howt解决getview的位置是在Android的

Question

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ViewHolder helper = null; 
    Log.i("StaggeredGridView--Adapter:", "position:" + position); 
    if(convertView ==null){ 
     helper = new ViewHolder(); 
     convertView = LayoutInflater.from(mContext).inflate(R.layout.item_user_details_adapter, null); 
     helper.tv_content = (EmojiconTextView) convertView.findViewById(R.id.txt_content); 
     helper.tv_time = (TextView) convertView.findViewById(R.id.txt_time); 
     helper.tv_zannum = (TextView) convertView.findViewById(R.id.tv_zan_num); 
     helper.tv_plnum = (TextView) convertView.findViewById(R.id.tv_pl_num); 
     helper.iv_show = (DynamicHeightImageView) convertView.findViewById(R.id.img_content);// 展示的图片 
     helper.img_zan = (ImageView) convertView.findViewById(R.id.img_normal);// 已经赞过的改颜色。 
     helper.rel_photo = (RelativeLayout) convertView.findViewById(R.id.rel_photo); 
     convertView.setTag(helper); 
    } else { 
    helper = (ViewHolder) convertView.getTag(); 
    } 

    double positionHeight = getPositionRatio(position); 
    Log.d(TAG, "getView position:" + position + " h:" + positionHeight); 
    helper.iv_show.setHeightRatio(positionHeight); 
    String imgeurl = ""; 
    List<Map<String, String>> listget = mUserInfors.get(position).getmAttach(); 
    if (listget != null && listget.size() > 0) { 
     for (int i = 0; i < listget.size(); i++) { 
      Map<String, String> map = listget.get(i); 
      if (map != null) { 
       if (map.get("attach_middle") != null) { 
        imgeurl = map.get("attach_middle"); 
        if (!TextUtils.isEmpty(imgeurl)) { 
         break; 
        } 
       } 

      } 
     } 
    } 
    List<Map<String, String>> diggerlist = mUserInfors.get(position).getDigger_list(); 
    if (diggerlist.size() > 0) { 
     helper.tv_zannum.setText(diggerlist.size() + ""); 
     boolean state = getCheckstate(diggerlist); 
     if (state) { 
      helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.zan)); 
     } else { 
      helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.normalzan)); 
     } 
    } else { 
     helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.normalzan)); 
    } 
    if (!TextUtils.isEmpty(imgeurl)) { 
     ImageLoader.getInstance().displayImage(imgeurl, helper.iv_show, mDisplayOption); 
    } else { 
     helper.iv_show.setImageDrawable(mContext.getResources().getDrawable(R.drawable.empty_activity_icon)); 
    } 
    String content = mUserInfors.get(position).getContent(); 
    String time = mUserInfors.get(position).getCtime(); 
    helper.tv_time.setText(time.substring(5)); 
    helper.tv_zannum.setText(mUserInfors.get(position).getDigg_count()); 
    helper.tv_plnum.setText(mUserInfors.get(position).getComment_count()); 
    helper.tv_content.setText(content); 
    if (mUserInfors.get(position).getType().equals("post")) { 
     helper.rel_photo.setVisibility(View.GONE); 
     helper.tv_content.setVisibility(View.VISIBLE); 
    } else { 
     if (TextUtils.isEmpty(content)) { 
      helper.tv_content.setVisibility(View.GONE); 
     } else { 
      helper.tv_content.setVisibility(View.VISIBLE); 
     } 
     helper.rel_photo.setVisibility(View.VISIBLE); 
    } 

    return convertView; 

的baseadapter}

以上是getview的代码cofusition，我是在用staggeredgridview Etsy的的，当我滚动屏幕，这个问题是发生，这个位置没有混乱，就好像位置的位置没有被记住。

以下是位置getview的截图：

Answer 1

这个问题来，只有如果你不控制getCount()和getItem()方法。请确保您在getCount()这样返回列表规模为：

@Override 
    public int getCount() { 
    return list.size(); 
    } 

和getItem()为：

@Override 
    public SetterGetterClassName getItem(int position) { 
     return list.get(position); 
    } 

Answer 2

这是我的完整代码：

enter code here 

public class UserDetailsAdapter2 extends BaseAdapter { 
//private HashMap<Integer, View> viewMap; 
private DisplayImageOptions mDisplayOption = new DisplayImageOptions.Builder().cacheInMemory(true).cacheOnDisc(true) 
     .showStubImage(R.drawable.empty_activity_icon).showImageForEmptyUri(R.drawable.empty) 
     .showImageOnFail(R.drawable.empty_activity_icon).imageScaleType(ImageScaleType.EXACTLY) 
     .bitmapConfig(Bitmap.Config.RGB_565).displayer(new FadeInBitmapDisplayer(400)).considerExifParams(true) 
     .build(); 
private Context mContext; 
private List<CellQzones> mUserInfors; 
private UserInfor mUser; 
private String TAG = "UserDetailsAdapter2"; 
private final Random mRandom; 
private static final SparseArray<Double> sPositionHeightRatios = new SparseArray<Double>(); 
//private ImageLoader2 mImageLoader2; 
public UserDetailsAdapter2(Context context, List<CellQzones> mDatas, UserInfor user) { 
    mContext = context; 
    mUserInfors = mDatas; 
    mUser = user; 
    mRandom = new Random(); 
    //viewMap=new HashMap<Integer, View>(); 
} 

