Is there any way to show Excel file in my application? Like if you want to show webpage you will use Webview. Or the only way is open another app by Intent?
Yes, after a fashion. You can use jexcelapi, a java library to read/write Excel files. I've used this in one of my apps to import and export data using spreadsheets. It was a classroom app, and all the data had to end up in spreadsheets for the school anyway.
You'll have to put the data into your app via TextView or WebView or some other method as you can't simply run excel on your Android device without an office file reader. Not all phones have those.
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Faced a number of problems opening documents in a mobile application. We have 2 types of PDF and DOCX documents available.
There are no packages to open Docx for react native.
In order to open a pdf, you need to have the base64 of that document. The back-end does not give back, and in order for the mobile application to create it itself, you need to fasten a heavy package.
Two types of documents can be opened in webview, but only viewing without saving will be available there, and then, this will only work on ios, android immediately starts downloading documents without viewing.
You can use the google.docs service to view documents, but you won't be able to open the document without cookies. Our back-end doesn't let the google.docs robot (for obvious reasons) download the document and display it to us.
I have an app which contains html files which i am displaying using a webview. This html files are nothing but documentation the users of my app require. My question is, can I update these html files without asking the user to update the entire app? I dont want to replace these html files by hosting the documentaion online.
You will have to do one of these:
Update your app (which is what you don't want)
Host the raw .html files on a web server, and whenever the user opens the app, check if there are new files available and download them.
Simply create a website that shows the .html files and open the
website in your app (which i'm guessing is what you don't want
either)
So you're left with option 2.
To update files without requiring an app update, you will need the app to obtain the HTML content online.
One option, which you mentioned you don't want, is loading a URL into the WebView rather than local HTML files.
The other option would involve hosting the web pages somewhere and the app would download them. The only benefit of this I can see, is that if the device is offline is can use the last obtained HTML file. You could just use caching to achieve this though.
How complicated are the webpages? Using JSON is another method.
We are working on an android app that generates PDFs based on app contents on users' request. We are providing an option to launch an email agent and attach the generate PDF, but we also want the user be able to view the document later at any time. On android, there are no stock file explorer, so our first thought was to show on the stock Downloads app's file list. We've tried the following two methods but without luck.
We firstly tried to save the PDF to the default download folder (given by calling Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)) and invoke media scanner, but the file doesn't show up in the Downloads app's list. It's shown in Adobe Acrobat's local document list though.
After some research, it seems that the Downloads app would only show files that downloaded though DownloadManager, so we tried to generate the PDF in a temporary directory and call DownloadManager to download it, but, somehow expected, it complains that we can only download via HTTP(S), so this approach isn't working as well.
Is there any other solution?
well if you have to provide access to the document without any file explorer app, i think your approach is correct it to allow to store it in the Download lists. To achive this you can use Nanohttpd in your application to host your pdf document and then invoke the DownloadManager download action using HTTP(S) to your webapp (you will have to create a small webapp to handle the download request) hosted on localhost server.
We need to be able to import Office documents as images into an app. On Windows we use LibreOffice which has a command line --convert flag.
Now we need to do the same for Android and iOS.
LibreOffice is not ready for Android yet.
Open Office for Android (AdrOpen Office) is there, but it does not have the --convert line option
One possibility I am looking at is to use JodConverter, but the solution needs to work offline - my reading of JodConverter is that it "uses openeoffice.org", and I'm not if this means it accesses the web site when doing the conversion, or it simply requires some software components from openoffice.org to be installed locally.
Note I am not asking how to open the documents, but how to convert them to an image, which we then import as a background in our app. We do not need to "live edit" them.
you can use PDF2JPG app to convert PDF to jpg. This app is available on google playstore freely. for doc to jpg conversion , you need to use the combination of two apps. First you need to use Doc To Pdf app from playstore for convert it to PDF, which is freely available on google playstore then convert PDF to jpg.
I have a cloud storage website and I want to create an Android application for that website.
I tried 2 methods.
First Method
Using Phonegap to open a remote website which handles everything and its built-in PHP so everything works fine. But a Cloud Storage app must allow uploading and downloading. In Phonegap I can upload through the website but can't download directly to local storage. It can only be done locally if my website is in the local www folder. Also in this way API of Phonegap can't be used either. If I download any file the browser opens up, in this case.
Second Method:
I tried to use Phonegap locally and just create an API of my cloud storage website so that locally with the help of jQuery ,Ajax so that I can post data to the remote URL, but that can't be done due to the Same Origin policy. I may receive the JSON data of files and show but can't log the user in and other features. :( Again a problem.
What else can I do? Is there any other method or solution you can provide me regarding these two methods or any alternative method I can use?
Depending on the kinds of data you're talking about there are several alternatives.
You're describing a cloud storage app (I'm assuming like drop box or Google drive right).
Therefore you'll want to write to the file system instead of some kind of database (locally ofc)
I would therefore check out the following api docs;
http://docs.phonegap.com/en/2.1.0/cordova_file_file.md.html#File
Examples are there too.
PS ive had same origin problems in development, but they seem to go away in production, try testing there too.