Develop Reference

LinearLayout expanding elements

I have a imageView and a linear layout inside a linear layout. It looks like this:
What I want to happen is have the second linear layout with all of the buttons and params be a fixed height, and then have the image view height be dynamic depending on whatever the size of the screen is. So if there is a large screen then the image will be large and the button and sliders will always be the same.
Here is a snippet of what I have:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
>
<ImageView
android:id="#+id/imgPreview"
android:layout_width="match_parent"
android:layout_height="400dp"
android:visibility="visible"
android:layout_gravity="center_vertical|right"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:scaleType="centerCrop"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="fill_parent">
Is there an easy way to do this?

You can do this by giving the ImageView a layout_height of 0dp and setting its layout_weight to 1. The inner LinearLayout will have its layout_height set to wrap_content.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" >
<ImageView
android:id="#+id/imgPreview"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:visibility="visible"
android:scaleType="centerCrop" />
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<Your button and slider content here>
</LinearLayout>
</LinearLayout>

Yes, you can do this using:
android:layout_height="0dp"
android:layout_weight="YOUR VALUE"

Android layout with 2 images leaving whitespace at the bottom

I am trying to create a layout that would always display 2 images, splitting the screen length equally into half, leaving no whitespace on screen (even if the images are center cropped).
So far I have the following code, but this leaves a lot of empty white space at the bottom of the screen. The reason I use "RelativeLayout" within the "LinearLayout" is because I want my text1 view to come at the lower portion of my image 1 (overlapping the image1).
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="230dp"
android:layout_marginBottom="3dp" >
<ImageView
android:id="#+id/img1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:contentDescription="#string/picture"
android:scaleType="centerCrop" />
<TextView
android:id="#+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center"
android:padding="5dp"
android:textColor="#fff" />
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="230dp"
android:layout_marginBottom="3dp" >
<ImageView
android:id="#+id/img2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:contentDescription="#string/picture"
android:scaleType="centerCrop" />
</RelativeLayout>

You are hardcoding the height to 230dp for each layout which could be causing the problem. In the Linear layout you should use weights to distribute the screen area equally.
Use android:layout_weight="1" in both the relative layouts
Check here for more information
Android: 2 relative layout divided in half screen

The layout you are describing is a simple, weighted LinearLayout. Simply add the following attribute to your LinearLayout:
android:weightSum="2"
Then for each RelativeLayout, change the height attribute to:
android:layout_height="0px"
And add the following attribute to the same RelativeLayouts:
android:layout_weight="1"

try to use the frame layout if you want to overlap the textview on image view and use layout weight on the frame layout
Sample code for layout xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_weight="0.5" >
<ImageView
android:id="#+id/img1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:scaleType="centerCrop" />
<TextView
android:id="#+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Test"
android:gravity="center"
android:layout_gravity="center_vertical|bottom"
android:padding="5dp"
android:textColor="#android:color/black" />
</FrameLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="3dp"
android:layout_weight="0.5" >
<ImageView
android:id="#+id/img2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:scaleType="centerCrop" />
</FrameLayout>

Android Scroll view Image and text

I am solving a problem with image and text in one scroll view. The main problem is, that I get different image height from server side . But the place with image should be all the time same.
Now the height of image place is dynamic. The text should be scrollable with the image.
Is there any possibility how to make the image height static?
Thank you!
EDIT
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<RelativeLayout
android:id="#+id/article_gallery"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="4" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:id="#+id/article_image_back"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="#drawable/sipka_l" />
<ImageView
android:id="#+id/article_image"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1" />
<ImageView
android:id="#+id/article_image_next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="#drawable/sipka_p" />
</LinearLayout>
<TextView
android:id="#+id/image_desc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#color/tran_dark_gray"
android:gravity="center"
android:padding="#dimen/size_8"
android:textAppearance="#style/xsmallLight" />
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="6"
android:background="#color/opaq_light"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="#dimen/size_16" >
<TextView
android:id="#+id/article_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="#dimen/size_12"
android:textAppearance="#style/normalBold" />
<TextView
android:id="#+id/article_body"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="#style/xsmall" />
</LinearLayout>
</ScrollView>
</LinearLayout>
</FrameLayout>

If you declare the ImageView with a fixed width and height it will remain static all the time.
Try something like:
<ImageView
android:id="#+id/imageView1"
android:layout_width="50dp"
android:layout_height="50dp"
/>
Put this ImageView inside a ScrollView and ofcourse put your TextView inside the same ScrollView.

you can use layout weights for your linearlayout. Set the width to 0 and let the weight determine actual size. Setting weight to 0.33 each gives each images 1/3 of the screen.
Or you could set one to 0.5 and the others to 0.25 each or whatever makes sense for your app.
Set the 3 images as:
<ImageView
android:id="#+id/article_image_back"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="0.33"
android:layout_gravity="center_vertical"
android:src="#drawable/sipka_l" />

