万能ViewHolder

来源：互联网发布：电信网络卡贴编辑：程序博客网时间：2024/05/15 23:47

最近发现一个比较好的代码,就是我们常用的ViewHolder,代码如下

public class ViewHolder {    @SuppressWarnings("unchecked")    public static <T extends View> T get(View view,int id){        SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();        if(null == viewHolder){            viewHolder = new SparseArray<View>();            view.setTag(viewHolder);        }        View childView = viewHolder.get(id);        if(null == childView){            childView = view.findViewById(id);            viewHolder.put(id,childView);        }        return (T)childView;    }}

相比之前的在每个Adapter中都写个ViewHolder这个方便了很多,直接调用工具类就好了,接下来上调用代码

public class MAdapter extends BaseAdapter {    private final LayoutInflater inflater;    public MAdapter(Context context) {        inflater = LayoutInflater.from(context);    }    @Override    public int getCount() {        return 0;    }    @Override    public Object getItem(int position) {        return null;    }    @Override    public long getItemId(int position) {        return 0;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        View view = null;        if(convertView == null){            view = inflater.inflate(R.layout.item,parent,false);        }else{            view = convertView;        }        ImageView iv = ViewHolder.get(view, R.id.iv);        TextView tv = ViewHolder.get(view, R.id.tv);        iv.setImageResource(R.drawable.image1);        tv.setText("test");        return view;    }}

如此一来是不是感觉方便了很多

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