Develop Reference

How to set an xml image resizing to its parent's height

I am doing an application that needs to use images, but the ImageView on the HorizontalScrollView isn't resized to its parent's height. How to do? I tried all, like centerCrop, ScaleType, etc... but nothing worked
<HorizontalScrollView
android:layout_width="fill_parent"
android:orientation="horizontal"
android:layout_height="#dimen/scrollShareImgHeight">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/sharedLinearLayoutImgs"
android:orientation="horizontal">
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:scaleType="centerCrop"
android:adjustViewBounds="true"
android:src="#drawable/loremipsum"/>
</LinearLayout>
</HorizontalScrollView>

Keep Linearlayout's height as "match_parent".

Remove white space from the bottom of screen Android

How i can remove this white space at the bottom of the screen. I have also tried android:adjustviewbounds and android:scaletype. But still failed to remove the white space at the bottom of the screen. Please help me to optimize my layout so that i can remove that ugly white space from the bottom.
Here is the screenshot below of my layout screen.
Here is my XML code of the layout.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_height="wrap_content"
android:layout_width="match_parent"
tools:context="com.example.zohai.v360.Fragments.Home">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="190dp"
android:layout_marginTop="-15dp">
<ImageView
android:id="#+id/intro"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitXY"
android:adjustViewBounds="true"
android:background="#drawable/intro"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="190dp"
android:layout_marginTop="-15dp"
>
<ImageView
android:id="#+id/photog"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/photographers"
android:adjustViewBounds="true"
android:scaleType="fitXY"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="190dp"
android:layout_marginTop="-14dp">
<ImageView
android:id="#+id/model"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/model_bg"
android:adjustViewBounds="true"
android:scaleType="fitXY"
/>
</LinearLayout>
</LinearLayout>
</ScrollView>
</RelativeLayout>

In your xml code you have mentioned
android:layout_height="190dp"
Which usually does not help in android:scaletype
Please your constrain layout or linear layout with weight to distribute 3 linear layout to the screen height. Like this,
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_marginTop="-15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_marginTop="-15dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_marginTop="-15dp">
and then use android:scaletype to fit the LinearLayout
Note : Different screen size matters, I think in your case the screen height is high, which cause the layout to have blank space in bottom. In small size screen it may not be like that. Try doing above will help in all screen size

Your layout's height is set to wrap_content. The whitespace is there because you don't have enough size of the content to fill the screen completely. If you set the height to match_parent you could make the whitespace go away by setting android:background on the root view.
Otherwise you have to find out what you want there. Changing the size of the images is a bad idea because they will look stretched.
And because android is a big platform, you will see that on some devices the whitespace won't be there and on others it will be bigger. Don't set the size of the images to a fixed size.

Eliminate space in Android Layout

I am trying to make a very simple Layout like this:
An image occupying the width of the screen, and a button occupying the width of the screen coming right next to it without any space.
Here is the code I have, it is next to trivial
<?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="wrap_content"
android:orientation="vertical"
tools:context="com.andrew.question.InitialActivity">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:src="#drawable/bg" />
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:text="Hello, I am a Button" />
</LinearLayout>
The problem is, the button does not show up, it shows the image with some space
The emulator is running with screen size 1080 x 1920, and the image has size 720 x 990, if we scale that up, it should be 1080 x 1485, leaving a lot of space for the button, but the image occupied in the middle of the screen somehow that I do not understand.
This is how a screen capture on the emulator look like:
Next, I tried to swap the order of the button and the image (just for the sake of experimenting), I see something like this:
I get this:
<?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="wrap_content"
android:orientation="vertical"
tools:context="com.andrew.question.InitialActivity">
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:text="Hello, I am a Button" />
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:src="#drawable/bg" />
</LinearLayout>
Now I figured what happened, it appears that we have lot of spaces between the button and the image and therefore the button have no space. But where does those spaces come from? I wanted them to stick together.
The full source code of this experiment can be found in
https://github.com/cshung/MiscLab/tree/master/Question

The problem occurs here because the LinearLayout container has a height with wrap_content and the system extends the ImageView at its max and then display the TextView below it (thus below the screen height).
To get the right layout, you have to use layout_weight in the child views as follows:
<!-- fill the entire height -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
...>
<!-- take 90% of container -->
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.9"
... />
<!-- take 10% of container -->
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.1"
... />
</LinearLayout>
Then, in order to have "no space" for the image, you have to play with the attribute scaleType (see this example) as the following:
Either force the image to fit the widht/height:
<ImageView
...
android:scaleType="fitXY"/>
Or show the center and fill the w/h:
<ImageView
...
android:scaleType="centerCrop"/>