ScrollView with LinearLayout inside does not work

I have a scrollView with two inside LinearLayout but it does not work, the listView does not show all items but only a few. How can I do?
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:id="#+id/welcomeView"
android:layout_width="250dp"
android:layout_height="100dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dp"
android:gravity="center"
android:orientation="horizontal"
android:weightSum="100" >
<ImageView
android:id="#+id/image_User_welcome"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_weight="70"
android:src="#drawable/user" />
<TextView
android:id="#+id/private_area_welcome"
style="#style/CoopLabel"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_weight="30"
android:text="#string/private_area_welcome" />
</LinearLayout>
<LinearLayout
android:id="#+id/layout_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_below="#+id/welcomeView">
<TextView
android:id="#+id/private_area_lists"
style="#style/CoopLabel"
android:layout_width="280dp"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/linearLayout1"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:gravity="center"
android:text="#string/private_area_lists" />
<ListView
android:id="#+id/privareaList"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:textColor="#000000" >
</ListView>
<ImageButton
android:id="#+id/logoutBtn"
android:layout_width="160dp"
android:layout_height="35dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:padding="0dp"
android:scaleType="centerCrop"
android:src="#drawable/tasto_logout"
/>
</LinearLayout>
</RelativeLayout>
</ScrollView>

It is not recommended to use scrollables containing other scrollables - your layout contains ListView inside Scrollview.
You can design your layout as a ListView - you can add header and footer views(welcomeView, logoutBtn, etc..) to the top and bottom of listview - see methods ListView.addHeaderView and addFooterView) - scrolling will be managed by ListView,
or you can replace listview in your original layout with simple LinearLayout and populate it manually row by row(do not forget to assign click listeners to rows etc..) - scrolling will be managed by ScrollView.
To find more information about this problem, try to google "android listview inside scrollview", i am sure it will help you. :-)

How to avoid space between imageview and gridview in linearlayout

I have a image view and grid view in my .xml file. When I am executing this file its getting some space between grid view and image view. How to avoid this space...can any one help me to solve this problem.
thanks in advance...
my xml code is:
android:layout_width="0px"
android:layout_height="0px">
</Button>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/prevMonth"
android:src="#drawable/cal_left_arrow_off2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
<Button
android:id="#+id/currentMonth"
android:layout_weight="0.6"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="#drawable/calendar_bar2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</Button>
<ImageView
android:id="#+id/nextMonth"
android:src="#drawable/cal_right_arrow_off2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
</LinearLayout>
<LinearLayout
android:layout_gravity="bottom|center_horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/calendarheader"
android:src="#drawable/blue_bg_with_text2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
</ImageView>
</LinearLayout>
<GridView
android:id="#+id/calendar"
android:numColumns="7"
android:layout_gravity="top"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</GridView>

You should try setting the android:gravity attribute correctly, and it has to work:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:gravity="bottom|center_horizontal"
android:layout_width="fill_parent" android:layout_height="wrap_content">
<ImageView android:id="#+id/calendarheader" android:src="#color/blue_start"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:minWidth="250dp" android:minHeight="30dp">
</ImageView>
</LinearLayout>
<GridView android:id="#+id/calendar" android:numColumns="7"
android:layout_gravity="top"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:background="#color/blue_start">
</GridView>
</LinearLayout>
i'm using here simple color background, and there is no gap:
If you still having the problem, then you should see your blue_bg_with_text2 image, whether it has any empty pixels at the bottom.
ps: ignore the android:minWidth="250dp" android:minHeight="30dp" part, it is there to imitate an image with that size.
Update
Here is the same view using RelativeLayout (it's a bit clearer at least for me):
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:id="#+id/selectedDayMonthYear"
android:textColor="#000000" android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="0px" android:layout_height="0px" />
<ImageView android:id="#+id/prevMonth" android:src="#drawable/cal_left_arrow_off2"
android:layout_width="wrap_content" android:layout_height="wrap_content" />
<ImageView android:id="#+id/nextMonth" android:src="#drawable/cal_right_arrow_off2"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_alignParentRight="true" />
<Button android:id="#+id/currentMonth" android:layout_weight="0.6"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="#drawable/calendar_bar2" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/prevMonth"
android:layout_toLeftOf="#id/nextMonth"
android:layout_alignBottom="#id/prevMonth"
android:layout_alignTop="#id/prevMonth" />
<ImageView android:id="#+id/calendarheader" android:src="#drawable/calendarheader"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="25dp"
android:layout_centerInParent="true"
android:layout_below="#id/currentMonth"
android:layout_margin="0dp"
android:scaleType="fitXY" />
<GridView android:id="#+id/calendar" android:numColumns="7"
android:layout_gravity="top" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/calendarheader"
android:layout_margin="0dp"
android:background="#color/white_fader_end">
</GridView>
</RelativeLayout>
I've added to it my resources as background (two of them are actually screenshots from yours).
What i observed is, you must
either use a static image for your
calendar header background, or,
if you use an xml drawable, you have
to drop the stroke element from it / set its android:width to 0
otherwise it will add an unnecessary gap around your view's drawable, that is as wide as the stroke width you've specified.
my output using static images as backgrounds looks this way:
Update 2
The problem is not between your calendar header and gridView, but inside your gridView.
It has a 'padding' of 5 px inside (not real padding, see how it gets there):
The default selector for the GridView is a 9x9 patch rectangle with a border of 5px.
That 5 px is visible all around your gridView.
You can specify a different listSelector for this grid either by xml:
android:listSelector="#drawable/grid_selector"
or from code (onCreate):
gridView.setSelector(R.drawable.grid_selector);
Now if your grid_selector is an image or is a drawable xml without any margins, then the gap that causes the problem is gone.
You can also hide that gap, by setting a background color to your gridView, that matches or grandients the calendar header's background color.