GridLayout.LayoutParams

Artifact: androidx.gridlayout:gridlayout

Added in 1.0.0

Kotlin |Java

public class GridLayout.LayoutParams extends ViewGroup.MarginLayoutParams

java.lang.Object
↳	android.view.ViewGroup.LayoutParams
	↳	android.view.ViewGroup.MarginLayoutParams
		↳	androidx.gridlayout.widget.GridLayout.LayoutParams

Layout information associated with each of the children of a GridLayout.

GridLayout supports both row and column spanning and arbitrary forms of alignment within each cell group. The fundamental parameters associated with each cell group are gathered into their vertical and horizontal components and stored in the rowSpec and columnSpec layout parameters. Specs are immutable structures and may be shared between the layout parameters of different children.

The row and column specs contain the leading and trailing indices along each axis and together specify the four grid indices that delimit the cells of this cell group.

The alignment properties of the row and column specs together specify both aspects of alignment within the cell group. It is also possible to specify a child's alignment within its cell group by using the setGravity method.

The weight property is also included in Spec and specifies the proportion of any excess space that is due to the associated view.

WRAP_CONTENT and MATCH_PARENT

Because the default values of the width and height properties are both WRAP_CONTENT, this value never needs to be explicitly declared in the layout parameters of GridLayout's children. In addition, GridLayout does not distinguish the special size value MATCH_PARENT from WRAP_CONTENT. A component's ability to expand to the size of the parent is instead controlled by the principle of flexibility, as discussed in GridLayout.

Summary

You should not need to use either of the special size values: WRAP_CONTENT or MATCH_PARENT when configuring the children of a GridLayout.

Default values

width = WRAP_CONTENT
height = WRAP_CONTENT
topMargin = 0 when useDefaultMargins is false; otherwise UNDEFINED, to indicate that a default value should be computed on demand.
leftMargin = 0 when useDefaultMargins is false; otherwise UNDEFINED, to indicate that a default value should be computed on demand.
bottomMargin = 0 when useDefaultMargins is false; otherwise UNDEFINED, to indicate that a default value should be computed on demand.
rightMargin = 0 when useDefaultMargins is false; otherwise UNDEFINED, to indicate that a default value should be computed on demand.
rowSpec.row = UNDEFINED
rowSpec.rowSpan = 1
rowSpec.alignment = BASELINE
rowSpec.weight = 0
columnSpec.column = UNDEFINED
columnSpec.columnSpan = 1
columnSpec.alignment = START
columnSpec.weight = 0

See GridLayout for a more complete description of the conventions used by GridLayout in the interpretation of the properties of this class.

name android:row

name android:rowSpan

name android:rowWeight

name android:column

name android:columnSpan

name android:columnWeight

name android:gravity

Summary

Public fields
`GridLayout.Spec`	`columnSpec` The spec that defines the horizontal characteristics of the cell group described by these layout parameters.
`GridLayout.Spec`	`rowSpec` The spec that defines the vertical characteristics of the cell group described by these layout parameters.

Public constructors
`LayoutParams()` Constructs a new LayoutParams with default values as defined in `LayoutParams`.
`LayoutParams(ViewGroup.LayoutParams params)`
`LayoutParams(ViewGroup.MarginLayoutParams params)`
`LayoutParams(GridLayout.LayoutParams source)` Copy constructor.
`LayoutParams(Context context, AttributeSet attrs)` Values not defined in the attribute set take the default values defined in `LayoutParams`.
`LayoutParams(GridLayout.Spec rowSpec, GridLayout.Spec columnSpec)` Constructs a new LayoutParams instance for this `rowSpec` and `columnSpec`.

Public methods
`boolean`	`equals(Object o)`
`int`	`hashCode()`
`void`	`setGravity(int gravity)` Describes how the child views are positioned.

Protected methods
`void`	`setBaseAttributes(TypedArray attributes, int widthAttr, int heightAttr)`

Inherited Constants

From android.view.ViewGroup.LayoutParams

`static final int`	`FILL_PARENT = -1` This field is deprecated.
`static final int`	`MATCH_PARENT = -1`
`static final int`	`WRAP_CONTENT = -2`

Inherited fields

From android.view.ViewGroup.LayoutParams

`int`	`height`
`LayoutAnimationController.AnimationParameters`	`layoutAnimationParameters`
`int`	`width`

From android.view.ViewGroup.MarginLayoutParams

`int`	`bottomMargin`
`int`	`leftMargin`
`int`	`rightMargin`
`int`	`topMargin`

Inherited methods

From android.view.ViewGroup.MarginLayoutParams

`int`	`getLayoutDirection()`
`int`	`getMarginEnd()`
`int`	`getMarginStart()`
`boolean`	`isMarginRelative()`
`void`	`resolveLayoutDirection(int layoutDirection)`
`void`	`setLayoutDirection(int layoutDirection)`
`void`	`setMarginEnd(int end)`
`void`	`setMarginStart(int start)`
`void`	`setMargins(int left, int top, int right, int bottom)`

Public fields

columnSpec

Added in 1.0.0

public GridLayout.Spec columnSpec

The spec that defines the horizontal characteristics of the cell group described by these layout parameters. If an assignment is made to this field after a measurement or layout operation has already taken place, a call to setLayoutParams must be made to notify GridLayout of the change. GridLayout is normally able to detect when code fails to observe this rule, issue a warning and take steps to compensate for the omission. This facility is implemented on a best effort basis and should not be relied upon in production code - so it is best to include the above calls to remove the warnings as soon as it is practical.

rowSpec

Added in 1.0.0

public GridLayout.Spec rowSpec

The spec that defines the vertical characteristics of the cell group described by these layout parameters. If an assignment is made to this field after a measurement or layout operation has already taken place, a call to setLayoutParams must be made to notify GridLayout of the change. GridLayout is normally able to detect when code fails to observe this rule, issue a warning and take steps to compensate for the omission. This facility is implemented on a best effort basis and should not be relied upon in production code - so it is best to include the above calls to remove the warnings as soon as it is practical.

Public constructors

LayoutParams

Added in 1.0.0

public LayoutParams()

Constructs a new LayoutParams with default values as defined in LayoutParams.

LayoutParams

Added in 1.0.0

public LayoutParams(ViewGroup.LayoutParams params)

LayoutParams

Added in 1.0.0

public LayoutParams(ViewGroup.MarginLayoutParams params)

Added in 1.0.0

public LayoutParams(GridLayout.LayoutParams source)

Copy constructor. Clones the width, height, margin values, row spec, and column spec of the source.

Parameters
`GridLayout.LayoutParams source`	The layout params to copy from.

LayoutParams

Added in 1.0.0

public LayoutParams(Context context, AttributeSet attrs)

Values not defined in the attribute set take the default values defined in LayoutParams.

Added in 1.0.0

public LayoutParams(GridLayout.Spec rowSpec, GridLayout.Spec columnSpec)

Constructs a new LayoutParams instance for this rowSpec and columnSpec. All other fields are initialized with default values as defined in LayoutParams.

Parameters
`GridLayout.Spec rowSpec`	the rowSpec
`GridLayout.Spec columnSpec`	the columnSpec

Public methods

equals

public boolean equals(Object o)

hashCode

public int hashCode()

setGravity

Added in 1.0.0

public void setGravity(int gravity)

Describes how the child views are positioned. Default is LEFT | BASELINE. See Gravity.

name android:gravity

Parameters
`int gravity`	the new gravity value

Protected methods

setBaseAttributes

protected void setBaseAttributes(TypedArray attributes, int widthAttr, int heightAttr)