把NetworkImageView改为ImageView？

Question

我有一个NetworkImageView，但是我想使用一个ImageView来缓存图像，而不是一直从网络获取它。

有什么办法改变吗？

  class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
        //Views
        public NetworkImageView imageView;
        public TextView textViewName;
        public TextView textViewPublisher;

        //Initializing Views
        public ViewHolder(View itemView) {
            super(itemView);
            imageView = (NetworkImageView) itemView.findViewById(R.id.imageViewHero);
            textViewName = (TextView) itemView.findViewById(R.id.textViewName);
            textViewPublisher = (TextView) itemView.findViewById(R.id.textViewPublisher);
            textViewName.setClickable(true);
            textViewName.setOnClickListener(this);
        }

Answer 1

更改布局，从<NetworkImageView到<ImageView，然后从public NetworkImageView imageView;到public ImageView imageView;，从imageView = (NetworkImageView) itemView.findViewById(R.id.imageViewHero);到imageView = (ImageView) itemView.findViewById(R.id.imageViewHero);

希望这对你有帮助

不能直接在ImageView中设置图像。您必须在位图中转换该图像，然后设置

public static Bitmap getBitmapFromURL(String src) {
    try {
        Log.e("src",src);
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        Log.e("Bitmap","returned");
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        Log.e("Exception",e.getMessage());
        return null;
    }
}

然后设置为imageview：

imageView.setImageBitmap(getBitmapFromURL(url));

Answer 2

您可以使用壁画库加载图像。它有很多特征。https://github.com/facebook/fresco

Answer 3

看看毕加索。易于使用，并提供缓存机制。