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>list = new ArrayList>();
  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++) {
      Mapmap = new HashMap();
      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<&＃63;> 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
  }

}

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

  
  

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>