Android :: Adding Views To Another View

Oct 9, 2010

Is there a possibility to add a view or derivative (button, textview, imageview etc...) to another view without having to go through layouts?

I have a class called ScreenView, it derives from View (e.g. public class ScreenView extends View).
I wanted to display text into it, labels, images etc..

On an iPhone it's trivial, simply create my objects and use addSubview method ; you can embed any UI objects into another. Most UI toolkits work that way too.

Problem with layouts is that I haven't found an easy way to properly position a subview (say a text view) in a given location of the enclosing View. I want one to contain the other...

I was hoping I had missed something in the documentation (which is far from being intuitive that's for sure) and I could do something like myView.addView(subview). But it ain't so :)

As a side question, what is the closest to iPhone's UILabel in the Android world?
A UILabel can contain a text or a graphic. Right now I've been using TextView and ImageView but they aren't anywhere as flexible when it comes to layout as a UILabel

Edit: Making my View inherit from ViewGoup instead, let me add subview..
However, I want to draw in my view. I found that when ScreenView extends ViewGroup, the onDraw function is never called then.

Something like:

CODE:..........

Would paint in yellow my view if ScreenView extends View ; but not if it extends ViewGroup.

How do you draw directly in the view then?

Android :: Adding Views to another View


Android :: Views And Their Child Views - How To Avoid The Ugly - Boxes - When Child Views In A View Has Another Color Than Background

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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Android :: Adding View To Bottom Of Layout Inside Scroll View

Mar 10, 2010

So my layout looks basically like this:
<ScrollView>
<RelativeLayout>
<BunchOfViews/>
<ImageView android:layout_alignParentBottom="true"/>
</RelativeLayout>
</ScrollView>
I have the ScrollView so all of the layout always is visible no matter the height of the screen. The problem is that on a very high screen, I still want my imageview to be at the bottom. However, a child of a ScrollView dont seem to have a defined bottom. The View is placed at the top of the layout. How can I solve this problem in a neat way?

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Android :: Adding Child View At Particular Location In Parent View

Mar 20, 2010

I need to draw a child view containing a rectangle and button on top of the content view at particular location on the parent (content view). How can I do this? Did not find an explicit way to set origin of child view?

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Android :: Putting Views On Top Of Other View

Feb 9, 2010

I'm still trying to figure out how best to layer views on top of other views. I want to do something like the ZoomButtons on top of a custom view. I tried getting the ZoomButtonsController's parent and then adding views, but I didn't have enough control and they ended up on top of the buttons. I've gotten close by using a FrameLayout and some gravity on the top two views. But this has some interesting effects. Since this is contained with a tab, these two top views appear on top of all four of the tab pages. I want them on top of one of those pages only. Apparently, nested FrameLayouts don't mix well. What is the proper and expected way to do this? Here is more or less my complete layout....................

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Android :: How To Disable A View Provided There Are 2 Views In Xml?

Mar 25, 2010

The reason for me to do this, I have created these 2 views in the beginning of the app. SO they are always present. But in some cases where i want only 1 view(which is surfaceview) and if i dont need the 2nd view(i.e, videoview), i am still getting a black patch at the palce where i have defned a videoview. want to get rid of this. Can anyone please tell me if it is possible to disable views/surfaces corresponding to them? If so how can we do this?

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Android :: Add Child Views To Main View

Oct 23, 2010

I am trying to figure out how to add a child view to a parent view so I can use the MotionEvent.ACTION_MOVE feature to move from one child view to the next. Is this possible?

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Android :: List View Invalidate Views Not Working

Nov 11, 2010

I have an List Activity with a Base Adapter where the contents have changed (example - the rows are reordered). I have tried invalidate.
Code...

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Android :: Way To Add A View To Overlap Other Views In Layout / Activity?

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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Android :: Support Clone Of A View In Custom Views / Api To Use It?

May 14, 2009

Is it possible to clone a view. If no, how to support clone of a view in custom views. If yes.. which api should we use. clone method seems to be protected for view.

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Android : Put Custom View Above Built In Views In Droid?

Mar 11, 2010

I am developing a small app for Android. I am creating my own view.

I am planning to design the layout to be:

<LinearLayout>
<MyView>
<Button><Button>
</LinearLayout>

But when I run my program, my custom view will cover the whole screen. Is there anyway to avoid this?

I have already tried to add android:layout_width, layout_height to be wrap_content, fill_partent, but no luck.

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Android : Iterate Through All Views In View Group Without Knowing Their Ids?

Feb 12, 2009

I'm looking for a way to iterate a viewgroup to retrieve all child views without calling findViewById(). Does view count and view position line up? So can I get the view count and then use that as a counter to call getChildAt(int index)?

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Android :: View To Right Side Of Another And Centering Vertically On Second Views Height

Oct 18, 2010

I was wondering if there is a way for placing a view to the right side of another view and centering it vertically on the second views height. In know this can be done using a LinearLayout, but for other reasons the 2 views must be part of the same RelativeLayout.

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Android :: Adding A Custom View Through XML

Apr 22, 2010

I was attempting to add a custom view in XML, but I kept getting force closes. It works fine when I just find the parent and use addView() so it isn't the code. I'm pretty sure I'm just getting the constructors wrong. Does anyone have any experience with this?

Here's what I've got:

CODE:................

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Android :: Adding Scrollbars In A Custom View

Mar 5, 2010

I am working on adding vertical and horizontal scrollbars in a custom drawn View. I have overridden the compute*ScrollOffset, compute*ScrollRange, etc methods and have enabled the scrollbars by called set*ScrollBarEnabled. However, I do not see the scrollbars in my View, even after a call to scrollBy, which according to the documentation calls awakenScrollbars (I assumed awakenScrollbars is not required as the scrollbars do not auto-fade - isScrollbarFadingEnabled returns false).

