mirror of
https://github.com/material-components/material-components-android.git
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ab2fec6da4
Bazel is happier if Java/Java test roots are named 'java' and 'javatests', and
this will mean that once we create a BUILD file for
android/support/design/{widget,internal}/ we'll no longer need a custom package
specified in our build (which tends to cause build problems that manifest quite
weirdly). This commit doesn't attempt to refactor the build at all yet, and is
just a pure move.
PiperOrigin-RevId: 178060739
63 lines
1.8 KiB
Java
63 lines
1.8 KiB
Java
/*
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* Copyright 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.support.design.animation;
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import android.graphics.drawable.Drawable;
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import android.os.Build.VERSION;
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import android.os.Build.VERSION_CODES;
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import android.util.Property;
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import java.util.WeakHashMap;
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/**
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* Compat property for {@link Drawable#getAlpha()} and {@link Drawable#setAlpha(int)} for pre-K
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* devices.
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*/
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public class DrawableAlphaProperty extends Property<Drawable, Integer> {
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/**
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* A compat Property wrapper around {@link Drawable#getAlpha()} and {@link
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* Drawable#setAlpha(int)}.
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*/
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public static final Property<Drawable, Integer> DRAWABLE_ALPHA_COMPAT =
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new DrawableAlphaProperty();
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private final WeakHashMap<Drawable, Integer> alphaCache = new WeakHashMap<>();
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private DrawableAlphaProperty() {
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super(Integer.class, "drawableAlphaCompat");
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}
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@Override
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public Integer get(Drawable object) {
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if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
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return object.getAlpha();
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}
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if (alphaCache.containsKey(object)) {
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return alphaCache.get(object);
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}
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return 0xFF;
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}
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@Override
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public void set(Drawable object, Integer value) {
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if (VERSION.SDK_INT < VERSION_CODES.KITKAT) {
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alphaCache.put(object, value);
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}
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object.setAlpha(value);
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}
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}
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