Merge "Add explicit note that LayoutInflater is not thread-safe"

 * {@link Context#getSystemService} to retrieve a standard LayoutInflater instance

 * that is already hooked up to the current context and correctly configured

 * for the device you are running on.

 *

 * <p>

 * To create a new LayoutInflater with an additional {@link Factory} for your

 * own views, you can use {@link #cloneInContext} to clone an existing

 * ViewFactory, and then call {@link #setFactory} on it to include your

 * Factory.

 *

 * <p>

 * For performance reasons, view inflation relies heavily on pre-processing of

 * XML files that is done at build time. Therefore, it is not currently possible

 * to use LayoutInflater with an XmlPullParser over a plain XML file at runtime;

 * it only works with an XmlPullParser returned from a compiled resource

 * (R.<em>something</em> file.)

 * <p>

 * <strong>Note:</strong> This class is <strong>not</strong> thread-safe and a given

 * instance should only be accessed by a single thread.

 */

@SystemService(Context.LAYOUT_INFLATER_SERVICE)

public abstract class LayoutInflater {