Java 媒体播放器在 R.raw 上失败 - Android
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/18134346/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
mediaplayer failing on R.raw - Android
提问by epsilones
Importing import android.media.MediaPlayer, I am told raw cannot be resolvedin
导入import android.media.MediaPlayer，有人告诉我raw cannot be resolved在
private void playSound(){
MediaPlayer mp = MediaPlayer.create(this, R.raw.Jam);
...
I am really new to Android, what is rawfor ? and how can I fix this problem ?
我真的很新Android，是raw为了什么？我该如何解决这个问题？
采纳答案by William Morrison
A raw folder holds files of any type. You need a rawfolder under your resources folder (res). In your example, jamis expected as a resource in the rawfolder, and will likely be a type of music file as you're using MediaPlayerto try and read it.
原始文件夹包含任何类型的文件。您raw的资源文件夹 ( res)下需要一个文件夹。在您的示例中，jam应作为raw文件夹中的资源，并且可能是您MediaPlayer用来尝试阅读的一种音乐文件。
You've this error raw cannot be resolvedbecause raw folder doesn't exist, and so the variable rawin class Ris not being auto-generated.
您遇到此错误raw cannot be resolved是因为原始文件夹不存在，因此raw类中的变量R不是自动生成的。
Fix the problem by creating the rawfolder.
通过创建raw文件夹来解决问题。
If you already have created res/rawtry cleaning the project. Sometimes Eclipse gets confused. If that doesn't work, make a small change to a source file, and save it so the auto-build process kicks off. Sometimes cleaning manually hasn't fixed the problem for me, its a known bug for Eclipse.
如果您已经创建，请res/raw尝试清理项目。有时 Eclipse 会感到困惑。如果这不起作用，请对源文件进行小的更改，然后保存它，以便自动构建过程开始。有时手动清理并没有解决我的问题，它是 Eclipse 的一个已知错误。
回答by Philipp Jahoda
"raw" is a (or should be) a folder in your Android Project, containing the file "Jam" in your case. ("Jam" will most likely be a .wav or .mp3 file)
“raw” 是（或应该是）Android 项目中的一个文件夹，在您的案例中包含文件“Jam”。（“果酱”很可能是 .wav 或 .mp3 文件）
Since "raw" cannot be resolved you probably do not have a folder called "raw" in your project. In order to get rid of the error create a folder called "raw" in your Android Project folder.
由于无法解析“raw”，您的项目中可能没有名为“raw”的文件夹。为了消除错误，请在您的 Android 项目文件夹中创建一个名为“raw”的文件夹。
I am not 100% sure about this but I am also quite sure that files inside the "raw" folder cannot contain CAPITAL letters. (only a-z0-9)
我对此不是 100% 确定，但我也很确定“原始”文件夹中的文件不能包含大写字母。（仅 a-z0-9）
回答by Chinmai Kulkarni
You need to right-click on res->new->Android resource directory.
Select raw in resource type and it automatically selects raw as the directory name.
Drag and drop your .mp3 music file inside the res folder. Make sure that it starts with a small letter.
您需要右键单击 res->new->Android 资源目录。
在资源类型中选择 raw ，它会自动选择 raw 作为目录名称。
将您的 .mp3 音乐文件拖放到 res 文件夹中。确保它以小写字母开头。
