I have LinearLayout compoment which contains ListView and ImageView.
According to the documentation layout area should be scrollable if element's height is bigger than LinearLayout's area.
But scroll is not available.
I can scroll only when listview contains a lot of elements. But in this case ImageView component is not visible at all.
Using ScrollView is not allowed because ListView has his own Scroll element.
Could you please advice what should I do?
Here is part of my xml file:
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="#id/top_header"
android:layout_above="#id/bottom_menu"
android:layout_weight="1"
android:id="#+id/sub_content_view">
<ListView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/eventsListView"/>
<ImageView
android:layout_width="fill_parent"
android:layout_height="260dp"
android:id="#+id/empty_area"
android:adjustViewBounds="true"
android:background="#drawable/empty_area"
android:contentDescription="#string/contentDescription"/>
</LinearLayout>
If you ListView is not empty, you may register the ImageView as list footer, it then scrolls with the ListView. However, footers are not displayed if the list is empty, so you'd have to add the ImageView to the empty view as well.
First 2 comments than a possible solution
(1) ListView won't be scrollable when there's nothing in it. Instead it will display an empty view which you can set either programaticlly or with XML (usualy a text view that says something to the extent of "your list is empty").
(2) Your ImageView is set for a fixed height while your ListView is set to wrap_content. As a result, when your ListView contains enough elements that is is larger than the area of the screen it will push your ImageView out of view. As I have yet to see a LinearLayout or RelativeLayout suddnely become scrollable if there's more stuff on the screen than there is space (I just tried to make it happen) I'm not surprised by what you're describing.
You're right that using a ScrollView with a ListView as a child is disfavored. What I would try is - instead of putting both the ListView and ImageView in the same LinearLayout - separate the two. I don't know the rest of your XML but if you moved the ImageView out of that layout element you should be able to position it below the part containing the ListView such that - regardless of the size of the list - the ImageView will remain in the same place.
The suggestion above to use a footer may work, however, a footer is pinned to the bottom of the list. That means, if your list is really long, there will be a point at which the footer is not visible unless you scroll down far enough that it is exposed. If you want the image to remain visible all the time, e.g. have the list scroll behind the image, then you need to use a different approach.
Related
I have this structure
<LinearLayout
android:id="#+id/1">
<LinearLayout
android:id="#+id/2" />
<LinearLayout
android:id="#+id/3">
<ListView
android:id="#android:id/list" />
</LinearLayout>
</LinearLayout>
And I populate the ListView with some data. Well my problem is that the ListView becomes scrollable (while the LinearLayout number 1 fits the screen without scrolling), but what I want is this View to become full height and that the LinearLayout with id=1 becomes scrollable.
Inside ListView number 2 I have some TextViews, etc.
ListView's are scrollable by default if when the content is more than its display area.
However, LinearLayout would need to have a ScrollView in order to scroll.
Red Alert - You cannot use ScrollView and ListView together. You will end up seeing un-expected.
Alternate Solution: Prioritize what is more important to you, if scrolling the entire screen then add a ScrollView (provided your ListView items are static) else I will to wait to hear a good solution on this one. :)
Add ScrollView for ListView.
ScrollView will work for only one child view, so you have to add like this
LinearLayout
LinearLayout
LinearLayout
ScrollView
ListView...../ListView
/ScrollView
/LinearLayout
im trying to insert 6 gridviews with 6 imageview above each of them ! the problem im facing is that i cant scroll my page to see all my girdviews the first gridview seems fine as it wraps all its contents and set the height to it the second gridview shows only first row and make it scrollable but i can't see my other gridviews i want a layout like
--ImageView--
--GridView1--
--ImageView--
--GridView2--
--ImageView--
--GridView3--
and so on
<LinearLayout>
<ImageView />
<GridView />
--
--
<GridView6 />
</LinearLayout>
i have tried using scrollview and all but couldn't get the results !
Thanks
Hee is how you can do this. Check the answer here. It is an expandable height GridView, which you will want to import / create in your project. What that basically means is that as more items are added to the GridView, it will just expand its height, as opposed to keeping its height set and using scrolling. This is exactly what you want.
Once you have the ExpandableHeightGridView in your project, go to your XML layout where you want the GridView to be. You can then do something like this (paraphrasing):
<ScrollView ...>
<RelativeLayout ...>
<com.example.ExpandableHeightGridView ... />
<other view items />
</RelativeLayout>
</ScrollView>
Then, in your activity where you set the GridView's adapter, you want to make sure you set it to expand. So:
ExpandableHeightGridView gridView = (ExpandableHeightGridView) findViewById(R.id.myId);
gridView.setAdapter(yourAdapter);
gridView.setExpanded(true);
The reason you want this expandable GridView is because, the fact that a standard GridView doesn't expand is what causes it to scroll. It sticks to a certain height, and then as more items fill it past its view bounds, it becomes scrollable. Now, with this, your GridView will always expand its height to fit the content within it, thus never allowing it to enter its scrolling mode. This enables you to use it inside of the ScrollView and use other view elements above or below it within the ScrollView, and have them all scroll.
