/*
* Copyright (C) 2012 YIXIA.COM
*
* 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 com.yixia.zi.loader;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import android.app.Activity;
import android.graphics.Bitmap;
import android.widget.ImageView;
public abstract class ImageLoader<T> {
private AtomicBoolean mStopped = new AtomicBoolean(Boolean.FALSE);
private ThreadPoolExecutor mQueue;
private MemoryCache<T> mCacheBitmap = new MemoryCache<T>();
public ImageLoader() {
mQueue = new ThreadPoolExecutor(10, 10, 60, TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>(), sThreadFactory);
mQueue.allowCoreThreadTimeOut(true);
}
public abstract Bitmap getBitmap(final T id);
public void displayImage(final T id, final Activity activity, final ImageView imageView) {
Bitmap bitmap = mCacheBitmap.get(id);
if (bitmap != null) {
imageView.setImageBitmap(bitmap);
} else {
imageView.setTag(id);
mQueue.execute(new Runnable() {
@Override
public void run() {
final Bitmap bitmap = getBitmap(id);
if (bitmap != null && !bitmap.isRecycled()) {
mCacheBitmap.put(id, bitmap);
Object tag = imageView.getTag();
if (tag.equals(id)) {
if (activity != null) {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
imageView.setImageBitmap(bitmap);
}
});
}
}
}
}
});
}
}
public void stopThread() {
if (!mStopped.get()) {
mQueue.shutdownNow();
mCacheBitmap.clear();
mStopped.set(Boolean.TRUE);
}
}
private static final ThreadFactory sThreadFactory = new ThreadFactory() {
private final AtomicInteger mCount = new AtomicInteger(1);
@Override
public Thread newThread(Runnable r) {
return new Thread(r, "ImageLoader #" + mCount.getAndIncrement());
}
};
}