AbsSeekBar

Returns the amount of progress changed via the arrow keys.

By default, this will be a value that is derived from the max progress.

Return the drawable used to represent the scroll thumb - the component that the user can drag back and forth indicating the current value by its position.

Call Drawable.jumpToCurrentState() on all Drawable objects associated with this view.

Initializes an AccessibilityEvent with information about this View which is the event source. In other words, the source of an accessibility event is the view whose state change triggered firing the event.

Example: Setting the password property of an event in addition to properties set by the super implementation:

 public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
     super.onInitializeAccessibilityEvent(event);
     event.setPassword(true);
 }

If an View.AccessibilityDelegate has been specified via calling setAccessibilityDelegate(AccessibilityDelegate) its onInitializeAccessibilityEvent(View, AccessibilityEvent) is responsible for handling this call.

Note: Always call the super implementation before adding information to the event, in case the default implementation has basic information to add.

Initializes an AccessibilityNodeInfo with information about this view. The base implementation sets:

• setParent(View),
• setBoundsInParent(Rect),
• setBoundsInScreen(Rect),
• setPackageName(CharSequence),
• setClassName(CharSequence),
• setContentDescription(CharSequence),
• setEnabled(boolean),
• setClickable(boolean),
• setFocusable(boolean),
• setFocused(boolean),
• setLongClickable(boolean),
• setSelected(boolean),

Subclasses should override this method, call the super implementation, and set additional attributes.

If an View.AccessibilityDelegate has been specified via calling setAccessibilityDelegate(AccessibilityDelegate) its onInitializeAccessibilityNodeInfo(View, AccessibilityNodeInfo) is responsible for handling this call.

Default implementation of KeyEvent.Callback.onKeyDown(): perform press of the view when KEYCODE_DPAD_CENTER or KEYCODE_ENTER is released, if the view is enabled and clickable.

Key presses in software keyboards will generally NOT trigger this listener, although some may elect to do so in some situations. Do not rely on this to catch software key presses.

Called when any RTL property (layout direction or text direction or text alignment) has been changed. Subclasses need to override this method to take care of cached information that depends on the resolved layout direction, or to inform child views that inherit their layout direction. The default implementation does nothing.

Implement this method to handle touch screen motion events.

If this method is used to detect click actions, it is recommended that the actions be performed by implementing and calling performClick(). This will ensure consistent system behavior, including:

• obeying click sound preferences
• dispatching OnClickListener calls
• handling ACTION_CLICK when accessibility features are enabled

Performs the specified accessibility action on the view. For possible accessibility actions look at AccessibilityNodeInfo.

If an View.AccessibilityDelegate has been specified via calling setAccessibilityDelegate(AccessibilityDelegate) its performAccessibilityAction(View, int, Bundle) is responsible for handling this call.

Sets the amount of progress changed via the arrow keys.

Set the range of the progress bar to 0...max.

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

If the thumb is a valid drawable (i.e. not null), half its width will be used as the new thumb offset (@see #setThumbOffset(int)).

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

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.

Implement this to do your drawing.

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()).

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.

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.