Develop Reference

How to create a layout with rounded corners on only the top or bottom half?

I'm trying to add row items into a RecyclerView that looks like this:
The view layout has 2 versions; one with an image on the top half and one that only contains text. A few things make this a tricky layout to create;
The image is only rounded on the top
The textview bottom half is only rounded on the bottom
If the ImageView is gone, then the textview DOES have rounded top corners.
I'd prefer to have only one row layout and designed in XML. Is that possible, or do I need to create this layout in code?

You can achieve this using material cardview. Here's the xml code of the full layout file:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.card.MaterialCardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_margin="10dp"
app:cardCornerRadius="30dp"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="#+id/image"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#406cca"
android:visibility="visible" />
<TextView
android:id="#+id/text"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#fb7500" />
</LinearLayout>
</com.google.android.material.card.MaterialCardView>
</androidx.constraintlayout.widget.ConstraintLayout>
Remember, if the image is not there, just make the visibility of that particular imageview in your recyclerview to View.GONE in your code.
I hope you understood. If any queries, put a comment!
Here a pic of what this code looks like:

You need to create a drawable, set the corners value in the drawable, and set the drawable as the background of the view you want to have the top rounded corners.
here is a working drawable:
<!-- res/drawable/rounded_edittext.xml -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>
<corners android:topLeftRadius="15dp"
android:topRightRadius="15dp"/>
<solid android:color="#ABC123"/>
</shape>

for image holder use this library
<com.makeramen.roundedimageview.RoundedImageView
android:id="#+id/imgUser"
android:layout_width="match_parent"
android:layout_height="100dp"
app:riv_corner_radius_top_left="5dp"
app:riv_corner_radius_top_right="5dp"/>

How make the gif file appear on the center of the screen

I am developing an app, which uses .gif files.
I found, how to implement a gif in Android after lot of surfing, but now the problem is. I am not able to align the gif in the center of the screen.
I tried using gravity as center.
Can anyone help me?
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:components="http://schemas.android.com/apk/lib/com.sample.hello"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android">
<com.sample.hello.GIFView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
components:src="#drawable/gifid"
/>
</LinearLayout>

Use this layout, to center your GIF on the screen
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:components="http://schemas.android.com/apk/lib/com.sample.hello"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android"
>
<com.sample.hello.GIFView
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:layout_centerInParent="true"
components:src="#drawable/gifid"
/>
</RelativeLayout>

Use a relative layout rather than linear, and put center_vertical and center_horizontal to true on the image.

Bitmap gravity set to center not filling the screen even though the image is big enough

I have a RelativeLayout in my Android project. This has it's background set to a Bitmap:
<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:src="#drawable/splash2" />
splash2 is a PNG image sized 2560x1440 pixels. I haven't set the background of the layout directly to the image, because the default scale mode (or gravity) is fill which stretches the image to fit the screen. With center it should take correct size image from the center and show it unscaled. In case of a vertical 1080x1920 screen, it should take that big piece and center it in the layout.
However, I have a problem. The image is bigger than any screen out in the market today. Still, with my Nexus 7, which has a 1920x1080 screen, it has borders around the image. The layout is set to full screen. The image is shrinked vertically.
How do I fix this?

You can use android:gravity="fill" to cover vertical & horizontal direction

For splash image try gravity="center|fill"
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#android:color/black" />
<item>
<bitmap
android:gravity="center|fill"
android:src="#drawable/fondo" />
</item>
</layer-list>

ImageView's scale type centerCrop was what I wanted. Unfortunately I couldn't specify this property for bitmaps. I changed my splash screen layout to FrameLayout and added an ImageView and TextView overlapping each other. This way I was able to achieve what I wanted.
<FrameLayout 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"
tools:context=".SplashScreen"
android:orientation="vertical" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/splash2"
android:scaleType="centerCrop" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/roadSignName"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#FFF"
android:gravity="center_vertical|center_horizontal"
android:padding="10dp"
android:text="My program"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#000000"
android:textSize="40sp" />
</RelativeLayout>
</FrameLayout>

Try adding this to the bitmap:
android:gravity="fill_vertical"
This should fix it.
P.S. Sorry for the first answer, I edited it now.

