("download error source " + error.source);        console.log("download error target " + error.target);        console.log("upload error code" + error.code);navigator.notification.progressStop(); alert("下载文件错误！");      },    false,    {        headers: {            "Authorization": "Basic dGVzdHVzZXJuYW1lOnRlc3RwYXNzd29yZA=="        }    });}         // 显示上传进度function showUploadingProgress(progressEvt) {if (progressEvt.lengthComputable) {navigator.notification.progressValue(Math.round((progressEvt.loaded / progressEvt.total) * 100));}}//打开文件 function OpenFile(path){          //   alert('OpenFile'); var openFilePlugin=cordova.require('com.gzx.open.OpenFile');openFilePlugin.openFile("/mnt/sdcard"+path, {},     function (result) {      alert(result);                 }, function (error) {            alert("打开文件错误！");              });    } 

下面是，需要引入的打开文件的js，openFile.js

 cordova.define('com.gzx.hello.OpenFile', function(require, exports, module){var exec = require("cordova/exec");/** * Constructor. *  */function OpenFilePllugin() {    };OpenFilePllugin.prototype.openFile = function (fileUrl, params,successCallback, errorCallback) {alert("gafdfa");    if (errorCallback == null)     {        errorCallback = function (){        };    }    if (typeof errorCallback != "function") {    console.log("OpenFilePllugin failure: failure parameter not a function");    return;}if (typeof successCallback != "function"){    console.log("OpenFilePllugin  failure: success callback parameter must be a function");    return;}if (!errorCallback)  successCallback = params;exec(successCallback, errorCallback, 'OpenFile', 'openFile',[fileUrl, params]); };var openFilePllugin = new OpenFilePllugin();module.exports = openFilePllugin;    });

对应的实现类OpenFile.java，如下：

package com.gzx.hello;import java.io.File;import org.apache.cordova.CallbackContext;import org.apache.cordova.CordovaPlugin;import org.json.JSONArray;import org.json.JSONException;import android.content.Context;import android.content.Intent;import android.net.Uri;public class OpenFile extends CordovaPlugin {/* * (non-Javadoc) *  * @see org.apache.cordova.CordovaPlugin#execute(java.lang.String, * org.json.JSONArray, org.apache.cordova.CallbackContext) */@Overridepublic boolean execute(String action, JSONArray args,CallbackContext callbackContext) throws JSONException {try {Context context = cordova.getActivity().getApplicationContext();// 文件路径String path = args.getString(0).toLowerCase();int len = path.length();String lastThree = path.substring(len - 3, len);String lastFour = path.substring(len - 4, len);// 判断文件类型// docif (lastThree.equals("doc") || lastFour.equals("docx")) {Intent i = this.getWordFileIntent(path);context.startActivity(i);}// excelelse if (lastThree.equals("xls") || lastFour.equals("xlsx")) {Intent i = this.getExcelFileIntent(path);context.startActivity(i);}// pptelse if (lastThree.equals("ppt") || lastFour.equals("pptx")) {Intent i = this.getPptFileIntent(path);context.startActivity(i);}// pdfelse if (lastThree.equals("pdf")) {Intent i = this.getPdfFileIntent(path);context.startActivity(i);}// 图片else if (lastThree.equals("jpg") || lastThree.equals("png")|| lastThree.equals("gif") || lastThree.equals("bmp")|| lastFour.equals("jpeg")) {Intent i = this.getImageFileIntent(path);context.startActivity(i);}// 文本else if (lastThree.equals("txt")) {Intent i = this.getTextFileIntent(path, true);context.startActivity(i);}// htmlelse if (lastThree.equals("htm") || lastFour.equals("html")) {Intent i = this.getHtmlFileIntent(path);context.startActivity(i);}// chmelse if (lastThree.equals("chm")) {Intent i = this.getChmFileIntent(path);context.startActivity(i);}// 音频else if (lastThree.equals("mp3") || lastThree.equals("wav")|| lastThree.equals("wma") || lastThree.equals("ogg")|| lastThree.equals("ape") || lastThree.equals("acc")) {Intent i = this.getAudioFileIntent(path);context.startActivity(i);}// 视频else if (lastThree.equals("avi") || lastThree.equals("mov")|| lastThree.equals("asf") || lastThree.equals("wmv")|| lastThree.equals("navi") || lastThree.equals("3gp")|| lastThree.equals("ram") || lastThree.equals("mkv")|| lastThree.equals("flv") || lastThree.equals("mp4")|| lastFour.equals("rmvb") || lastThree.equals("mpg")) {Intent i = this.getVideoFileIntent(path);context.startActivity(i);} else {callbackContext.success("无法打开该文件！");}//Intent i = getExcelFileIntent(path);//context.startActivity(i);} catch (JSONException e) {// TODO Auto-generated catch blocke.printStackTrace();}return true;}// android获取一个用于打开Excel文件的intentpublic static Intent getExcelFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "application/vnd.ms-excel");return intent;}// android获取一个用于打开HTML文件的intentpublic static Intent getHtmlFileIntent(String param) {Uri uri = Uri.parse(param).buildUpon().encodedAuthority("com.android.htmlfileprovider").scheme("content").encodedPath(param).build();Intent intent = new Intent("android.intent.action.VIEW");intent.setDataAndType(uri, "text/html");return intent;}// android获取一个用于打开图片文件的intentpublic static Intent getImageFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "image/*");return intent;}// android获取一个用于打开PDF文件的intentpublic static Intent getPdfFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "application/pdf");return intent;}// android获取一个用于打开文本文件的intentpublic static Intent getTextFileIntent(String param, boolean paramBoolean) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);if (paramBoolean) {Uri uri1 = Uri.parse(param);intent.setDataAndType(uri1, "text/plain");} else {Uri uri2 = Uri.fromFile(new File(param));intent.setDataAndType(uri2, "text/plain");}return intent;}// android获取一个用于打开音频文件的intentpublic static Intent getAudioFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);intent.putExtra("oneshot", 0);intent.putExtra("configchange", 0);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "audio/*");return intent;}// android获取一个用于打开视频文件的intentpublic static Intent getVideoFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);intent.putExtra("oneshot", 0);intent.putExtra("configchange", 0);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "video/*");return intent;}// android获取一个用于打开CHM文件的intentpublic static Intent getChmFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "application/x-chm");return intent;}// android获取一个用于打开Word文件的intentpublic static Intent getWordFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "application/msword");return intent;}// android获取一个用于打开PPT文件的intentpublic static Intent getPptFileIntent(String param) {Intent intent = new Intent("android.intent.action.VIEW");intent.addCategory("android.intent.category.DEFAULT");intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);Uri uri = Uri.fromFile(new File(param));intent.setDataAndType(uri, "application/vnd.ms-powerpoint");return intent;}}

对于，配置文件等操作，请参照之前的博文。