This should give you the result you're looking for. Let me know if you have any questions.
I have a listView that expands upwards instead of downwards.
I have another listView on another page that works just fine and populates itself from the top -> bot.
Why does my listView start from the bottom instead of the top?
My XML
`
<ListView
android:id="#+id/list_view_showRegister"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/showRegister"
android:layout_alignParentLeft="true"
android:layout_marginTop="50dp"
android:clickable="false" >
</ListView>`
Your ListView is still actually populating from the top downwards. Just not from the top of the page.
You have set the layout_height="wrap_content" and the layout_above="#+id/showRegister". With the height being wrap_content, the view will only be as large as it's contents. Then, due to the fact you have used layout_above, it will be directly above another view.
The listview is not filling from the bottom, it is filling from the top (of the listview) - but the listview itself is only starting from halfway up the screen. Anything above the listview is not actually part of the listview, but empty space instead.
The solution is to either set the layout_height="match_parent", or remove the layout_above tag.
I know this is an old question but I hope this helps anyone else who may have found this issue via google.
Have a look a these links. Is it possible to make a ListView populate from the bottom?. populating from bottom.
Add new items to top of list view on Android?. Add new item at the top of list.
See for android:stackFromBottom attribute.
To allow users to submit comments, I have 2 views, vertically stacked. A ListView for displaying entered comments and a LinearLayout footer, for allowing the user to add a comment (which is basically an EditText and a button).
The footer must be anchored to the foot of the screen and the ListView must sit above it. Its similar to what you see on facebook for Android when you are adding comments.
However I don't want the ListView to initially take up the full space - I want it to take up only the space required to display its rows, but to be able to grow into the remaining space as the user adds comments - while always staying above the footer layout.
I've tried a LinearLayout as suggested here Android: How can you align a button at the bottom and listview above?
However, this results in the ListView taking up all the space above the footer - when there is only a couple of comments - so its mainly empty and looks weird.
I have tried a RelativeLayout parent, where the footer is anchored using android:layout_alignParentBottom="true"..... Positioning the ListView above the footer using android:layout_above="#id/footerLayout" forces the same behaviour as above (ListView takes up all remaining space)... removing this allows the ListView to 'grow' but it overlaps the footer if its grows too big.
Cheers.
I guess this workaround will work!
<LinearLayout
layout_width="MATCH_PARENT"
layout_height="MATCH_PARENT"
orientation="vertical">
<LinearLayout
layout_width="MATCH_PARENT"
layout_height="0"
android:weight="1"
orientation="vertical">
<YOURLIST
layout_width="MATCH_PARENT"
layout_height="wrap_content"
/>
</LinearLayout>
<YOURVIEW
android:layout_width="MATCH_PARENT"
android:layout_height="WRAP_CONTENT"
android:weight="0"/>
</LinearLayout>
I guess one way to do it would be using the android:fillViewport attribute in the XML. See this blog post by Romain Guy: http://www.curious-creature.org/2010/08/15/scrollviews-handy-trick/
I have a ListView which can contain any number of items. When it uses less than the whole height of the screen I want to show a footer which fills the remaining space.
The footer is just a tiled image. I can't just set it as the background of the ListView or its container, because the list items are partially transparent and it must be the main background and not the footer visible through them.
Adding the footer view works fine if the footer is of a fixed height, but if the fixed height is more than the remaining height then the ListView scrolls unnecessarily.
Making the footer view fill_parent seems to have no effect, it's just invisible.
Putting the footer view into the parent layout also has no effect, because the ListView seems to fill the whole height unless it's given a fixed layout_height value.
Is this possible?
Try setting the layout weight to one, or check out trying a merge view:
http://android-developers.blogspot.com/2009/03/android-layout-tricks-3-optimize-by.html
Put the ListView inside of another layout set the expand to fill the screen.
A LinearLayout works best for this.
Something like this:
<LinearLayout android:layout_height="match_parent"
android:layout_width="match_parent" >
<ListView android:layout_height="match_parent"
android:layout_width="match_parent" >
...
</ListView>
</LinearLayout>
This should fill the LinearLayout to the bottom of the screen. You can use this behavior to control how your View looks.
Hope this helps!
Try this and tell me if it works:
Put the two in one parent layout (for example: Linear Layout)
For ListView: android:layout_hight="wrap_content"
For footer: android:layout_hight="fill_parent"