形成一个Resource Uri

形成一个Resource Uri:

public Uri getResourceUri(Context packageContext, int res) {
		try {
			Resources resources = packageContext.getResources();
			return getResourceUri(resources, packageContext.getPackageName(),
					res);
		} catch (Resources.NotFoundException e) {
			return null;
		}
	}

	private static Uri getResourceUri(Resources resources, String appPkg,
			int res) throws Resources.NotFoundException {
		String resPkg = resources.getResourcePackageName(res);
		String type = resources.getResourceTypeName(res);
		String name = resources.getResourceEntryName(res);
		System.out.println("resPkg="+resPkg+",type="+type+",name="+name);
		
		return makeResourceUri(appPkg, resPkg, type, name);
	}

	private static Uri makeResourceUri(String appPkg, String resPkg,
			String type, String name) {
		Uri.Builder uriBuilder = new Uri.Builder();
		uriBuilder.scheme(ContentResolver.SCHEME_ANDROID_RESOURCE);
		uriBuilder.encodedAuthority(appPkg);
		uriBuilder.appendEncodedPath(type);
		if (!appPkg.equals(resPkg)) {
			uriBuilder.appendEncodedPath(resPkg + ":" + name);
		} else {
			uriBuilder.appendEncodedPath(name);
		}
		return uriBuilder.build();
	}

比如将R.drawable.icon的结果如：
02-28 01:44:46.089: INFO/System.out(282): resPkg=com.android.test,type=drawable,name=icon
02-28 01:44:46.099: INFO/System.out(282): Build uril=android.resource://com.android.test/drawable/icon
通过conterx和Resource Id我们可以获得resource的name和type