Android :: How To Implement Custom View With Variable Fields?
Jul 7, 2010
I have a ListView that displays a set of notes, each with varying ammounts of data (i.e. some have a due date, others don't).Currently, each view in the list is a RelativeLayout containing a TextView for each field, plus two Button and a CheckBox. I then simply hide the unused fields by setting visible false on each one.This has worked well, but I'm about to add a lot more data fields to the notes and inflating that many unneeded views for each row will surely kill my app. I need a more dynamic solution.I've decided the best way to go is to create a custom view. How can I implement/design my view so that it can display a variable number of text fields without creating/ destroying textviews each time (which would be quite expensive and worse than my current situation), or maintaining a large pool of hidden textviews?
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May 8, 2010
In the Android docs on AlertDialog, it gives the following instruction and example for setting a custom view in an AlertDialog:If you want to display a more complex view, look up the FrameLayout called "body" and add your view to it:First off, it's pretty obvious that add() is a typo and is meant to be addView().I'm confused by the first line using R.id.body. It seems that it's the body element of the AlertDialog but I can't just enter that in my code b/c it gives a compile error. Where does R.id.body get defined or assigned or whatever?
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Dec 7, 2009
I have implemented a custom adapter the extends from the BaseAdapter and implements the getView method. It works fine except for one thing, not once do I get the convert View (a parameter to the getView method) that is not null (that can be reused).
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Jul 15, 2010
I am using one class which extends ListActivity and One class extending BaseAdapter.
The Base Adapter uses getView function to inflate layout from xml.
The xml contains a text and a button to delete the row of list.
Please let me know how to handle the button click in the ListActivity class.
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Jun 9, 2010
Alright, I'm a little new to the Android SDK, so forgive me if my question doesn't make sense or is very trivial. I'd like to add a custom field for contacts, that contains the contacts username on a website I'm doing this app for. And, with this custom field, I'd like to have the ability to click it (like "Send message" or "Call mobile") so that I can go to a specif Activity in my application, with a TextView set with the username that I just clicked on.Sorry if that is a bit confusing, if you need anything else let me know!
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Apr 19, 2010
I'm implementing custom widget exdending a View class. But I've found that View's protected field (e.g. mLeft) is not accessible from subClass
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Oct 10, 2010
I'm trying to add a custom data field and MIME type to the Contacts screen. Is there a way to do this such that when a user views a contact with my data saved on it, my field appears there? This is something I've seen other apps do--how do the Facebook, Twitter, Last.fm, etc. apps add their status information to contacts, for example? I can't seem to figure it out from the Contacts API documentation.
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Jul 21, 2010
Whew... I just rooted and installed the "Official Froyo HTC Sense ROM" from AdamG.
It seems to look and feel exactly like 2.1, which wasn't what I was expecting. I was expecting the lockscreen to be different (the horizontal one). Is that a feature of Sense? Do I HAVE to get rid of Sense to install that?
Also: Now I am unable to add custom fields to even my Google contacts (earlier I couldn't do it for phone contacts, but it was possible for Google contacts). Is that a problem with this ROM? What ROM should I install to have this feature?
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Jul 18, 2012
Looking for an app where i can create information on people i play against at poker. I want to be able to profile each player and have custom fields to which i can make a custom dropdown or have a text box. For example, want different fields for name, loose/tight, preflop, notes, etc etc. The only poker tracking app I ser that is close is poker agent, and in that most of the profile fields are for physical features. I cannot find a contact app that allows for custom named fields.
SCH-I535
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Oct 23, 2010
I would like to be able to save& view the data from 3 edit text fields and a date pick to an SQL lite DB. Can anybody point me to a decent beginners tutorial or perhaps give me an idea of where to start?
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Sep 26, 2010
Is copying the reference to the object and not the value of the object. Meaning, when I modify pos.top or pos.bottom, the original object gets modified. I'm guessing I am missing a concept of pass object by reference vs value here which I thought I understood. What is the fix here? Is it a problem with how I defined my custom class?
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Nov 3, 2010
these is how to give a string as argument String link ="http://www.adobe.com /devnet/acrobat/pdfs /pdf_open_ parameters.pdf"; webview.loadUrl(link);But how to give an "URL" variable to load its content to webview.
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May 7, 2009
Just like the html a tag, I want dispaly a link text, when user click the linkView then trigger some evnet( link: open a new page). when user click the google text ,then open the google home page: www.google.com. I saw the TextView and the Linkify class, but is can only display the url to a underline link text.
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Oct 8, 2010
I have an ExpandableListView that I want to populate with my custom views of type NoteView. NoteView extends LinearLayout and contains two buttons and a checkbox. I have almost everything working, the NoteView's are being populated with backing data, the lists are getting filled, and the buttons are clickable and perform the required tasks.
