I am building a basic twitter client application. I am trying to figure out how to make the TextView that holds the Tweets to autoLink the #mentions so that they link to the twitter page of whoever it is the same as it does on the twitter website. My guess is that this is going to involve making a custom TextView and adding this into the part that already handles the auto linking of websites,emails,maps and such. Is this right approach to achieving something like this? or should I be using a stock TextView and handling this by parsing the tweet before it gets put into the view? If I should be going the custom view route could anyone point me in the right direction for how to get this capability added to the autolink? And if I should be using the stock TextView and handling it in java before the tweet gets put into the view how do I get it "linkify" the text my only guess is using something like .fromHTML() but I'm not even sure if this supports the tag.
Have a look at the Linkify class, including the interfaces Linkify.MatchFilter and
Linkify.TransformFilter. You should be able to set up a MatchFilter that works on # links, and a TransformFilter that translates them into the appropriate URL format.
Here's a page that walks you through the usage of these classes; it even uses Twitter as an example for using TransformFilter.
Related
I need to make all numbers in a string become links.
The expected action when any of these links is clicked is to append the clicked number to an existing string.
I managed to linkify the numbers by using the following code:
Pattern myMatcher = Pattern.compile("[0-9]*");
Linkify.addLinks(myString, myMatcher, null);
How can I access and retrieve the clicked number in this case?
I tried looking in other questions related to Linkify but seems all are describing ways to have an action that opens an activity or open the default app for that link type (email address/web URL/etc.)
Thanks in advance for you help :)
You can Customize Linkify to append any predefiened string(scheme) into that.
Take a look at the following post Android Developer Blogspot (Search for "Custom Linkify")
For clarity I am describing a portion of that post here:
Linkify will automatically append whatever is matched to a scheme that
is supplied to it, so for the sake of argument let's assume we have a
ContentProvider that matches the following content URI:
content://com.google.android.wikinotes.db.wikinotes/wikinotes/WikiWord
The WikiWord part will be appended by Linkify when it finds a match,
so we just need the part before that as our scheme.
Now that we have these two things, we use Linkify to connect them up:
Pattern wikiWordMatcher = Pattern.compile("\\b[A-Z]+[a-z0-9]+[A-Z][A-Za-z0-9]+\\b");
String wikiViewURL = "content://com.google.android.wikinotes.db.wikinotes/wikinotes/";
Linkify.addLinks(noteView, wikiWordMatcher, wikiViewURL);
Linkify can be used multiple times on the same view to add more links,
so using this after the Default Linkify call means that the existing
active links will be maintained and the new WikiWords will be added.
You could define more Linkify actions and keep applying them to the
same TextView if you wanted to.
Now, if we have a WikiWord in the TextView, let's say MyToDoList,
Linkify will turn it into an active link with the content URI:
content://com.google.android.wikinotes.db.wikinotes/wikinotes/MyToDoList
and if you click on it, Android will fire the default intent for that
content URI.
For this to all work, you will need a ContentProvider that understands
that Content URI, and you will need a default activity capable of
doing something with the resulting data. I plan to cover these in
future blog entries (and soon). In fact, the whole Wiki Note Pad
application is currently undergoing some clean up and review, and will
then hopefully be released as a sample application.
Very Basic. but i know how to connect to webpage in java the thing which i don't know that how to deal with buttons(Login button) and username(text filed) and password(text field)in android
Just treat it as a form and pass the login credentials using POST method to the page which is mentioned in the action attribute of the login form.
When dealing with buttons, simply get the text from getText() for EditText and then in onClickListener() of the button, fetch the information from jsoup functions by passing the above info as the POST parameters.
I'm working on a project for my university about customizing an Android application on runtime.
Is it possible to include layout XML files that are actually not in the \res\layout\ folder of my android project but on an external webserver?
The idea behind this is to give me an opportunity to customize the xml-file on my webserver, e.g. adding new fields, without having to re-install/update the app.