How do i place a background on an image inside a relativelayout?

NOTE: I have ended up reporting this as a bug to the android project here: http://code.google.com/p/android/issues/detail?id=39159 Please also have a look at the accepted bounty answer, the solution is, unfortunately, to use an absolute (ie specifiying 'dp's rather than 'wrap_content' etc) layout to fix the issue.
I'm getting some VERY strange behaviour when placing a background on an image. I have simplified this down quite heavily to demonstrate the issue to you. What im doing is placing an image in a relativelayout, and also using a background. It seems that giving the relativelayout a padding is causing the background of the image to be missdrawn. Wrap_content seems to be messing up.
Firstly, here is the code that demonstrates the problem. Note that the same behaviour is seen without using a linearlayout and just giving the imageview a background, but this really demonstrates the problem better.
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:padding="5dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/black_bg" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:src="#drawable/red_rectangle" />
</LinearLayout>
</RelativeLayout>
</FrameLayout>
Here is the black_bg xml file:
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#FF000000"/>
</shape>
Here is red_rectangle:
NOTE that this is a reference image, to demonstrate the problem. my actual image has detail, and so cannot be a .9.png
And here is a screenshot of the problem:
You can see that the image width is less than the linearlayout, despite the linearlayout having a width set to "wrap_content". If I set the relativelayout padding to 0dp, this problem dissapears.
This is hopefully a fairly well contained set of resource I'm providing here, so people can try it out themselves if they wish.
For reference, I am using this to provide a border around the image, so I could set the linearlayout (or the image itself) to have a padding, the problem still persists in that case.
EDIT: It appears I probably need a little more context around this, as answers are focussing round how to provide this border. Here is a screenshot of a more contextual layout. I didnt want to include this in the first place as it adds more confusion to the problem:
The FIRST 5dp padding you see is for the content of this entire item (the relativelayout). Then, as i said originally, the idea is that "I could set the linearlayout (or the image itself) to have a padding" in addition to the first padding you see in the relativelayout. Currently, this layout should have NO border shown.

the problem seems to be with the different stretching properties of image(in image view) and the one set as a background(in linear layout). The image set as a backgroung doesnt necessarily maintains the aspect ratio while the image in the image tends to maintain it.
When you give the height of the layout to 60 dp, the image shrinks maintaining the aspect ratio leaving the black strips on the sides.
This works for me:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="60dp"
android:padding="5dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/black_bg" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="60dp"
android:src="#drawable/asd"
android:scaleType="fitXY"
/>
</LinearLayout>
</RelativeLayout>
</FrameLayout>

I believe this is a good candidate of a bug!
Anyway, I understand what you intend to achieve with this layout. The problem is setting the height of your RelativeLayout. I will not ask you to wrap content! Simply, since the height is set to 60dp and padding to 5dp, take a further step and set the height of the LinearLayout to 50dp which is 60-2*5 :)
Finally, to get the border, add a padding of, say, 5dp to your LinearLayout and set the Height of the ImageView to 50dp - 2*5 = 40dp.
This will work perfectly
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:padding="5dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="50dp"
android:padding="5dp"
android:background="#drawable/black_bg" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="40dp"
android:adjustViewBounds="true"
android:src="#drawable/red_rectangle" />
</LinearLayout>
</RelativeLayout>
</FrameLayout>

I dont know why its showing the extra black patch there. Have you tried running the app? The UI editor has some defects, especially when it comes to ImageView..
Now for the border around image, set the background and padding to the ImageView itself. Do not need the LinearLayout. Add the scale type attribute with "centerInside" value.
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:layout_centerInParent="true"
android:adjustViewBounds="true"
android:src="#drawable/red_rectangle"
android:background="#000"
android:scaleType="centerInside"/>

"For reference, I am using this to provide a border around the image"
Add a drawable "border.xml"
<shape xmlns:android:"http://schemas.android.com/apk/res/android" android:shape:"rectangle">
<stroke android:width="5dp" android:color="#FF000000" />
<padding android:left="5dp" android:top="5dp" android:right="5dp" android:bottom="5dp" />
</shape>
set your ImageView background to this drawable.
And lets simplify your layout and center the ImageView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:adjustViewBounds="true"
android:src="#drawable/red_rectangle"
android:background="#drawable/border" />
</RelativeLayout>

