I need to get information from this website: http://rowans.diekantankys.nl/bonnen/index.php?id=4 (It's in dutch)
From line 36 and on is a table in which you can see the debt op people on this website:
<td>Marc</td>
<td>16.75</td>
</tr> <tr>
<td>Marlieke</td>
<td>7.27</td>
</tr> <tr>
<td>Anne Ruth</td>
<td>4.70</td>
but all the functions and methods that I found that should download an HTML file from a website/web-server to a string/array somehow fail, can anyone give me a method on which I can give my full error report?
My apology's if this is considered: "Not a real question", I don't know how to formulate this
Thanks in advance
I would recommend to use (http://jsoup.org "JSoup") to download the parse the HTML from URL
You can get the HTML as document and read the text on the elements
Document doc = Jsoup.connect("http://rowans.diekantankys.nl/bonnen/index.php?id=4").get();
In you case on this website , you need to get the text in the table body i.e., tbody
String table = doc.body().getElementsByTag("tbody").text()
So, you need to download the content first in an background thread and then update the TextView on UIThread.
new AsyncTask<Void, Integer, Long>(){
#Override
protected Long doInBackground(Void... params) {
try {
final Document doc = Jsoup.connect("http://rowans.diekantankys.nl/bonnen/index.php?id=4").get();
runOnUiThread(new Runnable() {
#Override
public void run() {
String tableContent = doc.body().getElementsByTag("tbody").text();
// you can split the text and read it, as required.
textView.setText(tableContent);
}
});
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}.execute();
Hope it helps you. Let me know if any issue.
You have to download all the HTML content, put it into a string and parse manually the code. If you are interested in the values into that table, I would suggest you to search into the string that contains the downloaded HTML for a uniqui piece of string that identifies the beginning of the table (eg. search for '' tag and you put the HTML section of code of the table into a different variable. Then you proceed to parse manually that string searching for and and extracting the values with a loop. Another way would be use regular expressions but it becames more difficult if you're not faimiliar with them. It's not a relevant resource but in this android app, I did exactly what just explained https://github.com/rexromae/mytotem_android/blob/master/com.torvergata.mytotem/src/com/torvergata/mytotem/student/StudentLogin.java
Related
I am trying to convert iOS application into android. But I just start learning Java a few days ago. I'm trying to get a value from a tag inside html.
Here is my swift code:
if let url = NSURL(string: "http://www.example.com/") {
let htmlData: NSData = NSData(contentsOfURL: url)!
let htmlParser = TFHpple(HTMLData: htmlData)
//the value which i want to parse
let nPrice = htmlParser.searchWithXPathQuery("//div[#class='round-border']/div[1]/div[2]") as NSArray
let rPrice = NSMutableString()
//Appending
for element in nPrice {
rPrice.appendString("\n\(element.raw)")
}
let raw = String(NSString(string: rPrice))
//the value without trimming
let stringPrice = raw.stringByReplacingOccurrencesOfString("<[^>]+>", withString: "", options: .RegularExpressionSearch, range: nil)
//result
let trimPrice = stringPrice.stringByReplacingOccurrencesOfString("^\\n*", withString: "", options: .RegularExpressionSearch)
}
Here is my Java code using Jsoup
public class Quote extends Activity {
TextView price;
String tmp;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quote);
price = (TextView) findViewById(R.id.textView3);
try {
doc = Jsoup.connect("http://example.com/").get();
Element content = doc.getElementsByTag("//div[#class='round-border']/div[1]/div[2]");
} catch (IOException e) {
//e.printStackTrace();
}
}
}
My problems are as following:
I got NetworkOnMainThreatException whenever i tried any codes.
I'm not sure that using getElementByTag with this structure is correct.
Please help,
Thanks.
I got NetworkOnMainThreatException whenever i tried any codes.
You should use Volley instead of Jsoup. It will be a faster and more efficient alternative. See this answer for some sample code.
I'm not sure that using getElementByTag with this structure is correct.
Element content = doc.getElementsByTag("//div[#class='round-border']/div[1]/div[2]");
Jsoup doesn't understand xPath. It works with CSS selectors instead.
The above line of code can be corrected like this:
Elements divs = doc.select("div.round-border > div:nth-child(1) > div:nth-child(2)");
for(Element div : divs) {
// Process each div here...
}
I want to write XPKeywords in a Jpeg Image. Till now I am using Sansaleen java api for writing Exif tags in Jpeg images. I am able to write most of the tags like subject, comment, author, rating but I am not able to write Windows XP Keywords. I am using below code:
public static TiffOutputField getTiffOutputFieldKeyword(
TiffOutputSet outputSet, String metaDataToChange) {
TiffOutputField imageHistoryPre = outputSet
.findField(TiffConstants.EXIF_TAG_XPKEYWORDS);
if (imageHistoryPre != null) {
outputSet.removeField(TiffConstants.EXIF_TAG_XPKEYWORDS);
}
TiffOutputField tiffOutputField = new TiffOutputField(
TiffConstants.EXIF_TAG_XPKEYWORDS,
TiffFieldTypeConstants.FIELD_TYPE_BYTE,
metaDataToChange.length(), metaDataToChange.getBytes("UTF-16"));
return tiffOutputField;
}
I have googled this issue and came to know that XP_Keyword accept special encoded in UCS2 so I have updated my code. But still not able to write complete tags. Tags are semi-colon separated.
Please let me know if there present any resolution for the above issue or is there any other java/android lib which can write Tags in Jpeg files.
