求助一个比较难的问题

[cnaaa8]

adapter调用 notifyDataSetChanged 不会更新

package com.gift.android.travel.fragment;

import java.util.ArrayList;

import java.util.List;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import com.gift.android.R;
import com.gift.android.Utils.HttpUtils;
import com.gift.android.Utils.ImageCache;
import com.gift.android.Utils.Utils;
import com.gift.android.travel.fragment.base.BaseTravelFragment;
import com.gift.android.travel.model.PhotoWallJson;
import com.gift.android.travel.model.PhotoWallList;

import com.gift.android.widget.pulltorefreshlistview.PullToRefreshBase;
import com.gift.android.widget.pulltorefreshlistview.PullToRefreshBase.OnRefreshListener2;
import com.gift.android.widget.pulltorefreshlistview.PullToRefreshGridView;
import com.google.gson.Gson;

/**
 * 目的地 -照片墙
 * 
 * @author duanzheng
 * 
 */

public class microtravelDetailiInfoPhotoWallFragment extends BaseTravelFragment
		implements OnRefreshListener2<GridView> {
	private LayoutInflater inflater;
	private View mtdipw;
	private PullToRefreshGridView gv;

	private int pageIndex = 1;
	private int pageSize = 15;

	private gvadapter adapter;
	private PhotoWallJson photoWallJson;
	private List<PhotoWallList> list;

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		this.inflater = inflater;
		mtdipw = inflater.inflate(
				R.layout.microtravel_detaili_info_photowall_fragment, null);
		return super.onCreateView(inflater, container, savedInstanceState);
	}

	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		setContentView(mtdipw);
		findbyid();
		initView();
		getDate(true);
		super.onViewCreated(view, savedInstanceState);
	}

	private void getDate(boolean isStartAnimator) {
		String args = String.format("&destId=%s&version=%s", "3559", "1.0.0");
		if (isStartAnimator) {
			loading.doGet(
					"http://192.168.0.64/api/router/rest.do?method=api.com.trip.dest.pic"
							+ args, "api.com.trip.dest.pic", 0, "", this);
		} else {
			HttpUtils.getInstance().doGet(
					"http://192.168.0.64/api/router/rest.do?method=api.com.trip.dest.pic"
							+ args, "api.com.trip.dest.pic", 0, "", this);
		}

	}

	public void requestFinished(String response, String method) {
		Log.i("test", "response:" + response);

		Gson gson = new Gson();
		photoWallJson = gson.fromJson(response, PhotoWallJson.class);

		if (photoWallJson.code == 1) {
			if (photoWallJson.data != null && photoWallJson.data.list != null
					&& photoWallJson.data.list.size() > 0) {
				
				Log.i("test", "更新前list:" + list.size());
				//for(int i=0;i<30;i++){
				list.addAll(photoWallJson.data.list);
				//}
				Log.i("test", "更新后list:--->" + list.size());
				gv.setLastPage(photoWallJson.data.hasNext);
				if (!photoWallJson.data.hasNext) {
					pageIndex++;
				}
				Log.i("test", "开始更新数据");
				adapter.notifyDataSetChanged();//这一行执行后不会更新，list已经改变
			}
		}

		gv.onRefreshComplete();
	}

	public void requestFailure(Throwable t, String method) {
		if (gv != null) {
			gv.onRefreshComplete();
		}
		Utils.showToast(getActivity(), R.drawable.face_fail,
				"哎呀，网络不给力\n请稍后再试试吧", 0);
	}

	private void initView() {
		list = new ArrayList<PhotoWallList>();

		adapter = new gvadapter(getActivity(), list);
		gv.setAdapter(adapter);

		gv.setOnRefreshListener(this);

	}

	private void findbyid() {
		gv = (PullToRefreshGridView) mtdipw.findViewById(R.id.gv);
	}

	class gvadapter extends BaseAdapter {
		private Context mContext;
		// private List<PhotoWallList> list = new ArrayList<PhotoWallList>();

		/*
		 * public List<PhotoWallList> getList() { return list; }
		 */
		private List<PhotoWallList> mList;

		public gvadapter(Context context, List<PhotoWallList> list) {
			super();
			Log.i("test", "进来:" + list.size());
			this.mContext = context;
			this.mList = list;
			// TODO Auto-generated constructor stub
		}

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			//return (mList != null ? mList.size() : 0);
			return (mList != null && mList.size()>0 ? 20 : 0);
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return mList.get(position);
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			ViewHolder holder;
			if (convertView == null) {
				holder = new ViewHolder();
				convertView = View.inflate(mContext,
						R.layout.microtravel_detaili_info_photowall_item, null);
				holder.iv = (ImageView) convertView.findViewById(R.id.iv);
				convertView.setTag(holder);
			} else {
				holder = (ViewHolder) convertView.getTag();
			}

			/*ImageCache
					.display(
							"http://s0.hao123img.com/res/r/image/2014-09-23/0e348339febbb4eb0c3ceeba26067a1b.jpg",
							holder.iv, R.drawable.coverdefault);*/
			
			holder.iv.setBackgroundResource(R.drawable.coverdefault_170);

			
			return convertView;
		}

	}

	class ViewHolder {
		ImageView iv;
	}

	@Override
	public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
		// TODO Auto-generated method stub
		getDate(false);
		pageIndex = 1;
	}

	@Override
	public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
		// TODO Auto-generated method stub
		if (gv.isLastPage()) {
			gv.onRefreshComplete();
		} else {
			getDate(false);
		}
	}

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <View
        android:layout_width="fill_parent"
        android:layout_height="1dp"
        android:background="#F1F1F1" />

    <com.gift.android.widget.pulltorefreshlistview.PullToRefreshGridView xmlns:ptr="http://schemas.android.com/apk/res/com.gift.android"
        android:id="@+id/gv"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:horizontalSpacing="5dp"
        android:listSelector="@null"
        android:numColumns="3"
        android:scrollbars="none"
        android:verticalSpacing="5dp"
        ptr:ptrMode="both" >
    </com.gift.android.widget.pulltorefreshlistview.PullToRefreshGridView>

</LinearLayout>

[skgary]

你执行完之后，有没有试着滚动过？ 有没有可能是实际已经更新了，但是新的数据在最下面？ 代码好像没有什么问题

[红袖满楼招]

list.addAll(photoWallJson.data.list);这句代码之前加上一句 list.clear();

[dz215136304]

代码好像没有什么问题