Android ImageView，adjustViewBounds 在 Android 4.1 中不起作用

Question

在我的实现中，adjustViewBounds=true 在 android 5.1 中完全符合预期 但在 4.1 中不做同样的事情

4.1 on left, 5.1 on right

adjustViewBounds=true

adjustViewBounds=false

MainFragment

<GridView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:columnWidth="150dp"
    android:numColumns="auto_fit"
    android:verticalSpacing="0dp"
    android:horizontalSpacing="0dp"
    android:stretchMode="columnWidth"
    tools:context=".MainFragment"
    android:id="@+id/movie_gridView">
</GridView>

ImageView

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:id="@+id/gridView_moviePoster"
        android:adjustViewBounds="true"/>
</FrameLayout>

Answer 1

If the application targets API level 17 or lower, adjustViewBounds will allow the drawable to shrink the view bounds, but not grow to fill available measured space in all cases. This is for compatibility with legacy MeasureSpec and RelativeLayout behavior.

所以在 Api 级别 17 及以下你必须使用 AdjustableImageView

在gradle下面添加

compile 'com.inthecheesefactory.thecheeselibrary:adjustable-imageview:1.0.0'

详细教程See this