@Override 
public int getCount() { 
    return mUserInfors.size(); 
} 

@Override 
public Object getItem(int position) { 
    return mUserInfors.get(position); 
} 

@Override 
public long getItemId(int position) { 
    return position; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ViewHolder helper = null; 
    Log.i("StaggeredGridView--Adapter:", "position:" + position); 
//  if(!viewMap.containsKey(position) || viewMap.get(position) == null){ 
    if(convertView ==null){ 
     helper = new ViewHolder(); 
     convertView = LayoutInflater.from(mContext).inflate(R.layout.item_user_details_adapter, null); 
     helper.tv_content = (EmojiconTextView) convertView.findViewById(R.id.txt_content); 
     helper.tv_time = (TextView) convertView.findViewById(R.id.txt_time); 
     helper.tv_zannum = (TextView) convertView.findViewById(R.id.tv_zan_num); 
     helper.tv_plnum = (TextView) convertView.findViewById(R.id.tv_pl_num); 
     helper.iv_show = (DynamicHeightImageView) convertView.findViewById(R.id.img_content);// 展示的图片 
     helper.img_zan = (ImageView) convertView.findViewById(R.id.img_normal);// 已经赞过的改颜色。 
     helper.rel_photo = (RelativeLayout) convertView.findViewById(R.id.rel_photo); 
     convertView.setTag(helper); 
    } else { 
     //convertView = viewMap.get(position); 
     helper = (ViewHolder) convertView.getTag(); 
    } 

    double positionHeight = getPositionRatio(position); 
    Log.d(TAG, "getView position:" + position + " h:" + positionHeight); 
    helper.iv_show.setHeightRatio(positionHeight); 
    String imgeurl = ""; 
    List<Map<String, String>> listget = mUserInfors.get(position).getmAttach(); 
    if (listget != null && listget.size() > 0) { 
     for (int i = 0; i < listget.size(); i++) { 
      Map<String, String> map = listget.get(i); 
      if (map != null) { 
       if (map.get("attach_middle") != null) { 
        imgeurl = map.get("attach_middle"); 
        if (!TextUtils.isEmpty(imgeurl)) { 
         break; 
        } 
       } 

      } 
     } 
    } 
    List<Map<String, String>> diggerlist = mUserInfors.get(position).getDigger_list(); 
    if (diggerlist.size() > 0) { 
     helper.tv_zannum.setText(diggerlist.size() + ""); 
     boolean state = getCheckstate(diggerlist); 
     if (state) { 
      helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.zan)); 
     } else { 
      helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.normalzan)); 
     } 
    } else { 
     helper.img_zan.setImageDrawable(mContext.getResources().getDrawable(R.drawable.normalzan)); 
    } 
    if (!TextUtils.isEmpty(imgeurl)) { 
     //mImageLoader2.loadImage(imgeurl,helper.iv_show, true); 
     ImageLoader.getInstance().displayImage(imgeurl, helper.iv_show, mDisplayOption); 
    } else { 
     helper.iv_show.setImageDrawable(mContext.getResources().getDrawable(R.drawable.empty_activity_icon)); 
    } 
    String content = mUserInfors.get(position).getContent(); 
    String time = mUserInfors.get(position).getCtime(); 
    helper.tv_time.setText(time.substring(5)); 
    helper.tv_zannum.setText(mUserInfors.get(position).getDigg_count()); 
    helper.tv_plnum.setText(mUserInfors.get(position).getComment_count()); 
    helper.tv_content.setText(content); 
    if (mUserInfors.get(position).getType().equals("post")) { 
     helper.rel_photo.setVisibility(View.GONE); 
     helper.tv_content.setVisibility(View.VISIBLE); 
    } else { 
     if (TextUtils.isEmpty(content)) { 
      helper.tv_content.setVisibility(View.GONE); 
     } else { 
      helper.tv_content.setVisibility(View.VISIBLE); 
     } 
     helper.rel_photo.setVisibility(View.VISIBLE); 
    } 

    return convertView; 
} 

public class ViewHolder { 
    EmojiconTextView tv_content; 
    TextView tv_time; 
    TextView tv_zannum; 
    TextView tv_plnum; 
    DynamicHeightImageView iv_show; 
    ImageView img_zan; 
    RelativeLayout rel_photo; 
} 

private double getPositionRatio(final int position) { 
    double ratio = sPositionHeightRatios.get(position, 0.0); 
    // if not yet done generate and stash the columns height 
    // in our real world scenario this will be determined by 
    // some match based on the known height and width of the image 
    // and maybe a helpful way to get the column height! 
    if (ratio == 0) { 
     ratio = getRandomHeightRatio(); 
     sPositionHeightRatios.append(position, ratio); 
     Log.d(TAG, "getPositionRatio:" + position + " ratio:" + ratio); 
    } 
    return ratio; 
} 

private double getRandomHeightRatio() { 
    return (mRandom.nextDouble()/2.0) + 1.0; // height will be 1.0 - 1.5 
               // the width 
} 

/** 得到checkbox的赞的状态 **/ 
private boolean getCheckstate(List<Map<String, String>> diggerlist) { 
    for (int i = 0; i < diggerlist.size(); i++) { 
     Map<String, String> mp = diggerlist.get(i); 
     String uid = mUser.getUid(); 
     String mUid = mp.get("uid"); 
     // 如果有就设置true。 
     if (uid.equals(mUid)) { 
      return true; 
     } 
    } 
    return false; 
} 

}