ListView下拉刷新和PullToRefreshListView实现

下拉刷新-------
   1.addHeaderView必须在setAdapter之前调用
   2.将paddingTop设置一个headerView高度的负值去隐藏它

   getHeight()和getMeasuredHeight()的区别：
   getMeasuredHeight():获取测量完的高度，只要在onMeasure方法执行完，就可以用
                        它获取到宽高，在自定义控件内部多使用这个
                       使用view.measure(0,0)方法可以主动通知系统去测量，然后就
                       可以直接使用它获取宽高
   getHeight()：必须在onLayout方法执行完后，才能获得宽高
               view.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                   @Override
                   public void onGlobalLayout() {
                   headerView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                   int headerViewHeight = headerView.getHeight();
                   //直接可以获取宽高
           }
       });
   3.setSelection(position);将对应位置的item放置到屏幕顶端

4. 有时listview在滑动的时候背景会变黑，这是Listview默认的背景色可以将其默认背景色改成白色的 android:cacheColorHint="#fff"

其中headerView的布局文件

<?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:gravity="center_horizontal"

    android:orientation="horizontal" >

    <RelativeLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginBottom="10dp"

        android:layout_marginTop="10dp" >

        <ImageView

            android:id="@+id/iv_arrow"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="@drawable/indicator_arrow"

            android:contentDescription="@null" />

        <ProgressBar

            android:id="@+id/pb_rotate"

            android:layout_width="30dp"

            android:layout_height="30dp"

            android:visibility="invisible"

            android:layout_centerInParent="true"

            android:indeterminateDrawable="@drawable/indeterminate_drawable"

            android:indeterminateDuration="2000" />

    </RelativeLayout>

    <LinearLayout

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginBottom="10dp"

        android:layout_marginLeft="15dp"

        android:layout_marginTop="10dp"

        android:gravity="center"

        android:orientation="vertical" >

        <TextView

            android:id="@+id/tv_state"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="下拉刷新"

            android:textColor="#aa000000"

            android:textSize="20sp" />

        <TextView

            android:id="@+id/tv_time"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="最后刷新："

            android:textColor="@android:color/darker_gray"

            android:textSize="14sp" />

    </LinearLayout>

</LinearLayout>

其中footerView的布局文件

<?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:gravity="center"

    android:orientation="horizontal" >

    <ProgressBar

        android:layout_width="30dp"

        android:layout_height="30dp"

        android:layout_marginTop="10dp"

        android:layout_marginBottom="10dp"

        android:indeterminate="true"

        android:indeterminateDrawable="@drawable/indeterminate_drawable"

        android:indeterminateDuration="1000" />

    <TextView android:layout_width="wrap_content"

        android:layout_marginTop="10dp"

        android:layout_marginBottom="10dp"

        android:layout_height="wrap_content"

        android:textColor="#aa000000"

        android:layout_marginLeft="15dp"

        android:textSize="20sp"

        android:text="加载更多..."/>

</LinearLayout>

android:indeterminateDrawable="@drawable/indeterminate_drawable"

<?xml version="1.0" encoding="utf-8"?>

<rotate xmlns:android="http://schemas.android.com/apk/res/android"

    android:fromDegrees="0"

    android:pivotX="50%"

    android:pivotY="50%"

    android:drawable="@drawable/indicate_rotate"

    android:toDegrees="360">

</rotate>

RefreshListView的主代码

package com.demo.pullrefresh.view;

import java.text.SimpleDateFormat;

import java.util.Date;

import com.demo.pullrefresh.R;

import android.annotation.SuppressLint;

import android.content.Context;

import android.util.AttributeSet;

import android.util.Log;

import android.view.MotionEvent;

import android.view.View;

import android.view.animation.RotateAnimation;

import android.widget.AbsListView;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.ProgressBar;

import android.widget.TextView;

import android.widget.AbsListView.OnScrollListener;

public class RefreshListView extends ListView implements OnScrollListener {

    private View headerView;// headerView

    private ImageView iv_arrow;

    private ProgressBar pb_rotate;

    private TextView tv_state, tv_time;

    private int downY;// 按下时y的坐标

    private int headerViewHeight;// headerView高

    private View footerView;

    private int footerViewHeight;

    private final int PULL_REFRESH = 0;// 下拉刷新的状态

    private final int RELEASE_REFRESH = 1;// 松开刷新的状态

    private final int REFRESHING = 2;// 正在刷新的状态

    private int currentState = PULL_REFRESH;// headerView的默认位置

    private RotateAnimation upAnimation, downAnimation;

    private boolean isLoadingMore = false;// 当前是否正在处于加载更多

    public RefreshListView(Context context) {

        super(context);

        init();

