Develop Reference

Changing property on one element causes other elements to stop appearing

I am working the DeveloperWalkthrough example from developer.xamarin.com. Everything works after adding the imageview and the second layout with the two text widgets. When I change the orientation value of the root linear layout, the second linear layout with the two text widgets disappears from the designer
Here is the source code
<xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:src="#android:drawable/ic_menu_gallery"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/imageView1" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/linearLayout1">
<TextView
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView1" />
<TextView
android:text="Small Text"
android:textAppearance="?android:attr/textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView2" />
</LinearLayout>
</LinearLayout>
Attached are the before and after screenshots of the designer when I change the root LinearLayout orientation to horizontal

Your ImageView in the LinearLayout has a width of match_parent. This means it's going to fill out the entire screen. Your elements aren't disappearing, they're being pushed off-screen. They're siting next to the ImageView. Shorten the width and you can see them.

Fixing siblings to bottom with expandable edittext

I have a relative layout that sits at the bottom of screen
It has 3 elements horizontal
firstElement - fixed width
middleElement - width as fill_parent
last element - fixed width
MiddleElement is edit text with maxLines = 5. It starts with fixed width and then expands as typed.
With the layout below, I use center_vertical for left/right and they adjust accordingly to center.
My goal is to keep left/right elements to bottom while the edit text expands. I could not make it work,
Below is just one example of layout I tried. I have tried align_parentBottom, layout_gravity=bottom, gravity=bottom.
I could not make it work.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/bottomComponent"
android:background="#color/red"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="50dp">
<LinearLayout
android:background="#color/green_theme"
android:id="#+id/firstElement"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:gravity="center"
android:clickable="true"
android:layout_width="50dp"
android:layout_height="50dp">
<LinearLayout
android:gravity="center"
android:orientation="vertical"
android:layout_gravity="center"
android:layout_width="20dp"
android:layout_height="20dp">
<ImageView
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:scaleType="fitCenter"
android:src="#drawable/firstImage" />
</LinearLayout>
</LinearLayout>
<EditText
android:id="#+id/middleElement"
android:layout_centerVertical="true"
android:layout_marginTop="7.5dp"
android:layout_marginBottom="7.5dp"
android:maxLines="5"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:minHeight="35dp"
android:layout_toLeftOf="#+id/lastElement"
android:layout_toRightOf="#+id/firstElement"
android:paddingLeft="6dp"
android:paddingRight="0dp"/>
<Button
android:id="#+id/lastElement"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_width="65dp"
android:layout_height="50dp"
android:textColor="#color/title_gray"
android:background="#color/green_theme"
android:textSize="18dp"
android:textAllCaps="false"
android:text="#string/lastElement" />
</RelativeLayout>

Ok this post solved my issue Android LinearLayout fill-the-middle
What I did not know that for linearlayout layout_weight=1 will work as fill_parent in relative layout

split linearlayout width between wrap_content and the rest

I have a LinearLayout, horizontal, and with variable width (width is set to fill parent) containing two textboxs A and B.
I need :
textbox B (the black one) takes as much width as it needs (wrap_content ?)
textbox A takes what's left.
Pictures to illustrate :

Try the following code:
<?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="horizontal" >
<TextView
android:id="#+id/textView1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1.35"
android:text="TextView" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="asd" />
</LinearLayout>

use relativelayout instead.like this:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<!-- black box -->
<TextView
android:id="#+id/txt1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"/>
<!-- white box -->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toLeftOf="#+id/txt1"
android:singleLine="true"
android:layout_alignParentTop="true"/>
</RelativeLayout>
NOTE: i see in some device,because of language direction or device setting, linearlayout change children position. for example black text box come to left and white text box goes to right,but if use relativlayout it never happen.

