如何在android中使linearLayout部分透明? [英] How to make a linearLayout partially transparent in android?

问题描述

我有一个包含2个LinearLayouts的RelativeLayout，其中一个部分覆盖了另一个.我想使顶部的LinearLayout部分透明，因此我也可以看到第二个LinearLayout ，因为我知道有2个图像作为2个LinearLayouts 的背景.

I have a RelativeLayout containing 2 LinearLayouts one of them is partially covering the other. I want to make the part of the LinearLayout on top transparent so I can also see the 2nd LinearLayout knowing that i have 2 images as background for the 2 LinearLayouts.

推荐答案

设置颜色后，它就像 ARGB(Alpha Red Green Blue).您需要 更改颜色代码中的字母以增加或减少透明度 :

When we set the color it is like ARGB(Alpha Red Green Blue). You need to change the alpha in the color code to increase or decrease the amount of Transparency :

您可以将其设置为00到FF(十六进制十进制)

为获得最大透明度=> #00555555(此处 00 表示Alpha)

For maximum transparency => #00555555 (Here 00 stands for the alpha)

对于最低透明度或无透明度=> #FF555555(此处 FF 表示Alpha)

For minimum or no transparency => #FF555555 (Here FF stands for the alpha)

因此，用于设置 ImageView的透明度，您可以这样编写代码:

So, for setting the transparency of an ImageView you can code like this:

ImageView image = (ImageView) findViewById(R.id.myImage);
image.setAlpha(0.3);

此外，您可以像这样为 LinearLayout 设置Alpha :

Also, you can set the alpha for your LinearLayout like this :

LinearLayout ll = (LinearLayout) findViewById(R.id.linearlayout);
ll.setAlpha(0.4);

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