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TabLayout

public class TabLayout
extends HorizontalScrollView

java.lang.Object
   ↳ android.view.View
     ↳ android.view.ViewGroup
       ↳ android.widget.FrameLayout
         ↳ android.widget.HorizontalScrollView
           ↳ android.support.design.widget.TabLayout


TabLayout provides a horizontal layout to display tabs.

Population of the tabs to display is done through TabLayout.Tab instances. You create tabs via newTab(). From there you can change the tab's label or icon via setText(int) and setIcon(int) respectively. To display the tab, you need to add it to the layout via one of the addTab(Tab) methods. For example:

 TabLayout tabLayout = ...;
 tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
 tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
 tabLayout.addTab(tabLayout.newTab().setText("Tab 3"));
 
You should set a listener via setOnTabSelectedListener(OnTabSelectedListener) to be notified when any tab's selection state has been changed.

You can also add items to TabLayout in your layout through the use of TabItem. An example usage is like so:

 <android.support.design.widget.TabLayout
         android:layout_height="wrap_content"
         android:layout_width="match_parent">

     <android.support.design.widget.TabItem
             android:text="@string/tab_text"/>

     <android.support.design.widget.TabItem
             android:icon="@drawable/ic_android"/>

 </android.support.design.widget.TabLayout>
 

ViewPager integration

If you're using a ViewPager together with this layout, you can call setupWithViewPager(ViewPager) to link the two together. This layout will be automatically populated from the PagerAdapter's page titles.

This view also supports being used as part of a ViewPager's decor, and can be added directly to the ViewPager in a layout resource file like so:

 <android.support.v4.view.ViewPager
     android:layout_width="match_parent"
     android:layout_height="match_parent">

     <android.support.design.widget.TabLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="top" />

 </android.support.v4.view.ViewPager>
 

See also:

Summary

Nested classes

interface TabLayout.OnTabSelectedListener

Callback interface invoked when a tab's selection state changes. 

class TabLayout.Tab

A tab in this layout. 

class TabLayout.TabLayoutOnPageChangeListener

A ViewPager.OnPageChangeListener class which contains the necessary calls back to the provided TabLayout so that the tab position is kept in sync. 

class TabLayout.ViewPagerOnTabSelectedListener

A TabLayout.OnTabSelectedListener class which contains the necessary calls back to the provided ViewPager so that the tab position is kept in sync. 

XML attributes

android.support.design:tabBackground Reference to a background to be applied to tabs. 
android.support.design:tabContentStart Position in the Y axis from the starting edge that tabs should be positioned from. 
android.support.design:tabGravity Gravity constant for tabs. 
android.support.design:tabIndicatorColor Color of the indicator used to show the currently selected tab. 
android.support.design:tabIndicatorHeight Height of the indicator used to show the currently selected tab. 
android.support.design:tabMaxWidth The maximum width for tabs. 
android.support.design:tabMinWidth The minimum width for tabs. 
android.support.design:tabMode The behavior mode for the Tabs in this layout

Must be one of the following constant values. 

android.support.design:tabPadding The preferred padding along all edges of tabs. 
android.support.design:tabPaddingBottom The preferred padding along the bottom edge of tabs. 
android.support.design:tabPaddingEnd The preferred padding along the end edge of tabs. 
android.support.design:tabPaddingStart The preferred padding along the start edge of tabs. 
android.support.design:tabPaddingTop The preferred padding along the top edge of tabs. 
android.support.design:tabSelectedTextColor The text color to be applied to the currently selected tab. 
android.support.design:tabTextAppearance A reference to a TextAppearance style to be applied to tabs. 
android.support.design:tabTextColor The default text color to be applied to tabs. 

Inherited XML attributes

From class android.widget.HorizontalScrollView
From class android.widget.FrameLayout
From class android.view.ViewGroup
From class android.view.View

Constants

int GRAVITY_CENTER

Gravity used to lay out the tabs in the center of the TabLayout.

int GRAVITY_FILL

Gravity used to fill the TabLayout as much as possible.

int MODE_FIXED

Fixed tabs display all tabs concurrently and are best used with content that benefits from quick pivots between tabs.

int MODE_SCROLLABLE

Scrollable tabs display a subset of tabs at any given moment, and can contain longer tab labels and a larger number of tabs.

