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Android Studio 无法为 ImageView 找到可绘制资源

[英]Android Studio not able to find drawable resource for ImageView

原文 2017-12-07 07:16:01 5 2 android/ android-constraintlayout/ android-studio-3.0/ android-designer

I am using Android Studio 3.0.1, I have a simple xml file with root ConstraintLayout , so when I do preview and drag and drop an ImageView from the Preview Palette , it is not able to find the new added png file, which I have copy/paste directly in the project directory, not in Android Studio.我使用的是 Android Studio 3.0.1，我有一个带有根ConstraintLayout的简单 xml 文件，所以当我从Preview Palette进行预览和drag and drop ImageView ，它无法找到新添加的 png 文件，我有直接在项目目录中复制/粘贴，而不是在Android Studio.

I have tried clean, rebuild but it is still not able to find the image.我尝试过清理，重建，但仍然无法找到图像。

I know that it will work if I restart it but I think that it is not a good idea to restart each and every time I add a new png file.我知道如果我restart它会起作用，但我认为每次添加新的 png 文件时都restart不是一个好主意。

Is this a bug in Android Studio ?这是Android Studio的错误吗？

Have anyone else experienced this?有没有其他人经历过这种情况？

2 个解决方案

File - Sync with file system may help.文件 - 与文件系统同步可能会有所帮助。 Looking at your file names above, they should be ok as I hit the same problem due to using an upper case char at the start of the filename.查看上面的文件名，它们应该没问题，因为我遇到了同样的问题，因为在文件名的开头使用了大写字符。

By building the project, I was alerted to this by the following error: "H is not a valid file-based resource name character: File-based resource names must contain only lowercase az, 0-9, or underscore"通过构建项目，我收到以下错误警告：“H 不是基于文件的有效资源名称字符：基于文件的资源名称必须仅包含小写字母 az、0-9 或下划线”

Drawable folder host images, so try putting your images in this folder when using imageView. Drawable 文件夹托管图像，因此在使用 imageView 时尝试将图像放在此文件夹中。

A workaround for images organization (since the project's folder structure should prevail flat) is using underscore rather that forward dash.图像组织的一种解决方法（因为项目的文件夹结构应该是扁平的）是使用下划线而不是向前破折号。