Android :: How To Make Use Of Views Defined In Layout XML File As Template To Create Views Programmatic Way
Feb 28, 2010
I want to populate a table, defined in layout xml file through the programmatic way. I have define Table with a single row defining its header, with all the attributes set. Now i want to know a way so that i can just replicate that header row in the table with new content.
I tried using inflator inflate(int,view) method, but at runtime it showed up with error.
Here is the XML code for the layout file defining the table
CODE:.................
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Aug 13, 2009
How can i make my animation visible above other views on the layout. i tried with the zorder adjustment but it didn't work out.
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Jul 30, 2010
I am newly working on android technology.I have use map view which is declared in another layout.I have to display in some part of may screen.can I use same map view or i have to create new mapview programmatically.In short i have to display map in some part of my screen.How can i do it?
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Jan 6, 2010
I have a simple ListView and on that ListView I have placed a number of custom defined Views. The CustomView has ImageView and two TextViews.
The CustomView also has a "stateful drawable" as background, so that the background image (a 9-patch) changes if you press the Row in the ListView. When pressing the Row, the background image changes to a Red-ish thing.
The problem is that when the background changes from the default greyish, all the Views in the CustomView (ImageView and TextViews) still have their greyish background and thus creates very ugly greay boxes on top of the now redish background.
What is the best way to solve that problem? I hoped that such things were handled automatically (as it is done in for example .NET), but I was wrong it seems.
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Nov 16, 2010
I am implementing a music player application in Android. My play list selection screen is implemented as a tab selector widget which contains a ListActivity inside each of the tabs: Artist, Albums, Songs.
I want to update the ListView in each of the ListActivity when I delete an item from any of the lists.
i.e. When I long press an item in the Artists list a context menu is drawn with "Delete Artist"
And it should delete all the songs from this artist in the Songs ListView, delete all the albums by this artist in the Albums ListView, and finally delete the entry for the artist in the Artist ListView.
Each of the ListActivity has its own fillData() method, which updates the ListView when the button in the context menu is pressed.
How can I call the fillData() method of the Albums ListActivity after I update the ListView inside of the Artists ListActivity?
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Mar 6, 2010
I have the following XML code:.................
The idea is to change the views, whenever I press one of the radio buttons. When I press a button the first time everything works out fine, but the second time I press a button, I get an IllegalStateException, and I can't quite see why I'm getting this.
Also, the Activity seems to set all my global variables to null, which is why I have to create them every time I switch from portrait to landscape or vice versa. So I would like to know if there is a way I can save my views in the Bundle, or any other way in which I can permanently save my views, so I don't have to add or create them every time, I flip the phone. And whenever I flip the phone, it seems that it rereads the main XML file, causing the RadioGroup to be set to 2D even if the 3D button is checked. This is because I've said the 2D button to be checked from when the app is first created, but I would like to also save the state of that RadioGroup.
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Jun 16, 2010
How do you align views relative to the "middle" part of another view? I think it is best explained with a pic of the UI I'm trying to create in android.
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Jul 9, 2010
Is there a way to get all the children views of a layout, from the Java code so that I can loop through them and set an attribute? Specifically, I'd like to set the "layout_width" based on the screen size. Since this "layout_width" would be the same for all the views, I'd prefer to loop through instead of calling each individual View separately by their id. The following is my main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content">
<LinearLayout android:id="@+id/myRow1" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1"> <TextView android:text="1" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
<TextView android:text="2" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
<TextView android:text="3" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
<TextView android:text="4" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
<TextView android:text="5" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
<TextView android:text="6" android:layout_width="wrap_content"
android:layout_height="50dip" android:layout_weight="1"/>
</LinearLayout> </LinearLayout>
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Oct 13, 2009
I have some optional views in my xml layout. Namely a radioGroup and buttons. How can I hide these programtically?
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Nov 15, 2010
I have a horizontal linear layout with multiple image views. Is there a way to resize these views automatically, so that all of them fit inside the screen? code...
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Jan 25, 2010
Is there any way to query a root view of an activity for all of its child views even before the root view or its children have been inflated? I guess what I'm looking for is whether a view knows ahead of time what children it will have before it gets inflated, and can I get that list in some way. Bizarre I realize, but I think it will help me with some unconventional automation testing I'm working on. I haven't found anything in the API like this.