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Android :: Adding View On Runtime To ViewFlippers

Nov 24, 2010

I have defined two views ExampleView1, ExampleView2, ExampleView3 and ExampleView4 in resources. In my Activity I have an empty ViewFlipper. Based on doing some logic I want to add either ExampleView1 and ExampleView2 to the ViewFlipper and show the view. Later I want to add based on internal logic either ExampleView3 and ExampleView4. How do I do this?

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Android :: Refreshing LinearLayout After Adding View

Mar 18, 2010

I'm trying to add views dynamically to a linearlayout. I see through getChildCount() that the views are added to the layout, but even calling invalidate() on the layout doesn't give me the childs showed up.

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Android :: Reg - Error In Adding View To ViewGroup

Nov 25, 2009

I am trying to add a view to a viewgroup but I am getting the following error when I run the application

Error: E/AndroidRuntime( 570): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. Code: public class ExampleApp extends ViewGroup{

private LayoutParams mLAyoutParams; AlbumArtImageView mAlbumArtThumnail;

static final String TAG = "ExampleApp";......................

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Android :: Adding Item To View Programatically?

Nov 8, 2010

I am trying to find out how I can add an item (from xml drawable/workaround_item.xml) in a LinearLayout that is vertically aligned.

CODE:.........

At the beggining I was trying to use a ListView but as far I as know there is a bug using listview inside a scrollview. I was doing this because i have more components on the view that should be scrolled together with the list view. So I decided to remove the listview and implement a simple linear layout where i will be adding each element bellow other and so on.

The layout for the activity is as folow (layout/workaround.xml) and i would like to start adding the elements below the top bar.

CODE:........

Thats my java code:

CODE:......

Thats the result i am getting: http://twitpic.com/3562yu

Does android allow us to do this? If so, Hoe can I add the elements and set their values? (this layout will be dispalying results of soccer games).

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Android :: Simple Cursor Adapter - List View - Binded To XML Document With Three Text Views

Mar 18, 2009

I have table with 3 columns which is binded to an XML document with three text views.

CODE:........

Depending on the value store in the third column, I want to change the text color in R.id.c. How should, I go about with this.

This is what I have so far :

COD:...............

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Android :: Can't Touch On Screen When Adding View In Arrayadapter

Apr 19, 2009

I want to add some views in each row of list view. When I add text view and image view in getView() of ArrayAdapter,it works. But after I add other kind of views (like Check Box and Image Button...), I can't select the list row touching down screen directly, I only can select by key down, up and ok.

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Android :: Adding Live Background To View / Like Twitter App

Sep 22, 2010

In the official Twitter Android app, the opening activity (the dashboard) and the Tweets tab activity have a live background/wallpaper (clouds moving, etc).How do you accomplish that?Is it as simple as setting your view's background to a live wallpaper drawable?And then adding

<uses-feature android:name="android.software.live_wallpaper" /> to your manifest?

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Android :: Dynamically Adding A View To Activity Layout

Aug 18, 2010

I have a custom view (an extension of a TextView) that I want to dynamically add to my Layout (don't want to include it in the main.xml file).

The book says to fetch the RelativeLayout using findViewById() in my java code then create a new instance of my custom view, then use addView on the RelativeLayout to add the new view.

I'm not getting any errors, but when I click my button to add the new view, nothing is happening (view isn't being added). Do I need to set additional properties on my custom view (layout width, layout height for example) in order for it to be shown?

Adding code

CODE:............

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Android :: Adding GestureOverlayView To My SurfaceView Class - How To Add To View Hierarchy

Jul 30, 2010

I was informed in a later answer that I have to add the GestureOverlayView I create in code to my view hierarchy, and I am not 100% how to do that. Below is the original question for completeness.

I want my game to be able to recognize gestures. I have this nice SurfaceView class that I do an onDraw to draw my sprites, and I have a thread thats running it to call the onDraw etc .

This all works great.

I am trying to add the GestureOverlayView to this and it just isn't working. Finally hacked to where it doesn't crash but this is what i have

CODE:..........

The onGesturePerformed is never called. Their example has the GestureOverlay in the xml, I am not using that, my activity is simple:

CODE:................

So I am at a bit of a loss of the missing piece of information here, it doesn't call the onGesturePerformed and the nice pretty yellow "you are drawing a gesture" never shows up.

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Android :: Get Event Of List View Field When Adding Checkbox In Listview

Apr 21, 2010

i have problem to get event of list view field when i am adding checkbox in listview. my problem is to get the status of check box form every row of the list view, either it is check or not, according to that i have to do operation.

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Android :: Adding View Extending From SurfaceView To Layout Gives Blank Screen

Jun 5, 2010

I'm very new to Android programming, so this is probably something pretty basic. I just have an xml layout with a few buttons. I'm trying to follow the model given by the JetBoy demo, so I'm adding a view to the layout which extends SurfaceView. When this new view is put in my xml layout, I just get a blank screen.

Here's the XML layout if it helps. The gameview element is what causes the screen to be blank

CODE:......................

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Android :: How Can Update The All The Views Inside A TabHost When Pressing On A ContextMenu Item From Within One Of The Views

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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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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Android :: List View Methods Invalidate Vs Invalidate Views?

Dec 23, 2009

What's the functional difference between these list view methods: invalidate() and invalidate Views() ? Which one is faster to refresh a list view?

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Android :: Switching Views With RadioButton And Saving Views In Bundle

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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