# RadioGroup.LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
# LayoutParams
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/android/widget/RadioGroup.LayoutParams "View this page in Java")
```
open class LayoutParams : LinearLayout.LayoutParams
```
|---|---|---|---|----------------------------------------------------------------------------------------------------------------------------------|
| [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) |||||
| ↳ | [android.view.ViewGroup.LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#) ||||
| | ↳ | [android.view.ViewGroup.MarginLayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#) |||
| | | ↳ | [android.widget.LinearLayout.LayoutParams](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams) ||
| | | | ↳ | [android.widget.RadioGroup.LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#) |
This set of layout parameters defaults the width and the height of the children to[WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)when they are not specified in the XML file. Otherwise, this class ussed the value read from the XML file.
See[LinearLayout Attributes](https://developer.android.com/reference/kotlin/android/R.styleable.html#LinearLayout_Layout:kotlin.IntArray)for a list of all child view attributes that this class supports.
## Summary
| Inherited XML attributes ||
|---|---|
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams) |-------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [android:layout_gravity](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams#attr_LayoutParams) | Gravity specifies how a component should be placed in its group of cells. The default is[android.view.Gravity#TOP](https://developer.android.com/reference/kotlin/android/view/Gravity.html#TOP:kotlin.Int). See[android.widget.LinearLayout#setGravity(int)](https://developer.android.com/reference/kotlin/android/widget/LinearLayout#setGravity(kotlin.Int)). Must be one or more (separated by '\|') of the following constant values. | Constant | Value | Description | |-------------------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | bottom | 50 | Push object to the bottom of its container, not changing its size. | | center | 11 | Place the object in the center of its container in both the vertical and horizontal axis, not changing its size. | | center_horizontal | 1 | Place object in the horizontal center of its container, not changing its size. | | center_vertical | 10 | Place object in the vertical center of its container, not changing its size. | | clip_horizontal | 8 | Additional option that can be set to have the left and/or right edges of the child clipped to its container's bounds. The clip will be based on the horizontal gravity: a left gravity will clip the right edge, a right gravity will clip the left edge, and neither will clip both edges. | | clip_vertical | 80 | Additional option that can be set to have the top and/or bottom edges of the child clipped to its container's bounds. The clip will be based on the vertical gravity: a top gravity will clip the bottom edge, a bottom gravity will clip the top edge, and neither will clip both edges. | | end | 800005 | Push object to the end of its container, not changing its size. | | fill | 77 | Grow the horizontal and vertical size of the object if needed so it completely fills its container. | | fill_horizontal | 7 | Grow the horizontal size of the object if needed so it completely fills its container. | | fill_vertical | 70 | Grow the vertical size of the object if needed so it completely fills its container. | | left | 3 | Push object to the left of its container, not changing its size. | | right | 5 | Push object to the right of its container, not changing its size. | | start | 800003 | Push object to the beginning of its container, not changing its size. | | top | 30 | Push object to the top of its container, not changing its size. |
| | [android:layout_weight](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams#attr_LayoutParams) | Indicates how much of the extra space in the LinearLayout is allocated to the view associated with these LayoutParams. Specify 0 if the view should not be stretched. Otherwise the extra pixels will be pro-rated among all views whose weight is greater than 0. May be a floating point value, such as "`1.2`".
| ||
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#) |------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [android:layout_height](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#attr_LayoutParams) | Specifies the basic height of the view. This is a required attribute for any view inside of a containing layout manager. Its value may be a dimension (such as "12dip") for a constant height or one of the special constants. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters). Must be one of the following constant values. | Constant | Value | Description | |--------------|----------|--------------------------------------------------------------------------------------------------------------------------------------------------| | fill_parent | ffffffff | The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by`match_parent`. | | match_parent | ffffffff | The view should be as big as its parent (minus padding). Introduced in API Level 8. | | wrap_content | fffffffe | The view should be only big enough to enclose its content (plus padding). |
| | [android:layout_width](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#attr_LayoutParams) | Specifies the basic width of the view. This is a required attribute for any view inside of a containing layout manager. Its value may be a dimension (such as "12dip") for a constant width or one of the special constants. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters). Must be one of the following constant values. | Constant | Value | Description | |--------------|----------|--------------------------------------------------------------------------------------------------------------------------------------------------| | fill_parent | ffffffff | The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by`match_parent`. | | match_parent | ffffffff | The view should be as big as its parent (minus padding). Introduced in API Level 8. | | wrap_content | fffffffe | The view should be only big enough to enclose its content (plus padding). |
| ||
| From class[MarginLayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#) |----------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [android:layout_margin](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the left, top, right and bottom sides of this view. If both layout_margin and any of layout_marginLeft, layout_marginRight, layout_marginStart, layout_marginEnd, layout_marginTop, and layout_marginBottom are also specified, the layout_margin value will take precedence over the edge-specific values. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginBottom](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the bottom side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginEnd](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the end side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginHorizontal](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the left and right sides of this view. Specifying layout_marginHorizontal is equivalent to specifying layout_marginLeft and layout_marginRight. If both layout_marginHorizontal and either/both of layout_marginLeft and layout_marginRight are also specified, the layout_marginHorizontal value will take precedence over the edge-specific values. Also, layout_margin will always take precedence over any of these values, including layout_marginHorizontal. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginLeft](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the left side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginRight](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the right side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginStart](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the start side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginTop](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the top side of this view. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| | [android:layout_marginVertical](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#attr_MarginLayoutParams) | Specifies extra space on the top and bottom sides of this view. Specifying layout_marginVertical is equivalent to specifying layout_marginTop and layout_marginBottom with that same value. If both layout_marginVertical and either/both of layout_marginTop and layout_marginBottom are also specified, the layout_marginVertical value will take precedence over the edge-specific values. Also, layout_margin will always take precedence over any of these values, including layout_marginVertical. This space is outside this view's bounds. Margin values should be positive. May be a dimension value, which is a floating point number appended with a unit such as "`14.5sp`". Available units are: px (pixels), dp (density-independent pixels), sp (scaled pixels based on preferred font size), in (inches), and mm (millimeters).
