67 lines
2.1 KiB
Java
67 lines
2.1 KiB
Java
/*
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* Copyright 2016 Hippo Seven
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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 com.hippo.drawable;
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import android.graphics.Bitmap;
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import android.util.Log;
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import androidx.annotation.Nullable;
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import java.lang.ref.WeakReference;
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import java.util.Iterator;
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import java.util.LinkedHashSet;
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import java.util.Set;
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class BitmapPool {
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private static final String TAG = BitmapPool.class.getSimpleName();
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private final Set<WeakReference<Bitmap>> mReusableBitmapSet = new LinkedHashSet<>();
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public synchronized void put(@Nullable Bitmap bitmap) {
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if (bitmap != null) {
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mReusableBitmapSet.add(new WeakReference<>(bitmap));
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}
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}
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@Nullable
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public synchronized Bitmap get(int width, int height) {
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final Iterator<WeakReference<Bitmap>> iterator = mReusableBitmapSet.iterator();
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Bitmap item;
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while (iterator.hasNext()) {
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item = iterator.next().get();
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if (item != null) {
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if (item.getWidth() == width && item.getHeight() == height) {
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// Remove from reusable set so it can't be used again.
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iterator.remove();
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return item;
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}
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} else {
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// Remove from the set if the reference has been cleared or
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// it can't be used.
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iterator.remove();
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}
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}
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// Can not find reusable bitmap
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try {
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return Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
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} catch (OutOfMemoryError e) {
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Log.e(TAG, "Out of memory");
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return null;
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}
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}
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}
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