android.widget
Class AbsSeekBar

java.lang.Object
  android.view.View
      android.widget.ProgressBar
          android.widget.AbsSeekBar

All Implemented Interfaces:

Drawable.Callback, KeyEvent.Callback

Direct Known Subclasses:

RatingBar, SeekBar

public abstract class AbsSeekBar
extends ProgressBar

Nested Class Summary

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.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, 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, 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_FOCUSED_SELECTED_STATE_SET, PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_STATE_SET, PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_SELECTED_STATE_SET, PRESSED_SELECTED_WINDOW_FOCUSED_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, SOUND_EFFECTS_ENABLED, VIEW_LOG_TAG, VISIBLE, WINDOW_FOCUSED_STATE_SET

Constructor Summary

AbsSeekBar(Context context)

AbsSeekBar(Context context, AttributeSet attrs)

AbsSeekBar(Context context, AttributeSet attrs, int defStyle)

Method Summary

protected void	drawableStateChanged() This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
int	getThumbOffset()
protected void	onDraw(Canvas canvas) Implement this to do your drawing.
protected void	onMeasure(int widthMeasureSpec, int heightMeasureSpec) Measure the view and its content to determine the measured width and the measured height.
protected void	onSizeChanged(int w, int h, int oldw, int oldh) This is called during layout when the size of this view has changed.
boolean	onTouchEvent(MotionEvent event) Implement this method to handle touch screen motion events.
void	setThumb(Drawable thumb) Sets the thumb that will be drawn at the end of the progress meter within the SeekBar
void	setThumbOffset(int thumbOffset) Sets the thumb offset that allows the thumb to extend out of the range of the track.
protected boolean	verifyDrawable(Drawable who) If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.

Methods inherited from class android.widget.ProgressBar

getIndeterminateDrawable, getInterpolator, getMax, getProgress, getProgressDrawable, getSecondaryProgress, incrementProgressBy, incrementSecondaryProgressBy, invalidateDrawable, isIndeterminate, postInvalidate, setIndeterminate, setIndeterminateDrawable, setInterpolator, setInterpolator, setMax, setProgress, setProgressDrawable, setSecondaryProgress, setVisibility

Methods inherited from class android.view.View

addFocusables, addTouchables, bringToFront, buildDrawingCache, cancelLongPress, clearAnimation, clearFocus, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeScroll, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createContextMenu, destroyDrawingCache, dispatchDraw, dispatchKeyEvent, dispatchKeyShortcutEvent, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchSetPressed, dispatchSetSelected, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchWindowFocusChanged, dispatchWindowVisibilityChanged, draw, finalize, findFocus, findViewById, findViewWithTag, fitSystemWindows, focusSearch, forceLayout, getAnimation, getApplicationWindowToken, getBackground, getBaseline, 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, hasFocus, hasFocusable, hasWindowFocus, inflate, initializeFadingEdge, initializeScrollbars, invalidate, invalidate, invalidate, isClickable, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isInTouchMode, isLayoutRequested, isLongClickable, isPressed, isSaveEnabled, isSelected, isShown, isSoundEffectsEnabled, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, layout, measure, mergeDrawableStates, offsetLeftAndRight, offsetTopAndBottom, onAnimationEnd, onAnimationStart, onAttachedToWindow, onCreateContextMenu, onCreateDrawableState, onDetachedFromWindow, onFinishInflate, onFocusChanged, onKeyDown, onKeyMultiple, onKeyShortcut, onKeyUp, onLayout, onRestoreInstanceState, onSaveInstanceState, onScrollChanged, onSetAlpha, onTrackballEvent, onWindowFocusChanged, onWindowVisibilityChanged, performClick, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, refreshDrawableState, removeCallbacks, requestFocus, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestRectangleOnScreen, requestRectangleOnScreen, resolveSize, restoreHierarchyState, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, setAnimation, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setClickable, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setEnabled, setFadingEdgeLength, setFocusable, setFocusableInTouchMode, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setId, setKeepScreenOn, setLayoutParams, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNextFocusDownId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnClickListener, setOnCreateContextMenuListener, setOnFocusChangeListener, setOnKeyListener, setOnLongClickListener, setOnTouchListener, setPadding, setPressed, setSaveEnabled, setScrollBarStyle, setSelected, setSoundEffectsEnabled, setTag, setTouchDelegate, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setWillNotCacheDrawing, setWillNotDraw, showContextMenu, startAnimation, unscheduleDrawable, unscheduleDrawable, willNotCacheDrawing, willNotDraw

Methods inherited from class java.lang.Object

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

Constructor Detail

AbsSeekBar

public AbsSeekBar(Context context)

AbsSeekBar

public AbsSeekBar(Context context,
                  AttributeSet attrs)

AbsSeekBar

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

Method Detail

setThumb

public void setThumb(Drawable thumb)

Sets the thumb that will be drawn at the end of the progress meter within the SeekBar

Parameters:

thumb - Drawable representing the thumb

getThumbOffset

public int getThumbOffset()

See Also:

setThumbOffset(int)

setThumbOffset

public void setThumbOffset(int thumbOffset)

Sets the thumb offset that allows the thumb to extend out of the range of the track.

Parameters:

thumbOffset - The offset amount in pixels.

verifyDrawable

protected boolean verifyDrawable(Drawable who)

If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying. This allows animations for those drawables to be scheduled.

Be sure to call through to the super class when overriding this function.

Overrides:

verifyDrawable in class ProgressBar

Parameters:

who - The Drawable to verify. Return true if it is one you are displaying, else return the result of calling through to the super class.

Returns:

boolean If true than the Drawable is being displayed in the view; else false and it is not allowed to animate.

See Also:

unscheduleDrawable(Drawable), drawableStateChanged()

drawableStateChanged

protected void drawableStateChanged()

This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.

Be sure to call through to the superclass when overriding this function.

Overrides:

drawableStateChanged in class View

See Also:

setState(int[])

onSizeChanged

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

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 ProgressBar

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.

onDraw

protected void onDraw(Canvas canvas)

Implement this to do your drawing.

Overrides:

onDraw in class ProgressBar

Parameters:

canvas - the canvas on which the background will be drawn

onMeasure

protected 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 overriden 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()).

Overrides:

onMeasure in class ProgressBar

Parameters:

widthMeasureSpec - horizontal space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.

heightMeasureSpec - vertical space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.

See Also:

getMeasuredWidth(), getMeasuredHeight(), setMeasuredDimension(int, int), getSuggestedMinimumHeight(), getSuggestedMinimumWidth(), getMode(int), getSize(int)

onTouchEvent

public boolean onTouchEvent(MotionEvent event)

Implement this method to handle touch screen motion events.

Overrides:

onTouchEvent in class View

Parameters:

event - The motion event.

Returns:

True if the event was handled, false otherwise.