| ||
| Inherited constants ||
|---|---|
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#) |----------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [FILL_PARENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#FILL_PARENT:kotlin.Int)
Special value for the height or width requested by a View. FILL_PARENT means that the view wants to be as big as its parent, minus the parent's padding, if any. This value is deprecated starting in API Level 8 and replaced by[MATCH_PARENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#MATCH_PARENT:kotlin.Int).
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [MATCH_PARENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#MATCH_PARENT:kotlin.Int)
Special value for the height or width requested by a View. MATCH_PARENT means that the view wants to be as big as its parent, minus the parent's padding, if any. Introduced in API Level 8.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)
Special value for the height or width requested by a View. WRAP_CONTENT means that the view wants to be just large enough to fit its own internal content, taking its own padding into account.
| ||
| Public constructors ||
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---|
| [LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#LayoutParams(android.content.Context,%20android.util.AttributeSet))`(`c:` `[Context](https://developer.android.com/reference/kotlin/android/content/Context.html#)!`, `attrs:` `[AttributeSet](https://developer.android.com/reference/kotlin/android/util/AttributeSet.html#)!`)`
|
| [LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#LayoutParams(android.view.ViewGroup.LayoutParams))`(`p:` `[ViewGroup.LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#)!`)`
|
| [LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#LayoutParams(android.view.ViewGroup.MarginLayoutParams))`(`source:` `[ViewGroup.MarginLayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#)!`)`
|
| [LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#LayoutParams(kotlin.Int,%20kotlin.Int))`(`w:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `h:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
|
| [LayoutParams](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#LayoutParams(kotlin.Int,%20kotlin.Int,%20kotlin.Float))`(`w:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `h:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `initWeight:` `[Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html)`)`
|
| Protected methods ||
|----------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| open[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setBaseAttributes](https://developer.android.com/reference/kotlin/android/widget/RadioGroup.LayoutParams#setBaseAttributes(android.content.res.TypedArray,%20kotlin.Int,%20kotlin.Int))`(`a:` `[TypedArray](https://developer.android.com/reference/kotlin/android/content/res/TypedArray.html#)!`, `widthAttr:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `heightAttr:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Fixes the child's width to[android.view.ViewGroup.LayoutParams#WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)and the child's height to[android.view.ViewGroup.LayoutParams#WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)when not specified in the XML file. |
| Inherited functions ||
|---|---|
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams) |-----------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [debug](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams#debug(kotlin.String))`(`output:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
| ||
| From class[MarginLayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#) |------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getLayoutDirection](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#getLayoutDirection())`()`
Retuns the layout direction. Can be either[View.LAYOUT_DIRECTION_LTR](https://developer.android.com/reference/kotlin/android/view/View.html#LAYOUT_DIRECTION_LTR:kotlin.Int)or[View.LAYOUT_DIRECTION_RTL](https://developer.android.com/reference/kotlin/android/view/View.html#LAYOUT_DIRECTION_RTL:kotlin.Int).
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getMarginEnd](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#getMarginEnd())`()`
Returns the end margin in pixels.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getMarginStart](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#getMarginStart())`()`
Returns the start margin in pixels.
| | [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isMarginRelative](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#isMarginRelative())`()`
Check if margins are relative.
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [resolveLayoutDirection](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#resolveLayoutDirection(kotlin.Int))`(`layoutDirection:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
This will be called by[android.view.View#requestLayout()](https://developer.android.com/reference/kotlin/android/view/View.html#requestLayout()). Left and Right margins may be overridden depending on layout direction.
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setLayoutDirection](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#setLayoutDirection(kotlin.Int))`(`layoutDirection:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
Set the layout direction
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setMarginEnd](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#setMarginEnd(kotlin.Int))`(`end:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
Sets the relative end margin. Margin values should be positive.
