标签：android blog http java 使用 os io 文件
出处：http://my.oschina.net/u/1011854/blog/169434 再次 谢谢作者！
在开发web app并且使用phonegap的情况下，附件下载着实是一件令人头疼的事，什么window.open或者window.location.href在webview中都不起作用，网上查了许久，没有一篇完整讲述“phonegap附件下载及打开附件”的例子，现在分享一下。 首先，如果你可以接受的话，可以使用一种极其简单的方式来完成，点击操作之后，跳入手机默认浏览器进行下载，代码如下
navigator.app.loadUrl(encodeURI(url), { openExternal:true});
注意，参数一定要加{ openExternal:true}参数，这个参数代表在另外的浏览器打开。
如果你不满足于这种方式，可以使用以下方法：
phonegap附件下载，使用的方法是phonegap自带的下载附件的方式，而打开附件用到的是phonegap插件，最终由安卓原生代码来完成，不多说，代码如下：
1. html文件（cordova.js是phonegap的库文件）
<html>
<head>
<meta charset="UTF-8">
<title>phonegap文件下载</title>
<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript">
window.appRootDirName = "download_test";
document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
console.log("device is ready");
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");
}
downloadFile = function(){
alert("start");
var fileTransfer = new FileTransfer();
var uri = encodeURI("http://12.130.30.22:8080/uploadImagetest.xls");
var filePath = window.appRootDir.fullPath + "/test.xls";
alert(window.appRootDir.fullPath);
fileTransfer.download(
uri,
filePath,
function(entry) {
alert("success");
alert(entry.fullPath);
//此处调用打开文件方法
OpenFile(entry.fullPath);
//window.location.href = window.appRootDir.fullPath;
console.log("download complete: " + entry.fullPath);
},
function(error) {
alert("error");
alert(JSON.stringify(error));
console.log("download error source " + error.source);
console.log("download error target " + error.target);
console.log("upload error code" + error.code);
}
);
}
function OpenFile(path){
try {
alert(‘OpenFile‘);
var array = [];
array[0] = path;
alert(array[0]);
cordova.exec(function(message) {
}, null, ‘OpenFilePlugin‘, ‘haha‘, array);
} catch(e) {
alert(e.message);
}
}
</script>
</head>
<body>
<a href="#" onclick="downloadFile()">Download File</a>
</body>
</html>
2. java文件
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import org.apache.cordova.api.CallbackContext;
import org.apache.cordova.api.CordovaPlugin;
import org.apache.cordova.api.PluginResult;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.util.Log;
public class OpenFilePlugin extends CordovaPlugin {
@Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) {
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
//doc
if(lastThree.equals("doc") || lastFour.equals("docx")){
Intent i = this.getWordFileIntent(path);
context.startActivity(i);
}
//excel
else if(lastThree.equals("xls") || lastFour.equals("xlsx")){
Intent i = this. getExcelFileIntent(path);
context.startActivity(i);
}
//ppt
else if(lastThree.equals("ppt") || lastFour.equals("pptx")){
Intent i = this. getPptFileIntent(path);
context.startActivity(i);
}
//pdf
else 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, false);
context.startActivity(i);
}
//html
else if(lastThree.equals("htm") || lastFour.equals("html")){
Intent i = this.getHtmlFileIntent(path);
context.startActivity(i);
}
//chm
else 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 block
e.printStackTrace();
}
return true;
}
//android获取一个用于打开Excel文件的intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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intent
public 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;
}
}
3. config.xml
<plugins>
<plugin name="OpenFilePlugin" value="yourPackage.OpenFilePlugin"/>
</plugins>
大功告成！
phonegap 附件下载及打开附件,布布扣,bubuko.com
标签：android blog http java 使用 os io 文件
原文地址：http://www.cnblogs.com/daqiang5566/p/3890557.html
