android - 如何提高 gridview 性能 (android)

Question

如何提高 gridView 的性能？滚动不流畅。

这是我的代码:

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

        View MyView;

        // Inflate the layout
        LayoutInflater li = ((Activity) MyContext).getLayoutInflater();

        MyView = li.inflate(R.layout.gallery_adapter, null);
        ImageButton imageFolders = (ImageButton) MyView.findViewById(R.id.folder);


        try {

            imageFolders.setImageBitmap(bMap);
            imageFolders.setOnClickListener(this);
            imageFolders.setId(products.get(position).getId());
        } catch (Exception e) {

        }

        MyView.setLayoutParams(70, 70);
        return MyView;
    }

我在这个 gridView 上有大约 200 张图片，但性能非常非常糟糕。

Answer 1

你可以这样修改你的代码:

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

    View MyView;

    if(convertView==null) 
    {
        // Inflate the layout
        LayoutInflater li = ((Activity) MyContext).getLayoutInflater();

        MyView = li.inflate(R.layout.gallery_adapter, null);
        ImageButton imageFolders = (ImageButton) MyView.findViewById(R.id.folder);


        try {

            imageFolders.setImageBitmap(bMap);
            imageFolders.setOnClickListener(this);
            imageFolders.setId(products.get(position).getId());
        } catch (Exception e) {

        }

        MyView.setLayoutParams(70, 70);
    }
    else
        MyView = convertView;
    return MyView;
}

已经载入的图片不会重新载入。你尝试过这种可能性吗？