FrameLayout Shown Above AppBarLayout

问题

I have a simple CoordinatorLayout with a AppBarLayout and FrameLayout, but the FrameLayout contents are being displayed over the AppBarLayout regardless of the layout_behavior attribute on the FrameLayout. I've tried adding that attribute elsewhere (like on my RecyclerView), but it's the same behavior.

Here's a picture to show what I mean.

Activitiy Layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay"
            app:layout_scrollFlags="scroll|enterAlways"/>

    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        android:id="@android:id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

</android.support.design.widget.CoordinatorLayout>

Fragment Layout:

<android.support.v7.widget.RecyclerView
android:id="@+id/checkins_recycler_view"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

How I add my fragment in my Activity:

final UserCheckinsFragment fragment = new UserCheckinsFragment();
    final Bundle arguments = new Bundle();
    UserCheckinsFragment.getArguments(arguments, items);
    fragment.setArguments(arguments);

    getSupportFragmentManager().beginTransaction().add(android.R.id.content, fragment,
            UserCheckinsFragment.class.getName()).commit();

回答1:

The FrameLayout ID (@android:id/content) in the xml and the container (android.R.id.content) in the Fragment transaction refer to the system root of layout, then it is laid over the all screen.

To solve, use them without android prefix.

回答2:

add app:layout_behavior="@string/appbar_scrolling_view_behavior" to the RecyclerView and it will work. The app:layout_behavior should be to the root of the layout's of your Fragment

回答3:

https://stackoverflow.com/a/24713989/4409113

In AppCompat, there is no native support for ActionBar. android.R.id.content is the container of entire app screen. This means - including ActionBar, because ActionBar is emulated there and added as a standard view hierarchy.

You may want to use(In the Layout):

android:id="@+id/content"

And(in Java):

getSupportFragmentManager().beginTransaction().add(R.id.content, fragment,
                UserCheckinsFragment.class.getName()).commit();

Then, it should work.

回答4:

Hi i had the same problem and i fixed it by adding"app:layout_behavior="@string/appbar_scrolling_view_behavior"‌" into my layout parent which is linear layout and contain the RecylerView Layout and now it works correctly but i have an other problem that the button which is in the boutmn of the page disapear

来源：https://stackoverflow.com/questions/35162465/framelayout-shown-above-appbarlayout