/** * Created by y on 15-1-2. */public class FragmentHack4 extends Fragment{    View view;    List<String> names;    ListView lvNames;    NameSectionAdapter adapter;    TextView tvHeader;    int topVisiblePos;    @Override    public void onAttach(Activity activity) {        super.onAttach(activity);        names = new ArrayList<String>();        //测试数据        String []t={"A","B","C","D","E","F"};        for(int i=0;i<t.length;i++){            for(int j=0;j<10;j++){                names.add(t[i]+"00"+j);            }        }    }    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        view = inflater.inflate(R.layout.fragment_hack4, container,false);        tvHeader = (TextView)view.findViewById(R.id.tvHeader);        lvNames = (ListView)view.findViewById(R.id.lvNames);        adapter = new NameSectionAdapter(getActivity(),R.layout.list_name_item,names);        lvNames.setAdapter(adapter);        //设置第一个分组栏数据        setTopHeader(0);        lvNames.setOnScrollListener( lvOnScrollListener());        return view;    }    AbsListView.OnScrollListener lvOnScrollListener(){        return new AbsListView.OnScrollListener() {            @Override            public void onScrollStateChanged(AbsListView absListView, int i) {            }            @Override            public void onScroll(AbsListView absListView, int i, int i2, int i3) {                if(i!=topVisiblePos){                    topVisiblePos = i;                    setTopHeader(i);                }            }        };    }    private void setTopHeader(int pos){        tvHeader.setText(names.get(pos).substring(0,1));    }}

/** * Created by y on 15-1-2. */public class NameSectionAdapter extends ArrayAdapter<String>{    private int resourceId;    public NameSectionAdapter(Context context, int resourceId, List<String> objects){        super(context,resourceId,objects);        this.resourceId = resourceId;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        String name = getItem(position);        ViewHolder holder;        if(convertView==null){            convertView = LayoutInflater.from(getContext()).inflate(resourceId,null);            holder = new ViewHolder();            holder.tvHeader = (TextView)convertView.findViewById(R.id.tvHeader);            holder.tvName = (TextView)convertView.findViewById(R.id.tvName);           convertView.setTag(holder);        }else{            holder = (ViewHolder)convertView.getTag();        }        holder.tvName.setText(name);        //如果是第一项或者首字母发生了变化,则显示分组栏,否则隐藏        if(position==0 || getItem(position-1).charAt(0)!=name.charAt(0)){            holder.tvHeader.setVisibility(View.VISIBLE);            holder.tvHeader.setText(name.substring(0,1));        }else{            holder.tvHeader.setVisibility(View.GONE);        }        return convertView;    }    static class ViewHolder{        public TextView tvHeader;        public TextView tvName;    }}

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">    <ListView        android:id="@+id/lvNames"        android:layout_width="match_parent"        android:layout_height="match_parent"/>    <include layout="@layout/list_header"/></FrameLayout>

<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/tvHeader"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:background="#0000ff"    android:textColor="#ffffff"    style="@android:style/TextAppearance.Large"    android:textStyle="bold"/>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <include layout="@layout/list_header"/>    <TextView        android:id="@+id/tvName"        style="@android:style/TextAppearance.Small"        android:layout_width="match_parent"        android:layout_height="wrap_content" /></LinearLayout>