Android: Align Parent Bottom + Bottom margin

I've used a relative layout and I want to set the button at bottom of the screen, However this puts it all the down to the bottom and I would like to have some margin so it there's some space between the end of the screen/view and the button. However whatever I do the button margin just doesn't do anything on 2.1+ for some reason. The relative layout contains a background so I cant but the margin on that.
Anyone know a fix for this?
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="0dp"
android:background="#drawable/background" >
<Button
android:id="#+id/confirm_mobile_button_next"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="false"
android:layout_centerHorizontal="false"
android:layout_centerInParent="false"
android:layout_margin="15dp"
android:background="#drawable/button_shape_selector"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:text="#string/confirm_mobile_no_continue"
android:textColor="#color/white"
android:textStyle="bold" />
</RelativeLayout>

You can simply add a padding to the RelativeLayout instead of a margin to the Button, e.g. android:paddingBottom="15dp".
In general I'm always testing my layout in the Exclipse preview using API Level 8 setting. This gives quite accurate results for most devices, including ICS and JB.

The other thing you can do is put a View that's aligned to the bottom of the RelativeLayout, and set its height to the bottom margin you would want to use (or simply specify a value for layout_marginBottom) like so:
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/some_image"
android:adjustViewBounds="true"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Some Overlay"
android:padding="3dip"
android:gravity="center_vertical|center_horizontal"
android:layout_above="#+id/empty_view"
android:layout_marginBottom="35dip"
/>
<View
android:id = "#+id/empty_view"
android:layout_height = "30dip"
android:layout_width = "match_parent"
android:visibility="invisible"
android:layout_alignParentBottom="true"
/>
</RelativeLayout>
This example fills the RelativeLayout with the ImageView, and positions a TextView over the ImageView.

Yu can use translateY attribute
translateY="-16dp"
Final code
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="0dp"
android:background="#drawable/background">
<Button
android:id="#+id/confirm_mobile_button_next"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="false"
android:layout_centerHorizontal="false"
android:layout_centerInParent="false"
android:layout_margin="15dp"
android:background="#drawable/button_shape_selector"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:text="#string/confirm_mobile_no_continue"
android:textColor="#color/white"
android:textStyle="bold"
android:translateY="-16dp" />
</RelativeLayout>

only working solution suggested by #franny zhao is below.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<FrameLayout
android:id="#+id/fl_layout"
android:layout_alignParentBottom="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tv_layout"
android:text="hello world"
android:layout_marginBottom="50dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</FrameLayout>
</RelativeLayout>
If you add padding to the bottom aligned view as suggested by others, the view background will also extend. If you have colored background then the view will look like it is glued to the bottom. Padding and margin are entirely different, padding is part of view, but margin leaves space between views.

I think the best way is to set android:layout_alignParentBottom in XML
then in java code behind:
Button confirm_mobile_button_next = (Button)findViewById(R.id.confirm_mobile_button_next)
and
confirm_mobile_button_next.setTransitionY(-THE_VALUE) or setTransitionX(-THE_VALUE)

I think the best way is to set:
<...
android:layout_alignParentBottom="true" />
then in java code behind:
Button confirm_mobile_button_next = (Button)findViewById(R.id.confirm_mobile_button_next)
confirm_mobile_button_next.setTransitionY(-THE_VALUE) or setTransitionX(-THE_VALUE)

You can use a ViewGroup(for example, FrameLayout or LinearLayout) to wrap the view. Set alignParentBottom in the outside ViewGroup, then marginBottom can work in the inside View.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<FrameLayout
android:id="#+id/fl_layout"
android:layout_alignParentBottom="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tv_layout"
android:text="hello world"
android:layout_marginBottom="50dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</FrameLayout>
</RelativeLayout>

Since I stumbled upon this issue, and saw no answers fit to my situation I started thinking for half a second and resolved it by setting a negative margin on the view inside the RelativeLayout sample:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_marginTop="-8dp"
android:layout_marginStart="-8dp">
</RelativeLayout>
This should prove useful to some people.