Inherited constants

From class android.view.ViewGroup
From class android.view.View

Inherited fields

From class android.view.View

Public constructors

TabLayout(Context context)
TabLayout(Context context, AttributeSet attrs)
TabLayout(Context context, AttributeSet attrs, int defStyleAttr)

Public methods

void addOnTabSelectedListener(TabLayout.OnTabSelectedListener listener)

Add a TabLayout.OnTabSelectedListener that will be invoked when tab selection changes.

void addTab(TabLayout.Tab tab, boolean setSelected)

Add a tab to this layout.

void addTab(TabLayout.Tab tab, int position)

Add a tab to this layout.

void addTab(TabLayout.Tab tab)

Add a tab to this layout.

void addTab(TabLayout.Tab tab, int position, boolean setSelected)

Add a tab to this layout.

void addView(View child, int index)

Adds a child view.

void addView(View child)

Adds a child view.

void addView(View child, ViewGroup.LayoutParams params)

Adds a child view with the specified layout parameters.

void addView(View child, int index, ViewGroup.LayoutParams params)

Adds a child view with the specified layout parameters.

void clearOnTabSelectedListeners()

Remove all previously added TabLayout.OnTabSelectedListeners.

FrameLayout.LayoutParams generateLayoutParams(AttributeSet attrs)

Returns a new set of layout parameters based on the supplied attributes set.

int getSelectedTabPosition()

Returns the position of the current selected tab.

TabLayout.Tab getTabAt(int index)

Returns the tab at the specified index.

int getTabCount()

Returns the number of tabs currently registered with the action bar.

int getTabGravity()

The current gravity used for laying out tabs.

int getTabMode()

Returns the current mode used by this TabLayout.

ColorStateList getTabTextColors()

Gets the text colors for the different states (normal, selected) used for the tabs.

TabLayout.Tab newTab()

Create and return a new TabLayout.Tab.

void removeAllTabs()

Remove all tabs from the action bar and deselect the current tab.

void removeOnTabSelectedListener(TabLayout.OnTabSelectedListener listener)

Remove the given TabLayout.OnTabSelectedListener that was previously added via addOnTabSelectedListener(OnTabSelectedListener).

void removeTab(TabLayout.Tab tab)

Remove a tab from the layout.

void removeTabAt(int position)

Remove a tab from the layout.

void setOnTabSelectedListener(TabLayout.OnTabSelectedListener listener)

This method is deprecated. Use addOnTabSelectedListener(OnTabSelectedListener) and removeOnTabSelectedListener(OnTabSelectedListener).

void setScrollPosition(int position, float positionOffset, boolean updateSelectedText)

Set the scroll position of the tabs.

void setSelectedTabIndicatorColor(int color)

Sets the tab indicator's color for the currently selected tab.

void setSelectedTabIndicatorHeight(int height)

Sets the tab indicator's height for the currently selected tab.

void setTabGravity(int gravity)

Set the gravity to use when laying out the tabs.

void setTabMode(int mode)

Set the behavior mode for the Tabs in this layout.

void setTabTextColors(int normalColor, int selectedColor)

Sets the text colors for the different states (normal, selected) used for the tabs.

void setTabTextColors(ColorStateList textColor)

Sets the text colors for the different states (normal, selected) used for the tabs.

void setTabsFromPagerAdapter(PagerAdapter adapter)

This method is deprecated. Use setupWithViewPager(ViewPager) to link a TabLayout with a ViewPager together. When that method is used, the TabLayout will be automatically updated when the PagerAdapter is changed.

void setupWithViewPager(ViewPager viewPager, boolean autoRefresh)

The one-stop shop for setting up this TabLayout with a ViewPager.

void setupWithViewPager(ViewPager viewPager)

The one-stop shop for setting up this TabLayout with a ViewPager.

boolean shouldDelayChildPressedState()

Return true if the pressed state should be delayed for children or descendants of this ViewGroup.

Protected methods

void onAttachedToWindow()

This is called when the view is attached to a window.

void onDetachedFromWindow()

This is called when the view is detached from a window.

void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

Measure the view and its content to determine the measured width and the measured height.

Inherited methods

From class android.widget.HorizontalScrollView
From class android.widget.FrameLayout
From class android.view.ViewGroup
From class android.view.View
From class java.lang.Object
From interface android.view.ViewParent
From interface android.view.ViewManager
From interface android.graphics.drawable.Drawable.Callback
From interface android.view.KeyEvent.Callback
From interface android.view.accessibility.AccessibilityEventSource

XML attributes

android.support.design:tabBackground

Reference to a background to be applied to tabs.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

android.support.design:tabContentStart

Position in the Y axis from the starting edge that tabs should be positioned from.

