Android-配备毕加索或通用图像加载器的厨房

Question

我正试图使用GridView毕加索\通用图像加载器制作一个画廊，我遇到了一些问题。每次我只加载本地文件（从外部存储），而不是从web。我制作了两个视频，更好地描述了问题，然后是文字。

我使用自定义适配器扩展BaseAdapter。

拇指是带有图像的File数组

加载图像速度足够快，但滚动速度非常慢。这是youtube上的视频演示

    @Override
public View getView(int position, View convertView, ViewGroup parent) {

    //Get the view
    View view;
    if (convertView == null)
        view=inflater.inflate(R.layout.gallery_photo_item,parent,false);
    else
        view =  convertView;

    //find the componetnts
    final ImageView image_view = (ImageView)view.findViewById(R.id.galley_photo_item_image);
    final CheckBox check = (CheckBox)view.findViewById(R.id.galley_photo_item_checkbox);

    //Toggling checkbox if DELETE MODE
    if(is_checking) {
        check.setChecked(false);
        check.setVisibility(View.VISIBLE);
    }
    else
        check.setVisibility(View.INVISIBLE);

    view.setTag(position);
    check.setTag(position);

    //Some event handling
    check.setOnClickListener(this);
    view.setOnClickListener(this);

    //Setting up Picasso
    Picasso.Builder builder = new Picasso.Builder(context);
    builder.listener(new com.squareup.picasso.Picasso.Listener() {

        @Override
        public void onImageLoadFailed(Picasso picasso, Uri uri, Exception exception) {
            Log.e("Picasso","Loading failed: "+exception.getMessage());
            image_view.setVisibility(View.GONE);
        }

    });

    //Display image
    Picasso pic = builder.build();
    pic
            .load(thumbs[position])
            //.placeholder(R.drawable.ic_launcher)
            .fit()
            .into(image_view);


    return view;
}

滚动速度快，但加载速度慢。此外，当你快速滚动时，你可以看到错误的图像，这些图像将被正确的（加载后）替换几秒钟。youtube上的演示

我在这里添加了视图保持器模式。

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder view_holder;
    if(convertView==null)
    {
        convertView = inflater.inflate(R.layout.gallery_photo_item,parent,false);
        ImageView image = (ImageView)convertView.findViewById(R.id.galley_photo_item_image);
        CheckBox checkBox = (CheckBox)convertView.findViewById(R.id.galley_photo_item_checkbox);
        view_holder = new ViewHolder(convertView,image,checkBox);
        convertView.setTag(view_holder);
    }
    else
        view_holder = (ViewHolder)convertView.getTag();

    //Toggle checkbox on DELETE MODE
    if(is_checking) {
        view_holder.CheckBox.setChecked(false);
        view_holder.CheckBox.setVisibility(View.VISIBLE);
    }
    else
        view_holder.CheckBox.setVisibility(View.INVISIBLE);

    //view.setTag(position);
    //check.setTag(position);

    //Event handling
    view_holder.CheckBox.setOnClickListener(this);
    view_holder.View.setOnClickListener(this);

    //Display image
    String uri = Uri.fromFile(thumbs[position]).toString();
    ImageLoader loader = ImageLoader.getInstance();
    loader.displayImage(uri,view_holder.ImageView, options);


    return convertView;
}

有什么好方法可以让gallery更快地工作（完美地作为一个原生android应用程序）？

Answer 1

尝试使用谷歌推荐的Glide Image Loader Library，请参阅此处：-https://coderzpassion.com/android-working-glide-image-loader-library/