Android :: Change Nested Layout's Child View Group's Width In Java Code?
Oct 6, 2010
I have a layout xml file with a linear layout. One of the children is again a ViewGroup Relative layout. In my java code i want to change the width of this child Viewgroup for my requirements. I tried this
ViewGroup childViewGroup = (LinearLayout)findViewById(childViewGroup);
LayoutParams l = childViewGroup.getLayoutParams();
l.width = 360;
childViewGroup .setLayoutParams(l);
I couldn't do this because findViewById(childViewGroup) doesn't fetch ViewGroups it does only for Views. Note: I cant define a whole new layout.xml for this minor requirement since it is huge layout file and might cause performance overhead. I wanted to just change the width of the child view group in my java activity code.
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Jun 16, 2009
I have a custom view that I had to write for a large scrollable image, as the images are larger than the size of the screen. Before, I had tried to do it by putting the image into a ScrollView but that of course didn't work. The view itself is within a RelativeLayout within the activity and at the bottom of the screen I have two buttons that are used for navigation and at the top a TextView with a caption for the activity (the main header is already being used here for instruction). In my below code, I've checked the Hierachy Viewer to confirm all the elements are loaded and in the Activity I can see the TextView, however it overlays the ZN5ScrollView area and below the image I just have a blank area of the size defined rather than my buttons. For the bottom navigation, the Hierachy Viewer is saying the absolute_y of the bottom navigation is 480. I'm wondering if anyone can help with my layout code here to get this working correctly? Bottom navigation is 50px high, ZN5ScrollView is 365px above the navigation, and the TextView takes up the rest of the area at the top
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Aug 11, 2010
I want the view group to extend with the ScrollView if the content of the group is smaller than the display area of the ScrollView.
How can I have the ScrollView child extend to fill the parent if it's smaller than the parent?
CODE:.........................
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Feb 1, 2009
i know we can use XML to specify layout_weight.(refer to APIdemo LinearLayout9.java) but is there any method to specify it from code?
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Jan 28, 2009
how to set width of gridview from java code(dynamically), is there any function to specify the width of grid view dynamically.
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Aug 27, 2010
I have a PreferenceScreen that is defined in XML that serves all the preferences for my application. This PreferenceScreen also has a child PreferenceScreen nested within it. My implementing class is called PreferencesActivity. I know I can open the main Preferences window via startActivity(new Intent(this, PreferencesActivity.class)); but how do I go about opening the child PreferenceScreen via an Intent?
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May 20, 2010
I have a PreferenceScreen that is defined in XML that serves all the preferences for my application. This PreferenceScreen also has a child PreferenceScreen nested within it. My implementing class is called PreferencesActivity. I know I can open the main Preferences window via startActivity(new Intent(this, PreferencesActivity.class)); but how do I go about opening the child PreferenceScreen via an Intent?
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Oct 30, 2010
I have a two column TableLayout as the only child of a scroll view. The first column contains TextViews ('labels') and the second column contains EditText/Spinner/DateWidget etc ('values').
Even though I have have specified android:layout_width="fill_parent" for TableLayout, TableRow & all widgets (in 'values' column).
The screen looks perfect when the activity is created. However, when one types a really long value in the EditText, the 'values' column goes beyond the visible screen area.
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Aug 27, 2010
I'm an Android newbie. This should be the easiest thing in the world, but figuring it out is driving me batty: how do I get the dimensions of a view or layout?
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Jul 26, 2010
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="@+id/llAddNote"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginRight="8dip"
android:background="#CCFFCC">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="24dip"
android:text="Add Notes"/>
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="24dip"
android:layout_marginRight="24dip"
android:id="@+id/tlNotes"
android:stretchColumns="0">
</TableLayout>
<Button
android:id="@+id/bAddNoteLine"
android:layout_marginLeft="24dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ADD">
</Button>
<LinearLayout
android:id="@+id/llIndex"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="21dip"
android:gravity="center">
<Button
android:id="@+id/bSaveSubjectiveNote"
android:layout_width="192dip"
android:layout_height="wrap_content"
android:text="Save"/>
<Button
android:id="@+id/bDiscardSubjectiveNote"
android:layout_width="192dip"
android:layout_height="wrap_content"
android:layout_marginLeft="48dip"
android:background="@drawable/button"
android:text="Discard"/></LinearLayout>
</LinearLayout>
How to retrieve the index of linearLayout which has "llIndex" as id.
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Oct 5, 2010
Every time that I want to do a Layout, I'm getting a black layout preview then I can drop stuff on it, that's ok, but how can I change the size of that blank surface (xml). The question came because I set a folder layout-large and then when I add a new layout.xml to that folder it came with the same size, as a layout-normal.
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Sep 13, 2010
I'm trying to make a timeout gauge bar animation effect:The width of a lengthy colorful bitmap image is decreasing, but not x-scaling.so the image looks not changing and the visible area shrinks.I couldn't find the sole ImageView clipping or masking support in android.then changing the shrink_box's width will clip the portion of the still_image.But I failed to change the width of the view smoothly.I tried to change the LayoutParam.width in applyTransformation() but got an Exception, it seems not allowed. How can I make an Animation that changes the width of the view. OR is there a proper method to achieve the above effect?
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May 12, 2009
I'd also like a way to change the default, if possible.
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Jun 16, 2010
I want to set android:layout_centerVertical="true" property of layout through java code of an image.
How to achieve this. here is my code.
CODE:..................
I have tried using setScaleType(ScaleType.FIT_CENTER) but no use.
