| Methods Summary |
|---|
| public void | addOnComputeInternalInsetsListener(android.view.ViewTreeObserver$OnComputeInternalInsetsListener listener)Register a callback to be invoked when the invoked when it is time to
compute the window's internal insets.
checkIsAlive();
if (mOnComputeInternalInsetsListeners == null) {
mOnComputeInternalInsetsListeners =
new CopyOnWriteArrayList<OnComputeInternalInsetsListener>();
}
mOnComputeInternalInsetsListeners.add(listener);
|
| public void | addOnGlobalFocusChangeListener(android.view.ViewTreeObserver$OnGlobalFocusChangeListener listener)Register a callback to be invoked when the focus state within the view tree changes.
checkIsAlive();
if (mOnGlobalFocusListeners == null) {
mOnGlobalFocusListeners = new CopyOnWriteArrayList<OnGlobalFocusChangeListener>();
}
mOnGlobalFocusListeners.add(listener);
|
| public void | addOnGlobalLayoutListener(android.view.ViewTreeObserver$OnGlobalLayoutListener listener)Register a callback to be invoked when the global layout state or the visibility of views
within the view tree changes
checkIsAlive();
if (mOnGlobalLayoutListeners == null) {
mOnGlobalLayoutListeners = new CopyOnWriteArrayList<OnGlobalLayoutListener>();
}
mOnGlobalLayoutListeners.add(listener);
|
| public void | addOnPreDrawListener(android.view.ViewTreeObserver$OnPreDrawListener listener)Register a callback to be invoked when the view tree is about to be drawn
checkIsAlive();
if (mOnPreDrawListeners == null) {
mOnPreDrawListeners = new CopyOnWriteArrayList<OnPreDrawListener>();
}
mOnPreDrawListeners.add(listener);
|
| public void | addOnScrollChangedListener(android.view.ViewTreeObserver$OnScrollChangedListener listener)Register a callback to be invoked when a view has been scrolled.
checkIsAlive();
if (mOnScrollChangedListeners == null) {
mOnScrollChangedListeners = new CopyOnWriteArrayList<OnScrollChangedListener>();
}
mOnScrollChangedListeners.add(listener);
|
| public void | addOnTouchModeChangeListener(android.view.ViewTreeObserver$OnTouchModeChangeListener listener)Register a callback to be invoked when the invoked when the touch mode changes.
checkIsAlive();
if (mOnTouchModeChangeListeners == null) {
mOnTouchModeChangeListeners = new CopyOnWriteArrayList<OnTouchModeChangeListener>();
}
mOnTouchModeChangeListeners.add(listener);
|
| private void | checkIsAlive()
if (!mAlive) {
throw new IllegalStateException("This ViewTreeObserver is not alive, call "
+ "getViewTreeObserver() again");
}
|
| final void | dispatchOnComputeInternalInsets(android.view.ViewTreeObserver$InternalInsetsInfo inoutInfo)Calls all listeners to compute the current insets.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
final CopyOnWriteArrayList<OnComputeInternalInsetsListener> listeners =
mOnComputeInternalInsetsListeners;
if (listeners != null) {
for (OnComputeInternalInsetsListener listener : listeners) {
listener.onComputeInternalInsets(inoutInfo);
}
}
|
| final void | dispatchOnGlobalFocusChange(View oldFocus, View newFocus)Notifies registered listeners that focus has changed.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
final CopyOnWriteArrayList<OnGlobalFocusChangeListener> listeners = mOnGlobalFocusListeners;
if (listeners != null) {
for (OnGlobalFocusChangeListener listener : listeners) {
listener.onGlobalFocusChanged(oldFocus, newFocus);
}
}
|
| public final void | dispatchOnGlobalLayout()Notifies registered listeners that a global layout happened. This can be called
manually if you are forcing a layout on a View or a hierarchy of Views that are
not attached to a Window or in the GONE state.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
final CopyOnWriteArrayList<OnGlobalLayoutListener> listeners = mOnGlobalLayoutListeners;
if (listeners != null) {
for (OnGlobalLayoutListener listener : listeners) {
listener.onGlobalLayout();
}
}
|
| public final boolean | dispatchOnPreDraw()Notifies registered listeners that the drawing pass is about to start. If a
listener returns true, then the drawing pass is canceled and rescheduled. This can
be called manually if you are forcing the drawing on a View or a hierarchy of Views
that are not attached to a Window or in the GONE state.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
boolean cancelDraw = false;
final CopyOnWriteArrayList<OnPreDrawListener> listeners = mOnPreDrawListeners;
if (listeners != null) {
for (OnPreDrawListener listener : listeners) {
cancelDraw |= !listener.onPreDraw();
}
}
return cancelDraw;
|
| final void | dispatchOnScrollChanged()Notifies registered listeners that something has scrolled.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
final CopyOnWriteArrayList<OnScrollChangedListener> listeners = mOnScrollChangedListeners;
if (listeners != null) {
for (OnScrollChangedListener listener : listeners) {
listener.onScrollChanged();
}
}
|
| final void | dispatchOnTouchModeChanged(boolean inTouchMode)Notifies registered listeners that the touch mode has changed.
// NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to
// perform the dispatching. The iterator is a safe guard against listeners that
// could mutate the list by calling the various add/remove methods. This prevents
// the array from being modified while we iterate it.
final CopyOnWriteArrayList<OnTouchModeChangeListener> listeners =
mOnTouchModeChangeListeners;
if (listeners != null) {
for (OnTouchModeChangeListener listener : listeners) {
listener.onTouchModeChanged(inTouchMode);
}
}
|
| final boolean | hasComputeInternalInsetsListeners()Returns whether there are listeners for computing internal insets.
final CopyOnWriteArrayList<OnComputeInternalInsetsListener> listeners =
mOnComputeInternalInsetsListeners;
return (listeners != null && listeners.size() > 0);
|
| public boolean | isAlive()Indicates whether this ViewTreeObserver is alive. When an observer is not alive,
any call to a method (except this one) will throw an exception.
If an application keeps a long-lived reference to this ViewTreeObserver, it should
always check for the result of this method before calling any other method.
return mAlive;
|
| private void | kill()Marks this ViewTreeObserver as not alive. After invoking this method, invoking
any other method but {@link #isAlive()} and {@link #kill()} will throw an Exception.
mAlive = false;
|
| void | merge(android.view.ViewTreeObserver observer)Merges all the listeners registered on the specified observer with the listeners
registered on this object. After this method is invoked, the specified observer
will return false in {@link #isAlive()} and should not be used anymore.
if (observer.mOnGlobalFocusListeners != null) {
if (mOnGlobalFocusListeners != null) {
mOnGlobalFocusListeners.addAll(observer.mOnGlobalFocusListeners);
} else {
mOnGlobalFocusListeners = observer.mOnGlobalFocusListeners;
}
}
if (observer.mOnGlobalLayoutListeners != null) {
if (mOnGlobalLayoutListeners != null) {
mOnGlobalLayoutListeners.addAll(observer.mOnGlobalLayoutListeners);
} else {
mOnGlobalLayoutListeners = observer.mOnGlobalLayoutListeners;
}
}
if (observer.mOnPreDrawListeners != null) {
if (mOnPreDrawListeners != null) {
mOnPreDrawListeners.addAll(observer.mOnPreDrawListeners);
} else {
mOnPreDrawListeners = observer.mOnPreDrawListeners;
}
}
if (observer.mOnTouchModeChangeListeners != null) {
if (mOnTouchModeChangeListeners != null) {
mOnTouchModeChangeListeners.addAll(observer.mOnTouchModeChangeListeners);
} else {
mOnTouchModeChangeListeners = observer.mOnTouchModeChangeListeners;
}
}
if (observer.mOnComputeInternalInsetsListeners != null) {
if (mOnComputeInternalInsetsListeners != null) {
mOnComputeInternalInsetsListeners.addAll(observer.mOnComputeInternalInsetsListeners);
} else {
mOnComputeInternalInsetsListeners = observer.mOnComputeInternalInsetsListeners;
}
}
observer.kill();
|
| public void | removeGlobalOnLayoutListener(android.view.ViewTreeObserver$OnGlobalLayoutListener victim)Remove a previously installed global layout callback
checkIsAlive();
if (mOnGlobalLayoutListeners == null) {
return;
}
mOnGlobalLayoutListeners.remove(victim);
|
| public void | removeOnComputeInternalInsetsListener(android.view.ViewTreeObserver$OnComputeInternalInsetsListener victim)Remove a previously installed internal insets computation callback
checkIsAlive();
if (mOnComputeInternalInsetsListeners == null) {
return;
}
mOnComputeInternalInsetsListeners.remove(victim);
|
| public void | removeOnGlobalFocusChangeListener(android.view.ViewTreeObserver$OnGlobalFocusChangeListener victim)Remove a previously installed focus change callback.
checkIsAlive();
if (mOnGlobalFocusListeners == null) {
return;
}
mOnGlobalFocusListeners.remove(victim);
|
| public void | removeOnPreDrawListener(android.view.ViewTreeObserver$OnPreDrawListener victim)Remove a previously installed pre-draw callback
checkIsAlive();
if (mOnPreDrawListeners == null) {
return;
}
mOnPreDrawListeners.remove(victim);
|
| public void | removeOnScrollChangedListener(android.view.ViewTreeObserver$OnScrollChangedListener victim)Remove a previously installed scroll-changed callback
checkIsAlive();
if (mOnScrollChangedListeners == null) {
return;
}
mOnScrollChangedListeners.remove(victim);
|
| public void | removeOnTouchModeChangeListener(android.view.ViewTreeObserver$OnTouchModeChangeListener victim)Remove a previously installed touch mode change callback
checkIsAlive();
if (mOnTouchModeChangeListeners == null) {
return;
}
mOnTouchModeChangeListeners.remove(victim);
|
