/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.v4.graphics.drawable;
import android.graphics.drawable.Drawable;
/**
* Helper for accessing features in {@link android.graphics.drawable.Drawable}
* introduced after API level 4 in a backwards compatible fashion.
*/
public class DrawableCompat {
/**
* Interface for the full API.
*/
interface DrawableImpl {
void jumpToCurrentState(Drawable drawable);
}
/**
* Interface implementation that doesn't use anything about v4 APIs.
*/
static class BaseDrawableImpl implements DrawableImpl {
@Override
public void jumpToCurrentState(Drawable drawable) {
}
}
/**
* Interface implementation for devices with at least v11 APIs.
*/
static class HoneycombDrawableImpl implements DrawableImpl {
@Override
public void jumpToCurrentState(Drawable drawable) {
DrawableCompatHoneycomb.jumpToCurrentState(drawable);
}
}
/**
* Select the correct implementation to use for the current platform.
*/
static final DrawableImpl IMPL;
static {
final int version = android.os.Build.VERSION.SDK_INT;
if (version >= 11) {
IMPL = new HoneycombDrawableImpl();
} else {
IMPL = new BaseDrawableImpl();
}
}
/**
* Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()}.
* If running on a pre-{@link android.os.Build.VERSION_CODES#HONEYCOMB} device
* this method does nothing.
*/
public static void jumpToCurrentState(Drawable drawable) {
IMPL.jumpToCurrentState(drawable);
}
}