    }

    public RefreshListView(Context context, AttributeSet attrs) {

        super(context, attrs);

        init();

    }

    private void init() {

        setOnScrollListener(this);

        initHeaderView();

        initFooterView();

        initRotateAnimation();

    }

    /**

     * 初始化headerView

     */

    private void initHeaderView() {

        headerView = View.inflate(getContext(), R.layout.layout_header, null);

        // headerView

        // =LayoutInflater.from(getContext()).inflate(R.layout.layout_header,

        // null);

        iv_arrow = (ImageView) headerView.findViewById(R.id.iv_arrow);

        pb_rotate = (ProgressBar) headerView.findViewById(R.id.pb_rotate);

        tv_state = (TextView) headerView.findViewById(R.id.tv_state);

        tv_time = (TextView) headerView.findViewById(R.id.tv_time);

        // 第一种方法

        // headerView.getViewTreeObserver().addOnGlobalLayoutListener(new

        // OnGlobalLayoutListener() {

        // @Override

        // public void onGlobalLayout() {

        // headerView.getViewTreeObserver().removeGlobalOnLayoutListener(this);

        // int headerViewHeight = headerView.getHeight();

        //

        //

        // Log.e("MainActivity", "headerViewHeight: "+headerViewHeight);

        // headerView.setPadding(0, -headerViewHeight, 0, 0);

        // refreshListView.addHeaderView(headerView);//

        // }

        // });

        // 第二种方法

        headerView.measure(0, 0);// 主动通知系统去测量

        headerViewHeight = headerView.getMeasuredHeight();

        Log.e("MainActivity", "headerViewHeight: " + headerViewHeight);

        headerView.setPadding(0, -headerViewHeight, 0, 0);

        addHeaderView(headerView);//

    }

    /**

     * 初始化旋转动画

     */

    private void initRotateAnimation() {

        upAnimation = new RotateAnimation(0, -180,

                RotateAnimation.RELATIVE_TO_SELF, 0.5f,

                RotateAnimation.RELATIVE_TO_SELF, 0.5f);

        upAnimation.setDuration(300);

        upAnimation.setFillAfter(true);

        downAnimation = new RotateAnimation(-180, -360,

                RotateAnimation.RELATIVE_TO_SELF, 0.5f,

                RotateAnimation.RELATIVE_TO_SELF, 0.5f);

        downAnimation.setDuration(300);

        downAnimation.setFillAfter(true);

    }

    /**

     * 初始化footerView

     */

    private void initFooterView() {

        footerView = View.inflate(getContext(), R.layout.layout_footer, null);

        footerView.measure(0, 0);// 主动通知系统去测量该View

        footerViewHeight = footerView.getMeasuredHeight();

        footerView.setPadding(0, -footerViewHeight, 0, 0);

        addFooterView(footerView);

    }

    @Override

    public boolean onTouchEvent(MotionEvent ev) {

        switch (ev.getAction()) {

        case MotionEvent.ACTION_DOWN:

            downY = (int) ev.getY();

            break;

        case MotionEvent.ACTION_MOVE:

            int deltaY = (int) (ev.getY() - downY);

            int paddingTop = -headerViewHeight + deltaY;

            if (paddingTop > -headerViewHeight

                    && getFirstVisiblePosition() == 0) {

                headerView.setPadding(0, paddingTop, 0, 0);

                Log.d("jiejie", "paddingtop" + paddingTop);

                if (paddingTop >= 0 && currentState == PULL_REFRESH) {

                    // 从下拉刷新进入松开刷新的状态

                    currentState = RELEASE_REFRESH;

                    refreshHeaderView();

                } else if (paddingTop < 0 && currentState == RELEASE_REFRESH) {

                    // 进入下拉刷新的状态

                    currentState = PULL_REFRESH;

                    refreshHeaderView();

                }

                return true;// 拦截TouchMove,不让ListView处理该次move事件，不过会造成ListView无法滑动

            }

            break;

        case MotionEvent.ACTION_UP:

            if (currentState == PULL_REFRESH) {

                // 隐藏headerView

                headerView.setPadding(0, -headerViewHeight, 0, 0);

            } else if (currentState == RELEASE_REFRESH) {

                headerView.setPadding(0, 0, 0, 0);

                currentState = REFRESHING;

                refreshHeaderView();

                if (listener != null) {

                    listener.onPullRefersh();

                }

            }

            break;

        }

        return super.onTouchEvent(ev);

