android在listview中放入从sdcard读取的bitmap

重写viewbinder

public class viewbinder_bookmark implements SimpleAdapter.ViewBinder{
    @Override
    public boolean setViewValue(View view, Object data, String textRepresentation){
        if(view instanceof ImageView && data instanceof Bitmap){
            ImageView imageview=(ImageView)view;
            Bitmap bitmap=(Bitmap)data;
            imageview.setImageBitmap(bitmap);
            return true;
        }
        return false;
    }
}

再给simpleadapter设置viewbinder

List<Map<String,Object>> arraylist_bookmark=new ArrayList<Map<String,Object>>();
        Map<String,Object> item_bookmark=new HashMap<String,Object>();
        item_bookmark.put("bookmark_title","百度一下");
        item_bookmark.put("bookmark_favicon",bitmap);
        arraylist_bookmark.add(item_bookmark);
        SimpleAdapter simpleAdapter=new SimpleAdapter(MainActivity.this ,arraylist_bookmark,R.layout.layout_bookmark_item,new String[]{"bookmark_title","bookmark_favicon"},new int[]{R.id.bookmark_title,R.id.bookmark_favicon});
        simpleAdapter.setViewBinder(new viewbinder_bookmark());
        listview_bookmark=(ListView)findViewById(R.id.listview_bookmark);
        listview_bookmark.setAdapter(simpleAdapter);