Well this is 2022, but if you still are not using ConstraintLayout for some reason, like the one legacy project code I am fixing, use this property for a Bottom margin type visual.
android:translationY="-8dp"
and your code should look like this (in my case this a FAB in Relative Layout)
<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
android:id="#+id/cart_check_out_btn"
style="#style/FABThemeDark"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginHorizontal="16dp"
android:layout_marginVertical="16dp"
android:text="#string/cart_check_out_btn"
android:textAllCaps="false"
android:translationY="-8dp" />
And it will work like this

Try in this way :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="17dp"
android:text="Button" />

Here is another alternative. If you want to set the child's margin instead of parent's padding, you should set the value of android:layout_marginTop to double of the desired margin and then set the android:layout_centerVertical to true. Top margin is given double the desired value to compensate the bottom margin. That way you will have an equal top and bottom margin around the child view.
<Button
android:id="#+id/confirm_mobile_button_next"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="false"
android:layout_centerVertical="true"
android:layout_centerInParent="false"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="30dp"
android:background="#drawable/button_shape_selector"
android:paddingLeft="10dip"
android:paddingRight="10dip"
android:text="#string/confirm_mobile_no_continue"
android:textColor="#color/white"
android:textStyle="bold" />
It will give you the same result.

Difficulty with ScrollView and LinearLayout

I'm trying to make an Android layout: 3 components inside a vertical LinearLayout. The center component is a ScrollView that contains a TextView. When the TextView contains a significant amount of text (more than can fit on the screen), the ScrollView grows all the way to the bottom of the screen, shows scrollbars, and pushes the last component, a LinearLayout with a Button inside, off the screen.
If the text inside the TextView inside the ScrollView is short enough, the button at the bottom of the screen is positioned perfectly.
The layout I'm trying to achieve is:
The XML for the layout I've written is:
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip"
android:text="Title />
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="web"
android:textColor="#FFFFFF"
android:background="#444444"
android:padding="10dip" />
</ScrollView>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<LinearLayout
android:orientation="horizontal"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<Button android:id="#+id/login_button"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_weight="1"
android:text="#string/next_button"/>
</LinearLayout>
</LinearLayout>

The scrollview is the second view object and is set to wrap_content, which is more than the screen.
I recommend a RelativeLayout. Top textview first with android:alignParentTop="true", the bottom LinearLayout next with android:alignParentBottom="true" and the scrollview listed last in the xml with the value android:alignBelow="#id/whatYouCallTheHeader.
This will align the bottom bar at the bottom of the screen, and the header at the top, no matter the size. Then the scrollview will have its own place, after the header and footer have been placed.

you should go for relativeLayout rather than LinearLayout. And you can use some properties like alignBelow and all.

Try adding a layout weight into the ScrollView ie.
<ScrollView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
This worked for me in a situation almost identical to the one you're presenting but left me wondering why, because it is counter-intuitive that increasing the layout weight of a control from 0 (the default if you don't specify a layout_weight) to 1 should make a control which is already using too much space smaller.
I suspect the reason it works is that by not specifying a layout_weight you actually allow the layout to ignore the size of the scroll view relative to other controls and conversely if do specify one you give it permission to shrink it in proportion to the weights you assign.

![Fixed Header-Footer and scrollable Body layout ][1]
This is what you are looking for . Most of the app in android had this type of layout ,
a fixed header and footer and a scrollable body . The xml for this layout is
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:background="#5599DD"
android:layout_height="fill_parent">
<!-- Header goes here -->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip"
android:textSize="20sp"
android:layout_gravity="center"
android:text="Title" />
<!-- Body goes here -->
<ScrollView
android:layout_weight="1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:autoLink="web"
android:text="#string/lorem_ipsum"
android:textColor="#FFFFFF"
android:padding="10dip" />
</ScrollView>
<!-- footer goes here -->
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="#+id/login_button"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="bottom"
android:layout_alignParentRight="true"
android:text="Button"/>
</RelativeLayout>
</LinearLayout>
</LinearLayout>