ImageView在布局中显示但不在实际设备上显示 [英] ImageView displaying in layout but not on actual device

问题描述

我想要显示一个与设备的整个宽度匹配的ImageView，我意识到这样：

I have an ImageView that I want to display matching the full width of the device, I realized that like this:

<ImageView
    android:id="@+id/home_bar_newvault"
    android:layout_width="wrap_content"
    android:layout_height="40dp"
    android:scaleType="centerCrop"
    android:layout_alignParentBottom="true"
    android:src="@drawable/home_bar" />

home_bar是一个PNG图像文件，其大小如下：2399x254。当我选择查看UI的图形布局时，它会在活动的底部正确显示图像视图。但是，当我在我的设备上启动应用程序时，它根本不会显示Imageview。

The home_bar is a PNG image file with the following dimensions: 2399x254. When I choose to view the Graphical Layout of the UI it displays the imageview correctly at the bottom of the activity. However, when I start the application on my device it won't display the Imageview at all.

推荐答案

好吧我试过改变图像的分辨率（将其切成两半使其成为1000x130），并以某种方式修复问题。我认为Android无法直接呈现这样的大图像？我不知道，如果您对该主题有更多了解，请不要犹豫回复！无论如何，缩小图像是有效的。

Alright I've tried changing the resolution of the image (cutting it in half making it 1000x130), and somehow that fixed the problem. I think Android can't render large images like that directly? I don't know, if you know more about the subject please don't hesitate to reply! Anyway, scaling down the image worked.

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