Develop Reference

Resize image based on text height

I need to display an image and text on a single row. The image should resize based on the text height. I know that it's possible programmatically but is it possible to do this also only in XML ?
<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">
<ImageView android:id="#+id/Image" ... />
<TextView
android:id="#+id/Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/Image"
tools:layout_editor_absoluteX="47dp"
tools:layout_editor_absoluteY="37dp" />
</RelativeLayout>

Just wrap the views inside a parent view that adjust to the textview and make the imageview resize according to the parent.
<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">
<!-- LOOK HERE-->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#id/Image"
tools:layout_editor_absoluteX="47dp"
tools:layout_editor_absoluteY="37dp" />
<ImageView android:id="#+id/Image"
android:layout_heigth="match_parent"
android:layout_width="wrap_content" />
</LinearLayout>
</RelativeLayout>
I haven't test it, but it should be something really close to this.
EDIT: Using an horizontal LinearLayout should give you a quick view of how is working and the in the linear layout you arrange with the toRightOf, toLeftOf, etc.

First view in RelativeLayout expand to fill remaining space

I am working on a layout with a cardview, a checkbox and a button with the initial structure as shown in the first image:
In this case the listview is not shown until the user clicks an image inside the cardview, so when this happens the dessired structure is like
the second image
However as the listview is actually inside a fragment I can't achieve the dessired layout because wrap_content and match_parent for the cardview gives me the next result
And as you can see the cardview overlaps the button and the checkbox goes beyond the screen
Right now this is my layout:
<?xml version="1.0" encoding="utf-8"?>
<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"
android:background="#android:color/white">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/card"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_alignParentTop="true"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
>
<ImageButton
android:layout_width="#dimen/event_invitation_expand_icon"
android:layout_height="#dimen/event_invitation_expand_icon"
android:id="#+id/shrink"
android:src="#drawable/ic_shrink"
android:background="#android:color/transparent"
android:scaleType="fitCenter"
android:layout_gravity="center_vertical"
android:layout_marginRight="5dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/shrink"
android:layout_marginTop="5dp"
android:id="#+id/list">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:name="ListFragment"
tools:layout="#layout/fragment_list"/>
</RelativeLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/checkBox"
android:layout_marginTop="20dp"
android:layout_below="#+id/card"/>
<Space
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#+id/button"
android:layout_below="#+id/checkBox"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:layout_alignParentBottom="true"
style="#android:style/Widget.DeviceDefault.Button.Borderless"
/>
I hope you can help me to set the max height of the card view to stop growing when the space is filled.
I have also tried to set the checkbox always at top of the bottom and the cardview to fill the remaining space and although it gives me the correct structure when the listview is expanded, it doesn't work for the list hidden since the cardview fills the space with nothing.
Update
As suggested I have tried changing the root layout to LinearLayout using weight, however, I got the same result as before and if I change the weight of the cardview to 1 and the checkbox to 0 I am able to get the desired layout for the expanded list but not for the hidden case.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:background="#android:color/white"
android:orientation="vertical">
<android.support.v7.widget.CardView
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/card"
android:layout_marginTop="5dp"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_weight="0">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp"
>
<ImageButton
android:layout_width="#dimen/event_invitation_expand_icon"
android:layout_height="#dimen/event_invitation_expand_icon"
android:id="#+id/shrink"
android:src="#drawable/ic_shrink"
android:background="#android:color/transparent"
android:scaleType="fitCenter"
android:layout_gravity="center_vertical"
android:layout_marginRight="5dp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/shrink"
android:layout_marginTop="5dp"
android:id="#+id/list">
<fragment
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:name="ListFragment"
tools:layout="#layout/fragment_list"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/check"
android:id="#+id/check"
android:layout_marginTop="20dp"
android:layout_below="#+id/card"
/>
</LinearLayout>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/button"
android:textStyle="bold"
android:textColor="#android:color/white"
/>

You'll need to use a LinearLayout and use Weight for the childs.
You can change all views weight on click.
But I think you'll need to put your CheckBox inside a layout and set this layout weight. Otherwise you'll mess with the height.
Didn't look to close to your layout, but you may need to do that for CardView too.
Just keep that in mind.
Hope this helps

To do what you are trying to do, you would have better luck using a LinearLayout with vertical orientation as your root element. Doing this, you could set the CardView to have a weight of 1 (and a 'height' of 0dp, because of how weight works) without giving a weight to the other elements, causing it to fill all available space not taken by the other two elements. The method for doing this can be found here:
http://developer.android.com/guide/topics/ui/layout/linear.html#Weight