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.support.design:tabGravity

Gravity constant for tabs.

Must be one of the following constant values.

ConstantValueDescription
center1
fill0

Related methods:

android.support.design:tabIndicatorColor

Color of the indicator used to show the currently selected tab.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb#aarrggbb".

Related methods:

android.support.design:tabIndicatorHeight

Height of the indicator used to show the currently selected tab.

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).

Related methods:

android.support.design:tabMaxWidth

The maximum width for tabs.

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.support.design:tabMinWidth

The minimum width for tabs.

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.support.design:tabMode

The behavior mode for the Tabs in this layout

Must be one of the following constant values.

ConstantValueDescription
fixed1
scrollable0

Related methods:

android.support.design:tabPadding

The preferred padding along all edges of tabs.

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.support.design:tabPaddingBottom

The preferred padding along the bottom edge of tabs.

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.support.design:tabPaddingEnd

The preferred padding along the end edge of tabs.

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.support.design:tabPaddingStart

The preferred padding along the start edge of tabs.

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.support.design:tabPaddingTop

The preferred padding along the top edge of tabs.

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.support.design:tabSelectedTextColor

The text color to be applied to the currently selected tab.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb#aarrggbb".

Related methods:

android.support.design:tabTextAppearance

A reference to a TextAppearance style to be applied to tabs.

May be a reference to another resource, in the form "@[+][package:]type/name" or a theme attribute in the form "?[package:]type/name".

android.support.design:tabTextColor

The default text color to be applied to tabs.

May be a color value, in the form of "#rgb", "#argb", "#rrggbb#aarrggbb".

Related methods:

Constants

GRAVITY_CENTER

int GRAVITY_CENTER

Gravity used to lay out the tabs in the center of the TabLayout.

See also:

Constant Value: 1 (0x00000001)

GRAVITY_FILL

int GRAVITY_FILL

Gravity used to fill the TabLayout as much as possible. This option only takes effect when used with MODE_FIXED.

See also:

Constant Value: 0 (0x00000000)

MODE_FIXED

int MODE_FIXED

Fixed tabs display all tabs concurrently and are best used with content that benefits from quick pivots between tabs. The maximum number of tabs is limited by the view’s width. Fixed tabs have equal width, based on the widest tab label.

See also:

Constant Value: 1 (0x00000001)

MODE_SCROLLABLE

int MODE_SCROLLABLE

Scrollable tabs display a subset of tabs at any given moment, and can contain longer tab labels and a larger number of tabs. They are best used for browsing contexts in touch interfaces when users don’t need to directly compare the tab labels.

See also:

Constant Value: 0 (0x00000000)

Public constructors

TabLayout

TabLayout (Context context)

Parameters
context Context

TabLayout

TabLayout (Context context, 
                AttributeSet attrs)

Parameters
context Context
attrs AttributeSet

TabLayout

TabLayout (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

Parameters
context Context
attrs AttributeSet
defStyleAttr int

Public methods

addOnTabSelectedListener

void addOnTabSelectedListener (TabLayout.OnTabSelectedListener listener)

Add a TabLayout.OnTabSelectedListener that will be invoked when tab selection changes.

Components that add a listener should take care to remove it when finished via removeOnTabSelectedListener(OnTabSelectedListener).

Parameters
listener TabLayout.OnTabSelectedListener: listener to add

addTab

void addTab (TabLayout.Tab tab, 
                boolean setSelected)

Add a tab to this layout. The tab will be added at the end of the list.

Parameters
tab TabLayout.Tab: Tab to add
setSelected boolean: True if the added tab should become the selected tab.

addTab

void addTab (TabLayout.Tab tab, 
                int position)

Add a tab to this layout. The tab will be inserted at position. If this is the first tab to be added it will become the selected tab.

Parameters
tab TabLayout.Tab: The tab to add
position int: The new position of the tab

addTab

void addTab (TabLayout.Tab tab)

Add a tab to this layout. The tab will be added at the end of the list. If this is the first tab to be added it will become the selected tab.

Parameters
tab TabLayout.Tab: Tab to add

addTab

void addTab (TabLayout.Tab tab, 
                int position, 
                boolean setSelected)

Add a tab to this layout. The tab will be inserted at position.

