Android res/目录下子目录详解

Bitmap files (.png, .9.png, .jpg, .gif) or XML files that are compiled into the following drawable resource subtypes:

• Bitmap files
• Nine-Patches (re-sizable bitmaps)
• State lists
• Shapes
• Animation drawables
• Other drawables

See Drawable Resources.

Arbitrary files to save in their raw form. To open these resources with a raw InputStream, call Resources.openRawResource() with the resource ID, which is R.raw.filename.

However, if you need access to original file names and file hierarchy, you might consider saving some resources in the assets/ directory (instead of res/raw/). Files in assets/are not given a resource ID, so you can read them only using AssetManager.

XML files that contain simple values, such as strings, integers, and colors.

Whereas XML resource files in other res/ subdirectories define a single resource based on the XML filename, files in the values/ directory describe multiple resources. For a file in this directory, each child of the <resources> element defines a single resource. For example, a <string> element creates an R.string resource and a <color> element creates an R.color resource.

Because each resource is defined with its own XML element, you can name the file whatever you want and place different resource types in one file. However, for clarity, you might want to place unique resource types in different files. For example, here are some filename conventions for resources you can create in this directory:

• arrays.xml for resource arrays (typed arrays).
• colors.xml for color values
• dimens.xml for dimension values.
• strings.xml for string values.
• styles.xml for styles.

See String Resources, Style Resource, and More Resource Types.