Develop Reference

Right way to have a scrollable bottom view

What is the right way to have a scrollable bottom view?
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
style="#style/wrnTextP1"
android:text="Ok , batatas "/>
<android.support.v4.widget.Space
android:layout_height="0dp"
android:layout_width="match_parent"
android:layout_weight="1" />
<Button
style="#style/FullWidthButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Chega por hoje!" />
</LinearLayout>
at the preview its looke fine, but when I run it on the emulator the view(in this case: the button) its not at bottom at all.

I think you are misunderstanding how ScrollView is meant to be used. The LinearLayout child of your ScrollView has a match_parent height... if your ScrollView is the same height as the screen, and the LinearLayout is the same height as the ScrollView, then there's nothing to scroll (all the content is the size of the screen).
The direct child of a ScrollView should either have a fixed height (like 2000dp) or use wrap_content.
If you use a fixed height, then the rest of your code "works"; you can have a Space element that uses layout_weight to push the last view down to the bottom of your LinearLayout. However, if you're using wrap_content, this is impossible (since there's no "extra" space for the layout_weight to consume).
Instead, you could consider putting the "bottom" view outside of the ScrollView. Something like this:
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
...
</ScrollView>
<Button
style="#style/FullWidthButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Chega por hoje!" />
</LinearLayout>

Android - position layout at bottom of screen always in the foreground

My xml file is like following:
<LinearLayout>
<ScrollView>
<LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
First LinearLayout has android:layout_height="match_parent", all others android:layout_height="wrap_content". How to create a layout at bottom of screen always in the foreground with an imageview?

This is best done with a relative layout. Relative layout elements stack on top of each other unless you position them relative to each other. For instance, if you had two image views and did position them, the second image view would be placed on top of the first one.
Here is an example to get you started:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</ScrollView>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_alignParentBottom="true"
android:contentDescription="#string/YOUR_CONTENT_DESC"
android:scaleType="fitXY"
android:src="#drawable/ic_launcher"/>
</RelativeLayout>

you could set the gravity of the linear layout to bottom.
android:layout_gravity="bottom"
When your creating your XML document order does matter. So for example:
<ImageView/>
<LinearLayout/>
The LinearLayout will be placed in front of the ImageView.

Try this way,hope this will help you to solve your problem with another one alternative.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
</LinearLayout>
</ScrollView>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_launcher"
android:adjustViewBounds="true"
android:layout_gravity="bottom|center_horizontal"/>
</FrameLayout>

How to make View fill remaining space

So I have a two "sections" to my screen. I have the top section which is a ScrollView and a bottom section which is random text. The random text at the bottom will always be changing sizes, so sometimes it can take 40dp, sometimes 20dp, etc.
My question is, is there a way to make the bottom part dynamic (without loss of text) and make the top scrollview adapt to the new size and restricts its own size to "fill the remaining space" based on what portion the bottom part is using?
Like this:
As you can see, the scroll view just fills the remaining space available.
I'm searching for a solution using XML only
Need HELP!

You can try this.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/bottomTextView">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="500dp"
android:background="#android:color/holo_red_dark"
android:text="Test" />
</LinearLayout>
</ScrollView>
<TextView
android:id="#+id/bottomTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#android:color/darker_gray"/>
Or
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="500dp"
android:background="#android:color/holo_red_dark"
android:text="Test" />
</LinearLayout>
</ScrollView>
<TextView
android:id="#+id/bottomTextView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/darker_gray"/>

Wrap both Views in a vertical LinearLayout;
The view which is at the top: height = "0dp", weight = 1
And the view which is in the bottom: height = "wrap_content"

linear layout doesn't fit to screen size

Why the linear layout inside a scroll view doesn't fit to the screen size?
I was trying to make some changes with the "Layout_Height" but doesn't succeeded.
This is my XML code:
Thanks for help!
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollViewPhysicalExam"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/background"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
style="#style/HeaderText"
android:orientation="vertical" >
<!-- ++++++++++++++++++ Row18 ++++++++++++++++++ -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="#+id/btnBack"
android:text="#string/Back"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1.00"
android:textSize="15dip" />
<Button
android:id="#+id/btnSave"
android:text="Save"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1.00"
android:textSize="15dip" />
</LinearLayout>
<!-- +++++++++++++++++++++++++++++++++++++++++++ -->
</LinearLayout>
</LinearLayout>
</ScrollView>

I can't comment, so I'll try to answer:
Did you try to set android:fillViewport="true" in your ScrollView?

1) Why would you nest a LinearLayoutinside a LinearLayout inside another LinearLayout?? I can only assume this is just an excerpt of your xml-file, otherwise this doesn't make any sense.
2) What exactly is the problem you encounter? The LinearLayout is too long so that it leaves the visible screen at the bottom?
If so, this is due to the ScrollView as the parent element. A ScrollView will fill the screen by setting android:layout_height="match_parent". A ScrollView itself gives an unbounded space of height to its children, so setting android:layout_height="match_parent" inside the child view (LinearLayout) will make it take infinite space as well. You should set it to android:layout_height="wrap_content" and see if that works out for you!

FrameLayout inside of ScrollView

I'm new to android development and I have the following problem.
I need to use FrameLayout inside of ScrollView for making it scrollable. I wrote this
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#00ff00">
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="500dp"
android:background="#ff0000">
</FrameLayout>
</ScrollView>
But this doesn't work. I tried in RelativeLayout and it worked, but I need to use for FrameLayout.
Any ideas?

android:fillViewport="true" solves this issue.
android:fillViewport, Defines whether the scrollview should stretch its content to fill the viewport.
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</FrameLayout>
</ScrollView>

I tried many variants for solving this problem, including answers here, but no one was helpful. ScrollView always wraps FrameLayout, but everything is normal with RelativeLayout, LinearLayout...
I have found one solution for this - to set minimum height of FrameLayout. You can set dynamically minimum height by setMinimumHeight() method.

To get FrameLayout inside ScrollView, do this:
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/linearLayoutHeader1"
android:layout_centerHorizontal="true" >
<LinearLayout
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<FrameLayout
android:id="#+id/FrameLayout1"
android:layout_width="match_parent"
android:layout_height="1440dp"
>
</FrameLayout>
</LinearLayout>
</ScrollView>

Your xml sample is quite good, the only thing I can see is : if the ScrollLayout parent is bigger than 500dp it won't scroll.
Indeed, the scroll is used only if the content is bigger than the scrollview.
here, you set your content height to 500dip and you scrollview to 'match_parent'
if the parent of this scrollView take the whole screen, on a 800dip height screen (for example)
=> the scroll is simply not needed.

Try setting layout_height to "wrap_content" in your FrameLayout
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ff0000">
It will scroll when the FrameLayout will be higher than the screen border. Or if you want the fixed height of scrollable area, set height to 500dp on ScrollView. It depends what you want, but don't ever set the fixed height on a ScrollView child. The ScrollView child's height should always be wrap_content.
<ScrollView
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="500dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:background="#00ff00">
<FrameLayout
android:id="#+id/frameLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ff0000">
</FrameLayout>
</ScrollView>