【Android】ImageView 圖片顯示寬度佔滿全屏 (adjustViewBounds)

ImageView 有 android:adjustViewBounds 這個屬性，原文檔說明為

Set this to true if you want the ImageView to adjust its bounds to preserve the aspect ratio of its drawable. [boolean]

 

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true"
        android:background="#666666"
        android:src="@drawable/ic_launcher" />