android.widget
Class TabWidget

java.lang.Object
  android.view.View
      android.view.ViewGroup
          android.widget.LinearLayout
              android.widget.TabWidget

All Implemented Interfaces:

Drawable.Callback, KeyEvent.Callback, View.OnFocusChangeListener, ViewManager, ViewParent

public class TabWidget
extends LinearLayout
implements View.OnFocusChangeListener

Displays a list of tab labels representing each page in the parent's tab collection. The container object for this widget is TabHost. When the user selects a tab, this object sends a message to the parent container, TabHost, to tell it to switch the displayed page. You typically won't use many methods directly on this object. The container TabHost is used to add labels, add the callback handler, and manage callbacks. You might call this object to iterate the list of tabs, or to tweak the layout of the tab list, but most methods should be called on the containing TabHost object.

Nested Class Summary

(package private) static interface

TabWidget.OnTabSelectionChanged Let TabHost know that the user clicked on a tab indicator.

Nested classes/interfaces inherited from class android.widget.LinearLayout

LinearLayout.LayoutParams

Nested classes/interfaces inherited from class android.view.ViewGroup

ViewGroup.MarginLayoutParams, ViewGroup.OnHierarchyChangeListener

Nested classes/interfaces inherited from class android.view.View

View.BaseSavedState, View.MeasureSpec, View.OnClickListener, View.OnCreateContextMenuListener, View.OnFocusChangeListener, View.OnKeyListener, View.OnLongClickListener, View.OnTouchListener

Field Summary

Fields inherited from class android.widget.LinearLayout

HORIZONTAL, VERTICAL

Fields inherited from class android.view.ViewGroup

CLIP_TO_PADDING_MASK, FLAG_SUPPORT_STATIC_TRANSFORMATIONS, FLAG_USE_CHILD_DRAWING_ORDER, FOCUS_AFTER_DESCENDANTS, FOCUS_BEFORE_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS, mDisappearingChildren, mGroupFlags, mOnHierarchyChangeListener, mPersistentDrawingCache, PERSISTENT_ALL_CACHES, PERSISTENT_ANIMATION_CACHE, PERSISTENT_NO_CACHE, PERSISTENT_SCROLLING_CACHE

Fields inherited from class android.view.View

DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_LOW, EMPTY_STATE_SET, ENABLED_FOCUSED_SELECTED_STATE_SET, ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_FOCUSED_STATE_SET, ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, ENABLED_SELECTED_STATE_SET, ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_STATE_SET, ENABLED_WINDOW_FOCUSED_STATE_SET, FIRST_STATE_SET, FOCUS_BACKWARD, FOCUS_DOWN, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_UP, FOCUSED_SELECTED_STATE_SET, FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, FOCUSED_STATE_SET, FOCUSED_WINDOW_FOCUSED_STATE_SET, GONE, INVISIBLE, KEEP_SCREEN_ON, LAST_STATE_SET, mBottom, mContext, mCurrentAnimation, MIDDLE_STATE_SET, mLayoutParams, mLeft, mLocation, mMeasuredHeight, mMeasuredWidth, mOnClickListener, mOnCreateContextMenuListener, mOnFocusChangeListener, mOnLongClickListener, mPaddingBottom, mPaddingLeft, mPaddingRight, mPaddingTop, mParent, mRight, mScrollX, mScrollY, mTag, mTop, NO_ID, PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_SELECTED_STATE_SET, PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_STATE_SET, PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET, PRESSED_FIRST_STATE_SET, PRESSED_FOCUSED_SELECTED_STATE_SET, PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_STATE_SET, PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_LAST_STATE_SET, PRESSED_MIDDLE_STATE_SET, PRESSED_SELECTED_STATE_SET, PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_SINGLE_STATE_SET, PRESSED_STATE_SET, PRESSED_WINDOW_FOCUSED_STATE_SET, SCROLLBARS_INSIDE_INSET, SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_OUTSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, SELECTED_STATE_SET, SELECTED_WINDOW_FOCUSED_STATE_SET, SINGLE_STATE_SET, SOUND_EFFECTS_ENABLED, VIEW_LOG_TAG, VISIBLE, WINDOW_FOCUSED_STATE_SET

Constructor Summary

TabWidget(Context context)

TabWidget(Context context, AttributeSet attrs)

TabWidget(Context context, AttributeSet attrs, int defStyle)

Method Summary

void	addView(View child) Adds a child view.
void	childDrawableStateChanged(View child) If {link #addStatesFromChildren} is true, refreshes this group's drawable state (to include the states from its children).
void	dispatchDraw(Canvas canvas) Called by draw to draw the child views.
void	focusCurrentTab(int index) Sets the current tab and focuses the UI on it.
void	onFocusChange(View v, boolean hasFocus) Called when the focus state of a view has changed.
protected void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.
void	setCurrentTab(int index) Sets the current tab.
void	setEnabled(boolean enabled) Set the enabled state of this view.
(package private) void	setTabSelectionListener(TabWidget.OnTabSelectionChanged listener) Provides a way for TabHost to be notified that the user clicked on a tab indicator.

