GridView BaseAdapter 求解解决思路

GridView BaseAdapter 求解
我的一个GridView布局，用的是继承的BaseAdapter，现在的问题是每次我下拉GridView里面的每一行的图片都会变化，下面是我的basedapter主要代码，请高手帮忙看看。

Java code

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        if (convertView == null) {
            convertView = layoutInflater.inflate(R.layout.xin_fjshname, null);
        }
        TextView tv_name = (TextView) convertView.findViewById(R.id.tv_xin_fjshname);
        LinearLayout ll_image = (LinearLayout) convertView.findViewById(R.id.ll_xin_fjshtp);
        RatingBar rb_stars = (RatingBar) ll_image.findViewById(R.id.rb_xin_stars);
        String name = list.get(position).get("name");
        tv_name.setText(name);
        float grade = Float.parseFloat(list.get(position).get("grade"));
        Log.i(TAG, "grade:" + grade);
        rb_stars.setRating(grade);
        String imagePath = list.get(position).get("imgPath");
        Log.i(TAG, "imagePath:" + imagePath);
        if (!islocal) {
            imagePath = context.getString(R.string.imageIp) + imagePath;
            try {
                Bitmap bitmap = BitmapFactory.decodeStream(new URL(imagePath).openConnection().getInputStream());
                if (bitmap != null) {
                    if (bitmap.getWidth() > 150 && bitmap.getHeight() > 150) {
                        bitmap = tpcq(bitmap);
                        BitmapDrawable drawable = new BitmapDrawable(bitmap);
                        if (drawable != null) {
                            ll_image.setBackgroundDrawable(drawable);
                        }
                    }
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } else {
            Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
            if (bitmap != null) {
                if (bitmap.getWidth() > 150 && bitmap.getHeight() > 150) {
                    bitmap = tpcq(bitmap);
                    ll_image.setBackgroundDrawable(new BitmapDrawable(bitmap));
                }
            }
        }
        return convertView;
    }

下面是裁图片的代码

Java code


    /**
     * 如果图片宽高大于150,则转化为150
     * 
     * @param bitmap
     * @return
     */
    public Bitmap tpcq(Bitmap bitmap) {
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        int newWidht = 150;
        int newHeight = 150;
        float scaleWidth = ((float) newWidht) / width;
        float scaleHeight = ((float) newHeight) / height;
        Matrix matrix = new Matrix();
        matrix.postScale(scaleWidth, scaleHeight);
        Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
        return newBitmap;
    }

------解决方案--------------------
没有仔细看，不妨试一下ViewHolder类

Java code


    static class ViewHolder
    {
        TextView tv;
        LinearLayout ll;
        RatingBar rb;
    }

------解决方案--------------------

我以前也遇到这个问题，后来弄个全局变量，把图片缓存进去，然后adapter每次都去缓存里拿图片

------解决方案--------------------

用到Memory缓存，磁盘缓存，SoftReference等
用下面这开源的项目吧
http://code.google.com/p/android-query/#Image_Loading

GridView BaseAdapter 求解解决思路

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