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Sep 7, 2009
I am facing problem in fixing the child in particular place in views or layout.
1) Can I fix the child at the starting and ending of Layout directly?
2) Can I fix the child at the starting or ending of the view directly?
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Aug 29, 2010
I have a number of child views, each child is a TableRow and I need to be able to change the order of the TableRows, such that I can swap the rows into any order. I know there is a method called removeAllViews() but I don't really want to remove and re-create the views if its possible to access and change the order. I really want the display to update as smoothly as possible, taking the minimum amount of time, is it possible?
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Mar 7, 2010
Let's say I have a LinearLayout, and I want to add a View to it, in my program from the Java code. What method is used for this? I'm not asking how it's done in XML, which I do know, but rather, how can I do something along the lines of (One View).add(Another View) Like one can do in Swing.
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Jun 29, 2010
I want to create a full-screen page that looks like this:
---------------------------------------
| -------- --------------------------- |
|| || TextView ||
|| | --------------------------- |
|| Image | ----------------- -------- |
|| View || || ||
|| || TextView || ||
|| || || Image ||
|| || || View ||
| -------- ----------------- | ||
| --------------------------- | ||
|| TextView || ||
| --------------------------- -------- |
---------------------------------------
where each ImageView takes up at most 20% of the parent layout's width.
Primary question: Really...what is the best way to do this? After hours of searching, the best idea I can come up with is to get the screen's width and simply set the views' widths to be a max of 20% of that. However, this intuitively does not seem like a best-practice solution. (Eg. if the application wasn't running in full screen, this solution wouldn't work.) A LinearLayout won't work with the way the page is laid out (appears I have to use a RelativeLayout). And I think it would be preferable to set the views' widths based on the parent view's width (as opposed to the screen's width), but I'm not clear on how to do that either, because at the time that I'm trying to set up the widths of my children views, parentView.getWidth() returns 0. Does anyone have any good, clean solutions for how to create a page as shown above?
Secondary question: Does anyone know how to wrap text around images as shown above? After still more hours of searching, I couldn't find a solution for this; seems like you need to stitch together a couple of TextViews. Is there a better way that I'm missing?
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May 19, 2009
I am creating one quiz application, for question page i have created one view by using Linear layout in that i have added four TextAreas, first TextArea for question and reaming three are for answer cell. so now, when user select the answer cell i want to show next question screen for that i am thinking of creating new view. means some questions may have two answers so i want to create that at run time. how to create new view at run time ? and how to switch for new view.
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May 31, 2010
I have a set of custom views that I would like to add to a LinearLayout object. However, the first object I add to the layout (I do this dynamically, during runtime) has a OnMeasure method that tries to get as much space as possible resulting in that it get's all the space LinearLayout object. This is correct behavior, but when I then add more objects following that I want the allocated area for the first object to decrease so the others will fit. As it is now, each following object will get zero space, and hence won't be visible.
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Apr 19, 2009
Is it possible to add a view dynamically that overlaps other views in the layout. I have Linear Layout defined for the activity. As part of the Layout I have a custom View. The content changes dynamically and sizes appropriately based on the content size, with fill_parent for width and wrap_content for height. But what I want is, dynamically take over the full screen and then based on a click go back to the normal mode. Is there a mode to display a view where - in it can overlap all other views in the layout?
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Aug 19, 2010
I defined a LinearLayout:
<LinearLayout android:id="@+id/top_menu"
android:layout_width="fill_parent" android:orientation="horizontal"
android:background="@drawable/backrepeat" android:layout_height="wrap_content" >
<ImageView android:id="@+id/topLeft" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:layout_gravity="left"
android:src="@drawable/library_top_left"> </ImageView>
<ImageView android:id="@+id/topMiddle" android:layout_height="wrap_content"
android:layout_width="wrap_content" android:layout_gravity="center"
android:src="@drawable/library_top_middle"/>
<ImageView android:id="@+id/topRight"
android:layout_height="wrap_content" android:layout_width="wrap_content"
android:layout_gravity="right" android:src="@drawable/library_top_right"/>
</LinearLayout>
I'd like that one image is on the left side of the screen, one in the middle, and one on the right side. However all of them are on the left side.
