android relative layout contains image view layout - android

I have a image view inside of a relative view, as per code below
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/maintenance_banner"
android:layout_alignParentTop="false"
android:layout_margin="0dp"
android:padding="0dp"/>
</RelativeLayout>
what i don't understand is the gaps at the top & bottom, as I have set both height to wrap_content, the gaps shouldn't be part of the content, only the imageview it self isn't it? Or does it means the gaps are part of the image view it self? but i set the padding to 0. also, for some reason I can get ride of them by setting scale type.

The image probably has another aspect ratio then your imageView.
Try to set the android:scaleType to centerCrop or whatever else does work for you.
The default scale type is: FIT_CENTER and FIT_XY for buttons.
Hope this helps
EDIT: Sorry I haven't seen the wrap content.
From the screenshot it looks like you have other views below, are you including this layout file into another one?
Cheers

Related

Android, XML: Show only portion of image in layout container without altering aspect ratio

I want to set a background to any layout.
Usually, I would go on about this like here:
<LinearLayout
android:orientation="vertical"
android:background="##drawale/somedrawable"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="100dp"/>
But this will always make the background fit the LinearLayout. But what if the layout was smaller in height than the image I set as background? I do NOT want to destroy the image's aspect ratio but just center the image inside the layout and have the height overlap so that it isn't visible anymore.
To clarify:
Left is what happens currently, but right is how I want to to be. Since the layout container is smaller than the imageview or background image is, it is supposed to stay centered but only show what fits without altering the aspect ratio.
Use an ImageView inside the linear layout with width and height match_parent and set the scaleType="centerCrop"
<ImageView
android:src="#drawable/somedrawable"
android:scaleType="centerCrop"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
you cannot apply the scaletype property in linearlayout its better to use imageview to achieve this following is the link how to use scaleType attribue, to avoid the stratching behaviour use the 9 patch image, follwoing is the link to convert your image into 9patch

Adjust ImageView width according to height

I am trying to make a simple LinearLayout composed of an ImageView and TextView.
The ImageView should scale to match the LinearLayout height and not lose proportions while doing so.
This is the xml I currently have.
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView
android:id="#+id/logo"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:background="#CCCCCC"
android:scaleType="fitCenter"
android:src="#drawable/strip" />
<TextView
android:id="#+id/logoText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:singleLine="true"
android:text="what an awesome text"
android:textSize="18sp" />
</LinearLayout>
Using the above xml, the result is that the ImageView height will indeed match the LinearLayout height and it's width will be the same as the src image but the rendered image will scale properly and center, but this leaves the ImageView itself filling about 90% of the Layout's width as it's the src image width, leaving no space for the TextView.
I just would like to scale the ImageView to match the parent's height and it's width should be just as much needed to scale it proportionately.
Add a linear layout on the image view. Just the image view and nothing else. :) hope it helps
EDIT 1: As many of the other answers mentioned Using the layout_weight property will also help resolve this issue.
add weight 1 on imageview so there will be space for the textview
As I mentioned in the comment under your answer post where you cite KISHORE_ZE, it seems to be helpful only with an image of particular size, and on a particular screen density and resolution. So while it looks acceptable on your current device, it might be a mess on a different one. I suggest that you figure out what part of the layout you want to use for the image and use android:weight attributes for your ImageView and TextView to achieve wanted result.
As #KISHORE_ZE said, this solves the problem.
"Put the image view in a linear layout. Just the image view. Nothing else. "
this visual guide is a lot helpful.
link
in your image view add:
android:scaleType="fitCenter"
or
android:scaleType="fitXY"
whichever suites you.

