android 设立View

android 设置View
回去window属性
WindowManager.LayoutParams l = r.window.getAttributes();

Decor 为PhoneWindow.DecorView  这个View其实是一个Activity 的最底层View
wm.addView(decor, l);


调用PhoneWindow的LocalWindowManager 中的addView

        public final void addView(View view, ViewGroup.LayoutParams params) {            // Let this throw an exception on a bad params.            WindowManager.LayoutParams wp = (WindowManager.LayoutParams)params;            CharSequence curTitle = wp.getTitle();            if (wp.type >= WindowManager.LayoutParams.FIRST_SUB_WINDOW &&                wp.type <= WindowManager.LayoutParams.LAST_SUB_WINDOW) {                if (wp.token == null) {                    View decor = peekDecorView();                    if (decor != null) {                        wp.token = decor.getWindowToken();                    }                }                if (curTitle == null || curTitle.length() == 0) {                    String title;                    if (wp.type == WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA) {                        title="Media";                    } else if (wp.type == WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY) {                        title="MediaOvr";                    } else if (wp.type == WindowManager.LayoutParams.TYPE_APPLICATION_PANEL) {                        title="Panel";                    } else if (wp.type == WindowManager.LayoutParams.TYPE_APPLICATION_SUB_PANEL) {                        title="SubPanel";                    } else if (wp.type == WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG) {                        title="AtchDlg";                    } else {                        title=Integer.toString(wp.type);                    }                    if (mAppName != null) {                        title += ":" + mAppName;                    }                    wp.setTitle(title);                }            } else {                if (wp.token == null) {                    wp.token = mContainer == null ? mAppToken : mContainer.mAppToken;                }                if ((curTitle == null || curTitle.length() == 0)                        && mAppName != null) {                    wp.setTitle(mAppName);                }           }            if (wp.packageName == null) {                wp.packageName = mContext.getPackageName();            }            mWindowManager.addView(view, params);        }

调用 WindowManagerImpl 的addView
进一步调用如下方法：

final WindowManager.LayoutParams wparams                = (WindowManager.LayoutParams)params;root.setView(view, wparams, panelParentView);

ViewRoot里面也有一个Window  Attribute变量mWindowAttributes  ---Window
attrs 为Window的Attribute  mWindowAttributes.copyFrom(attrs);--ViewRoot
这是两个不同的对象，有时间内容相同。 具体看代码。