Android中的原始文件夹

Question

I am trying to play sound effects in a application. Everywhere I look, I am being told to add a raw folder in the res directory(working in eclipse).

First, I add the raw folder under res. Then I put my .wav files inside. When I try to use R.raw.filename in my code, I get an error "raw cannot be resolved". So I clean and rebuild the project. Suddenly, everywhere that I used R.id or R.anything is underlined as an error. When I looked up the error, it turns out that it had something to do with Android.R. Nothing I did could fix it. So I removed the raw folder and rebuilt the project. All of a sudden, everything is fine.

I've repeated this process about 4 times and I have no idea why it's such a pain to add the raw folder. Can anyone tell me what I'm doing wrong?

Answer 1

Do any of your .wav files contains invalid characters in their name? Check if maybe the following messages are shown somewhere in your build:

Unparsed aapt error(s)! Check the console for output.

and

Invalid file name: must contain only [a-z0-9_.]

Only lowercase characters, digits, underscore and period are valid for the names plus extensions.

Answer 2

Use assets folder and ...

InputStream sound = getAssets().open("filename.mp3");

... or raw folder and ...

InputStream sound = getResources().openRawResource(R.raw.filename);

Just make sure that the file called filename exists in the directory called raw .

If all uses of R.* are underlined, delete the import android.R in the upper part of your class as Maxim mentioned.

Answer 3

Apparently your activity added import android.R, after that all references with R goes to android framework (android.jar) which doesn't know anything about your raw files. Just check imports and if you see android.R, delete it and add com.my_app_namespace.R Should work after that

Answer 4

我不确定这是否可以作为解决方案，但是当我使用.ogg文件而不是.wav文件时，一切都运行良好。