The problem is the ExpandableListView no longer responds to click/longclick/keypress events at all (other than selecting list items with trackball/DPAD).
I replaced my custom view with a standard TextView and the touch events flowed normally again, so it is almost certainly something I am doing wrong with my custom view or some obscure ListView setting I am overlooking.
Here is my NoteView code and XML Layout. What am I missing?
CODE:.........................
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Jun 9, 2010
Why I can't implement OnKeyListener with parameter View such as on example where parameters are (View v, int keyCode, KeyEvent event) I'm forced to use parameters (DialogInterface dialog, int keyCode, KeyEvent event) but not the View as I want.
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Dec 14, 2009
I want to implement a custom input method for certain EditTexts within my app. I understand I need to extend the InputMethodService class, but how do I then add this to certain views? I've tried just using the class name in the android:inputMethod XML property, but this seems not to work. Using the SoftKeyboard example in the 1.5 SDK, my manifest is as follows:..............
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Jan 29, 2009
I like the blinking blue dot with the surrounding disc showing the accuracy.
How do I implement such a dot in my custom Canvas? I know I can subclass MyLocationOverlay class, but I need to draw the dot using my own data, etc.
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Aug 17, 2010
I want to build my own custom view which should look like the Crysis-GUI.At first I designed a XML-based Layout and made it visible via the setContentView(int resid)-Method. Worked pretty well.But now I wan't to go a step further and draw in my Layout. So I created a new Class, let it extend View and overrode the onDraw()-Method. So far so good.But how can I still use my XML-Layout? I can't do setContentView anymore, so how could the same effect be achieved?
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May 20, 2010
I need to implement a list view with checkbox and each item should be associated with images.
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Jul 12, 2010
Sample code there is a method getitem(position) in the class of image adapter which returns null for the sample example. However, this method is important and is supposed to return the corresponding data item of the image adapter. For example the image adapter could generate a series of customized image views by magically calling the getview method. How could we implement the getitem(position) method under this case to help us gain access to these customized image views?
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May 26, 2010
I have a custom view that works fine and I'm trying to get gestures into it. The most common technique I see is to add XML, such as this (from Android docs.Can someone point out my errors, suggest a better way that will allow me to get gesture callbacks and/or suggest diagnostic approaches?
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Aug 30, 2013
implementation of undervolt in the source of a custom kernel for my Galaxy Ace II X (GT-S7560M)?
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Nov 3, 2010
I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).
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Jul 16, 2010
I've created a custom view in an SQLite database for an Android application. I'm using Sqliteman on Ubuntu to test my SQL statements before I put them in my app. I'm trying to do a simple select statement on my view. The select statement works fine in SQLiteman but when I put the same statement in my code it throws an error. The statement: select * from item_view where parent_item_id = 0;........
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Jul 8, 2009
I'm creating my own View class, and defining custom xml attributes with a attrs.xml. As long as I provide each attribute manually, there is no problem, but
code:...................
The android:text is properly set in my instance, but the borderDrawable is not. I guess this has something to do with namespaces, because inside the styles.xml, the name="mypack:borderDrawable" is not handled by the XML parser's namespace facility, because its inside an attribute value. So "mypack" is in no way connected to "http://some.weird.url.com/seems/not/to/ matter" and adding it via xmlns:mypack... to the stylefile would not help, I guess. In the same file, "android:text" is somehow recognized, even though "android" is AFAIK only a ns-defintion for [url], which is also not declared in that file.
So what is the proper way to set a custom attribute in a style?
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Oct 9, 2010
I'm writing my own custom view, a keyboard, which I think the ArrayList in the keyboard view is causing the application to quit in the emulator.
public static ArrayList<HexButton> hexButtons = new ArrayList<HexButton>();
The application ran fine when I did
setContentView(myKeyboardView);
But I want to nest my keyboard with a TextView so I'd like to be able to do
setContentView(R.layout.main);
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Apr 23, 2010
Trying to support Swype on application for Android. The code isn't using Android's native EditTextView but our own custom View. What API can be used to retrieve the text once a swype has been completed and what callback method we should expect in our View?
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Nov 19, 2010
Can I use a custom view like com.examples.me.customview in the xml file of a app widget and can then draw in the onDraw of the custom view? Or do I have to draw into the drawing cache of an ImageView instead?
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Aug 2, 2010
i made a extended a View, overwrote the 3 View Contructors and tried to insert it on my xml of a widget.is it possible to use custom views in Widgets?
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Aug 8, 2010
I want to create a custom view.In which i want to have a background image,2 buttons,1 textview.Can anybody tell me how to start with.
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