Parameters
tab TabLayout.Tab: The tab to add
position int: The new position of the tab
setSelected boolean: True if the added tab should become the selected tab.

addView

void addView (View child, 
                int index)

Adds a child view. If no layout parameters are already set on the child, the default parameters for this ViewGroup are set on the child.

Note: do not invoke this method from draw(android.graphics.Canvas), onDraw(android.graphics.Canvas), dispatchDraw(android.graphics.Canvas) or any related method.

Parameters
child View: the child view to add
index int: the position at which to add the child

addView

void addView (View child)

Adds a child view. If no layout parameters are already set on the child, the default parameters for this ViewGroup are set on the child.

Note: do not invoke this method from draw(android.graphics.Canvas), onDraw(android.graphics.Canvas), dispatchDraw(android.graphics.Canvas) or any related method.

Parameters
child View: the child view to add

addView

void addView (View child, 
                ViewGroup.LayoutParams params)

Adds a child view with the specified layout parameters.

Note: do not invoke this method from draw(android.graphics.Canvas), onDraw(android.graphics.Canvas), dispatchDraw(android.graphics.Canvas) or any related method.

Parameters
child View: the child view to add
params ViewGroup.LayoutParams: the layout parameters to set on the child

addView

void addView (View child, 
                int index, 
                ViewGroup.LayoutParams params)

Adds a child view with the specified layout parameters.

Note: do not invoke this method from draw(android.graphics.Canvas), onDraw(android.graphics.Canvas), dispatchDraw(android.graphics.Canvas) or any related method.

Parameters
child View: the child view to add
index int: the position at which to add the child or -1 to add last
params ViewGroup.LayoutParams: the layout parameters to set on the child

clearOnTabSelectedListeners

void clearOnTabSelectedListeners ()

Remove all previously added TabLayout.OnTabSelectedListeners.

generateLayoutParams

FrameLayout.LayoutParams generateLayoutParams (AttributeSet attrs)

Returns a new set of layout parameters based on the supplied attributes set.

Parameters
attrs AttributeSet: the attributes to build the layout parameters from
Returns
FrameLayout.LayoutParams an instance of ViewGroup.LayoutParams or one of its descendants

getSelectedTabPosition

int getSelectedTabPosition ()

Returns the position of the current selected tab.

Returns
int selected tab position, or -1 if there isn't a selected tab.

getTabAt

TabLayout.Tab getTabAt (int index)

Returns the tab at the specified index.

Parameters
index int
Returns
TabLayout.Tab

getTabCount

int getTabCount ()

Returns the number of tabs currently registered with the action bar.

Returns
int Tab count

getTabGravity

int getTabGravity ()

The current gravity used for laying out tabs.

Returns
int one of GRAVITY_CENTER or GRAVITY_FILL.

getTabMode

int getTabMode ()

Returns the current mode used by this TabLayout.

Returns
int

See also:

getTabTextColors

ColorStateList getTabTextColors ()

Gets the text colors for the different states (normal, selected) used for the tabs.

Returns
ColorStateList

newTab

TabLayout.Tab newTab ()

Create and return a new TabLayout.Tab. You need to manually add this using addTab(Tab) or a related method.

Returns
TabLayout.Tab A new Tab

See also:

removeAllTabs

void removeAllTabs ()

Remove all tabs from the action bar and deselect the current tab.

removeOnTabSelectedListener

void removeOnTabSelectedListener (TabLayout.OnTabSelectedListener listener)

Remove the given TabLayout.OnTabSelectedListener that was previously added via addOnTabSelectedListener(OnTabSelectedListener).

Parameters
listener TabLayout.OnTabSelectedListener: listener to remove

removeTab

void removeTab (TabLayout.Tab tab)

Remove a tab from the layout. If the removed tab was selected it will be deselected and another tab will be selected if present.

Parameters
tab TabLayout.Tab: The tab to remove

removeTabAt

void removeTabAt (int position)

Remove a tab from the layout. If the removed tab was selected it will be deselected and another tab will be selected if present.

Parameters
position int: Position of the tab to remove

setOnTabSelectedListener

void setOnTabSelectedListener (TabLayout.OnTabSelectedListener listener)

This method is deprecated.
Use addOnTabSelectedListener(OnTabSelectedListener) and removeOnTabSelectedListener(OnTabSelectedListener).

