视图体系

/**
 * The top of a view hierarchy, implementing the needed protocol between View
 * and the WindowManager.  This is for the most part an internal implementation
 * detail of {@link WindowManagerGlobal}.
 *
 * {@hide}
 */

 

public final class ViewRootImpl implements ViewParent,
        View.AttachInfo.Callbacks, HardwareRenderer.HardwareDrawCallbacks

 

 

/**
 * Defines the responsibilities for a class that will be a parent of a View.
 * This is the API that a view sees when it wants to interact with its parent.
 *
 */

 

ViewParent

/** Interface to let you add and remove child views to an Activity. To get an instance
  * of this class, call {@link android.content.Context#getSystemService(java.lang.String) Context.getSystemService()}.
  */

 

public interface ViewManager

 

/**
 * <p>
 * A </code> is a special view that can contain other views
 * (called children.) The view group is the base class for layouts and views
 * containers. This class also defines the
 * {@link android.view.ViewGroup.LayoutParams} class which serves as the base
 * class for layouts parameters.
 * </p>

 

public abstract class ViewGroup extends View implements ViewParent, ViewManager

 

public class View implements Drawable.Callback, KeyEvent.Callback,
        AccessibilityEventSource