最近我正在为android构建一个应用程序。我正在使用phonegap来做同样的事情。一切运行良好，除了一个问题，即我无法在 android 中使用 jquery 打开 pdf 文件。我已经尝试了很多做同样的事情，但我做不到。
我想要的是，单击图像后，它将从 url 打开一个 pdf。
编辑：
我试过这个：
<img src="img/b_img1.png" onclick="openPdf('http://www.w3.org/2011/web-apps-ws/papers/Nitobi.pdf')"/>
openPdf 函数是这样的：
function openFile(pdfUrl) {
window.plugins.fileOpener.open(pdfUrl);
}
而fileOpener插件就是这样的：
cordova.define("cordova/plugin/fileopener",
function(require, exports, module) {
var exec = require("cordova/exec");
var FileOpener = function() {};
FileOpener.prototype.open = function(url) {
exec(null, null, "FileOpener", "openFile", [url]);
};
var fileOpener = new FileOpener();
module.exports = fileOpener;
});
/**
* Load Plugin
*/
if (!window.plugins) {
window.plugins = {};
}
if (!window.plugins.fileOpener) {
window.plugins.fileOpener = cordova.require("cordova/plugin/fileopener");
}
我在 config.xml 页面中添加了插件，如下所示：
<plugin name="FileOpener" value="com.phonegap.plugins.file.FileOpener"/>
我在 com.phonegap.plugins.file 包中添加了 FileOpener.java，如下所示：
package com.phonegap.plugins.file;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import org.apache.cordova.api.CallbackContext;
import org.apache.cordova.api.CordovaPlugin;
import org.apache.cordova.api.PluginResult;
public class FileOpener extends CordovaPlugin {
private static final String YOU_TUBE = "youtube.com";
private static final String ASSETS = "file:///android_asset/";
public boolean execute(String action, JSONArray args, CallbackContext callbackContext)
{
PluginResult.Status status = PluginResult.Status.OK;
String result = "";
try {
if (action.equals("openFile")) {
openFile(args.getString(0));
}
else {
status = PluginResult.Status.INVALID_ACTION;
}
callbackContext.sendPluginResult(new PluginResult(status, result));
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
private void openFile(String url) throws IOException {
if (url.contains("bit.ly/") || url.contains("goo.gl/") || url.contains("tinyurl.com/") || url.contains("youtu.be/")) {
//support for google / bitly / tinyurl / youtube shortens
URLConnection con = new URL(url).openConnection();
con.connect();
InputStream is = con.getInputStream();
//new redirected url
url = con.getURL().toString();
is.close();
}
// Create URI
Uri uri = Uri.parse(url);
Intent intent = null;
// Check what kind of file you are trying to open, by comparing the url with extensions.
// When the if condition is matched, plugin sets the correct intent (mime) type,
// so Android knew what application to use to open the file
if (url.contains(YOU_TUBE)) {
// If we don't do it this way you don't have the option for youtube
uri = Uri.parse("vnd.youtube:" + uri.getQueryParameter("v"));
if (isYouTubeInstalled()) {
intent = new Intent(Intent.ACTION_VIEW, uri);
} else {
intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("market://details?id=com.google.android.youtube"));
}
} else if(url.contains(ASSETS)) {
// get file path in assets folder
String filepath = url.replace(ASSETS, "");
// get actual filename from path as command to write to internal storage doesn't like folders
String filename = filepath.substring(filepath.lastIndexOf("/")+1, filepath.length());
// Don't copy the file if it already exists
File fp = new File(this.cordova.getActivity().getFilesDir() + "/" + filename);
if (!fp.exists()) {
this.copy(filepath, filename);
}
// change uri to be to the new file in internal storage
uri = Uri.parse("file://" + this.cordova.getActivity().getFilesDir() + "/" + filename);
if (url.contains(".doc") || url.contains(".docx")) {
// Word document
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/msword");
} else if(url.contains(".pdf")) {
// PDF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/pdf");
} else if(url.contains(".ppt") || url.contains(".pptx")) {
// Powerpoint file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
} else if(url.contains(".xls") || url.contains(".xlsx")) {
// Excel file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/vnd.ms-excel");
} else if(url.contains(".rtf")) {
// RTF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/rtf");
} else if(url.contains(".wav")) {
// WAV audio file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "audio/x-wav");
} else if(url.contains(".gif")) {
// GIF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "image/gif");
} else if(url.contains(".jpg") || url.contains(".jpeg")) {
// JPG file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "image/jpeg");
} else if(url.contains(".txt")) {
// Text file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "text/plain");
} else if(url.contains(".mpg") || url.contains(".mpeg") || url.contains(".mpe") || url.contains(".mp4") || url.contains(".avi")) {
// Video files
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "video/*");
}
//if you want you can also define the intent type for any other file
//additionally use else clause below, to manage other unknown extensions
//in this case, Android will show all applications installed on the device
//so you can choose which application to use
else {
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "*/*");
}
}else {
if (url.contains(".doc") || url.contains(".docx")) {
// Word document
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/msword");
} else if(url.contains(".pdf")) {
// PDF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/pdf");
} else if(url.contains(".ppt") || url.contains(".pptx")) {
// Powerpoint file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
} else if(url.contains(".xls") || url.contains(".xlsx")) {
// Excel file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/vnd.ms-excel");
} else if(url.contains(".rtf")) {
// RTF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "application/rtf");
} else if(url.contains(".wav")) {
// WAV audio file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "audio/x-wav");
} else if(url.contains(".gif")) {
// GIF file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "image/gif");
} else if(url.contains(".jpg") || url.contains(".jpeg")) {
// JPG file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "image/jpeg");
} else if(url.contains(".txt")) {
// Text file
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "text/plain");
} else if(url.contains(".mpg") || url.contains(".mpeg") || url.contains(".mpe") || url.contains(".mp4") || url.contains(".avi")) {
// Video files
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "video/*");
}
//if you want you can also define the intent type for any other file
//additionally use else clause below, to manage other unknown extensions
//in this case, Android will show all applications installed on the device
//so you can choose which application to use
else {
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, "*/*");
}
}
this.cordova.getActivity().startActivity(intent);
}
private void copy(String fileFrom, String fileTo) throws IOException {
// get file to be copied from assets
InputStream in = this.cordova.getActivity().getAssets().open(fileFrom);
// get file where copied too, in internal storage.
// must be MODE_WORLD_READABLE or Android can't play it
FileOutputStream out = this.cordova.getActivity().openFileOutput(fileTo, Context.MODE_WORLD_READABLE);
// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0)
out.write(buf, 0, len);
in.close();
out.close();
}
private boolean isYouTubeInstalled() {
PackageManager pm = this.cordova.getActivity().getPackageManager();
try {
pm.getPackageInfo("com.google.android.youtube", PackageManager.GET_ACTIVITIES);
return true;
} catch (PackageManager.NameNotFoundException e) {
return false;
}
}
}
而且我也添加了清单文件的权限。
现在使用我的 fileopener 插件，在更改 file.java 页面后，一切都打开了。（您可以在编辑部分看到）。video, mp3, img 如果存储在本地或全局上，则可以完美打开。如果 pdf 文件存储在 android/asset 文件夹中，那么它会显示给我，但如果它来自网站，那么它会显示错误。
Logcat 在说我：
07-26 15:11:38.105: E/Web Console(21696): Uncaught Error: Error calling method on NPObject. at file:///android_asset/www/js/cordova-2.7.0.js:857
那么任何人都可以帮助我我做错了什么吗？提前致谢。