activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".MainActivity"
    android:background="@drawable/yy">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_weight="1.1"
        android:layout_height="match_parent">
        <EditText
            android:id="@+id/search_editText"
            android:inputType="text"
            android:maxLines="1"
            android:layout_weight="1"
            android:hint="@string/search"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>
        <Button
            android:id="@+id/search_buttons"
            android:text="@string/search"
            android:layout_weight="3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </LinearLayout>
    <ScrollView
        android:id="@+id/play_list_scroll"
        android:layout_weight="0.3"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <LinearLayout
            android:id="@+id/play_list"
            android:orientation="vertical"
            android:visibility="visible"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </ScrollView>

    <ScrollView
        android:id="@+id/search_result_scroll"
        android:layout_weight="0.3"
        android:visibility="gone"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <LinearLayout
            android:id="@+id/search_result"
            android:orientation="vertical"
            android:visibility="visible"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </ScrollView>

    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_weight="1"
        android:layout_height="match_parent">
        <TextView
            android:id="@+id/nowMusic"
            android:layout_width="match_parent"
            android:maxLines="1"
            android:layout_margin="5dp"
            android:text="当前播放："
            android:layout_height="wrap_content">

        </TextView>
        <SeekBar
            android:id="@+id/seekbar"
            android:layout_weight="1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:orientation="horizontal"
            android:layout_weight="0.6"

            android:layout_height="match_parent">
            <Button
                android:id="@+id/preMusic"
                android:text="上一首"
                android:layout_margin="5dp"
                android:layout_weight="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"/>
            <Button
                android:id="@+id/playlist"
                android:text="播放队列"
                android:textSize="10sp"
                android:layout_margin="5dp"
                android:layout_weight="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"/>

            <Button
                android:id="@+id/playMusic"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_margin="5dp"
                android:layout_weight="3"
                android:text="播放音乐"
                android:textSize="12sp" />
            <Button
                android:id="@+id/nextMusic"
                android:text="下一首"
                android:layout_margin="5dp"
                android:layout_weight="3"
                android:layout_width="match_parent"
                android:layout_height="match_parent"/>
        </LinearLayout>
    </LinearLayout>




</LinearLayout>