在我自己挣扎了一段时间之后，这是解决方案（经过测试 - 效果很好）：
一般步骤是：
- 创建包装视图
- 分离屏幕视图子项、放置包装器并附加子项
- 向孩子们夸大内容
- 控制包装器将帮助您完全控制操作栏及其下方的内容。
- 现在，您可以使用包装器将“兄弟”添加到操作栏/主区域。那位兄弟正是您在图片中所描述的。
让我们看一些代码。
首先，创建一个方法来帮助创建包装视图。包装器将放置在整个屏幕和应用内容之间。作为ViewGroup，您以后可以完全控制它的内容。
private ViewGroup setContentViewWithWrapper(int resContent) {
ViewGroup decorView = (ViewGroup) this.getWindow().getDecorView();
ViewGroup decorChild = (ViewGroup) decorView.getChildAt(0);
// Removing decorChild, we'll add it back soon
decorView.removeAllViews();
ViewGroup wrapperView = new FrameLayout(this);
// You should set some ID, if you'll want to reference this wrapper in that manner later
//
// The ID, such as "R.id.ACTIVITY_LAYOUT_WRAPPER" can be set at a resource file, such as:
// <resources xmlns:android="http://schemas.android.com/apk/res/android">
// <item type="id" name="ACTIVITY_LAYOUT_WRAPPER"/>
// </resources>
//
wrapperView.setId(R.id.ACTIVITY_LAYOUT_WRAPPER);
// Now we are rebuilding the DecorView, but this time we
// have our wrapper view to stand between the real content and the decor
decorView.addView(wrapperView, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
wrapperView.addView(decorChild, decorChild.getLayoutParams());
LayoutInflater.from(this).inflate(getActivityLayout(),
(ViewGroup)((LinearLayout)wrapperView.getChildAt(0)).getChildAt(1), true);
return wrapperView;
}
现在，干扰常规的Activity 创建，而不是使用setContentView，而是使用我们创建的方法。
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// DON'T CALL `setContentView`,
// we are replacing that line with this code:
ViewGroup wrapperView = setContentViewWithWrapper(R.layout.activity_layout);
// Now, because the wrapper view contains the entire screen (including the notification bar
// which is above the ActionBar) I think you'll find it useful to know the exact Y where the
// action bar is located.
// You can use something like that:
ViewGroup actionBar = (ViewGroup)((LinearLayout)wrapperView.getChildAt(0)).getChildAt(0);
int topOffset = actionBar.getTop();
// Now, if you'll want to add a view:
// 1. Create new view
// 2. Set padding top - use "topOffset"
// 3. Add the view to "wrapperView"
// 4. The view should be set at front. if not - try calling to "bringToFront()"
}
就是这样。
注意事项
编辑：请参阅@CristopherOyarzúnAltamirano 回答以获得对较新 Android 版本的进一步支持
祝你好运！