Android 图片资源的异步加载2
来源:互联网 发布:c 调用 golang so 编辑:程序博客网 时间:2024/04/29 05:19
public class AsyncImageLoader {
private HashMap<String, SoftReference<Bitmap>> imageCache;
private static AsyncImageLoader asyncImageLoader;
public AsyncImageLoader() {
imageCache = new HashMap<String, SoftReference<Bitmap>>();
}
/**
* @return 得到类实例
*/
public static AsyncImageLoader getInstance() {
if (asyncImageLoader == null) {
asyncImageLoader = new AsyncImageLoader();
}
return asyncImageLoader;
}
/**
* @param imageUrl
* 图片url
* @param imageCallback
* 回调函数
* @return 图片
*/
public Bitmap loadDrawable(final String imageUrl,
final ImageCallback imageCallback) {
if (imageCache.containsKey(imageUrl)) {
SoftReference<Bitmap> softReference = imageCache.get(imageUrl);
Bitmap bitmap = softReference.get();
if (bitmap != null) {
return bitmap;
}
}
final Handler handler = new Handler() {
public void handleMessage(Message message) {
imageCallback.imageLoaded((Bitmap) message.obj, imageUrl);
}
};
new Thread() {
@Override
public void run() {
Bitmap bitmap = loadImageFromUrl(imageUrl);
imageCache.put(imageUrl, new SoftReference<Bitmap>(bitmap));
Message message = handler.obtainMessage(0, bitmap);
handler.sendMessage(message);
}
}.start();
return null;
}
/**
* @param url
* 图片url
* @return 下载到的图片
*/
public static Bitmap loadImageFromUrl(String url) {
URL m;
InputStream i = null;
try {
m = new URL(url);
HttpURLConnection conn = (HttpURLConnection) m.openConnection();
conn.setConnectTimeout(30 * 1000);
conn.setRequestMethod("GET");
i = conn.getInputStream();
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bitmap = BitmapFactory.decodeStream(i);
// Drawable d = Drawable.createFromStream(i, "src");
return bitmap;
}
public interface ImageCallback {
public void imageLoaded(Bitmap imageBitmap, String imageUrl);
}
}
private HashMap<String, SoftReference<Bitmap>> imageCache;
private static AsyncImageLoader asyncImageLoader;
public AsyncImageLoader() {
imageCache = new HashMap<String, SoftReference<Bitmap>>();
}
/**
* @return 得到类实例
*/
public static AsyncImageLoader getInstance() {
if (asyncImageLoader == null) {
asyncImageLoader = new AsyncImageLoader();
}
return asyncImageLoader;
}
/**
* @param imageUrl
* 图片url
* @param imageCallback
* 回调函数
* @return 图片
*/
public Bitmap loadDrawable(final String imageUrl,
final ImageCallback imageCallback) {
if (imageCache.containsKey(imageUrl)) {
SoftReference<Bitmap> softReference = imageCache.get(imageUrl);
Bitmap bitmap = softReference.get();
if (bitmap != null) {
return bitmap;
}
}
final Handler handler = new Handler() {
public void handleMessage(Message message) {
imageCallback.imageLoaded((Bitmap) message.obj, imageUrl);
}
};
new Thread() {
@Override
public void run() {
Bitmap bitmap = loadImageFromUrl(imageUrl);
imageCache.put(imageUrl, new SoftReference<Bitmap>(bitmap));
Message message = handler.obtainMessage(0, bitmap);
handler.sendMessage(message);
}
}.start();
return null;
}
/**
* @param url
* 图片url
* @return 下载到的图片
*/
public static Bitmap loadImageFromUrl(String url) {
URL m;
InputStream i = null;
try {
m = new URL(url);
HttpURLConnection conn = (HttpURLConnection) m.openConnection();
conn.setConnectTimeout(30 * 1000);
conn.setRequestMethod("GET");
i = conn.getInputStream();
} catch (MalformedURLException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
Bitmap bitmap = BitmapFactory.decodeStream(i);
// Drawable d = Drawable.createFromStream(i, "src");
return bitmap;
}
public interface ImageCallback {
public void imageLoaded(Bitmap imageBitmap, String imageUrl);
}
}
- Android 图片资源的异步加载2
- Android的图片异步加载
- android 异步图片的加载
- Android 图片的异步加载
- libgdx异步加载图片资源
- Android异步加载图片资源,BitmapFactory.decodeStream返回null的问题
- android异步的网络图片加载,支持多线程异步加载
- android异步加载图片
- android 异步加载图片
- android异步加载图片
- android异步加载图片
- Android 异步加载图片
- Android 异步加载图片
- Android图片异步加载
- Android图片异步加载
- Android图片异步加载
- Android异步加载图片
- android异步加载图片
- 《Objective-C程序设计(第四版)》读书笔记(二)
- OOAD笔记五
- C# using 三种使用方式
- PHPcms v9 get标签sql 语句limit无效问题的解决方法
- 一位老鸟对 23 种设计模式的有趣见解
- Android 图片资源的异步加载2
- Javascript实现CheckBox的全选与取消全选的代码
- 怎样写好一份分析报告
- js提交表单的问题
- Hadoop
- 毕业一年总结专题3--Hessian与spring http invoke
- Java的引用StrongReference、 SoftReference、 WeakReference 、PhantomReference
- Wsdl文件详细介绍
- AWK 用法