如何使用NetworkImageView在ListView [英] How to use NetworkImageView in a ListView

问题描述

我在Android的新的和我被困的东西。
我有一个LisView，我试图下载使用NetworkImageView图像，但我不能设法去做。

我有这个在onCreate方法：

  networkImageView =（NetworkImageView）findViewById（R.id.thumbImageUrl）;
mRequestQueue = Volley.newRequestQueue（本）;
ImageLoader的=新ImageLoader的（mRequestQueue，新BitmapLruCache（BitmapLruCache.getDefaultLruCacheSize（）））;networkImageView.setImageUrl（IMAGE_URL，ImageLoader的）;
 

但它不工作，我不知道为什么。

谁能告诉我该怎么办呢？我觉得我没有理解太清楚如何使用NetworkImageView。

PS：我BitmapLruCache.java

 公共类BitmapLruCache扩展LruCache＆LT;弦乐，位图＆GT;实现ImageCache {    公共静态INT getDefaultLruCacheSize（）{
        最终诠释maxMemory =（INT）（调用Runtime.getRuntime（）maxMemory（）/ 1024）;
        最终诠释的cachesize = maxMemory / 8;        返回CACHESIZE;
    }    公共BitmapLruCache（）{
        这个（getDefaultLruCacheSize（））;
    }    公共BitmapLruCache（INT sizeInKiloBytes）{
        超（sizeInKiloBytes）;
    }    @覆盖
    保护INT整型尺寸（字符串键，位值）{
        返回value.getRowBytes（）* value.getHeight（）/ 1024;
    }    @覆盖
    公共位图getBitmap（字符串URL）{
        得到的回报（URL）;
    }    @覆盖
    公共无效putBitmap（字符串URL，位图位图）{
        把（URL，位图）;
    }}
 

解决方案

如果你想图像加载到ListView的项目，你应该这样做在适配器的<一个href=\"http://developer.android.com/reference/android/widget/Adapter.html#getView%28int,%20android.view.View,%20android.view.ViewGroup%29\"相对=nofollow> getView（）方法。勾选此<一个href=\"https://github.com/ogrebgr/android_volley_examples/blob/master/src/com/github/volley_examples/misc/PicasaArrayAdapter.java\"相对=nofollow>例如的。它应该帮助你。

I am new in Android and I got stuck on something. I have a LisView and I am trying to download images using NetworkImageView, but I can't manage to do it.

I have this in onCreate method:

networkImageView = (NetworkImageView) findViewById(R.id.thumbImageUrl);
mRequestQueue = Volley.newRequestQueue(this);
imageLoader = new ImageLoader(mRequestQueue, new BitmapLruCache(BitmapLruCache.getDefaultLruCacheSize()));

networkImageView.setImageUrl(IMAGE_URL, imageLoader);

but it doesn't work and I don't know why.

Can anybody tell me how to do it? I think I didn't understood too well how to use NetworkImageView.

PS: my BitmapLruCache.java

public class BitmapLruCache extends LruCache<String, Bitmap> implements ImageCache {

    public static int getDefaultLruCacheSize() {
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;

        return cacheSize;
    }

    public BitmapLruCache() {
        this(getDefaultLruCacheSize());
    }

    public BitmapLruCache(int sizeInKiloBytes) {
        super(sizeInKiloBytes);
    }

    @Override
    protected int sizeOf(String key, Bitmap value) {
        return value.getRowBytes() * value.getHeight() / 1024;
    }

    @Override
    public Bitmap getBitmap(String url) {
        return get(url);
    }

    @Override
    public void putBitmap(String url, Bitmap bitmap) {
        put(url, bitmap);
    }}

解决方案

If you are trying to load image into ListView's item, you should do it in the Adapter's getView() method. Check this example. It should help you.

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