I have a tableview inside of a scrollview. I want to reserve space for a listview 2/3 of the screen. I am getting the height of the screen, and will divide that in 2/3 and set the height of the ScrollView. But even with manually x and y numbers its blowing up.
App is crashing when I set the ScrollView width and height like this:
ScrollView sv = (ScrollView)findViewById(R.id.usdScroll);
ScrollView.LayoutParams layoutParams = new ScrollView.LayoutParams( -1, 550);
sv.setLayoutParams(layoutParams);
Any ideas what I did wrong?
You can use the layout_weight attribute to specify how much of a view the specific component will use, e.g. android:layout_weight=2. So for your listView set a weight of 1 and a weight of 2 for your tableview, I think. Anyway, play with the weight setting and you can split the view in any ratio you like.
LayoutParams is used to tell their parents how they want to be laid out. So the layout param's type which you set to must match its parent class type exactly.
and here is a better solution, using layout_weight instead. Try this please
<ScrollView android:layout_weight="1" ........></ScrollView>
<ListView android:layout_weight="2" ........></ListView>
Related
I want to give responsive height to children in a vertical Linearlayout for example(some view height must be 25% of the screen height) I know this is simple if I use weight but the problem is that I have the LinearLayout inside a ScrollView this means I dont know the exact height of the LinearLayout so weight doesn't work here.can anyone give me a way to do so.
Use:
scrollView.setFillViewport(true)
This way, the linear layout inside occupies the full height.
I'm struggling with getting LinearLayout to behave like I want it. Unfortunately, both dimension modes MATCH_PARENT and WRAP_CONTENT don't seem to fit for my purposes.
Here's why: I want the child that is added to the LinearLayout to be completely visible. Nothing should be cut off. So normally, I should use WRAP_CONTENT to achieve this behaviour.
But, if there's more space in the LinearLayout than the child really needs, I also want it to fill that space. This is of course what MATCH_PARENT is for.
However, I can't use MATCH_PARENT because in case there is less space in the LinearLayout than my child needs, using MATCH_PARENT will cut off the child which I don't want.
So this leaves me somewhat puzzled as to how I can achieve what I want: How can I allow a child to fill additional space in the LinearLayout (if available) while at the same time forcing the LinearLayout to be at least as big as the child needs in order to be completely visible?
Put your child view inside a ScrollView with width MATCH_PARENT, height MATCH_PARENTand set both the child's dimensions MATCH_PARENT
Instead of using MATCH_PARENT for your child, use WRAP_CONTENT and set your child's weight to 1,So it will take all the empty space in your LinearLayout. Suppose your LinearLayout's height is 128dp, and your child 's height is 56dp, your child will be 128dp . If you set WRAP_CONTENT on your LinearLayout, it will be 56dp, and it child will still take all the place it needs.
If you want your LinearLayout to have a minimum width or height, and not match_parent, you can do setMinimumWidth() or setMinimumHeight() in your xml layout or in your code programmatycally depending your childs default height and width.
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.
In framelayout, if I want to put a view in the position that starts from 1/2 of the screen width. How can I do it? Thanks.
You can accomplish that in multiple ways. It only depends if you really need to stick with the FrameLayout.
Two easiest would be those:
FrameLayout - you would need to know whats the width of the layout (so if your layout is wrap_content it might get tricky). Set your view's gravity to left, and set its margin_left to half of the layout's width.
LinearLayout - either put it inside your FrameLayout (not very good practice), or (if you can) swap it with your FrameLayout. Set it's orientation to horizontal, add dummy view with width = 0dp, weight = 1. Then add your view with the same values for width and weight.
I have a nested TableLayout (TableLayout->TableRow->TableLayout->TableRow). The inner TableLayouts have their width set to MATCH_PARENT. It is not expanding to match its parent. See attached screenshots.
EDIT:
I can tweak the width using android:weight and setting the android:layout_width="0dp". I still want to understand this behaviour.