Got it working:
public static TiffOutputField getTiffOutputFieldKeyword(
TiffOutputSet outputSet, String metaDataToChange) {
TiffOutputField imageHistoryPre = outputSet
.findField(TiffConstants.EXIF_TAG_XPKEYWORDS);
if (imageHistoryPre != null) {
outputSet.removeField(TiffConstants.EXIF_TAG_XPKEYWORDS);
}
TiffOutputField tiffOutputField = new TiffOutputField(
TiffConstants.EXIF_TAG_XPKEYWORDS,
TiffFieldTypeConstants.FIELD_TYPE_BYTE,
metaDataToChange.getBytes("UTF-16").length, metaDataToChange.getBytes("UTF-16"));
return tiffOutputField;
}
Just use length of Bytes in "UTF-16" and then write. Also, Make sure you trim the characters to not include any spaces. Also, please give a try by separating string with Semicolon(;) as By default Windows take semicolon separated keywords.
I have a raw file with html content and comprising of <a href links. Right now I have referenced that raw file. Though the content displays, the links are not clickable. How do I make them clickable?
Below is the code for the same:
protected String doInBackground(final Void... params) {
try {
return Utils.readTextFile(Application.getAppContext(), R.raw.acknowledgements);
} catch (final IOException e) {
e.printStackTrace();
return null;
}
}
}
If using a TextView, you might use android:autoLink in XML or setAutoLinkMask in code to make URLs clickable. Note that this has nothing to do with <a> tags being present, it just scans for URLs (or other content such as e-mail addresses, if you enable them).
I'm making an Android app for my board community. The board provider gives me RSS feeds from general categories but don't generate feeds from topics. So I retreive topics URLs from these feeds and want to parse HTML with Jsoup and give it to a WebView.
It works nice except with the select() function which returns nothing.
The "HTML RETREIVED" log gives me : <html><head><title>The topic title</title></head><body></body></html>
h1 tags are in the code on test purpose : it displays well on WebView and the title of the parsed webpage too.
I also putted the log line right after the select() line. It returns nothing too.
I've tried in a pure Java project to parse with Jsoup only and it goes well.
So I assumed something's wrong with Android.
PS : Internet permission is active in the manifest.
Did I miss something ?
Here is the code :
String html;
Bundle param = this.getIntent().getExtras();
String url = param.getString("url");
try {
Document doc = Jsoup.connect(url).get();
doc.select(".topic .clear").remove();
String title = doc.title().toString();
html = doc.select(".username strong, .entry-content").toString();
html = "<html><head><title>"+title+"</title></head><body><h1>"+title+"</h1>"+html+"</body></html>";
WebView webview = new WebView(this);
getWindow().requestFeature(Window.FEATURE_PROGRESS);
setContentView(webview);
webview.getSettings().setJavaScriptEnabled(true);
final Activity activity = this;
webview.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setProgress(progress * 1000);
Log.d("LOADING",""+ progress);
}
});
webview.loadData(html, "text/html", "UTF-8");
//webview.loadUrl(url);
Log.i("HTML RETREIVED", ""+html);
} catch (IOException e) {
Log.e("ERROR", "Error while generate topic");
}
Ok I've found out something interesting.
The class I wanted to select was not here because I'm getting the mobile version of the webpage. It appears Android App use a mobile user-agent, which is quite normal but not said anywhere.
Anyway I know what thinking about now.
I am trying to parse HTML in android from a webpage, and since the webpage it not well formed, I get SAXException.
Is there a way to parse HTML in Android?
I just encountered this problem. I tried a few things, but settled on using JSoup. The jar is about 132k, which is a bit big, but if you download the source and take out some of the methods you will not be using, then it is not as big.
=> Good thing about it is that it will handle badly formed HTML
Here's a good example from their site.
File input = new File("/tmp/input.html");
Document doc = Jsoup.parse(input, "UTF-8", "http://example.com/");
//http://jsoup.org/cookbook/input/load-document-from-url
//Document doc = Jsoup.connect("http://example.com/").get();
Element content = doc.getElementById("content");
Elements links = content.getElementsByTag("a");
for (Element link : links) {
String linkHref = link.attr("href");
String linkText = link.text();
}
Have you tried using Html.fromHtml(source)?
I think that class is pretty liberal with respect to source quality (it uses TagSoup internally, which was designed with real-life, bad HTML in mind). It doesn't support all HTML tags though, but it does come with a handler you can implement to react on tags it doesn't understand.
String tmpHtml = "<html>a whole bunch of html stuff</html>";
String htmlTextStr = Html.fromHtml(tmpHtml).toString();
We all know that programming have endless possibilities.There are numbers of solutions available for a single problem so i think all of the above solutions are perfect and may be helpful for someone but for me this one save my day..
So Code goes like this
private void getWebsite() {
new Thread(new Runnable() {
#Override
public void run() {
final StringBuilder builder = new StringBuilder();
try {
Document doc = Jsoup.connect("http://www.ssaurel.com/blog").get();
String title = doc.title();
Elements links = doc.select("a[href]");
builder.append(title).append("\n");
for (Element link : links) {
builder.append("\n").append("Link : ").append(link.attr("href"))
.append("\n").append("Text : ").append(link.text());
}
} catch (IOException e) {
builder.append("Error : ").append(e.getMessage()).append("\n");
}
runOnUiThread(new Runnable() {
#Override
public void run() {
result.setText(builder.toString());
}
});
}
}).start();
}
You just have to call the above function in onCreate Method of your MainActivity
I hope this one is also helpful for you guys.
Also read the original blog at Medium
Maybe you can use WebView, but as you can see in the doc WebView doesn't support javascript and other stuff like widgets by default.
http://developer.android.com/reference/android/webkit/WebView.html
I think that you can enable javascript if you need it.