i have 5 text views to be added horizontally,and it needs to occupy the displaywidth.When i change the screen orientation,it should change based on it.Is that can be done by Layout or it should be done programmatically
Try using layout_weight parameter. Create a LinearLayout with layout_width="fill_parent" and layout_weightsum="5".
And then add 5 TextViews with layout_width="wrap_content" and layout_weight="1".
You could do that by using android:layout_width="fill_parent" in your text view. This attribute specify that your text views will take up all the parent space in width.
EDIT
Hi..Table layout has a slightly different behaviour.
Quoted from TableLayout:
The width of a column is defined by
the row with the widest cell in that
column. However, a TableLayout can
specify certain columns as shrinkable
or stretchable by calling
setColumnShrinkable() or
setColumnStretchable(). If marked as
shrinkable, the column width can be
shrunk to fit the table into its
parent object. If marked as
stretchable, it can expand in width to
fit any extra space. The total width
of the table is defined by its parent
container. It is important to remember
that a column can be both shrinkable
and stretchable. In such a situation,
the column will change its size to
always use up the available space, but
never more. Finally, you can hide a
column by calling
setColumnCollapsed().
The children of a TableLayout cannot
specify the layout_width attribute.
Width is always FILL_PARENT. However,
the layout_height attribute can be
defined by a child; default value is
WRAP_CONTENT. If the child is a
TableRow, then the height is always
WRAP_CONTENT.
hope this helps
EDIT
When stretchable, a column takes up as much as available space as possible in its row
Suppose you have added the five textview in a column at index col_index in your table. This code will stretch the column.
<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="col_index"
>
...
</TableLayout>
Related
I have the following requirement in Android:
Given a horizontal LinearLayout, I have five buttons in it. All the buttons should have equal width and height. The height of each button is same as their parent LinearLayout and spacing between them should remain constant. The height of LinearLayout is not constant and depends on form factor and other layouts sizing. Therefore, I can not assign fixed with/height to each button.
While I can easily achieve that very easily in iOS with the help of constraints, I am not sure how to achieve this in Android at design time. Is there some way to achieve this or is it possible programatically only?
The height of each button is same as their parent LinearLayout
Set the height to match_parent
For your width, you'll have to calculate the screen size programmatically and set the widths accordingly. See this question.
Try this . As you have a horizontal LinearLayout with 5 buttons, for equal spacing of all buttons, you must first allocate the space to each button of of the total space available like this..
<LinearLayout
android:weightSum="5"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="allocate it programatically"
/>
This button shown above has to be for all 5 buttons u have. The idea allocating weight sum of 5 to LinearLayout and then dividing it as 1 to each button. Note the width here for the button should be 0dp.
Then dynamically change your button Height and Width per your requirement
Unfortunately no typical layout in Android seems to have the concept of this kind of layout constraint (square like elements).
It's the layout that ultimately determines the sizes of their children. Therefore if you want that you have to write your own layout implementing this constraint.
For this extend ViewGroup and in onLayout enforce that width of the children or a specific children equals height. You could even invent your own LayoutParams for this task. See the documentation of ViewGroupfor a general example. The exact implementation very much depends on which other requirements you have for your layout.
I'm trying to implement a tabular layout that has a header and a bunch of rows underneath it. I've chosen the GridLayout (android.support.v7.widget.GridLayout) as there's some requirements for some elements to span multiple columns (but those are of no concern to the question).
My header cells each contain a LinearLayout with a bunch of TextViews, they're dynamically filled in code,for the sake of example, have a look at the image below.
The second row should contain the divider which is a simple view, that should span my header columns (3).
The problem is the width of the divider - if I choose MATCH_PARENT, it will push the GridLayout to fill the whole remaining space to the right. The grid needs to wrap the content and center itself horizontally. It seems to me there's a conflict between the grid's layout (WRAP_CONTENT) and the divider's layout (MATCH_PARENT).
How can I fix the width of the divider without hardcoding it?
http://i61.tinypic.com/2415eg5.png
In red, my LinearLayouts (header), green, the GridLayout itself, the thin blue line at the bottom is the divider.
Thanks,
MO
SOLUTION (as provided below):
I had to set the column weight for the divider to 1, without specifying a width (actually setting it to zero). Because of my specific requirement to handle all of these in code, the solution was to manually instantiate the GridLayout.LayoutParams class and use
ColumnSpec = GridLayout.InvokeSpec(row_index, num_spanned_cols, weight)
Hope this helps others in the future.
If you set the width to 0dp then give it android:layout_weight="1"
(you could give it any weight you want) it should fill all the available space and not push your bounds if I understand what you are asking correctly
For the following code:
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="2" >
Does android:stretchColumns="2" mean that the 3 columns are stretchable, or that column 3 is stretchable?
A TableLayout can specify certain columns as shrinkable or stretchable
by calling setColumnShrinkable() or setColumnStretchable(). If marked as shrinkable, the column width can be shrunk to fit the table into its parent object. If marked as stretchable, it can expand in width to fit any extra space. The total width of the table is defined by its parent container.
Have a look here, keep in mind that if your table fits nicely ( no space left to stretch) in the parent object, you would not see any changes no matter what value you put in.
If u want to stretch all Columns u should use android:stretchColumns="*" it works also to android:shrinkColumns.
And this pro tutorial should explain all yours issues
http://www.onlinevideolecture.com/computer-programming/slidenerd/android-programming-course-android-tutorials-for-beginners/index.php?course_id=2369&lecture_no=59
android:stretchColumns="1" will stretch column 1
android:stretchColumns="0,1" will stretch columns 1 and 0.
I am having a hard time understanding how to change the width of columns when creating a table view.
I know you can set the width in pixels of a column but that is not what I want to do.
Say, for instance, I have 2 columns and want each column to take up half the screen. How do I do this without explicitly setting the pixels, so that my code can work on multiple screen sizes?
With a TableLayout? You can't do that easily. The closest you can get is to use android:stretchColumns="*" on your TableLayout element. That should allocate any extra whitespace evenly between the two columns.
Just set the TableRow layout_width="0dip"
and then set the two column layout_weight="1"
This will help you evenly divide a row.
I am displaying a table of values in my android application, and would like the columns to be distributed evenly in terms of size , instead of sizing according to content.
Been playing around with stretchColumns but couldn't manage to figure out the right combination, Any Ideas?
I had the same problem - I always only entered one number in android:stretchColumns, but you have to enter all columns that should be stretched. So if you have three columns, you have to write:
android:stretchColumns="0,1,2"
Or write:
android:stretchColumns="*"
Then all columns will have the same size. As a reminder, android:stretchColumns is an attribute for the TableLayout element.
You need to set BOTH android:layout_width="0dip" and android:layout_weight="1" for each view within a table row. I think this works because the weights determine the proportion of the EMPTY SPACE in the row used by the respective views, and since the width of all views is set to 0dip, the whole row is empty space, and hence with equal weights the views are all allocated the same proportion of the WHOLE width.
Use the android:layout_weight for the columns
You control the size of the columns by the size of their contents. If you want them all to be the same size, set that up via android:layout_width in the appropriate cells.
Whoever is still looking for solution, for me:
setting columns both shrinkable and stretchable did the trick.
I had pretty much the same problem as OP.