如何删除CoordiantorLayout中的recyclerView下面的空白区域

Question

朋友。好几天我一直在解决这个问题 - 如何去除屏幕底部的空白区域。工具栏是在片段中创建的，由于未知原因，RecyclerView会在底部留下空白区域，如工具栏大小。请帮帮我。

`

<android.support.design.widget.AppBarLayout
    android:id="@+id/main.appbar"
    android:layout_width="match_parent"
    android:layout_height="600dp"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    android:background="@color/grey"
    android:fitsSystemWindows="true"
    android:elevation="5dp">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/main.collapsing"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:contentScrim="@color/bir"
        app:expandedTitleMarginStart="48dp"
        app:expandedTitleMarginEnd="64dp"
        android:fitsSystemWindows="true">

        <SurfaceView
            android:id="@+id/main.surface"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax"
            />


            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

            <ImageView
                android:id="@+id/icon"
                android:layout_width="150dp"
                android:layout_height="150dp"
                android:src="@drawable/ic_launcher"
                android:layout_marginLeft="20dp"
                android:layout_marginTop="20dp" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:id="@+id/textView3"
                    android:text="@string/app_name"
                    android:textColor="@color/red"
                    android:textSize="80dp"
                    android:layout_centerVertical="true"
                    android:layout_alignParentLeft="true"
                    android:layout_alignParentStart="true"
                    android:layout_marginLeft="20dp"
                    android:typeface="serif" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:text="Stream &apos;em All!"
                    android:id="@+id/textView4"
                    android:textColor="@color/red"
                    android:textSize="50dp"
                    android:layout_alignParentBottom="true"
                    android:layout_alignParentRight="true"
                    android:layout_alignParentEnd="true"
                    android:layout_marginRight="67dp"
                    android:layout_marginEnd="67dp"
                    android:layout_marginBottom="91dp"
                    android:typeface="serif" />
            </RelativeLayout>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            android:elevation="5dp" />
    </android.support.design.widget.CollapsingToolbarLayout>



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

    <android.support.v7.widget.RecyclerView
        android:id="@+id/stream_list"
        android:layout_width="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_height="match_parent"/>

<android.support.design.widget.FloatingActionButton
    android:layout_height="80dp"
    android:layout_width="80dp"
    android:layout_margin="@dimen/activity_horizontal_margin"
    android:src="@drawable/ic_float"
    app:layout_anchor="@id/main.appbar"
    app:layout_anchorGravity="bottom|right|end"
    app:layout_behavior="com.example.shpp.videoapp.Utils.FABBehavior"
    android:id="@+id/start_button"
    android:elevation="5dp"/>

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    if (mView != null)
        return mView;
    mView = inflater.inflate(R.layout.welcome_fragment, null);
    findViews();
    return mView;
}

private void findViews() {
    mRecyclerView = (RecyclerView) mView.findViewById(R.id.stream_list);
    mSurface = (SurfaceView) mView.findViewById(R.id.main_surface);
    mFloatButton = (FloatingActionButton) mView.findViewById(R.id.start_button);
    mAppBarLayout = (AppBarLayout) mView.findViewById(R.id.main_appbar);
}

private void initViews() {
    mFloatButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            NotificationCenter.getInstance().generateEvent(Event.GO_TO_STREAM, null);
        }
    });

    LinearLayoutManager llm = new LinearLayoutManager(this.getContext());
    StreamListDataProvider mStreamListDataProvider = new StreamListDataProvider(this.getContext());
    StreamListAdapter mArapter = new StreamListAdapter(this.getContext(), mStreamListDataProvider);
    mRecyclerView.setLayoutManager(llm);
    mRecyclerView.setAdapter(mArapter);
    mRecyclerView.setHasFixedSize(true);

    SurfaceHolder mSurfaceHolder = mSurface.getHolder();
    HolderCallback holderCallback = new HolderCallback();
    mSurfaceHolder.addCallback(holderCallback);
    mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}


@Override
public void onResume() {
    super.onResume();
    mAppBarLayout.setExpanded(false);
    initViews();
    mCamera = Camera.open(ZERO);
}

@Override
public void onPause() {
    super.onPause();
    mCamera.stopPreview();
    mCamera.release();
}

@Override
public void onStop() {
    super.onStop();
}`