Methods inherited from class android.widget.LinearLayout

checkLayoutParams, generateDefaultLayoutParams, generateLayoutParams, generateLayoutParams, getBaseline, getBaselineAlignedChildIndex, getChildrenSkipCount, getLocationOffset, getNextLocationOffset, getOrientation, getVirtualChildAt, getVirtualChildCount, getWeightSum, isBaselineAligned, layoutHorizontal, layoutVertical, measureChildBeforeLayout, measureHorizontal, measureNullChild, measureVertical, onLayout, onMeasure, setBaselineAligned, setBaselineAlignedChildIndex, setGravity, setHorizontalGravity, setOrientation, setVerticalGravity, setWeightSum

Methods inherited from class android.view.ViewGroup

addFocusables, addStatesFromChildren, addTouchables, addView, addView, addView, addView, addViewInLayout, addViewInLayout, attachLayoutAnimationParameters, attachViewToParent, bringChildToFront, canAnimate, cleanupLayoutState, clearChildFocus, clearDisappearingChildren, clearFocus, debug, detachAllViewsFromParent, detachViewFromParent, detachViewFromParent, detachViewsFromParent, dispatchFreezeSelfOnly, dispatchKeyEvent, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchSetPressed, dispatchSetSelected, dispatchThawSelfOnly, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchWindowFocusChanged, dispatchWindowVisibilityChanged, drawableStateChanged, drawChild, findFocus, findViewTraversal, findViewWithTagTraversal, fitSystemWindows, focusableViewAvailable, focusSearch, gatherTransparentRegion, getChildAt, getChildCount, getChildDrawingOrder, getChildMeasureSpec, getChildStaticTransformation, getChildVisibleRect, getDescendantFocusability, getFocusedChild, getLayoutAnimation, getLayoutAnimationListener, getPersistentDrawingCache, hasFocus, hasFocusable, indexOfChild, invalidateChild, invalidateChildInParent, isAlwaysDrawnWithCacheEnabled, isAnimationCacheEnabled, isChildrenDrawnWithCacheEnabled, measureChild, measureChildren, measureChildWithMargins, offsetChildrenTopAndBottom, offsetDescendantRectToMyCoords, offsetRectIntoDescendantCoords, onAnimationEnd, onAnimationStart, onCreateDrawableState, onInterceptTouchEvent, onRequestFocusInDescendants, recomputeViewAttributes, removeAllViews, removeAllViewsInLayout, removeDetachedView, removeView, removeViewAt, removeViewInLayout, removeViews, removeViewsInLayout, requestChildFocus, requestChildRectangleOnScreen, requestDisallowInterceptTouchEvent, requestFocus, requestTransparentRegion, scheduleLayoutAnimation, setAddStatesFromChildren, setAlwaysDrawnWithCacheEnabled, setAnimationCacheEnabled, setChildrenDrawingCacheEnabled, setChildrenDrawnWithCacheEnabled, setClipChildren, setClipToPadding, setDescendantFocusability, setLayoutAnimation, setLayoutAnimationListener, setOnHierarchyChangeListener, setPadding, setPersistentDrawingCache, showContextMenuForChild, startLayoutAnimation, updateViewLayout

Methods inherited from class android.view.View

applyDrawableToTransparentRegion, bringToFront, buildDrawingCache, cancelLongPress, clearAnimation, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeScroll, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createContextMenu, debug, debugIndent, destroyDrawingCache, dispatchKeyShortcutEvent, draw, finalize, findViewById, findViewWithTag, focusSearch, forceLayout, getAnimation, getApplicationWindowToken, getBackground, getBottom, getBottomFadingEdgeStrength, getContext, getContextMenuInfo, getDefaultSize, getDrawableState, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getFocusables, getFocusedRect, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHeight, getHitRect, getHorizontalFadingEdgeLength, getHorizontalScrollbarHeight, getId, getKeepScreenOn, getLayoutParams, getLeft, getLeftFadingEdgeStrength, getLocalVisibleRect, getLocationInWindow, getLocationOnScreen, getMeasuredHeight, getMeasuredWidth, getNextFocusDownId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getPaddingBottom, getPaddingLeft, getPaddingRight, getPaddingTop, getParent, getResources, getRight, getRightFadingEdgeStrength, getRootView, getScrollBarStyle, getScrollX, getScrollY, getSolidColor, getSuggestedMinimumHeight, getSuggestedMinimumWidth, getTag, getTop, getTopFadingEdgeStrength, getTouchables, getTouchDelegate, getVerticalFadingEdgeLength, getVerticalScrollbarWidth, getViewTreeObserver, getVisibility, getWidth, getWindowAttachCount, getWindowToken, getWindowVisibility, hasWindowFocus, inflate, initializeFadingEdge, initializeScrollbars, invalidate, invalidate, invalidate, invalidateDrawable, isClickable, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isInTouchMode, isLayoutRequested, isLongClickable, isPressed, isRootNamespace, isSaveEnabled, isSelected, isShown, isSoundEffectsEnabled, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, layout, measure, mergeDrawableStates, offsetLeftAndRight, offsetTopAndBottom, onAttachedToWindow, onCreateContextMenu, onDetachedFromWindow, onDraw, onFinishInflate, onFocusChanged, onKeyDown, onKeyMultiple, onKeyShortcut, onKeyUp, onRestoreInstanceState, onSaveInstanceState, onScrollChanged, onSetAlpha, onTouchEvent, onTrackballEvent, onWindowFocusChanged, onWindowVisibilityChanged, performClick, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, refreshDrawableState, removeCallbacks, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestRectangleOnScreen, requestRectangleOnScreen, resolveSize, restoreHierarchyState, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, setAnimation, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setClickable, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setFadingEdgeLength, setFocusable, setFocusableInTouchMode, setFrame, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setId, setIsRootNamespace, setKeepScreenOn, setLayoutParams, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNextFocusDownId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnClickListener, setOnCreateContextMenuListener, setOnFocusChangeListener, setOnKeyListener, setOnLongClickListener, setOnTouchListener, setPressed, setSaveEnabled, setScrollBarStyle, setSelected, setSoundEffectsEnabled, setTag, setTouchDelegate, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVisibility, setWillNotCacheDrawing, setWillNotDraw, showContextMenu, startAnimation, unscheduleDrawable, unscheduleDrawable, verifyDrawable, willNotCacheDrawing, willNotDraw

