Android imageview 不尊重 maxWidth？
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Android imageview not respecting maxWidth?
提问by juell
So, I have an imageview that should display an arbitrary image, a profile picture downloaded from the internet. I want this the ImageView to scale its image to fit inside the height of the parent container, and a set max width of 60dip. However, if the image is tall ratio-wise, and doesn't need the full 60dip of width, the ImageView's width should decrease so the view's background fits snugly around the image.
所以，我有一个图像视图，它应该显示一个任意图像，一个从互联网下载的个人资料图片。我希望这个 ImageView 缩放它的图像以适应父容器的高度，并且设置的最大宽度为 60dip。但是，如果图像在比例方面很高，并且不需要完整的 60dip 宽度，则 ImageView 的宽度应该减小，以便视图的背景紧贴图像周围。
I tried this,
我试过这个，
<ImageView android:id="@+id/menu_profile_picture"
android:layout_width="wrap_content"
android:maxWidth="60dip"
android:layout_height="fill_parent"
android:layout_marginLeft="2dip"
android:padding="4dip"
android:scaleType="centerInside"
android:background="@drawable/menubar_button"
android:layout_centerVertical="true"/>
but that made the ImageView super large for some reason, maybe it used the intrinsic width of the image and wrap_content to set it - anyway, it didn't respect my maxWidth attribute.. Does that only work inside some types of containers? It's in a LinearLayout...
但这使 ImageView 由于某种原因变得非常大，也许它使用了图像的固有宽度和 wrap_content 来设置它 - 无论如何，它不尊重我的 maxWidth 属性..这仅在某些类型的容器内有效吗？它在一个 LinearLayout 中......
Any suggestions?
有什么建议？
回答by juell
Ah,
啊，
android:adjustViewBounds="true"
is required for maxWidth to work.
需要 maxWidth 才能工作。
Works now!
现在工作！
回答by FeelGood
Setting adjustViewBoundsdoes not help if you use match_parent, but workaround is simple custom ImageView:
adjustViewBounds如果您使用match_parent，设置无济于事，但解决方法是简单的自定义ImageView：
public class LimitedWidthImageView extends ImageView {
public LimitedWidthImageView(Context context) {
super(context);
}
public LimitedWidthImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public LimitedWidthImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int specWidth = MeasureSpec.getSize(widthMeasureSpec);
int maxWidth = getMaxWidth();
if (specWidth > maxWidth) {
widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth,
MeasureSpec.getMode(widthMeasureSpec));
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