I'll try to explain my idea with the following example:
Let's say I got an application to save and display addresses. All addresses are stored in a database. I got the fields 'name' and 'surname' in my database and displayed in the app when saving or displaying the addresses.
Now I would like to add a third field 'email' where I can enter email addresses.
My idea is to create this field in my database and add it to my layout-xml-file which is on my webserver. So I can 'link' the xml file within the app and the new field appears after refreshing the app.
Hope you guys can give me some information about how to customize my input forms on runtime, my research on the internet didnt help me out at all..
Greetz
You can't use external XML files to dynamically adjust the layout.
The documentation of LayoutInflater#inflate(XmlPullParser, ViewGroup) explains why:
Important For performance reasons, view inflation relies heavily on pre-processing of XML files that is done at build time. Therefore, it is not currently possible to use LayoutInflater with an XmlPullParser over a plain XML file at runtime.
But you can create your layout dynamically in code, see e.g. Android Runtime Layout Tutorial
So you could put a file on the server that holds layout information, fetch it in your app, parse it and create the layout dynamically. It is going to be a lot of work since you would basically replicate Android's LayoutInflater. You can obviously simplify the format to just the basics that you need but it's still a lot of work that is IMHO not required.
Let's assume your layout info is just a plain text file that has name of fields
name
surname
email
You can then read it line by line and create a simple EditText for each in a way like
private View getDynamicLayout(ArrayList<String> lines) {
LinearLayout ll = new LinearLayout(this);
for (String line : lines) {
EditText et = new EditText(this);
// fill it with some text
et.setText(line);
ll.addView(ll);
}
return ll;
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayList<String> layoutConfig = readConfigFromFile();
View layout = getDynamicLayout(layoutConfig);
setContentView(layout);
}
But unless you really need that, I would suggest that you update the app the regular way. It is also faster to use preprocessed layouts instead of building that info on your own.
Also take care not do heavy disk / any network access in the UI thread like in above example (reading the file). That should be done in a background task.
Thanks a lot for your help. I'll try to get through this.
The reason I can't just update the app is that the app I'm talking about is actually a CRM system used by many different companies. They all have to download the same app from the google play store.
The goal of my work is that every company can customize their input forms on their own, so there could be many different input forms (each for every company) but all using the same app.
I thought about a server that stores a file with the layout information which can be accessed by the app on runtime.
btw, since I'm not a software engineer, I don't have to write any code, I only have to describe the concept in an abstract way.. :)
Im making a simple app for some friends to use on there android phone that shows my website with images. Im using a webview to show the website inside the app. I want the users, to be able to save the actual image. Either by Hold down on the image or actually clicking a button. Been looking around on googles docs ands cant seem to find anything for this.
I haven't actually played around with this yet, but from the docs it appears you have at least two (non-deprecated) options:
getHitTestResult()
requestImageRef(Message msg)
According to the documentation you can use the first option to test for IMAGE_TYPE as result, and a url to the image is provided as well:
If a HTML::img tag is found, the HitTestResult type is set to
IMAGE_TYPE and the url is set in the "extra" field.
The second option will give you a similar result:
Request the url of the image last touched by the user. msg will be
sent to its target with a String representing the url as its object.
Not sure if these options are compatible with a 'long click' too though.
Alternatively, how did you have in mind to link clicking a button to a specific image? Depending on your solution for this, you may also be able to simply capture all loaded image resources using onLoadResource(WebView view, String url), build a list of image references and download the one that button click refers too.
I have formatted data with commands embedded with tags. I use the HTML class to populate the TextView. Is there a way to intercept the click on the link and get what was clicked?
Html.fromHtml("<a href='CMD:Bahai'>Some Command Link</a>");
I found that the WikiNotes example project from Google does exactly that. It uses the Linkify infrastructure with a Provider and MIMIE type to load the right Activity.