018-AlbumDetailSubscriptionButton.md

#018: 添加订阅按钮

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##1. 创建一个drawable文件作为订阅按钮的背景 shape_album_subscribe_bg.xml:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">

    <solid android:color="@color/subscribe_color"/>
    <corners android:radius="30dp"/>
    <size android:width="150dp" android:height="60dp"/>
</shape>

##2. 添加一个文本控件到布局文件 activity_album_detail.xml:

<TextView
    android:id="@+id/tv_subscribe"
    android:layout_width="75dp"
    android:layout_height="33dp"
    android:text="@string/album_subscribe"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_marginEnd="28dp"
    android:gravity="center"
    android:textColor="@color/white"
    android:background="@drawable/shape_album_subscribe_bg"
    app:layout_constraintTop_toBottomOf="@id/iv_album_large_cover"
    tools:layout_editor_absoluteX="195dp"
    tools:layout_editor_absoluteY="498dp" />

##3. 效果图