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.

Android :: Refreshing LinearLayout after adding view


Android :: Adding Checkboxes To LinearLayout

Sep 9, 2010

I want to add some checkboxes to a LinearLayout at runtime. The orientation is vertical and I want the checkboxes to appear at the bottom. I create each checkbox like this: CheckBox box = new CheckBox(this);

Then I add the box to the current view like this: addContentView( box , params ); What should be the params to get the effect I want? So far, everything I've tried ends up overlaying the new checkboxes on top of each other and on top of the other items in the layout. I want everything stacked in a column with the new checkboxes at the bottom.

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Android :: Adding ArrayList Of LinearLayout Objects To UI

Jan 27, 2010

I am trying to use the following code to go through an ArrayList of LinearLayout objects, add each one to a TableLayout, and finally add that TableLayout to a ScrollView defined in the main.xml file.

ScrollView theScrollView = (ScrollView) findViewById (R.id.scroll_view); TableLayout theList = new TableLayout(this); ArrayList<LinearLayout> theArray = Edit.getTheArray();

if (theArray.size() > 0) { for (int i = 0; i < theArray.size(); i++) { theList.addView(theArray.get(i)); } theScrollView.addView(theList); }

A second activity (Edit) is used to convert user input into a new LinearLayout and put it in the ArrayList. The code works successfully on the first item in the Array, however, after adding a second LinearLayout to the ArrayList and returning to the main activity, I get a force close and the following error: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.

I can't seem to figure out what is happening here. Is there another method I should be using to get my desired results?

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Android :: Adding Textview To Linearlayout Dynamically?

Nov 17, 2010

I try to add a texview to linearlayout dinamiclly such as in the following code, but it doesn't appear when i run the application ?

setContentView(R.layout.advanced);

m_vwJokeLayout=(LinearLayout) this.findViewById(R.id.m_vwJokeLayout);
m_vwJokeEditText=(EditText) this.findViewById(R.id.m_vwJokeEditText);
m_vwJokeButton=(Button) this.findViewById(R.id.m_vwJokeButton);
TextView tv=new TextView(this);
tv.setText("test");
this.m_vwJokeLayout.addView(tv);

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Android :: ListView AddHeaderView Gives ClassCastException When Adding LinearLayout

Jun 18, 2009

I've been trying to add a linear layout to a listview header. The listview appears fine and is working as expected, but when i try to add a linearlayout to the header i get a java.lang.ClassCastException: android.view.ViewGroup$LayoutParams occuring at the list.addHeaderView (ll); line. I thought it might be something in the complex layout i had so i switched it to just a linearlayout with a colored background and still got the same error. The end result i an trying to get is a list with a header that is all scrollable.

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Android :: Linearlayout Does Not Allow Vertical Scroll After Adding Dynamic Edittexts

Jun 11, 2009

<LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/Layoutbuttons"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/Bsave" android:text="Save"></Button> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Clear" android:id="@ +id/Beditclear"></Button> </LinearLayout>

<LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/Ledititems" android:orientation="vertical" android:scrollbars="vertical" android:scrollbarStyle="insideInset" android:scrollbarAlwaysDrawVerticalTrack="true" android:fadingEdge="vertical" android:fadingEdgeLength="8px"></ LinearLayout>
</LinearLayout>

I am adding dynamicly created EditTexts to the last vertical LinearLayout:

ArrayList<EditText> arrayedititems; edititems = (LinearLayout) findViewById(R.id.Ledititems);
arrayedititems.add( new EditText(globalcontext) ); //multiple times to add many EditTexts .... edititems.addView(arrayedititems.get(lastindex) );

Now all the edittexts are being added fine and show up on the linearlayout, the problem is I get no vertical scrollbar and can not scroll the linearlayout (you can a see large number of failed attemptes in the xml entry to enable this scrolling, such as forcing scrollbars or setting to vertical) Do I need to call some sort of invalidate() or notifyDataSetChanged() like with an arrayadapter to update the LinearLayout into checking if it needs to enable scrolling?

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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 :: Alignment Of View Elements Within LinearLayout

Feb 7, 2010

I have a vertical LinearLayout that contains a custom View that I've defined in my app and and a TextView. I'd like my custom View to be aligned on the top of the screen and the TextView to be aligned at the bottom of the screen. Unfortunately, no matter what changes I make to the attributes of the XML file, my custom View always seems to be centered vertically when I run the emulator. The xml is like the following:

<LinearLayout.............

