public?View?getView(int?position,?View?convertView,?ViewGroup?parent)?{
????ViewHolder?holder;
????if?(convertView?==?null)?{
????????View?view?=?inflater.inflate(R.layout.item,null);
????????holder?=?new?ViewHolder();
????????holder.item_content?=?(TextView)?view.findViewById(R.id.item_content);
????????holder.item_title?=?(TextView)?view.findViewById(R.id.item_title);
????????holder.item_icon?=?(ImageView)?view.findViewById(R.id.item_icon);
????????convertView.setTag(holder);
????}?else?{
????????holder?=?(ViewHolder)?convertView.getTag();
????}
????holder.item_icon.setImageResource(R.mipmap.ic_launcher);
????holder.item_title.setText(mListData.get(position).newsTitle);
????holder.item_content.setText(mListData.get(position).newsContent);

????return?convertView;
}

java.lang.NullPointerException

? ? ? ? ? ? at com.jeff.asynctaskdemo2.NewsAdapter.getView(NewsAdapter.java:50)

也就是 ?convertView.setTag(holder); ??這里報錯了