Develop Reference

Render image using srcset property in React Native

I am having following JSON feed from one of my Wordpress blog, and I would like to render images within the content of the blog as the JSON feed shows.
There is only one image in the feed, however you will notice one tag and within that a few srcset as well. For some reason is giving a relative URL which is no good for me to render an image outside of the Wordpress blog, however I could use the property of tag which is srcset which is providing an absolute path to the image.
Could someone suggest me how I can ignore the src of the tag and rather should be able to use srcset? The platform I am using is React Native.
<p>Can you spare a few minutes to look at some terrible and completely ridiculous life tips? Well then you’ve come to the right place!</p>\n<p>Some of them come from a sub-Reddit called /r/ShittyLifeProTips, and while they won’t actually help you to achieve much, they are at least useful when it comes to making us laugh. From using ketchup as a bookmark, to saving yourself precious time by adding toothpaste to meals, these “pro” life tips are sure to put a smile on your face while completely failing to help you in any practical way.</p>\n<p>P.S.: These tips are a joke and may be dangerous, don’t try them yourself!</p>\n<p><strong>#1 Use a toilet seat to put your plate on while watching TV</strong></p>\n<p><img class=\"alignnone size-medium wp-image-2098\" src=\"/wp-content/uploads/2017/11/1-Use-a-toilet-seat-to-put-your-plate-on-while-watching-TV-284x300.jpg\" alt=\"\" width=\"284\" height=\"300\" srcset=\"https://vinth.azurewebsites.net/wp-content/uploads/2017/11/1-Use-a-toilet-seat-to-put-your-plate-on-while-watching-TV-284x300.jpg 284w, https://vinth.azurewebsites.net/wp-content/uploads/2017/11/1-Use-a-toilet-seat-to-put-your-plate-on-while-watching-TV-545x575.jpg 545w, https://vinth.azurewebsites.net/wp-content/uploads/2017/11/1-Use-a-toilet-seat-to-put-your-plate-on-while-watching-TV.jpg 605w\" sizes=\"(max-width: 284px) 100vw, 284px\" /></p>\n<p> </p>\n

Parse an RSS feed for Android app ? Is jsoup the answer?

I am reading the Head First Android development book. In the third chapter where they try to make an app from NASA RSS feed from here . In the book the author uses SAX parser for Java. I looked online and some of the answers here on SO suggest that SAX is outdated and there are newer solutions.
However I'm not sure what the easier to use ones are for Java. I have used Nokogiri for Ruby and something similar would be awesome. I looked at jsoup and it looked alright, but I am wondering what suggestions you guys might have.

I'm the author of Head First Android Development, so just wanted to chime in with a few thoughts. SAX is definitely a bit cumbersome, but straightforward and was built into Android for a while (hence the decision to use that in the book). I'm also a rails developer and I'm a big fan of nokogiri and use it often. Looking at jsoup, I could definitely see that being useful. That said, I haven't tried it out, so I can't give any first hand experience with it.
Another option to look at is the XML PullParser built into Android. It's still pretty SAX-like, but a bit more full featured.
Hope this helps.

The code on the chapter 3 halts because Android doesn't support networking in it's main thread.
So you can use any parser like XmlPullParser but make sure you do the networking(downloading the feed etc.) off of it's main thread. You can use AsyncTask to take the networking outside the main thread.. or create a new Thread() and do the networking in that thread (Recommended)
Actually, in the 4th chapter they actually DID create a new thread to do the networking. So if you use the chapter4 code instead then it will work.
Another problem you might face is of OutOfMemoryError because Nasa daily images are really big these days. So you'll have to decode the image with inSampleSize. You can check other questions on decoding an image right to get what you want. Good luck. ))

I'm a big fan of Jsoup. I only recently started using it and its amazing. I used to write some super hairy regex patterns to do pattern matching with because I wanted to avoid SAX like the plague... and that was quite tedious as you can imagine. Jsoup let me parse out specific items from a <table> in just a few lines of code.
Let's say I want to take the first 7 rows of a table where the <tr class=...> is GridItem or GridAltItem. Then, lets say we want to print the 1st, 2nd, and 3rd columns as text and then the first <a href> link that appears in the row. Sounds goofy, but I had to do this and I can do this easily:
String page = "... some html markup fetched from somewhere ...";
Document doc = Jsoup.parse(page);
for(int x=0; x< 7; x++) {
Element gridItem = doc.select("tr[class$=Item]").select("tr").get(x);
System.out.println("row: " + gridItem.select("td").get(0).text() + " " + gridItem.select("td").get(1).text() + " " + gridItem.select("td").get(4).text() + " " + gridItem.select("a").get(0).attr("href"));
}
Its that simple with Jsoup. Make sure you add the Jsoup jar file to your project as a library and import those classes which you need: you don't want to import the wrong Document or Element class...
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
Enjoy!