Android: tag rotation in imageview cutting image inside listview

i'm new in android development and i'm trying rotating an image view inside a listview. I have the follow xml for the custom cell:
<RelativeLayout
android:id="#+id/content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true">
<ImageView
android:id="#+id/borderImageView"
android:layout_width="#dimen/photoReceiverWidth"
android:layout_height="#dimen/photoReceiverHeight"
android:scaleType="fitXY"
android:rotation="-10"/>
</RelativeLayout>
When it display, it cut a peace of the image. The view is not calculating the size for the rotation.
I don't want to create a new bitmap because the cost is too high.
android:adjustViewBounds="true"
This is an image view property, so place it within the image view rather than the relative layout. I am not sure if adjustViewBounds works on a fixed size ImageView.
You could change the width and height to wrap_content and use a maxHeight or minHeight property to define some additional bounding rules.
The scale type should also probably be centerInside, but play with these to see what suits.

align view to a scaled ImageView

i have this problem frequently, and I refuse to believe that it can't be solved without creating a custom layout:
How do you align a view with an ImageView that get scaled to match it's parent bounds but keeps the aspect ratio ( scale type is anything but fitXY ). I was under the assumption that f you set adjustViewBounds to true, the view bounds get adjusted to match the actual size of the image ("Set this to true if you want the ImageView to adjust its bounds to preserve the aspect ratio of its drawable."). But that is not the case. And it doesn't make and difference if the image has to get scaled up or down to fit its bounds.
Take a look at this layout:
<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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
>
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:src="#drawable/square" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/imageView1"
android:layout_alignTop="#+id/imageView1"
android:text="#string/hello_world" />
</RelativeLayout>
This layout looks like this:
As you can see the bounds do not get adjusted and the TextView is aligned to the incorrect bounds. I created a custom Layout to creates the proper bounds, but maybe I'm missing something and it should be possible using the standard layout features...
EDIT: to clarify: i'm looking for a way to align the TextView with the actual image. that is with the red square in the given example.
Ok, so it's been three years and you probably figured this out long ago. But you were halfway there when you specified adjustviewBounds=true. You just needed to change the ImageView layout width and height to wrap_content at the same time.
Your TextView IS aligning to your ImageView just as you requested. If you were to give your ImageView a background color you would see that it occupies the same area as your TextView. It's just that the actual image is centered within the view as you requested.
And you can continue to use scaleType=fitCenter or centerInside depending upon what you want. Neither will crop or stretch the image and your TextView will remain aligned.
What if you use - android:scaleType="centerCrop" on the ImageView?
The image will be cropped to cover the entire layout, but the aspect ratio will be maintained.

Android: How do I align textview on a image background that dos not strech in xml

Ok here is the problem...
I have a image background that need some text and additional graphics on it. The background image needs to be in the center of the screen and may not stretch. Here is what i need to do:
The problem is that i need to align the text to the background image.
I've tried to wrap it all into a relative layout - something like this:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/bg_image"
android:layout_centerInParent="true"
android:src="#drawable/member_card"/>
<TextView
android:layout_height="wrap_content"
android:layout_alignLeft="#id/bg_image"
android:text="#string/membercard_info"
android:layout_marginTop="40dp"
/>
<TextView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_alignLeft="#id/bg_image"
android:layout_marginTop="200dp"
/>
</RelativeLayout>
This will not work since android adds additional padding to the image to avoid it from stretching.
Here is what happens in two different cases:
So how do I align the text to the background image?
I've solved this problem in the past in code by baking it all into one image,- but would like to do this in xml.
If you want to remove padding, you can use manually set it. However, if you want overlapping elements, you generally want to use FrameLayout. Look here: http://mobile.tutsplus.com/tutorials/android/android-sdk_frame-layout/
Set a gravity inside the frame layout to align it.
if you want an ImageView with additional layers drawn on top of that, see this thread: How to maintain multi layers of ImageViews and keep their aspect ratio based on the largest one?
There a padding around the image because you set the imageView size to fill its parent ( using match_parent )
You should try to set it to wrap its content :
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
.../>
EDIT : If your picture is bigger that the screen size, you need to have it scaled keeping the aspect ratio.
To do this, use match_parent in vertical with a scaleType to FIT_CENTER
and keep the wrap_content setting for the width ( since we want the image view left/right bounds stuck to the image content )
<ImageView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:scaleType="fitCenter"
.../>
Is this better ?

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