GridView BaseAdapter 求解

[longer262110]

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。

	@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

	/**
	 * 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;
	}

[dong3560]

没有仔细看，不妨试一下ViewHolder类

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

[veardn]

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

[longer262110]

1楼的方法不知道可行不，2楼的方法可以试一下。

[leafisme]

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