Android XML Layout - ImageView taking all space

This is my first post on Stackoverflow.
My question is related to ImageViews : I have a simple XML layout file composed of two LinearLayouts included in a general LinearLayout.
The first LinearLayout contains a simple ImageView, and the second one contains three buttons.
My problem is that the ImageView takes all the space on the screen and therefore the three buttons aren't displayed.
I've done quite a lot of research, I've tried to change everything I could to make it work and the only thing that did the trick was to turn the ImageView layout_width attribute into a dp value.
Why do I have to do that? Is it somehow related to the dimension of the original picture (1280 x 800)?
The XML file is :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/linearMainCreateTape"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="horizontal"
tools:context="com.example.anthony.walkmanfreeversion.CreateTapeActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imageView"
android:src="#drawable/highresoltape1"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Button1"/>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Button2"/>
<Button
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Button3"/>
</LinearLayout>
</LinearLayout>

For anyone having this issue, there is a quick solution for that.
In your imageView XML add the following property:
android:adjustViewBounds="true"
for. eg
<ImageView
android:adjustViewBounds="true"
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="#mipmap/ic_launcher"/>
If you are using a Constraint Layout, don't forget to add the constraints.

You could use android:layout_weight in order to define how much space should be taken by the layouts:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/linearMainCreateTape"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="horizontal"
tools:context="com.example.anthony.walkmanfreeversion.CreateTapeActivity" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/imageView"
android:src="#drawable/highresoltape1"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button1"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button2"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Button3"/>
</LinearLayout>
</LinearLayout>
In the example above both inner layouts have the same weight, so they bot fill 50% of the height.
If all views reserve the entire available height (match_parent) then the first one wins. So in your case the top level layout (linearMainCreateTape) fills the whole height and the layout which contains the ImageView does the same. So there's nothing left for the three buttons below it.

Defining a specific xml layout with a nested layout

I am in the process of designing my first Android application and I am trying to get the hang of creating an XML layout. (I have a great deal of experience with Java)
Essentially what I wanna do:
Where the outlines describes:
Blue: A basic View (where i can set a text)
Red: A ButtonView (Used so the user can synchronize data)
Green: A nested RelativeLayout (Where i am going to add a lot of other stuff)
More specifically what i wanna do:
So my question is this: How can i set up the different layouts? I am having the must trouble with setting up the blue and red views because i want the red view to fill up around 25% of the screen width(and the blue to fill up the last 75%).
Thank you in advance.

Use layout_weight property to specify the percentage of screen space a view takes.
Like here, for e.g:
<LinearLayout android:layout_height="match_parent" android:layout_width="match_parent"
android:orientation="vertical" .........>
<LinearLayout android:layout_height="wrap_content" android:layout_width="match_parent"
android:orientation="horizontal">
<EditText android:layout_height="wrap_content" android:layout_width="0dip"
android:layout_weight="3"/>
<Button android:layout_height="wrap_content" android:layout_width="0dip"
android:layout_weight="1"/>
</LinearLayout>
//Other view
</LinearLayout>

Use following xml, this is specially designed for you.
<?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" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_weight="0.75">
<TextView
android:id="#+id/headingTextView"
style="#android:style/TextAppearance.WindowTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Cafe Vigeos"
android:textColor="#android:color/white"
android:textSize="30sp" />
</RelativeLayout>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_weight="0.25">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</RelativeLayout>
<RelativeLayout
android:id="#+id/nested_relative_layout"
android:layout_width="match_parent"
android:layout_height="fill_parent" >
</RelativeLayout>
</LinearLayout>

Android ScrollView and buttons at bottom of the screen

I want to implement this: A ScrollView that contains many elements (ImageViews, TextViews, EditTexts etc) and then after the ScrollView some buttons (which are custom ImageViews) that appear always exactly at the bottom of the screen.
If I use the android:fillViewport="true" attribute, then if the elements of the ScrollView are too big to fit in the screen size the buttons get invisible . If I use the android:Weight=1 attribute then the ScrollView gets only 50% of the Screen when the screen is big and it can fit (I want the buttons to take a small percentage, about 10%). If I set the android:Weight to bigger values then the buttons appear very small.
Please help! Maybe it is something simple that I overlooked but I’ve been banging my head for hours!

Just created and tested it. Looks like you want.
<?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">
<LinearLayout
android:id="#+id/buttons"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
android:layout_alignParentBottom="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Custom Button1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Custom Button2"/>
</LinearLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="#id/buttons">
<!--Scrollable content here-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="test text"
android:textSize="40dp"/>
</LinearLayout>
</ScrollView>
</RelativeLayout>

<?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">
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hallo Welt"
/>
</LinearLayout>
</ScrollView>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Go next page"
android:layout_alignParentRight="true" />
</RelativeLayout>
</LinearLayout>

This worked for me. Give the scroll view a weight of 1. Put all the other widgets following the scroll view in a layout. The scroll view will grow enough to not block the rest.
Widgets in scroll view and rest at bottom

scrollview cannot fit the screen because you put it on a linear layout, so linear layout fit in the screen,
just try to make scrollview as root elemen on xml layout
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<!-- Here you can put some XML stuff and BOOM! your screen fit to scrollview -->
</LinearLayout>
</ScrollView>

If you do not want to use RelativeLayout, it is better to use LinearLayout. This method is better in my opinion.
Just set the layout_weight to one