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。