以编程方式设置图像视图的匹配父级高度

我需要设置一个 图像视图的高度作为 匹配的父母编程。如果它是一个固定的高度，我知道如何设置。

但是我怎么才能把它设置为匹配的父母呢？

编辑:

实际上父布局的高度是动态的。所以我需要把图像视图的高度作为父布局的高度。

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小开

imageView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

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You can use the MATCH_PARENT constant or its numeric value -1.

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imageView.setLayoutParams
(new ViewGroup.MarginLayoutParams
(width, ViewGroup.LayoutParams.MATCH_PARENT));

The Type of layout params depends on the parent view group. If you put the wrong one it will cause exception.

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最佳答案

initiate LayoutParams .

assign the parent's width and height and pass it to setLayoutParams method of the imageview

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You can try this incase you would like to match parent. The dimensions arrangement is width and height inorder

web = new WebView(this);
web.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

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imageView.getLayoutParams().height= ViewGroup.LayoutParams.MATCH_PARENT;

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For Kotlin Users

val params = mImageView?.layoutParams as FrameLayout.LayoutParams
params.width = FrameLayout.LayoutParams.MATCH_PARENT
params.height = FrameLayout.LayoutParams.MATCH_PARENT
mImageView?.layoutParams = params

Here I used FrameLayout.LayoutParams since my views( ImageView) parent is FrameLayout

小开

I had same issue. Resolved by firstly setting :

imageView.setMinHeight(0);
imageView.setMinimumHeight(0);

And then :

imageView.getLayoutParams().height= ViewGroup.LayoutParams.MATCH_PARENT;

setMinHeight is defined by ImageView, while setMinimumHeight is defined by View. According to the docs, the greater of the two values is used, so both must be set.