Your drawable/bg is being scaled to fit in id/imageView. The space you're getting is just the window's background not being covered by the image. Change ScaleType of your ImageView to FIT_XY, CENTER_CROP or other and watch a result. See: http://developer.android.com/reference/android/widget/ImageView.ScaleType.html

Your easiest option will probably be to use a RelativeLayout instead of a LinearLayout. I think this is the direction Android has been going lately. Everything seems to be RelativeLayout based. For instance, when you make a new layout in Android Studio, I believe it defaults to RelativeLayout. It used to be LinearLayout in the eclipse extension a while back.
Relative Layout
Using a relative layout instead you should have the following:
<?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="wrap_content"
tools:context="com.andrew.question.InitialActivity">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:src="#drawable/bg" />
<Button
android:id="#+id/button"
android:layout_below="#id/imageView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:padding="0dp"
android:text="Hello, I am a Button" />
</RelativeLayout >
Note that I simply changed LinearLayout to RelativeLayout, removed the setOrientation and then added the following line to your button.
android:layout_below="#id/imageView"

First of all your image is too big so it basically takes up all of the screen space in the first place and pushes the button down the viewable region.There is no need to modify the padding or margin as it is in the LinearLayout and it places all child views one after the other.
Set a desired height to the image view and also a scale type to get what you are expecting.
<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="wrap_content"
android:orientation="vertical"
tools:context="com.andrew.question.InitialActivity">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:scaleType="centerCrop"
android:layout_height="300dp"
android:src="#drawable/bg" />
<Button
android:id="#+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello, I am a Button" />
</LinearLayout>
Screen shot

ImageView adjustViewBounds not working with fitXY

I use the following code to show my button
(Because I need to add the text on the button, so I will not use the ImageButton)
<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:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="#drawable/bottom001"
android:adjustViewBounds="true"
android:scaleType="fitXY"/>
</RelativeLayout>
But the ImageView will have some empty area in the View
I think "fitXY" will fill the View, but it didn't
How can I do in this case?
Thanks for your help :)

set android:layout_width="wrap_content" And Use LinearLayout
Finally
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/test"
android:adjustViewBounds="true"
android:scaleType="fitXY"/>
For details please read android-imageview-scaletype-samples
FIT_XY
Scale the image using FILL.Stretch the picture inside the available width and height, disgarding the aspect ratio.

Scale background image in LinearLayout

I'm having the following problem;
I have a LinearLayout with in it a ScrollView, in the ScrollView is some custom view. Now I want to put an image in the background of the LinearLayout and keep the image in its original size. But when I set the background property of the LinearLayout it stretches to fit the full screen. How can I make it so that the image keeps its original size?
My xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/root"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/some_drawable">
<ScrollView
android:id="#+id/scrollview"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:fillViewport="true">
<some.custom.layout
android:id="#+id/mainLayout"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
/>
</ScrollView>
</LinearLayout>

Code example for Egor's answer:
<FrameLayout
android:id="#+id/FrameLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
>
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="#drawable/background"
/>
<LinearLayout
android:id="#+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
</LinearLayout>
</FrameLayout>

Try using FrameLayout with an ImageView and LinearLayout inside. For example, try changing the alpha of the image and move it to foreground in your FrameLayout, thus the LinearLayout stays on background. Hope this helps!

<RelativeLayout
android:id="#+id/relLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.AppCompatImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/layoutLogin"
android:layout_alignLeft="#id/layoutLogin"
android:layout_alignRight="#id/layoutLogin"
android:layout_alignTop="#+id/layoutLogin"
android:adjustViewBounds="true"
android:background="#mipmap/ic_photo_bg"
android:scaleType="fitXY" />
<LinearLayout
android:id="#+id/layoutLogin"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
</LinearLayout>
</RelativeLayout>

Alternatively to ColdForged's suggestion, you could move from LinearLayout to RelativeLayout and use ImageView to show the image instead of changing background to it. The views in RelativeLayout can interfere unlike in LinearLayout.

You might take a look at the InsetDrawable. Either that or it would likely require you to subclass your layout to draw the way you wish as the background element doesn't have the ability you need.