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Jun 20, 2010
Let's say you want to have a TextView and a Button in a Layout with horizontal orientation. Can you have the TextView aligned to the left and the Button - to the right?
---------------------
TextView Button
---------------------
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Nov 24, 2010
I am adding a series of custom views to a LinearLayout. I have overridden the onMeasure method of these custom views, to return the dimensions based on certain parameters. Based on user input, I would like to change these parameters, to change the size of the views. How can I force the LinearLayout to "re-layout" it's children, to reflect the new dimensions?
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Jan 22, 2010
There is a given set of predefinied Views that can be used in layouts for AppWidgets. How can a customized View added to this list?
The minimum requirement is that the class is annotated with RemoteView. What else is necessary to be acceptable as view in the layout.xml?
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Mar 18, 2010
I have a case where I have add to listview textview based on no of messages.
1) I am doing like this for.
CODE:..............
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May 23, 2010
I want to create an activity, which shows a question with 4 answers, and at the bottom of the screen i want to place a timer. i have already found timer example, and i created a question with the answers. the problem that they are 2 different projects and activities, and i am looking for the best way to implement it. i think i can't show 2 activities on one screen, but i can show 2 views or shell i use the ViewGroup, or maybe to copy-paste one of the activities code to another ( its the easiest way but probably the most ugliest way to implement it).
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Oct 2, 2010
I am parsing the url to display the contents in it, my requirement i have to display the each content in separate textviews.
For Instance: Let us assume the contents in that url are FootBall, Carom , chess, VolleyBall and so on . I want to display FootBall as a individual textview similarly others. so i cannot declare the textviews in xml what i usually do.
CODE:................
So i planned to create textview via java code
This is my parsing code which parse the url contents and store the result in a string array namely san_tagname; depending upon the length of this variable i want to create number of textviews.
CODE:..................
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Mar 22, 2010
I have problems getting some of my views aligned in a relative layout that I use inside a row of my listview.
Here is a screenshot from the layout builder in Eclipse, this is what I think it should look like:
The next image is from the emulator. Now the TestTestTest View is at the top and covers the name and distance Textviews.
This is my layout:
CODE:...............
Shouldnt align_parent_bottom put the view at the bottom of the cell in the list?
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Jun 11, 2013
I am using a linear layout to draw a scalable background in my app. I am then defining multiple imageviews inside the linear layout, all of which are PNGs containing a transparency layer. I am wanting to overlay these transparent imageviews on top of the background. My issue is that only the first defined imageview shows on top of the background, any subsequent imageviews do not appear.
CODE: Note that imgSen1 appears properly with transparency overlaid on the background. imgSen2 does not appear. If I define imgSen2 first, and imgSen1 second, imgSen2 then appears properly, as if only the first defined imageview can be seen. I would like to have multiple imageviews with transparency overlaying the background.
<LinearLayout
android:layout_width="627dp"
android:layout_height="436dp"[code]...
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Oct 15, 2010
I am trying to dynamically create a interface using a relative layout. I would like to align different views with each other and am finding the need to know the id of a previously created view so that I can use them in subsequent layout params.
Is there a preferred or best way to generate or create ids for views that are created dynamically?
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Oct 14, 2010
I have multiple view. But for systematic distribution of views (.xml files inside layout folder). I would like to have different packages (/folders) inside Layout. Is It possible. @Attached : Screen shot. IF that is possible, is the following statement correct ?. If Not whats the solution?
setContentView(R.layout.payBill.payMyBill);............
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Aug 6, 2010
I have read the Android UI trick 2 on Android developers, which tells people how to include a layout in another layout file multiple times, and give these included layouts different id. However, the sample here is overwriting the layout id, not the id of the views IN this layout. For example, if the workspace_screen.xml looks like this: And I include it three times in another layout file. Do I end up with three TextViews with id firstText, and another three with secondText? Isn't there an id collision? And how do I find the secondText TextView in the third included layout with findViewById? What should I input in the findViewById method?
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