Try this ...........
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:padding="5dp" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/black_bg"
**android:padding="5dp"**
>
<ImageView
**android:layout_width="fill_parent"
android:layout_height="fill_parent"**
android:adjustViewBounds="true"
android:src="#drawable/red_rectangle" />
</LinearLayout>
</RelativeLayout>
</FrameLayout>
make your image view like this ..
<ImageView
android:id="#+id/imageViewMyicon"
android:layout_width="30dp"
android:background="#drawable/myiconbackground"
android:layout_height="30dp"
android:src="#drawable/myicon"
android:contentDescription="#string/my_icon"
/>
Inside your drawable myiconbackground.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
android:padding="10dp">
<solid android:color="#0D95BD"/>
<corners android:radius="5dp"/>
<padding android:left="2dp" android:right="2dp" android:top="2dp" android:bottom="2dp"/>
</shape>
i checked this one is working for me , should do for you as well

RelativeLayout behaves different as list view item

Good afternoon droids!
I am facing an annoying layout problem to which i have no explanation after hours and hours of investigation... :/. I created a reduced test case which i present here.
I have a simple list item layout.
list item http://www.freeimagehosting.net/4075a.jpg
lis item image link
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/relativeLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="96dp">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:id="#+id/textView1" android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_centerVertical="true" android:layout_centerHorizontal="true" />
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content" android:text="TextView"
android:id="#+id/textView2" android:layout_alignParentTop="true" />
<ImageView
android:layout_width="10dp"
android:layout_height="match_parent"
android:id="#+id/imageView1"
android:src="#drawable/errorindicator"
android:layout_below="#id/textView2" />
</RelativeLayout>
the errorindicator is a red rectangle, which you can see on the image on the left side. The xml looks like that:
<?xml version="1.0" encoding="utf-8"?>
<shape shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#color/ControllingConflictColor" />
<padding android:left="0dp" android:top="0dp"
android:right="0dp" android:bottom="0dp" />
</shape>
The described list item layout works as expected.
Now i try to fill a list view with list items as described above. The result looks like that:
list view with list items http://www.freeimagehosting.net/4cc4b.jpg
list view image link
The corresponding xml:
<?xml version="1.0" encoding="utf-8"?>
<ListView android:id="#+id/listView1" android:layout_width="fill_parent"
android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Preview: listitem=#layout/test -->
</ListView>
As you can see on the image, the red rectangle does not match it's parent in the height anymore as it should. The images are made from the designer, but the same effect is also on the emulator and device. I am developing for API Level 8.
**I'd love if somebody could explain me, why the described layout does not work as expected in a list view. Why does the shape drawable behave different? **
Thank you for your time :)
edit: i have problems embedding the image, i used a link instead, sorry ;(
edit: added xml-drawable tag.
edit: My example can be even made much more easier. I included two text views because it has some similarity to my real layout. You can remove the two text views from the example and there still exists the problem, that the shape drawable in the image view does not match the parents height as defined, if the layout is used in a list view.

Im also finding it hard to get it done using a RelativeLayout. Well try this layout for your row xml. It uses LinearLayout.
<?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="wrap_content"
android:orientation="vertical">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:id="#+id/textView2"
android:layout_alignParentTop="true" />
<LinearLayout android:layout_width="fill_parent"
android:layout_height="wrap_content">
<LinearLayout android:layout_width="10dip"
android:layout_height="fill_parent"
android:background="#drawable/errorindicator"/>
<TextView android:layout_width="0dip"
android:layout_height="wrap_content"
android:text="TextView" android:layout_weight="1.0"
android:id="#+id/textView1"
android:textAppearance="?android:attr/textAppearanceMedium"
android:gravity="center"/>
</LinearLayout>
</LinearLayout>

Because i guess my desired behaviour is not possible with the give layout manager, i went another way which fits my personal situation.
I have overriden the onDraw method of the RelativeLayout and paint this red rectangle myself (after the layout process finished and the heights are set)...

If you made the asset as a png, you could then 9-patch it and add it as the background of the RelativeLayout