身高和视图imageview的螺丝了setimagebitmap后 [英] Height and view of imageview screws up after setimagebitmap

问题描述

下面是我的XML：

<LinearLayout
android:id="@+id/afterphotolayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

    <ImageView
        android:id="@+id/imgPreview"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:maxHeight="400dp"
        android:contentDescription="@string/image_description"
        android:scaleType="centerCrop" />

    <ImageView
        android:id="@+id/blankView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />
</LinearLayout>

但在code，当我这样做：

But In the code, when I do this:

_imgPreview.setImageBitmap(_compressedBitmap);
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 0, 1.0f );
_imgPreview.setLayoutParams(param);

我的形象依然没有调整由中心作物占用屏幕的高度和规模的一半。看来，setImageBitmap功能螺丝钉起来的ImageView的高度/宽度，不允许它即使我尝试设置一个新的布局参数进行更改。任何人都可以提供一些线索为什么会这样？

My image is still not resized to take up half the screen height and scale by center crop. It seems that the setImageBitmap function screws up the height/width of the imageview and doesn't allow it to be changed even after I try to set a new layout param. Can anyone shed some light on why this is so?

推荐答案

我有同样的问题！快要疯了，setImageBitmap完全忽略布局权重。我还添加重量​​的设置编程：

I had the same issue! Was going crazy, setImageBitmap completely ignores the layout weight. I also added the setting of the weight programmatically:

barcode.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 0, 2));

但没有帮助。
但后来我这样做：

but did not help. But then I did this:

barcode.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1, 2));

和，帮助，不给对高度的0值。我只是想这一点上棒棒糖，所以旧版本没有测试过，但是很可能会工作。
Frustating，我花了好久再找出一些解决方法一个Android怪癖

and that helped, not giving a '0' value for the height. I just tried this out on lollipop, so haven't tested in on older version, but will probably work. Frustating, took me too long again to figure out some workaround for an Android quirk

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