emphasized text
If I keep 16dp as margin all around 4 sides,why 16 dp length or width is different from left and top?
In the second image,as you can see I have set height as wrap_content and margin is 0 from top too.But still it is applying space from top.So,why it is doing that?What if I add some margin from top?
Because you have to set the android:layout_width and android:layout_height to match_constraint or the special 0dp value inside the layout.xml file. Otherwise looks like you're using wrap_content so it's respecting the constraints by adapting the view to its size.
I have several elements at the right side of the screen. Each element should have 16dp margin from the right side. Some elements are clickable and those elements need additional 4dp padding. Is it possible somehow to set margin to 16dp for all elements but elements that have padding could reduce the margin value to "margin - padding"?
I am using a ConstraintLayout with two views inside. An ImageView that varies in size depending on the image loaded and a View which acts as a custom made dropshadow for the Image. What I've been doing so far is adding 8dp padding to the ImageView and then aligning all of the edges of the View to the ImageViews, thereby making the View stick out 8dp underneath the ImageView.
Now for several reasons I don't want to keep the padding on the ImageView but I still want to achieve the same effect. So basically I would like to align the Left of the View to 8dp left of the Left of the ImageView (and the same for every other edge, right, top, bottom).
Is there any way to achieve this?
Thanks in advance!
I´ve been having problems with this too, it seems ConstraintLayout does not support negative margins yet: https://code.google.com/p/android/issues/detail?id=235306.
In my case, I want a 20dp negative margin to a set of overlapping images on a header image. So far, I'm positioning an empty TextView below the guideline my header image is connected to, with a 20dp top margin and aligning my overlapping image views to that.
I have a very small question which occurred while reading wrap content and parent content that what is plus padding and minus padding?
According to me i think plus padding means increase distance (from margin) x-axis and decrease x-axis . is it so?
Related answer: Difference between a View's Padding and Margin
Padding can be seen as an internal margin, or a margin applied to elements inside the padded element, as seen in f.ex. a TextView, where a padding would shift the text away from the border, or make the TextView larger to accomodate the padding. In a layout, using padding will shift all the content away from the padded edges. Using negative padding will shift the content towards the edges, so using android:paddingLeft = "-5px" would shift the content to the left
Yes you are right.
For example ->
android:paddingLeft = "4dp" means it will take shift the text to right by 4dp.
android:paddingLeft = "-4dp" means it will take shift the text to left by 4dp.
This question already has answers here:
Difference between a View's Padding and Margin
(15 answers)
Closed 4 years ago.
I have referred questions on SO. ALso checked an answer:
Padding is the space inside the border, between the border and the actual view's content. Note that padding goes completely around the content: there is padding on the top, bottom, right and left sides (which can be independent).
Margins are the spaces outside the border, between the border and the other elements next to this view. In the image, the margin is the grey area outside the entire object. Note that, like the padding, the margin goes completely around the content: there are margins on the top, bottom, right, and left sides.
Also, more on padding and margins from:
http://developer.android.com/reference/android/view/View.html
http://developer.android.com/reference/android/view/ViewGroup.MarginLayoutParams.html
But what is the difference fundamentally between padding and margins ? Would the behaviour differ depending on O.S. and devices?
I have a normal, simple layout. No problem with code, have used layout folders - layout and layout-sw600dp plus drawables-4dpi. Can't make layout without margin or padding, which one is more appropriate?
Margin
Margins make up the vertical and horizontal areas between elements. If elements have no margins around them, they will bump right up against each other. In other words, he space outside of, or between, elements is what comprises the margin areas.
Padding
The padding of an element is the horizontal and vertical space that’s set around the content area of the targeted element. So padding is on the inside of a box, not the outside.
Padding is for inside/within components. Eg. TextView , Button, EditText etc.
Eg. space between the Text and Border
Margin is to be applied for the on-outside of the components.
Eg. space between left edge of the screen and border of your component
Visual representation is great in : Difference between a View's Padding and Margin
With Padding, i have seen a difference in 2.2, 2.3 and say 4.3, 4.4
in such cases:
<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"
tools:context=".MainActivity" >
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:text="ASDFGHJKL" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="15dp"
android:text="#string/hello_world" />
</RelativeLayout>
Also, check the use of dimens:
http://developer.android.com/guide/topics/resources/more-resources.html
In Simple words .. if you want to take your widget like TextView, EditText far away from other. You should use margin from top,right,left,bottom.
By increasing padding it will increase the inner spacing not making the widget far apart from others..
Like buttons, for example, the characteristic button background image includes the padding, but not the margin. In other words, adding more padding makes the button look visually bigger, while adding more margin just makes the gap between the button and the next control wider.
Margin: Between border and its parent layout
Padding: Between content and border
refer to this
The difference between margin and padding and use cases are clearly explained by +Nick Butcher in Udacity's video. Here's the excerpt:
...if you want the touchable area or the background of the object to be enlarged, then use padding, otherwise use margin...
what is the difference fundamentally between padding and margins ?
For the differences - Rohan Khandwal has shared a very perfect link.
Would the behaviour differ depending on O.S. and devices?
Now If we are talking about the behaviour of the view which has been given diffrent margins & padding. Then It will definitely look diffrent in different devices with diffrent resolutions.
Thats why we are given diffrent dimen/values/layout folders which have their own meanings.
The difference between android margin and padding is that even though the text is how much sp you want away from the edge, margin is not spaced or colored in. It is only the text and the color you set with it all "alone". With padding though, the text is away from the edge of the screen just like margin but, in padding the text is away and all the space between the text and the edge of the screen is filled in with the color or any text preference you chose to be. This is the difference between android margin and android padding.
Padding is the space inside the border, between the border and the actual view's content. Note that padding goes completely around the content: there is padding on the top, bottom, right and left sides (which can be independent).
Margins are the spaces outside the border, between the border and the other elements next to this view. In the image, the margin is the grey area outside the entire object. Note that, like the padding, the margin goes completely around the content: there are margins on the top, bottom, right, and left sides.
Padding Increases the size of the view where as margin doesn't because it is outside the view
The padding is expressed in pixels for the left, top, right, and bottom parts of the view. Padding can be used to offset the content of the view by a specific amount of pixels.
For instance, a left padding of 2 will push the view's content by 2 pixels to the right of the left edge.
Padding can be set using the setPadding(int, int, int, int) method and queried by calling getPaddingLeft(), getPaddingTop(), getPaddingRight(), and getPaddingBottom().
Margins are the spaces outside the border, between the border and the other elements next to this view.
Note that, like the padding, the margin goes completely around the content :there are margins on the top, bottom, right, and left sides.
Margin can be set using the setMargins(int left, int top, int right, int bottom) method.