public abstract class  AbstractBaseAdapter
    
      extends BaseAdapter {    List
     
       data = new ArrayList
      
       ();    @Override    public int getCount() {        if(data!=null){            return data.size();        }else {            return 0;        }    }    @Override    public Object getItem(int i) {        return data.get(i);    }    @Override    public long getItemId(int i) {        return i;    }    public void clear(){        if(data!= null) {            data.clear();        }    }    public void add(T d) {        if (d != null&&data!=null) {            data.add(d);        }    }    public void addAll(List
       
        ds) {        if (ds != null&&data!=null) {            data.addAll(ds);        }    }    public void remove(int index){        if(data!=null&&data.size()>index&&index>=0){            data.remove(index);        }    }}
       
      
     
    

View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_file_list, parent, false);

compile 'com.android.support:recyclerview-v7:23.1.1'public abstract class AbstractRecycleViewAdapter
    
      extends RecyclerView.Adapter {    List
     
       data = new ArrayList
      
       ();    public void clear(){        if(data!= null) {            data.clear();        }    }    public void add(T d) {        if (d != null&&data!=null) {            data.add(d);        }    }    public void addAll(List
       
        ds) {        if (ds != null&&data!=null) {            data.addAll(ds);        }    }    public T get(int index){        if(data != null&&data.size()>index&&index>=0){            return data.get(index);        }else{            return null;        }    }    public void remove(int index){        if(data!=null&&data.size()>index&&index>=0){            data.remove(index);        }    }    @Override    public int getItemCount() {        if(data!=null){            return data.size();        }else {            return 0;        }    }}
       
      
     
    

LinearLayoutManager llm = new LinearLayoutManager(getActivity());        llm.setOrientation(LinearLayoutManager.VERTICAL);