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Jun 8, 2010
I'm looking for an easy way for the user to see how many drinks they've had for a BAC calculator.
PICTURE OF THE APP, for reference
On button press, I would like an image to be added to the screen, directly under the spinner and with left alignment. When I press the button again, I want another image to be added to the screen.
So if I pressed the add beer button, a drawable of a beer would appear below the spinner. If I pressed the add beer button again, I want there to be TWO drawables of beers under the spinner, preferably with them being added from the right.
(Also, having them reach their width limit, wrapping around, and starting again on the left, but below a full line, would be AWESOME)
I can't figure out how to do this. I assume adding a ImageView in code to a relative layout (because it needs to be positioned to the right) would be the best route, but if it's possible in xml I'd be more than happy to use that.
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Feb 28, 2012
I'm trying to convert this 4 XML elements to put them into the java class, but I don't know how to do it.
Code:
<TextView
android:id="@+id/text_route_section_station"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
[code]....
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Nov 25, 2009
In my view i have the need to a somewhat different layout. It needs to display a table within each row a cell for a thumbnail and a cell for displaying a title and a description. The title and description should be displayed on top of eachother, so something like...
In this case i thought i'd use a nested table layout. code...
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Aug 2, 2010
I'm beginning to study Android and have a doubt. How do I open a new layout and code (xml and java) by clicking a button on the main scene?
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Aug 13, 2010
I want to dynamically add some views to a LinearLayout that is already defined in XML.
I'm able to add views to the screen but they are not being placed 'inside' the right LinearLayout.
How can I get a reference to this specific Layout from code, similar to getting a View by using findViewById()?
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Aug 2, 2010
I am trying to set up a ViewFlipper that changes a SlidingDrawers content each time a button is pressed. So far every view I set up worked fine, but now I am trying to create a ListView (including single_choice_mode) within a child view of the ViewFlipper, but my attempt only let to a NullPointerException. As I only discovered ViewFlipper today, I am not yet familiar with it and may not have understood it completely. if someone could give me a hand and help me find out what I have done wrong, that would be great. Here is what I have done:
The code for the onClick event of the ImageButtons:
public void onClick(View v){
if (v == btnExposure){
mFlipper.setDisplayedChild(0); }
else if (v == btnProperties){
mFlipper.setDisplayedChild(1);}
else if (v == btnSpecialEffects){
mFlipper.setDisplayedChild(2);.............
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Sep 20, 2010
i've got an ExpandableListView with my own layouts for the group and child views. a certain group-type will require a different layout. is that possible - i.e. a ELV with different layouts for a group view. i've got my own sub-class of SimpleExpandableListAdapter.
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Oct 2, 2009
is there a way to have a view use a different layout when an orientation change occurs. suppose i want the view to look one way in portrait and another way in landscape. all the same data, but arranged differently.I'm thinking one way to do this would be to have two different linear layouts with android:visibility="gone" and simply display the appropriate one (set android:visibility="visible") based on orientation -- i.e. do this from code.is there a way to do this in xml? or something like this (i.e. in landscape, put the textview here, in portrait, put it here instead)?
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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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Aug 18, 2010
I have a WebView inside the ScrollView. The content of WebView dyanamically changes when it displays different html page. I have the following issue: For example I have A.html, and B.html. The content of B.html is larger than A.html, so the page is longer. When WebView load B.html, the ScrollView stretches its size to enable itself scroll for B.html, then if I go back to A.html, ScrollView doesn't resize itself. (The scroll area is exceed the content of A.html) What I want to have, is dynamic change the scroll area of scroll view to fit the webview's content.
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Sep 30, 2009
something weird is happening when i inflate a particular view and i wonder whether i'm running into some kind of namespace collision inside the resource/class space.i have a few custom views in my app and generally i park them in discrete XML files. the views are declared.
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Jun 25, 2010
In my app i'm setting background to each child views in listview. So that listview default focus ( orange color ) is not focusing. Is there any way to set both ( listview focus & child view background)?
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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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May 18, 2010
I have a HorizontalScrollView with a series of CompoundButtons. I want to find the (x,y) for a given child view. I have tried using:
getLocationOnScreen()
getLocalVisibleRect()
getChildVisibleRect()
like this:
View tmpView = this.findViewById(viewId);
Rect hitRect = new Rect();
tmpView.getLocalVisibleRect(hitRect);
the hitRect is always 0,0 - 0,0.
I need the x,y mainly to scroll to a particular child view. Any help is greatly appreciated.
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Jul 27, 2010
Please advice how to set fixed heigh (in dip) for the child view of ListView component? I am using relative layout as root layout for the child view when I set backgoround image to relative layout it becomes very height (maybe because backgoround picture is large) and I want to set precisely the height in dp.
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Aug 2, 2010
I am trying to populate a ViewFlipper with a ListView when a certain button is clicked...but I only get a NullPointerException for lv.setAdapter(new ArrayAdapter<String>(this, R.layout.specialeffectsview, specialEffects)); To be honest I don't really know how to do this, I just learned about the ViewFlipper today and I haven't fully understood how to use it yet. If anyone could help me find how what I have done wrong, that would be great.
Here is the code I use:
public void onClick(View v){ if (v == btnExposure){
mFlipper.setDisplayedChild(0);
else if (v == btnProperties){ mFlipper.setDisplayedChild(1); }
else if (v == btnSpecialEffects){ mFlipper.setDisplayedChild(2); String[] specialEffects = getResources().getStringArray(R.array.special_effects_array); lv.setAdapter(new ArrayAdapter<String>(this, R.layout.specialeffectsview, specialEffects)); lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE); }
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