Android Hello, Gallery tutorial — “R.styleable cannot be resolved”

Question

When working on the Hello, Gallery tutorial/sample app, after following the instructions on the site, Eclipse reported that R.styleable cannot be resolved.

What is t

Answer 1

styleable is not supported http://developer.android.com/sdk/RELEASENOTES.html

The android.R.styleable class and its fields were removed from the public API, to better ensure forward-compatibility for applications. The constants declared in android.R.styleable were platform-specific and subject to arbitrary change across versions, so were not suitable for use by applications. You can still access the platform's styleable attributes from your resources or code. To do so, declare a custom resource element using a <declare-styleable> in your project's res/values/R.attrs file, then declare the attribute inside. For examples, see <sdk>/samples/ApiDemos/res/values/attrs.xml. For more information about custom resources, see Custom Layout Resources. Note that the android.R.styleable documentation is still provided in the SDK, but only as a reference of the platform's styleable attributes for the various elements.