Android之自定义实现BaseAdapter（通用适配器二）

public class MyAdapter extends MyBaseAdapter {
 public MyAdapter(List data) {
  super(data);
 }
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  //获取holder持有对象
  ViewHolder holder = ViewHolder.getHolder(convertView,parent,position, R.layout.list_item);
  //获取holder对象中所有的控件
  TextView tvName = holder.getView(R.id.mTv1);
  //对控件进行操作，实现相应的方法
  TextView tvSex = holder.getView(R.id.mTv2);
  tvName.setText(data.get(position).getName());
  tvSex.setText(data.get(position).getSex());
  //返回对应的布局
  return holder.getConvertView();
 }
}

public abstract class MyBaseAdapter extends BaseAdapter {
 protected List data;
 public MyBaseAdapter (List data){
  this.data = data;
 }
 @Override
 public int getCount() {
  return data == null &＃63; 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) {
  //将相同的实现抽取到父类的这里，这里是固定的
  ViewHolder holder = ViewHolder.getHolder(convertView,parent,position, R.layout.list_item);
  //然后为子类提供一个具体实现的方法
  setData(holder,data.get(position));
  //这里也是相同的返回代码，也是固定的
  return holder.getConvertView();
 }
 //将这个方法设为抽象的，让他的子类必须去实现
 public abstract void setData(ViewHolder holder,T t);
}

public class MyAdapter extends MyBaseAdapter {
 public MyAdapter(List data) {
  super(data);
 }
 @Override
 public void setData(ViewHolder holder, Student t) {
  TextView tvName = holder.getView(R.id.mTv1);
  tvName.setText(t.getName());
  TextView tvSex = holder.getView(R.id.mTv2);
  tvSex.setText(t.getSex());
 }
}