应用栏布局不起作用

Question

我正在努力实现这一目标。

这是我到目前为止所取得的成就。

    <?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:id="@+id/cor_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="256dp">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsingToolbarLayout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <android.support.v7.widget.Toolbar
                android:id="@+id/app_bar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/primaryColor"
                android:minHeight="?attr/actionBarSize"
                android:popupTheme="@style/ThemeOverlay.AppCompat.Dark"
                android:theme="@style/MyCustomToolbarTheme"
                app:layout_collapseMode="pin" />
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>

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

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="16dp"
        android:layout_marginBottom="16dp"
        android:layout_marginEnd="16dp"
        android:layout_marginRight="16dp"
        android:elevation="6dp"
        android:src="@drawable/ic_add_white_24dp"
        app:borderWidth="0dp"
        app:fabSize="normal"
        app:pressedTranslationZ="12dp"
        app:rippleColor="?attr/colorControlHighlight" />

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

问题是无论我向回收站视图添加多少项目，应用栏布局都不会滚动，它只是停留 pinned.I 知道图像尚未添加，但这对 now.Could 有人告诉我这里缺少什么以及为什么它不滚动？

Answer 1

看看这个：

<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.support.design.widget.AppBarLayout
        android:id="@+id/appBar"
        android:layout_width="match_parent"
        android:layout_height="192dp"
        android:fitsSystemWindows="true">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapseToolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:contentScrim="?attr/colorPrimary"
            app:expandedTitleMarginEnd="80dp"
            app:expandedTitleMarginStart="30dp"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:title="Custom Layout">

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:fitsSystemWindows="true"
                android:scaleType="fitXY"
                android:src="@drawable/bridge"
                app:layout_collapseMode="pin"
                app:layout_collapseParallaxMultiplier="1.5"/>


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

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

    </android.support.design.widget.AppBarLayout>
    <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:backgroundTint="@android:color/holo_blue_dark"
        app:elevation="10dp"
        android:translationZ="10dp"
        android:layout_marginRight="20dp"
        app:layout_anchor="@+id/appBar"
        app:layout_anchorGravity="bottom|right|end"
        app:borderWidth="0dp"
        android:visibility="gone"
        android:src="@drawable/plus" />
    <android.support.v7.widget.RecyclerView
        android:id="@+id/uid"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>

在你的activity中：

Toolbar toolbar;
    FloatingActionButton floatingActionButton;
    CollapsingToolbarLayout collapse;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        toolbar= (Toolbar) findViewById(R.id.toolbar);
        floatingActionButton=(FloatingActionButton) findViewById(R.id.fab);
        collapse=(CollapsingToolbarLayout) findViewById(R.id.collapseToolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        collapse.setTitle("Title");
        collapse.setCollapsedTitleTextColor(Color.parseColor("#FFFFFF"));
        collapse.setExpandedTitleColor(Color.parseColor("#FFFFFF"));
        collapse.setStatusBarScrimColor(Color.parseColor("#FFFFFF"));

应用栏布局不起作用

App Bar Layout Not Working

android

toolbar