下面列出了android.view.ViewTreeObserver.OnGlobalLayoutListener#onGlobalLayout ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Inflates the view, which is used to visualize a specific item.
*
* @param item
* The item, whose view should be inflated, as an instance of the class {@link
* AbstractItem}. The item may not be null
* @param listener
* The layout listener, which should be notified, when the view has been inflated, as an
* instance of the type {@link OnGlobalLayoutListener} or null, if no listener should be
* notified
* @param params
* An array, which contains optional parameters, which should be passed to the view
* recycler, which is used to inflate the view, as an {@link Integer} array or null, if
* no optional parameters should be used
*/
protected final void inflateView(@NonNull final AbstractItem item,
@Nullable final OnGlobalLayoutListener listener,
@NonNull final Integer... params) {
Pair<View, Boolean> pair = getTabViewRecycler().inflate(item, params);
if (listener != null) {
boolean inflated = pair.second;
if (inflated) {
View view = pair.first;
view.getViewTreeObserver()
.addOnGlobalLayoutListener(new LayoutListenerWrapper(view, listener));
} else {
listener.onGlobalLayout();
}
}
}
/**
* Inflates the content, which is associated with a specific tab.
*
* @param tab
* The tab, whose content should be inflated, as an instance of the class {@link Tab}.
* The tab may not be null
* @param listener
* The layout listener, which should be notified, when the view has been inflated, as an
* instance of the type {@link OnGlobalLayoutListener} or null, if no listener should be
* notified
*/
private void inflateContent(@NonNull final Tab tab,
@Nullable final OnGlobalLayoutListener listener) {
Pair<View, Boolean> pair = contentViewRecycler.inflate(tab);
View view = pair.first;
if (listener != null) {
boolean inflated = pair.second;
if (inflated) {
view.getViewTreeObserver()
.addOnGlobalLayoutListener(new LayoutListenerWrapper(view, listener));
} else {
listener.onGlobalLayout();
}
}
}
/**
* Creates and returns a layout listener, which allows to adapt the size and position of an
* item, once its view has been inflated.
*
* @param item
* The item, whose view should be adapted, as an instance of the class {@link
* AbstractItem}. The item may not be null
* @param dragging
* True, if the item is currently being dragged, false otherwise
* @param layoutListener
* The layout lister, which should be notified, when the created listener is invoked, as
* an instance of the type {@link OnGlobalLayoutListener} or null, if no listener should
* be notified
* @return The layout listener, which has been created, as an instance of the type {@link
* OnGlobalLayoutListener}. The layout listener may not be null
*/
@NonNull
private OnGlobalLayoutListener createInflateViewLayoutListener(@NonNull final AbstractItem item,
final boolean dragging,
@Nullable final OnGlobalLayoutListener layoutListener) {
return new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
updateView(item, dragging);
if (layoutListener != null) {
layoutListener.onGlobalLayout();
}
}
};
}
/**
* Creates and returns a layout listener, which allows to adapt the size and position of a tab,
* once its view has been inflated.
*
* @param item
* The item, which corresponds to the tab, whose view should be adapted, as an instance
* of the class {@link AbstractItem}. The item may not be null
* @param dragging
* True, if the item is currently being dragged, false otherwise
* @param layoutListener
* The layout lister, which should be notified, when the created listener is invoked, as
* an instance of the type {@link OnGlobalLayoutListener} or null, if no listener should
* be notified
* @return The layout listener, which has been created, as an instance of the type {@link
* OnGlobalLayoutListener}. The layout listener may not be null
*/
@NonNull
private OnGlobalLayoutListener createInflateViewLayoutListener(@NonNull final AbstractItem item,
final boolean dragging,
@Nullable final OnGlobalLayoutListener layoutListener) {
return new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
adaptViewSize(item);
updateView(item, dragging);
if (layoutListener != null) {
layoutListener.onGlobalLayout();
}
}
};
}