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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 :: Adding To LinearLayout Another Layout And Handle This Layout In Separate Activity

May 6, 2010

I have an Activity which uses a layout with a LinearLayout in it. Now I want to create in runtime a subactivity which loads some other layout and add this layout as item of my LinearLatout.

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Android :: How To Layout View Right Aligned And Bottom Of An LinearLayout

Apr 18, 2010

I am trying to layout 1 textview (upText) left aligned and 1 textview (downText) and an image view (image) both on the same line and right aligned.

How can I do that? I tried that, but both 'textview' and image view at left aligned.

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

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Android : Create My Custom View Inside A Linearlayout?

Sep 24, 2009

I try to create my custom view inside a linearlayout. For example

<View android:id="@+id/ViewPaint" class="com.example.android.helloactivity.HelloActivity$DrawingView"/>

In the java source I created a DrawingView class which extends View. Unfortunatly it does not get instantiated. I tried to overwrite the ondraw() but without success. Code...

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Detecting ID Of Child View In LinearLayout

Jan 2, 2012

how to detect the object I've clicked on within a LinearLayout which itself is a child window within a gridview. I've tried a few methods which I thought would work but none of them work. Within the gridview I can detect the correct child window (which in this case is the Linear Layout) but I cannot figure out how to detect the object within the LinearLayout itself.

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Android :: Why Setting TextView.Ellipsize As Marquee Cause Its Sibling View In Linearlayout Redraw

Feb 3, 2010

We are using TextView's Ellipsize function to scrolling text in it and there many other controls in our window. We noticed CPU would go up to 50% if text started scrolling. After digging deeper, we found all controls in our layout kept drawing when texts scrolling. We wonder why? And how to avoid all controls redrawing?

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Android :: TextView Inside LinearLayout Stretches The LinearLayout

Aug 21, 2010

If I have 2 LinearLayouts split %50/%50 everything is fine. Weights are 1 and 1. As soon as I add a TextView inside the top LinearLayout, it stretches that layout. I use "wrap_content" as the documentation says I should when it comes to weights. As you can see the red and green should be split evenly and text on grey background should be inside red box.

Here is the code:..............

Now if I switch to "fill parent" as follows it actually works but it creates another problem. Here is the code (so far so good):

So looking at above we were forced to use "fill_parent" and we would think like we fixed the problem but here is the problem if we are using "fill_parent" (I took out the textview just to show the problem, textview doesnt make the problem go away anyways):

As you can see I assign the weights 3 (top red) and 2 (bottom green) but what actually happens is they get flipped: The red becomes 2 and bottom becomes 3. Just measure the pixels too see.

Here are the results of the 3 codes: http://imgur.com/iVt8g.jpg

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Android :: Bottom Of One LinearLayout Being Hidden By Other LinearLayout

May 25, 2010

I have a RelativeLayout that has two LinearLayouts in it. One is a bunch of TextViews and EditTexts that make up a form and the other is a ButtonBar that submits the form.

anyways, everything looks great in portrait, but when i switch to landscape mode the bottom TextView/EditText element is being hidden by the buttonbar.

screenshot to show the problem. as you can see some of the "email" textview and all of the email edit text are being hidden by button bar.

http://i45.tinypic.com/2dt7qmt.jpg

and xml:

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

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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 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?

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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 :: 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 :: 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 :: LinearLayout In LinearLayout

Jun 25, 2009

Why is the following code causing an exception? The Code throws a "mBaselineAlignedChildIndex of LinearLayout set to an index that is out of bounds" exception.

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

If l2 is dont added to l1 than it works.

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Motorola Droid :: Adding Contacts To Phone W/o Adding To Gmail

May 3, 2010

I want to add a contact just to my phone and not to my gmail account.Whenever I start to add a contact (phone, 208544.menu, +contact, create new contact,) the next thing it forces me to do is to choose an account to create the new contact under and it lists my 3 gmail accounts.I have no option to just put it on the phone.Any ideas here?We do the same thing on the Incredible but it gives us the gmail account and the phone to choose from but not on the Motorola.

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