优化SimpleAdapter适配器加载效率的方法

在主Activity中：

listview=(ListView)findViewById(R.id.listview);getData();

//为list添加数据overrideSimpleAdapter=new OverrideSimpleAdapter(getContext(),list,R.layout.list_item_layout,

new String[]{"num","word","translates"},

new int[]{R.id.tv_num,R.id.tv_word,R.id.tv_translates});

listview.setAdapter(overrideSimpleAdapter);

重写SimpleAdapter:

public class OverrideSimpleAdapter extends SimpleAdapter {
  

  private LayoutInflater mInflater;
  private ArrayList> list;
  private int mResource;
  private int[] mTo;
  private String[] mFrom;

  public OverrideSimpleAdapter(Context context, ArrayList> data, int resource, String[] from, int[] to) {
    super(context, data, resource, from, to);
    this.list=data;
    this.mInflater = LayoutInflater.from(context);
    this.mResource = resource;
    this.mFrom = from;
    this.mTo = to;
  }

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

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

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

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    // 判断是否缓存
    if (convertView == null) {
      holder = new ViewHolder();
      // 通过LayoutInflater实例化布局
      convertView = mInflater.inflate(mResource, null);
//      holder.img = (ImageView) convertView.findViewById(R.id.imageView);
      holder.num = (TextView) convertView.findViewById(mTo[0]);
      holder.word = (TextView) convertView.findViewById(mTo[1]);
      holder.translates = (TextView) convertView.findViewById(mTo[2]);
      convertView.setTag(holder);
    } else {
      // 通过tag找到缓存的布局
      holder = (ViewHolder) convertView.getTag();
    }
    // 设置布局中控件要显示的视图
//    holder.img.setBackgroundResource(R.drawable.ic_launcher);
    holder.num.setText(list.get(position).get(mFrom[0]).toString());// mFrom[0]为“num”Key
    holder.word.setText(list.get(position).get(mFrom[1]).toString());
    holder.translates.setText(list.get(position).get(mFrom[2]).toString());
    return convertView;
  }

  public final class ViewHolder {
//    public ImageView img;
    public TextView num;
    public TextView word;
    public TextView translates;
  }
}

以上这篇优化SimpleAdapter适配器加载效率的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持考高分网。