<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:background="@color/white_color" >

  <com.example.toolbox.upFloat.PullToRefreshListView
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    android:id="@+id/up_float_listview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:cacheColorHint="@color/white_color"
    android:divider="@color/transpant"
    android:dividerHeight="0dip"
    android:fadingEdge="none"
    android:fastScrollEnabled="false"
    android:listSelector="@color/transpant"
    android:smoothScrollbar="true"
    android:visibility="visible"
    ptr:ptrHeaderTextColor="@color/color_333333"
    ptr:ptrMode="both" />

  <include
    layout="@layout/up_float_tab_layout"
    android:visibility="gone" />

</FrameLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/up_float_tab_root"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:background="@color/white_color"
  android:minHeight="44dip"
  android:orientation="vertical" >

  <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="44dip"
    android:minHeight="44dip"
    android:orientation="horizontal" >

    <TextView
      android:id="@+id/up_fload_tab1"
      android:layout_width="0dip"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:background="@drawable/show_event_detail_tab_selector"
      android:gravity="center"
      android:text="@string/up_float_tab1"
      android:textColor="@color/show_event_detail_tab_text_selector"
      android:textSize="17sp" />

    <TextView
      android:id="@+id/up_float_tab2"
      android:layout_width="0dip"
      android:layout_height="match_parent"
      android:layout_weight="1"
      android:background="@drawable/show_event_detail_tab_selector"
      android:gravity="center"
      android:text="@string/up_float_tab2"
      android:textColor="@color/show_event_detail_tab_text_selector"
      android:textSize="17sp" />
  </LinearLayout>

  <View
    android:layout_width="match_parent"
    android:layout_height="@dimen/split_one_pixels"
    android:background="@color/color_purple_bd6aff" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:background="@color/white_color"
  android:orientation="vertical" >

  <ImageView
    android:id="@+id/show_event_detail_bg"
    android:layout_width="fill_parent"
    android:layout_height="125dip"
    android:contentDescription="@string/empty"
    android:scaleType="fitXY"
    android:src="@drawable/pic1" />

  <TextView
    android:id="@+id/show_event_detail_desc"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="24dip"
    android:layout_marginLeft="15dip"
    android:layout_marginRight="15dip"
    android:layout_marginTop="24dip"
    android:text="@string/up_float_desc"
    android:textColor="@color/color_black_333333"
    android:textSize="14sp" />

  <View style="@style/horizontal_gray_divider" />

  <View style="@style/horizontal_gray_divider" />

</LinearLayout>

package com.example.toolbox.upFloat.activity;

import java.util.ArrayList;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

import com.example.toolbox.R;
import com.example.toolbox.upFloat.PullToRefreshBase;
import com.example.toolbox.upFloat.PullToRefreshBase.OnRefreshListener2;
import com.example.toolbox.upFloat.PullToRefreshListView;

/**
 * 
 * 
 * @author sunyoujun
 * 
 */
public class UpFloatFirstActivity extends ActionBarActivity implements OnClickListener {

  public static final int TYPE_TAB_1 = 1;

  public static final int TYPE_TBA_2 = 2;

  private int tab2Pos = 0;
  private int tab2OffsetY = 0;

  private int tab1Pos = 0;
  private int tab1OffsetY = 0;

  private ArrayList<String> item = new ArrayList<String>();
  private ArrayList<String> item1 = new ArrayList<String>();
  private ArrayList<String> item2 = new ArrayList<String>();

  protected PullToRefreshListView listView;

  private LinearLayout titleView;

  private LayoutInflater infater;

  private LinearLayout titleTab;
  private LinearLayout titleFloatTab;

  private TextView latestTv;
  private TextView latestFloatTv;

  private TextView hotTv;
  private TextView hotFloatTv;

  private int currentType = TYPE_TAB_1;

  private ArrayAdapter<String> adapter;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.up_float_first_activity);
    findViews();
    setViewsListener();
    updateTabSelectState();
    initData();
    initListView();
  }

  private void findViews() {
    listView = (PullToRefreshListView) findViewById(R.id.up_float_listview);
    titleFloatTab = (LinearLayout) findViewById(R.id.up_float_tab_root);
    latestFloatTv = (TextView) titleFloatTab.findViewById(R.id.up_float_tab2);
    hotFloatTv = (TextView) titleFloatTab.findViewById(R.id.up_fload_tab1);

