Develop Reference

How to resize an ImageView within a given Layout in Android?

I have a problem to make a proper layout for a special case. I experimented on that already for a while both in the designer and in code, but I couldn't find a solution, that's why I need your help.
I have to create a layout which should have a structure like pictured in the images below. It is mainly a combination of several linearLayouts. The problem I have is, that the picture can only be added within the code, because this layout is a detail view that displays information about items from a list.
On the top is the layout without an image place holder (no loaded picture - indicated in black), here the width of "linearLayout_BigLeft" is given by the width of the two buttons and the textView (which all have content) in the "linearLayout_BelowImage".
In the middle you see the layout after the picture has been loaded (image indictated in orange) in code. Depending on the aspect ratio of the android device the black colored gaps differ. I can't get the image to resize to the whole available height and adjusting its width accordingly. The "linearLayout_BelowImage" adjusts itself to the image size (the textView in it is getting wider).
On the bottom is the layout which shows the ideal state. The image always should use the whole available space in height and resize accordingly in width. The "linearLayout_BelowImage" adjusts itself to the image size (the textView in it is getting wider).
Question:
How can I get a layout (after the image is loaded in code) that looks like the bottom picture? The image, after loaded in code, has to resize itself, so it uses the whole available height and resizes its width accordingly. The "relativeLayout_Top" and the "linearLayout_BelowImage" have both fixed heights. The "scrollView_BigRight" adjusts itself based on the space that the "imageView_OrangeImage" doesn't need for itself.
I can deal with solutions that adjust the layout in code, after the image has been added, or solutions that makes the layout.xml itself flexilbe enough to deal with this situation.
Any help is highly appreciated. If you need any more information please let me know.
Below is the main content of my layout.xml, that is needed for this problem.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#color/white">
<RelativeLayout
android:id="#+id/relativeLayout_Top"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#color/blue" >
</RelativeLayout>
<LinearLayout
android:id="#+id/linearLayout_Big"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#color/transparent" >
<LinearLayout
android:id="#+id/LinearLayout_BigLeft"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#color/transparent" >
<ImageView
android:id="#+id/imageView_OrangeImage"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#color/black" />
<LinearLayout
android:id="#+id/linearLayout_BelowImage"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#color/blue_white_blue" >
<Button
android:id="#+id/btn1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#color/blue" />
<TextView
android:id="#+id/textView_BelowImageMiddle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#color/white" />
<Button
android:id="#+id/btn2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#color/blue" />
</LinearLayout>
</LinearLayout>
<ScrollView
android:id="#+id/scrollView_BigRight"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="#color/grey" >
</ScrollView>
</LinearLayout>
</LinearLayout>

android:adjustViewBounds="true"
This one’s a manual fix for “optimized” code in scaleType="fitCenter". Basically when Android adds an image resource to the ImageView it tends to get the width & height from the resource instead of the layout. This can cause layouts to reposition around the full size of the image instead of the actual viewable size.
AdjustViewBounds forces Android to resize the ImageView to match the resized image prior to laying everything else out. There are times where this calculation won’t work, such as when the ImageView is set to layout_width="0dip". If it’s not working, wrap the ImageView in a RelativeLayout or FrameLayout which handles the 0dip flexible size instead
get it from this site
OR
Mode android:scaleType="centerCrop" uniformly stretches the image to fill the entire container and trims unnecessary.
You can change the way it default scales images using the android:scaleType parameter. By the way, the easiest way to discover how this works would simply have been to experiment a bit yourself!
get it here

Why do I get white space on top and on the bottom of my ImageView in my RelativeLayout?

I am using a relativelayout to overlay to images. On all screen sizes so far that I have tested (from 2.7 to 10.1 inch) I always get white space on top of my image. In my IDE I always see that my relativelayout is causing the extra space on top and on the bottom of my image.
Why is that? I have set all height attributes to wrap_content and even added the adjustViewBounds attribute.
Note: You should know that my image is a lot bigger in size, meaning that there will be some sort of scaling.
Thanks for your tips!
Here is the code:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:orientation="vertical"
android:focusable="true"
android:focusableInTouchMode="true">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="#string/bgf"
android:textColor="#000000"
android:textSize="25sp" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:paddingRight="5dp"
android:paddingLeft="5dp"
android:paddingBottom="5dp"
android:layout_gravity="center_horizontal"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:src="#drawable/cde"
android:contentDescription="#string/cde" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:layout_gravity="center_horizontal"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:src="#drawable/fgh"
android:contentDescription="#string/abc" />
</RelativeLayout>
</LinearLayout>
</ScrollView>

I had the exact problem. After struggling for quite some time, I solved it by following this
and add the following to my program
android:adjustViewBounds="true"
It works perfectly