Parameters
listener TabLayout.OnTabSelectedListener

setScrollPosition

void setScrollPosition (int position, 
                float positionOffset, 
                boolean updateSelectedText)

Set the scroll position of the tabs. This is useful for when the tabs are being displayed as part of a scrolling container such as ViewPager.

Calling this method does not update the selected tab, it is only used for drawing purposes.

Parameters
position int: current scroll position
positionOffset float: Value from [0, 1) indicating the offset from position.
updateSelectedText boolean: Whether to update the text's selected state.

setSelectedTabIndicatorColor

void setSelectedTabIndicatorColor (int color)

Sets the tab indicator's color for the currently selected tab.

Related XML Attributes:

Parameters
color int: color to use for the indicator

setSelectedTabIndicatorHeight

void setSelectedTabIndicatorHeight (int height)

Sets the tab indicator's height for the currently selected tab.

Related XML Attributes:

Parameters
height int: height to use for the indicator in pixels

setTabGravity

void setTabGravity (int gravity)

Set the gravity to use when laying out the tabs.

Related XML Attributes:

Parameters
gravity int: one of GRAVITY_CENTER or GRAVITY_FILL.

setTabMode

void setTabMode (int mode)

Set the behavior mode for the Tabs in this layout. The valid input options are:

  • MODE_FIXED: Fixed tabs display all tabs concurrently and are best used with content that benefits from quick pivots between tabs.
  • MODE_SCROLLABLE: Scrollable tabs display a subset of tabs at any given moment, and can contain longer tab labels and a larger number of tabs. They are best used for browsing contexts in touch interfaces when users don’t need to directly compare the tab labels. This mode is commonly used with a ViewPager.

Related XML Attributes:

Parameters
mode int: one of MODE_FIXED or MODE_SCROLLABLE.

setTabTextColors

void setTabTextColors (int normalColor, 
                int selectedColor)

Sets the text colors for the different states (normal, selected) used for the tabs.

Related XML Attributes:

Parameters
normalColor int
selectedColor int

setTabTextColors

void setTabTextColors (ColorStateList textColor)

Sets the text colors for the different states (normal, selected) used for the tabs.

Parameters
textColor ColorStateList

See also:

setTabsFromPagerAdapter

void setTabsFromPagerAdapter (PagerAdapter adapter)

This method is deprecated.
Use setupWithViewPager(ViewPager) to link a TabLayout with a ViewPager together. When that method is used, the TabLayout will be automatically updated when the PagerAdapter is changed.

Parameters
adapter PagerAdapter

setupWithViewPager

void setupWithViewPager (ViewPager viewPager, 
                boolean autoRefresh)

The one-stop shop for setting up this TabLayout with a ViewPager.

This method will link the given ViewPager and this TabLayout together so that changes in one are automatically reflected in the other. This includes scroll state changes and clicks. The tabs displayed in this layout will be populated from the ViewPager adapter's page titles.

If autoRefresh is true, any changes in the PagerAdapter will trigger this layout to re-populate itself from the adapter's titles.

If the given ViewPager is non-null, it needs to already have a PagerAdapter set.

Parameters
viewPager ViewPager: the ViewPager to link to, or null to clear any previous link
autoRefresh boolean: whether this layout should refresh its contents if the given ViewPager's content changes

setupWithViewPager

void setupWithViewPager (ViewPager viewPager)

The one-stop shop for setting up this TabLayout with a ViewPager.

This is the same as calling setupWithViewPager(ViewPager, boolean) with auto-refresh enabled.

Parameters
viewPager ViewPager: the ViewPager to link to, or null to clear any previous link

shouldDelayChildPressedState

boolean shouldDelayChildPressedState ()

Return true if the pressed state should be delayed for children or descendants of this ViewGroup. Generally, this should be done for containers that can scroll, such as a List. This prevents the pressed state from appearing when the user is actually trying to scroll the content. The default implementation returns true for compatibility reasons. Subclasses that do not scroll should generally override this method and return false.

Returns
boolean

Protected methods

onAttachedToWindow

void onAttachedToWindow ()

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(android.graphics.Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

onDetachedFromWindow

void onDetachedFromWindow ()

This is called when the view is detached from a window. At this point it no longer has a surface for drawing.

onMeasure

void onMeasure (int widthMeasureSpec, 
                int heightMeasureSpec)

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overridden by subclasses to provide accurate and efficient measurement of their contents.

CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

Parameters
widthMeasureSpec int: horizontal space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.
heightMeasureSpec int: vertical space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.
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