自定义BaseAdapter

自定义一个类继承自BaseAdapter，将一些Adapter中相同的方法封装到自定义类中，在写Adapter的时候直接继承自这个自定义类

 

public abstract classMyBaseAdapter<T> extends BaseAdapter {

       protectedContext context;

       protectedLayoutInflater inflater;

       protectedArrayList<T> myList=new ArrayList<T>();

      

       publicMyBaseAdapter(Context context){

              this.context=context;

              this.inflater=LayoutInflater.from(context);

       }

       //封装加数据的方法--1条 多条    

       publicvoid appendData(T t,boolean isClearOld){

              if(t==null)

                     return;

              if(isClearOld)

                     myList.clear();

              myList.add(t);

       }

       publicvoid appendData(ArrayList<T> data,boolean isClearOld){

              if(data==null)

                     return;

              if(isClearOld)

                     myList.clear();

              myList.addAll(data);

       }

       //封装加数据的方法--1条 多条    在顶部添加

       publicvoid appendDataTop(T t,boolean isClearOld){

              if(t==null)

                     return;

              if(isClearOld)

                     myList.clear();

              myList.add(0,t);

       }

       publicvoid appendDataTop(ArrayList<T> data,boolean isClearOld){

              if(data==null)

                     return;

              if(isClearOld)

                     myList.clear();

              myList.addAll(0,data);

       }

      

       publicvoid update(){

              this.notifyDataSetChanged();

       }

      

       publicvoid clear(){

              myList.clear();

       }

      

 

       publicint getCount() {

              if(myList==null)

                     return0;

              returnmyList.size();

       }

 

       publicT getItem(int position) {

              if(myList==null)

                     returnnull;

              if(position>myList.size()-1)

                     returnnull;

              returnmyList.get(position);

       }

 

       publiclong getItemId(int position) {

              returnposition;

       }

 

       publicView getView(int position, View convertView, ViewGroup parent) {

              returngetMyView(position, convertView, parent);

       }

       publicabstract View getMyView(int position, View convertView, ViewGroup parent);

      

}