    infater = LayoutInflater.from(this);
    titleView = (LinearLayout) infater.inflate(R.layout.up_float_common_layout, null);

    titleTab = (LinearLayout) infater.inflate(R.layout.up_float_tab_layout, null);
    latestTv = (TextView) titleTab.findViewById(R.id.up_float_tab2);
    hotTv = (TextView) titleTab.findViewById(R.id.up_fload_tab1);
  }

  private void setViewsListener() {
    latestTv.setOnClickListener(this);
    hotTv.setOnClickListener(this);
    latestFloatTv.setOnClickListener(this);
    hotFloatTv.setOnClickListener(this);
    updateTabSelectState();
  }

  /**
   * 更新tab栏选中状态
   */
  private void updateTabSelectState() {
    boolean isTab1 = (currentType == TYPE_TAB_1);
    hotTv.setSelected(isTab1);
    hotFloatTv.setSelected(isTab1);
    latestTv.setSelected(!isTab1);
    latestFloatTv.setSelected(!isTab1);
  }

  private void initData() {
    for (int i = 1; i <= 50; i++) {
      item1.add("tab1-- item ---" + i);
      item2.add("tab2-- item ---" + i);
    }
  }

  private void initListView() {
    setListViewListener();
    listViewAddHeader();
    listViewLoadData();
  }

  private void setListViewListener() {
    listView.setOnRefreshListener(new OnRefreshListener2<ListView>() {

      @Override
      public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
        // loadNews();
      }

      @Override
      public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
        // loadOlds();
      }

    });

    listView.setOnScrollListener(new OnScrollListener() {

      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState) {
      }

      @Override
      public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        if (firstVisibleItem < 2) {// 悬浮tab出现时机，listview含有三个header
          titleFloatTab.setVisibility(View.GONE);
        } else
          titleFloatTab.setVisibility(View.VISIBLE);
        ;
      }
    });
  }

  private void listViewAddHeader() {
    listView.getRefreshableView().addHeaderView(titleView);
    listView.getRefreshableView().addHeaderView(titleTab);
  }

  protected void listViewLoadData() {
    item.clear();
    item.addAll(item1);
    adapter = new ArrayAdapter<String>(this, R.layout.list_item, android.R.id.text1, item);
    listView.setAdapter(adapter);
  }

  @Override
  public void onClick(View v) {
    switch (v.getId()) {
    case R.id.up_fload_tab1:
      switchTabtList(true);
      break;
    case R.id.up_float_tab2:
      switchTabtList(false);
      break;
    default:
      break;
    }
  }

  private void switchTabtList(boolean isTab1) {
    if (isTab1) {
      if (currentType == TYPE_TAB_1) {
        return;// 说明点击的是相同的活动列表，不用改变
      } else {// tab2 switch tab1
        tab2Pos = listView.getRefreshableView().getFirstVisiblePosition();
        tab2OffsetY = getOffsetY();
        currentType = TYPE_TAB_1;
        item2.clear();
        item2.addAll(item);
        item.clear();
        item.addAll(item1);
      }
    } else {
      if (currentType == TYPE_TBA_2) {
        return;
      } else {// tab1 switch tab2
        tab1Pos = listView.getRefreshableView().getFirstVisiblePosition();
        tab1OffsetY = getOffsetY();
        currentType = TYPE_TBA_2;
        item1.clear();
        item1.addAll(item);
        item.clear();
        item.addAll(item2);
      }
    }
    updateTabSelectState();
    relocationLastPos();
  }

  private int getOffsetY(){
    View view = listView.getRefreshableView().getChildAt(0);
    return view != null ? view.getTop() : 0;
  }

  /**
   * 重新定位到上次的位置
   */
  private void relocationLastPos() {
    if (adapter != null) {
      adapter.notifyDataSetChanged();
    }
    if (currentType == TYPE_TAB_1) {
      listView.post(new Runnable() {

        @Override
        public void run() {
          listView.getRefreshableView().setSelectionFromTop(tab1Pos, tab1OffsetY);
        }
      });
    } else {
      listView.post(new Runnable() {

        @Override
        public void run() {
          listView.getRefreshableView().setSelectionFromTop(tab2Pos, tab2OffsetY);
        }
      });
    }
  }

}