Android Base64转换图片，SimpleAdapter动态显示Bitmap图片

 public Bitmap stringtoBitmap(String string){        //将字符串转换成Bitmap类型        Bitmap bitmap=null;        try {            byte[]bitmapArray;            bitmapArray=Base64.decode(string, Base64.DEFAULT);            bitmap= BitmapFactory.decodeByteArray(bitmapArray, 0, bitmapArray.length);        } catch (Exception e) {            e.printStackTrace();        }        return bitmap;    }

SimpleAdapter 默认是静态显示程序内部的本地资源；在显示网上的远程图片时，需要实现ViewBinder()接口，在里面定义数据和视图的匹配关系。

public void Search(){                     List> data = new ArrayList>();            String photo = null;            String ret= null;            for(int i=0;i map = new HashMap();                map.put("imageView1",stringtoBitmap(ret));                data.add(map);            }            SimpleAdapter simplead = new SimpleAdapter(                    mContext,                    data,                    R.layout.photo_history_item,                    new String[] { "imageView1"},                    new int[] {R.id.imageView1});            //实现ViewBinder()这个接口            simplead.setViewBinder(new SimpleAdapter.ViewBinder() {                @Override                public boolean setViewValue(View view, Object data,                                            String textRepresentation) {                    if(view instanceof ImageView && data instanceof Bitmap){                        ImageView i = (ImageView)view;                        i.setImageBitmap((Bitmap) data);                        return true;                    }                    return false;                }            });            GridView1.setAdapter(simplead);        }    }

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