pda/zhuike/src/main/res/layout/content_book.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".BookActivity"
    tools:showIn="@layout/activity_book"
    android:layout_weight="1"
    android:layout_marginBottom="3dp"
    >
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal"
        android:layout_weight="0"
        android:layout_gravity="bottom"
        >
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>
       <Button
           android:text="推荐"
           android:layout_width="wrap_content"
           android:layout_height="match_parent"
           android:drawableLeft="@drawable/ic_mood_black_24dp"
           android:layout_weight="0"
           android:background="@drawable/item_selector"
           android:paddingLeft="5dp"

           />

        <Button
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp"
            android:text="分享"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:drawableLeft="@drawable/ic_toys_black_24dp"
            android:layout_weight="0"
            android:background="@drawable/item_selector"
            android:paddingLeft="5dp"
            />

        <Button
            android:text="报错"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:drawableLeft="@drawable/ic_sentiment_very_satisfied_black_24dp"
            android:layout_weight="0"
            android:background="@drawable/item_selector"
            android:paddingLeft="5dp"
            />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>


    </LinearLayout>





    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="@dimen/text_margin"
        android:text="@string/large_text" />



</LinearLayout>


</android.support.v4.widget.NestedScrollView>
<!--
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        tools:context=".BookActivity"
        tools:showIn="@layout/activity_book"
        android:layout_weight="1"
        >

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="@dimen/text_margin"
            android:text="@string/large_text" />

    </android.support.v4.widget.NestedScrollView>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal"
        android:layout_weight="0"
        >
        <ImageButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_sentiment_very_satisfied_black_24dp"
            android:layout_weight="1"
            />
        <ImageButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_toys_black_24dp"
            android:layout_weight="1"
            />
        <ImageButton
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:src="@drawable/ic_mood_black_24dp"
            android:layout_weight="1"
            />

    </LinearLayout>

</LinearLayout>
-->