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface android.view.ViewParent

createContextMenu, getParent, isLayoutRequested, requestLayout

Constructor Detail

TabWidget

public TabWidget(Context context)

TabWidget

public TabWidget(Context context,
                 AttributeSet attrs)

TabWidget

public TabWidget(Context context,
                 AttributeSet attrs,
                 int defStyle)

Method Detail

onSizeChanged

protected void onSizeChanged(int w,
                             int h,
                             int oldw,
                             int oldh)

Description copied from class: View

This is called during layout when the size of this view has changed. If you were just added to the view hierarchy, you're called with the old values of 0.

Overrides:

onSizeChanged in class View

Parameters:

w - Current width of this view.

h - Current height of this view.

oldw - Old width of this view.

oldh - Old height of this view.

childDrawableStateChanged

public void childDrawableStateChanged(View child)

Description copied from class: ViewGroup

If {link #addStatesFromChildren} is true, refreshes this group's drawable state (to include the states from its children).

Specified by:

childDrawableStateChanged in interface ViewParent

Overrides:

childDrawableStateChanged in class ViewGroup

Parameters:

child - The child whose drawable state has changed.

dispatchDraw

public void dispatchDraw(Canvas canvas)

Description copied from class: ViewGroup

Called by draw to draw the child views. This may be overridden by derived classes to gain control just before its children are drawn (but after its own view has been drawn).

Overrides:

dispatchDraw in class ViewGroup

Parameters:

canvas - the canvas on which to draw the view

setCurrentTab

public void setCurrentTab(int index)

Sets the current tab. This method is used to bring a tab to the front of the Widget, and is used to post to the rest of the UI that a different tab has been brought to the foreground. Note, this is separate from the traditional "focus" that is employed from the view logic. For instance, if we have a list in a tabbed view, a user may be navigating up and down the list, moving the UI focus (orange highlighting) through the list items. The cursor movement does not effect the "selected" tab though, because what is being scrolled through is all on the same tab. The selected tab only changes when we navigate between tabs (moving from the list view to the next tabbed view, in this example). To move both the focus AND the selected tab at once, please use setCurrentTab(int). Normally, the view logic takes care of adjusting the focus, so unless you're circumventing the UI, you'll probably just focus your interest here.

Parameters:

index - The tab that you want to indicate as the selected tab (tab brought to the front of the widget)

See Also:

focusCurrentTab(int)

focusCurrentTab

public void focusCurrentTab(int index)

Sets the current tab and focuses the UI on it. This method makes sure that the focused tab matches the selected tab, normally at setCurrentTab(int). Normally this would not be an issue if we go through the UI, since the UI is responsible for calling TabWidget.onFocusChanged(), but in the case where we are selecting the tab programmatically, we'll need to make sure focus keeps up.

Parameters:

index - The tab that you want focused (highlighted in orange) and selected (tab brought to the front of the widget)

See Also:

setCurrentTab(int)

setEnabled

public void setEnabled(boolean enabled)

Description copied from class: View

Set the enabled state of this view. The interpretation of the enabled state varies by subclass.

Overrides:

setEnabled in class View

Parameters:

enabled - True if this view is enabled, false otherwise.

addView

public void addView(View child)

Description copied from class: ViewGroup

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.

Overrides:

addView in class ViewGroup

Parameters:

child - the child view to add

See Also:

ViewGroup.generateDefaultLayoutParams()

setTabSelectionListener

void setTabSelectionListener(TabWidget.OnTabSelectionChanged listener)

Provides a way for TabHost to be notified that the user clicked on a tab indicator.

onFocusChange

public void onFocusChange(View v,
                          boolean hasFocus)

Description copied from interface: View.OnFocusChangeListener

Called when the focus state of a view has changed.

Specified by:

onFocusChange in interface View.OnFocusChangeListener

Parameters:

v - The view whose state has changed.

hasFocus - The new focus state of v.