Android：使用CustomAdapter填充ListView

我想使用擴展BaseAdapter的CustomAdapter創建ListView。我有CustomAdapter(Context context, List<Map<String, String>> dataList)。Android：使用CustomAdapter填充ListView

如何從Map獲取數據並在getView()方法中設置我的視圖？在我嘗試使用SimpleAdapter之前，我需要設置存儲在SD上的位圖，以及存儲在地圖中的圖像的路徑。每一個幫助表示讚賞。

這裏是我的CustomAdapter來源：

public class CustomAdapter extends BaseAdapter { 

private Context context; 
private String pricePrecision = null; 
private List<Map<String, String>> data; 

public CustomAdapter(Context context, List<Map<String, String>> data) { 
    super(); 
    this.context = context; 
    this.data = data; 
} 

@Override 
public int getCount() { 
    return (data == null) ? 0 : data.size(); 
} 

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

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

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

    ViewHolder viewHolder = null; 
    LayoutInflater inflater = ((LayoutInflater) context 
      .getSystemService(Context.LOCATION_SERVICE)); 
    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.order_list_item, null); 

     viewHolder = new ViewHolder(); 
     viewHolder.itemThumbnail = ((ImageView) convertView 
       .findViewById(R.id.ivItemThumb)); 
     viewHolder.itemName = ((TextView) convertView 
       .findViewById(R.id.tvItemName)); 
     viewHolder.itemPrice = ((TextView) convertView 
       .findViewById(R.id.tvItemPrice)); 
     convertView.setTag(viewHolder); 

    } else { 
     viewHolder = ((ViewHolder) convertView.getTag()); 
    } 
    return null; 
} 

private class ViewHolder { 
    private ImageView itemThumbnail; 
    private TextView itemName; 
    private TextView itemPrice; 
}

}

來源

2013-01-07 Martin

post CustomAdapter代碼 –

我編輯了我的問題。有我的來源。 – Martin

只是想確認你有地圖或位圖中的圖像路徑？ –

更改getView方法：

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

    ViewHolder viewHolder = null; 
    LayoutInflater inflater = ((LayoutInflater) context 
      .getSystemService(Context.LOCATION_SERVICE)); 
    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.order_list_item, null); 

     viewHolder = new ViewHolder(); 
     viewHolder.itemThumbnail = ((ImageView) convertView 
       .findViewById(R.id.ivItemThumb)); 
     viewHolder.itemName = ((TextView) convertView 
       .findViewById(R.id.tvItemName)); 
     viewHolder.itemPrice = ((TextView) convertView 
       .findViewById(R.id.tvItemPrice)); 
     convertView.setTag(viewHolder); 

    } else { 
     viewHolder = ((ViewHolder) convertView.getTag()); 
    } 
    viewHolder.itemThumbnail.setImageBitmap(data.get(position).get("thumbnail")); 
    viewHolder.itemName.setText(data.get(position).get("name")); 
    viewHolder.itemPrice.setText(""+data.get(position).get("price")); 
    return viewHolder; 
} 

private class ViewHolder { 
    private ImageView itemThumbnail; 
    private TextView itemName; 
    private TextView itemPrice; 
}

來源

2013-01-07 16:09:34

謝謝四位幫忙。這非常有用。你真的幫助了我。 – Martin

有點除（ρяσѕρєяK）的代碼。您可能想要在縮略圖上設置偵聽器。

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

    ViewHolder viewHolder = null; 
    LayoutInflater inflater = ((LayoutInflater) context 
      .getSystemService(Context.LOCATION_SERVICE)); 
    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.order_list_item, null); 

     viewHolder = new ViewHolder(); 
     viewHolder.itemThumbnail = ((ImageView) convertView 
       .findViewById(R.id.ivItemThumb)); 
     viewHolder.itemName = ((TextView) convertView 
       .findViewById(R.id.tvItemName)); 
     viewHolder.itemPrice = ((TextView) convertView 
       .findViewById(R.id.tvItemPrice)); 

     viewHolder.itemThumbnail.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 

      } 
     }); 

     convertView.setTag(viewHolder); 

    } else { 
     viewHolder = ((ViewHolder) convertView.getTag()); 
    } 
    viewHolder.itemThumbnail.setImageBitmap(data.get(position).get(
      "thumbnail")); 
    viewHolder.itemName.setText(data.get(position).get("name")); 
    viewHolder.itemPrice.setText("" + data.get(position).get("price")); 
    return viewHolder; 
} 

private class ViewHolder { 
    private ImageView itemThumbnail; 
    private TextView itemName; 
    private TextView itemPrice; 
}

來源

2013-01-07 16:15:17

Android：使用CustomAdapter填充ListView

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