This is occuring as the image is scaled down to fit the area available without losing the image's aspect ratio. You are getting white space because the image first occupied the available width and according to the aspect ratio of the original image the height of the was brought down.
To get a clearer understanding, I suggest you to do the following :
Set the background color of the relative layout to some color
Now you can understand the space between the imageView and the relativelayout.
Once you have checked that on your device, Do the following change and try again
Set the attribute scaleType = "fitXY" in your imageView.
This will make the image to scale and occupy the complete area available to the imageView. (The aspect ratio of the original image will be lost in this case). Now you will come to know the amount of area the imageView occupied.
I suppose once you do this you can conclude that :
In the first run if you had set the background of relativeLayout as black, it won't be visible since the imageView occupies the entire area without leaving any gap.
In the second run the image will cover the entire height and width, although the aspect ratio was lost. Hence this ascertains that imageView does cover the width and height and no space is left, its the image's aspect ratio ie the problem
In case you arrive at a different result altogether please do inform, we can work it out
EDIT :
Please do remove the paddings you have given for imageView too

Drawable: making it fit the screen, and scrollable

I have a drawable which i want to display. I want it to fit the screen horizontally, and to be scrollable vertically (when its height is bigger than the screen), while keeping it scaled.
I'm putting the drawable into a ImageView. The drawable is changeable (pictures of different heights and widths). I could scale every drawable to fit to the width of the screen, but when I do the drawable's higher than the screen will get cut of at the top, and i get a black bar at the bottom of my ScrollView.
I've tried every combination of ScrollView and ImageView I could think of, but the Image is either stretched or part of it falls out. Any help is much appreciated!
My current code:
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center" >
<ImageView
android:id="#+id/iv1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="center" />
</ScrollView>

<ImageView
android:id="#+id/iv1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerInside"
android:adjustViewBounds="true"
/>
But I am not sure this is able to make image bigger than parent height. If this don't help I try to find in my archive working solution.

Image stretching

API 7 (2.1)
I'm implementing high resolution images for the drawable-hdpi folder of my app.
Along the bottom of my screen I have a LinearLayout with a fill_parent width. Inside, I have 3 LinearLayouts with a weight of 1. Inside these, I have an ImageView. In effect, I have 3 equally sized spaces for 3 images.
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/image1"
/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:padding="0dip">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/image2"
/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/image3"
/>
</LinearLayout>
</LinearLayout>
When the phone is in landscape mode, everything looks fine.
When the phone is in portrait mode, the images are scaled down because their widths are too wide for their 1/3rd space on the screen. The images still look fine.
Here's my problem:
My images scale fine, but it appears the LinearLayouts wrapping each image do not scale their height.
In landscape mode, the top and bottom of the LinearLayouts wrapping the images share an edge. Meaning, the top of the ImageView is aligned with the top of the LinearLayout wrapping it, and the bottom of the ImageView is aligned with the bottom of the LinearLayout wrapping it. In other words, the height of the LinearLayout == the height of the ImageView.
In portrait mode, the top and bottom of the LinearLayouts wrapping the images have a bunch of space between them and the top and bottom of the images, almost like there is padding. In other words, the height of the LinearLayout > the height of the ImageView. This is not desirable.
Any ideas?
It's almost like it's sizing the LinearLayout and ImageView, then squishing the ImageView to fit, and then not resizing the LinearLayout...

You can try to design separate layouts for both orientations. In your project's res folder make a subfolder named layout-land. There copy or create a new layout with the same name. In this way you would have a complete control over the layout in any orientation.
Since you are using android:layout_weight="1" shouldn't linearLayouts equaly split the space hence an extra space would appear?
EDIT:
It seems that it is ImageView that expands its height when LinerLayout has weight set. Add this line to each of your ImageViews:
android:adjustViewBounds="true"

I know that this isn't answering the question you asked, but it seems like it would be better to avoid multiple problems by changing the orientation of your linear layout to vertical when the device orientation changes. I believe you can do that with an OrientationEventListener.

I suppose that its better to have another layout designed for the portrait mode.
Do not use the same layout for both portrait and landscape modes. It would be better to have different layouts for portrait and landscape modes so that the control of the design will be in our hands.

Need help with an ImageView always displaying incorrectly

My ImageView for some odd reason is always displaying a picture in the middle, left of my screen despite the xml code insisting it to be in the center.
I force portrait orientation in my app and here is my xml code for my layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:gravity="center">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/image_view"
android:layout_weight="1.0"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/message"
android:gravity="center_horizontal"
android:padding="10dip"/>
<Button
android:layout_gravity="center_horizontal"
android:layout_width="fill_parent"
android:textStyle="bold" android:id="#+id/action_button" android:selectAllOnFocus="false" android:layout_height="100dip" android:text="Click here to preform actions"/>
</LinearLayout>
So, the page should display as Picture in the middle, extending the width of the screen, the text below that and the button below that. But for some reason, the picture is displayed as a small, box thumbnail in the middle left of the screen - any ideas on a workaround?

Assuming you want your picture centered inside a top box here, you don't want android:gravity="center", you actually just want android:scaleType set on the ImageView itself. "center" is the right value if you don't want scaling; centerInside is probably appropriate if you do (in which case you'll need to define some sort of dimensions or weight on your ImageView). For more on scaleType values, see the documentation.
You also don't want the image height set to fill_parent, or it will do that (which means no text below it, since the image fills the entire parent LinearLayout leaving no room for text). You probably want the ImageView's height set to wrap_content or some fixed height (e.g. 100dip).