I think SAX is a default way to acheive it, no boundations on trying something new though :)

Since version 1.6.2, Jsoup officially also supports XML parsing. This thus allows you to parse XML and select elements using jQuery-like CSS selectors. To create a XML document with Jsoup, you need the following instead of Jsoup#parse() method:
Document document = Parser.xmlParser().parseInput(xmlString, "");
// ...
This way the input won't implicitly be treated as HTML5 (so, no auto-included <html><head> tags and so on).

xml to sqlitle loop in android

Hello all my second question here so be gentle :)
I'm still learning java and android, I'm learning it on my little project but I hit kind of logical wall.
I have XML file
<shift_plan>
<plan>
<agent data="John Smith"/>
<date data="6 Jan"/>
<shift data="M-3"/>
</plan>
<plan>
<agent data="John Smith"/>
<date data="7 Jan"/>
<shift data="M-3"/>
</plan>
<plan>
<agent data="John Smith"/>
<date data="8 Jan"/>
<shift data="M-3"/>
</plan>
</shift_plan>
on a web and I want to make a loop that would paste each data to function that put it to db. I have the function and working db so it looks like updateBD(agent, date, shift ) but how would I go about parsing the xml but to parse the 3 variables than put them in that function and than go again for the next 3 etc...until end of xml
I might be not making much sense I know, this must be something very simple I'm sure but I need really kick in the right direction..
Thanks for any answer,
Vlad

Android supports the XmlPullParser API right out of the box. It is an excellent solution for parsing XML documents in Android apps because you can start pulling information from the document right away (it's a streaming XML parser) and its pull-style API is a lot easier to use than that of a push-style streaming XML parser when all you need to do is parse the document into objects.
I am not sure if this is still true in Android 3 and 4, but the Android 2.3.x and earlier implementation of XmlPullParser (from the Apache Harmony project) does not support getPrefix() or getAttributePrefix(int index). Though, this shouldn't affect you because you are not using XML namespaces.
EDIT: Examining the git trees corresponding to the platform_frameworks_base tags, it appears that Android 3.2.4 and earlier have the XmlPullParser implementation from the Harmony project whereas beginning with Android 4.0, the implementation switched to kXML2.

Get neat content from Wiki page. (MediaWiki API)

I want to get a content page from Wiki in this format (the picture below) then show it in WebView. It means the content includes text and links.
I tried this but the output seems to be messy.
http://en.wikipedia.org/w/api.php?action=query&prop=revisions&rvprop=content&titles=Albert_Einstein&format=xmlfm

I stumbled across this answer a year later and would like to note that the ?action=render parameter has been depreciated as of this post.
The recommended method is to use the Mediawiki API to parse the wikitext.

You want index.php?action=render; an example. This returns the HTML of the page content with no sidebar/header/footer HTML. You'll have to match and remove infoboxes yourself.
Reference: MediaWiki — Manual:Parameters to index.php.

You can use HTML generated by mediawiki instead of wikicode.
BTW: look at this

Android - Getting data from XML file on the web

I need to get data from an XML file in Android. On the iPhone environment, my code is:
NSURL *thisURL = [[NSURL alloc] initWithString:#"http://www.xxx.com/file.xml"];
NSArray *myArray = [[NSArray alloc] initWithContentsOfURL:providerURL];
myArray is now an array of dictionary items initialized with contents from file.xml.
Is there any way to do this in Android? Can someone point me to doc or sample code?
I'm new to the Android environment and just need some direction.
Thanks,
Kevin

See Working with XML in Android for a variety of methods for dealing with XML. Which method to use depends on how big your XML is, and what you want to do with it. '
I'm not sure how it makes any sense to turn XML into an array, so no, none of the methods do that. If you want something similar to that, use Json instead of XML.

After a bit of research, it appears to me that using the Simple XML Serialization framework is going to be my best bet, especially since I do have a relatively simple XML file to read. The result will be a 'list' class with several 'entry' classes which seems like a viable way to handle this...probably better than having an array of classes as was done in the iPhone app.