查看持有人和自定义列表查看项目滚动时滚动

我知道有很多类似的问题，但我找不到我犯的错误，如果有人可以帮助。我试图想聊天格式，但数组列表项的数组列表中显示的值上滚动查看持有人和自定义列表查看项目滚动时滚动

@Override 
     public View getView(int position, View convertView, ViewGroup parent) { 

      final ViewHolder holder; 
      if (convertView == null) { 

       convertView = LayoutInflater.from(getActivity()).inflate(
         R.layout.chat_row, parent, false); 
       holder = new ViewHolder(); 
    holder.messageLeft = (TextView) convertView 
        .findViewById(R.id.leftBox); 
      holder.messageRight = (TextView) convertView 
        .findViewById(R.id.rightBox); 
     convertView.setTag(holder); 

      } else { 
       holder = (ViewHolder) convertView.getTag(); 
      } 

      try { if (snd_id.get(position).equalsIgnoreCase(appPref.getData("Uid"))) { 
       holder.messageLeft.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
       holder.messageLeft.setVisibility(View.VISIBLE); 
       holder.messageRight.setVisibility(View.GONE); 
      } else { 
       holder.messageRight.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
       holder.messageRight.setVisibility(View.VISIBLE); 
       holder.messageLeft.setVisibility(View.GONE); 
      } 
      } catch (Exception e) { 
       e.printStackTrace(); 
      } 

      return convertView; 

     }

这里越来越错位的是视图holder类

private static class ViewHolder { 
     public TextView messageLeft; 
     public TextView messageRight; 
    }

来源

2014-03-03 George Thomas

高效和正确的方法，我甲肝编辑现在工作的菲英岛问题....感谢所有乌拉圭回合支持 –

只需在您的if-else声明holder.messageRight.setVisibility(View.GONE);和holder.messageLeft.setVisibility(View.GONE);。

try { 
     if (snd_id.get(position).equalsIgnoreCase(appPref.getData("Uid"))) { 
      holder.messageLeft.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
      holder.messageLeft.setVisibility(View.VISIBLE); 
      holder.messageRight.setVisibility(View.GONE); 
     } else { 
      holder.messageRight.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
      holder.messageRight.setVisibility(View.VISIBLE); 
      holder.messageLeft.setVisibility(View.GONE); 
     }

让我知道它是否适用于您。

来源

2014-03-03 07:49:51 user370305

谢谢你现在完美...... –

您pefroming findViewById每次.. ViewHolder的目的不是像that..Change你if-else条件是这样，并尝试..

if (convertView == null) { 

     convertView = LayoutInflater.from(getActivity()).inflate(
       R.layout.chat_row, parent, false); 
     holder = new ViewHolder(); 
     holder.messageLeft = (TextView) convertView 
      .findViewById(R.id.leftBox); 
     holder.messageRight = (TextView) convertView 
      .findViewById(R.id.rightBox); 
     convertView.setTag(holder); 
    } else { 
     holder = (ViewHolder) convertView.getTag(); 
    }

和删除

convertView.setTag(holder);

底部

来源

2014-03-03 07:48:10

它没有帮助有同样的效果 –

发生了什么的当滚动 –

雅我做了更正你告诉，并执行什么user370305告诉，现在它的作品fyn –

@Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     final ViewHolder holder; 
     if (convertView == null) { 

      convertView = LayoutInflater.from(getActivity()).inflate(
        R.layout.chat_row, parent, false); 
      holder = new ViewHolder(); 
holder.messageLeft = (TextView) convertView 
       .findViewById(R.id.leftBox); 
     holder.messageRight = (TextView) convertView 
       .findViewById(R.id.rightBox); 
    convertView.setTag(holder); 

     } else { 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     try { 
      if (snd_id.get(position).equalsIgnoreCase(appPref.getData("Uid"))) { 
       holder.messageLeft.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
       holder.messageLeft.setVisibility(View.VISIBLE); 
      } else { 
       holder.messageRight.setText(snd_name.get(position)+":"+"\n"+chat.get(position)); 
       holder.messageRight.setVisibility(View.VISIBLE); 
      } 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 

     return convertView; 

    }

这是使用viewholder

来源

2014-03-03 07:50:19 Bharat

查看持有人和自定义列表查看项目滚动时滚动

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