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setMarginStart](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#setMarginStart(kotlin.Int))`(`start:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
Sets the relative start margin. Margin values should be positive.
| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setMargins](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#setMargins(kotlin.Int,%20kotlin.Int,%20kotlin.Int,%20kotlin.Int))`(`left:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `top:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `right:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `bottom:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
Sets the margins, in pixels. A call to[android.view.View#requestLayout()](https://developer.android.com/reference/kotlin/android/view/View.html#requestLayout())needs to be done so that the new margins are taken into account. Left and right margins may be overridden by[android.view.View#requestLayout()](https://developer.android.com/reference/kotlin/android/view/View.html#requestLayout())depending on layout direction. Margin values should be positive.
| ||
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#) |------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [setBaseAttributes](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#setBaseAttributes(android.content.res.TypedArray,%20kotlin.Int,%20kotlin.Int))`(`a:` `[TypedArray](https://developer.android.com/reference/kotlin/android/content/res/TypedArray.html#)!`, `widthAttr:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `heightAttr:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)`
Extracts the layout parameters from the supplied attributes.
| ||
| Inherited properties ||
|---|---|
| From class[MarginLayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#) |----------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [bottomMargin](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#bottomMargin:kotlin.Int)
The bottom margin in pixels of the child. Margin values should be positive. Call[ViewGroup.setLayoutParams(LayoutParams)](https://developer.android.com/reference/kotlin/android/view/View.html#setLayoutParams(android.view.ViewGroup.LayoutParams))after reassigning a new value to this field.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [leftMargin](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#leftMargin:kotlin.Int)
The left margin in pixels of the child. Margin values should be positive. Call[ViewGroup.setLayoutParams(LayoutParams)](https://developer.android.com/reference/kotlin/android/view/View.html#setLayoutParams(android.view.ViewGroup.LayoutParams))after reassigning a new value to this field.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [rightMargin](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#rightMargin:kotlin.Int)
The right margin in pixels of the child. Margin values should be positive. Call[ViewGroup.setLayoutParams(LayoutParams)](https://developer.android.com/reference/kotlin/android/view/View.html#setLayoutParams(android.view.ViewGroup.LayoutParams))after reassigning a new value to this field.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [topMargin](https://developer.android.com/reference/kotlin/android/view/ViewGroup.MarginLayoutParams.html#topMargin:kotlin.Int)
The top margin in pixels of the child. Margin values should be positive. Call[ViewGroup.setLayoutParams(LayoutParams)](https://developer.android.com/reference/kotlin/android/view/View.html#setLayoutParams(android.view.ViewGroup.LayoutParams))after reassigning a new value to this field.
| ||
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams) |--------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [gravity](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams#gravity:kotlin.Int)
Gravity for the view associated with these LayoutParams.
| | [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [weight](https://developer.android.com/reference/kotlin/android/widget/LinearLayout.LayoutParams#weight:kotlin.Float)
Indicates how much of the extra space in the LinearLayout will be allocated to the view associated with these LayoutParams. Specify 0 if the view should not be stretched. Otherwise the extra pixels will be pro-rated among all views whose weight is greater than 0.
| ||
| From class[LayoutParams](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#) |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [height](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#height:kotlin.Int)
Information about how tall the view wants to be. Can be one of the constants FILL_PARENT (replaced by MATCH_PARENT in API Level 8) or WRAP_CONTENT, or an exact size.
| | [LayoutAnimationController.AnimationParameters](https://developer.android.com/reference/kotlin/android/view/animation/LayoutAnimationController.AnimationParameters.html#)! | [layoutAnimationParameters](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#layoutAnimationParameters:android.view.animation.LayoutAnimationController.AnimationParameters)
Used to animate layouts.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [width](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#width:kotlin.Int)
Information about how wide the view wants to be. Can be one of the constants FILL_PARENT (replaced by MATCH_PARENT in API Level 8) or WRAP_CONTENT, or an exact size.
| ||
## Public constructors
### LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
LayoutParams(
c: Context!,
attrs: AttributeSet!)
```
### LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
LayoutParams(p: ViewGroup.LayoutParams!)
```
### LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
LayoutParams(source: ViewGroup.MarginLayoutParams!)
```
### LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
LayoutParams(
w: Int,
h: Int)
```
### LayoutParams
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
LayoutParams(
w: Int,
h: Int,
initWeight: Float)
```
## Protected methods
### setBaseAttributes
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
protected open fun setBaseAttributes(
a: TypedArray!,
widthAttr: Int,
heightAttr: Int
): Unit
```
Fixes the child's width to[android.view.ViewGroup.LayoutParams#WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)and the child's height to[android.view.ViewGroup.LayoutParams#WRAP_CONTENT](https://developer.android.com/reference/kotlin/android/view/ViewGroup.LayoutParams.html#WRAP_CONTENT:kotlin.Int)when not specified in the XML file.
| Parameters ||
|--------------|------------------------------------------------------------------------------------------------------------------------------|
| `a` | [TypedArray](https://developer.android.com/reference/kotlin/android/content/res/TypedArray.html#)!:the styled attributes set |
| `widthAttr` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):the width attribute to fetch |
| `heightAttr` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):the height attribute to fetch |