listview的上滑下滑监听,上下滑监听隐藏顶部选项栏的实例

package com.example.android_topbar_gone;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewConfiguration;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
private RelativeLayout top_rl;
private ListView listview;
private List<Map<String, Object  list = new ArrayList<Map<String,Object  ();
private int mTouchShop;//最小滑动距离
protected float mFirstY;//触摸下去的位置
protected float mCurrentY;//滑动时Y的位置
protected int direction;//判断是否上滑或者下滑的标志
protected boolean mShow;//判断是否执行了上滑动画
private Animator mAnimator;//动画属性
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化id
setViews();
//加载listview
setListView();
}
/**
* 初始化id
*/
private void setViews() {
top_rl = (RelativeLayout) findViewById(R.id.rl_ttt);
listview = (ListView) findViewById(R.id.listview);
}
/**
* 加载listview
*/
private void setListView() {
View header = View.inflate(this, R.layout.headview, null);//自定义一个头布局和顶部执行动画的布局等高就行
listview.addHeaderView(header);//加载头布局
//获得一个最小滑动距离
mTouchShop = ViewConfiguration.get(this).getScaledTouchSlop();//系统级别的一个属性,判断用户的最小滑动距离的,可查看源码为16
//给集合添加数据
for (int i = 0; i < 40; i++) {
Map<String, Object map = new HashMap<String, Object ();
map.put("str", "第"+i+"个item");
list.add(map);
}
String a[] = {"str"};
int b[] = {R.id.tv01};
//simpleadapter加载集合数据
SimpleAdapter adapter = new SimpleAdapter(this, list, R.layout.item, a, b);
listview.setAdapter(adapter);
listview.setOnItemClickListener(new OnItemClickListener() {//listview的点击方法
@Override
public void onItemClick(AdapterView<?  arg0, View arg1, int arg2,
long arg3) {
Toast.makeText(MainActivity.this, list.get(arg2-1).get("str")+"", 0).show();//-1是因为加载的头布局
}
});
listview.setOnTouchListener(new OnTouchListener() {//listview的触摸事件
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mFirstY = event.getY();//按下时获取位置
break;
case MotionEvent.ACTION_MOVE:
mCurrentY = event.getY();//得到滑动的位置
if(mCurrentY - mFirstY   mTouchShop){//滑动的位置减去按下的位置大于最小滑动距离 则表示向下滑动
direction = 0;//down
}else if(mFirstY - mCurrentY   mTouchShop){//反之向上滑动
direction = 1;//up
}
if(direction == 1){//判断如果是向上滑动 则执行向上滑动的动画
if(mShow){//判断动画是否执行了 执行了则改变状态
//执行往上滑动的动画
tolbarAnim(1);
mShow = !mShow;
}
}else if(direction == 0){//判断如果是向下滑动 则执行向下滑动的动画
if(!mShow){//判断动画是否执行了 执行了则改变状态
//执行往下滑动的动画
tolbarAnim(0);
mShow = !mShow;
}
}
break;
case MotionEvent.ACTION_UP:
break;
}
return false;
}
});
}
private void tolbarAnim(int flag){
if(mAnimator != null && mAnimator.isRunning()){//判断动画存在 如果启动了,则先关闭
mAnimator.cancel();
}
if(flag == 0){
mAnimator = ObjectAnimator.ofFloat(top_rl, "translationY", top_rl.getTranslationY(),0);//从当前位置位移到0位置
}else{
mAnimator = ObjectAnimator.ofFloat(top_rl, "translationY", top_rl.getTranslationY(),-top_rl.getHeight());//从当前位置移动到布局负高度的wiz
}
mAnimator.start();//执行动画
}
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"  
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@null"
android:divider="@null"
android:listSelector="@android:color/transparent"
android:scrollbars="@null"  
</ListView 
<RelativeLayout 
android:id="@+id/rl_ttt"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#39caab"
</RelativeLayout 
</RelativeLayout 

<?xml version="1.0" encoding="utf-8"? 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"  
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"  
</RelativeLayout 
</RelativeLayout 

<?xml version="1.0" encoding="utf-8"? 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"  
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#eeeeee"  
<TextView
android:id="@+id/tv01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="18dp"
android:text="第一个item"
android:textColor="#646464"
android:textSize="14dp" / 
<TextView
android:layout_width="match_parent"
android:layout_height="0.5dp"
android:layout_alignParentBottom="true"
android:background="#d2d2d2" / 
</RelativeLayout 
</RelativeLayout