Android三种基本的加载网络图片方式

Android三种基本的加载网络图片方式，包括普通加载网络方式、用ImageLoader加载图片、用Volley加载图片。

普通加载网络方式:

public class NormalLoadPictrue {

private String uri;
private ImageView imageView;
private byte[] picByte;

public void getPicture(String uri,ImageView imageView){
this.uri = uri;
this.imageView = imageView;
new Thread(runnable).start();
}

@SuppressLint("HandlerLeak")
Handler handle = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == 1) {
if (picByte != null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(picByte, 0, picByte.length);
imageView.setImageBitmap(bitmap);
}
}
}
};

Runnable runnable = new Runnable() {
@Override
public void run() {
try {
URL url = new URL(uri);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setRequestMethod("GET");
conn.setReadTimeout(10000);

if (conn.getResponseCode() == 200) {
InputStream fis = conn.getInputStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
byte[] bytes = new byte[1024];
int length = -1;
while ((length = fis.read(bytes)) != -1) {
bos.write(bytes, 0, length);
}
picByte = bos.toByteArray();
bos.close();
fis.close();

Message message = new Message();
message.what = 1;
handle.sendMessage(message);
}

}catch (IOException e) {
e.printStackTrace();
}
}
};

}

用ImageLoader加载图片

public class ImageLoaderPicture {

private DisplayImageOptions options;

public ImageLoaderPicture(Context context) {

ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context).threadPriority(Thread.NORM_PRIORITY - 2)
.denyCacheImageMultipleSizesInMemory()
.discCacheFileNameGenerator(new Md5FileNameGenerator())
.tasksProcessingOrder(QueueProcessingType.LIFO).enableLogging()
.memoryCache(new WeakMemoryCache())
.build();
ImageLoader.getInstance().init(config);

options = new DisplayImageOptions.Builder()
.showStubImage(0)
.showImageForEmptyUri(0)
.showImageOnFail(0)
.cacheInMemory().cacheOnDisc()
.imageScaleType(ImageScaleType.IN_SAMPLE_INT)
.bitmapConfig(android.graphics.Bitmap.Config.RGB_565)
.build();
}

public DisplayImageOptions getOptions() {
return options;
}

public void setOptions(DisplayImageOptions options) {
this.options = options;
}

}

用Volley加载图片

public class VolleyLoadPicture { private ImageLoader mImageLoader = null ; private BitmapCache mBitmapCache; private ImageListener one_listener; public VolleyLoadPicture(Context context,ImageView imageView){ one_listener = ImageLoader.getImageListener(imageView, 0 , 0 ); RequestQueue mRequestQueue = Volley.newRequestQueue(context); mBitmapCache = new BitmapCache(); mImageLoader = new ImageLoader(mRequestQueue, mBitmapCache); } public ImageLoader getmImageLoader() { return mImageLoader; } public void setmImageLoader(ImageLoader mImageLoader) { this .mImageLoader = mImageLoader; } public ImageListener getOne_listener() { return one_listener; } public void setOne_listener(ImageListener one_listener) { this .one_listener = one_listener; } class BitmapCache implements ImageCache { private LruCache mCache; private int sizeValue; public BitmapCache() { int maxSize = 10 * 1024 * 1024 ; mCache = new LruCache(maxSize) { @Override protected int sizeOf(String key, Bitmap value) { sizeValue = value.getRowBytes() * value.getHeight(); return sizeValue; } }; } @Override public Bitmap getBitmap(String url) { return mCache.get(url); } @Override public void putBitmap(String url, Bitmap bitmap) { mCache.put(url, bitmap); } } }

用ImageLoader加载图片

用Volley加载图片

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