    }

    /**

     * 根据currentState来更新headerView

     */

    private void refreshHeaderView() {

        switch (currentState) {

        case PULL_REFRESH:

            tv_state.setText("下拉刷新");

            iv_arrow.startAnimation(downAnimation);

            break;

        case RELEASE_REFRESH:

            tv_state.setText("松开刷新");

            iv_arrow.startAnimation(upAnimation);

            break;

        case REFRESHING:

            iv_arrow.clearAnimation();// 因为向上的旋转动画有可能没有执行完

            iv_arrow.setVisibility(View.INVISIBLE);

            pb_rotate.setVisibility(View.VISIBLE);

            tv_state.setText("正在刷新...");

            break;

        }

    }

    /**

     * 完成刷新操作，重置状态,在你获取完数据并更新完adater之后，去在UI线程中调用该方法

     */

    public void completeRefresh() {

        if (isLoadingMore) {

            // 重置footerView状态

            footerView.setPadding(0, -footerViewHeight, 0, 0);

            isLoadingMore = false;

        } else {

            // 重置headerView状态

            headerView.setPadding(0, -headerViewHeight, 0, 0);

            currentState = PULL_REFRESH;

            pb_rotate.setVisibility(View.INVISIBLE);

            iv_arrow.setVisibility(View.VISIBLE);

            tv_state.setText("下拉刷新");

            tv_time.setText("最后刷新：" + getCurrentTime());

        }

    }

    /**

     * 取得当前系统的时间，并格式化

     */

    @SuppressLint("SimpleDateFormat")

    private String getCurrentTime() {

        SimpleDateFormat format = new SimpleDateFormat("yy-MM-dd HH:mm:ss");

        return format.format(new Date());

    }

    private OnRefreshListener listener;

    public void setOnRefreshListener(OnRefreshListener listener) {

        this.listener = listener;

    }

    public interface OnRefreshListener {

        void onPullRefersh();

        void onLoadingMore();

    }

    /**

     * SCROLL_STATE_IDLE:闲置状态，就是手指松开 SCROLL_STATE_TOUCH_SCROLL：手指触摸滑动，就是按着来滑动

     * SCROLL_STATE_FLING：快速滑动后松开

     */

    @Override

    public void onScroll(AbsListView view, int firstVisibleItem,

            int visibleItemCount, int totalItemCount) {

        // TODO Auto-generated method stub

    }

    @Override

    public void onScrollStateChanged(AbsListView view, int scrollState) {

        if (scrollState == OnScrollListener.SCROLL_STATE_IDLE

                && getLastVisiblePosition() == (getCount() - 1)

                && !isLoadingMore) {

            isLoadingMore = true;

            footerView.setPadding(0, 0, 0, 0);// 显示footerView

            setSelection(getCount());// 让ListView的最后一条显示出来

            if (listener != null) {

                listener.onLoadingMore();

            }

        }

    }

}

MainActivity的主代码

package com.demo.pullrefresh;

import java.util.ArrayList;

import java.util.List;

import com.demo.pullrefresh.view.RefreshListView;

import com.demo.pullrefresh.view.RefreshListView.OnRefreshListener;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.os.SystemClock;

import android.util.Log;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.BaseAdapter;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity implements OnItemClickListener {

    private RefreshListView refreshListView;

    private MyAdapter adapter;

    private List<String> list ;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        initView();

        initData();

    }

    private void initView() {

        // TODO Auto-generated method stub

        // requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.mainactivity);

        refreshListView = (RefreshListView) findViewById(R.id.rf_mainlistview);

    }

    private void initData() {

        list = new ArrayList<String>();

        for (int i = 0; i < 30; i++) {

            list.add("ListView原来的数据——   " + i);

        }

        adapter = new MyAdapter();

        refreshListView.setAdapter(adapter);

        refreshListView.setOnRefreshListener(new OnRefreshListener() {

            @Override

            public void onPullRefersh() {

                // TODO Auto-generated method stub

                // 需要联网请求服务器的数据，然后更新UI

                requestDataFromServer(false);

            }

            @Override

            public void onLoadingMore() {

                // TODO Auto-generated method stub

                requestDataFromServer(true);

            }

        });

        refreshListView.setOnItemClickListener(this);

    }

    @SuppressLint("HandlerLeak")

    private Handler handler = new Handler() {

        @Override

        public void handleMessage(Message msg) {

            // 跟新UI

            adapter.notifyDataSetChanged();

            refreshListView.completeRefresh();

        }

    };

    /**

     * 模拟向服务器请求数据

     *

     * @param isLoadingMore

     */

    private void requestDataFromServer(final boolean isLoadingMore) {

        new Thread() {

            public void run() {

                SystemClock.sleep(3000);// 模拟请求服务器的一个时间长度

                Log.d("jiejie", isLoadingMore + "");

                if (isLoadingMore) {

                    list.add("加载了更多的数据  ————1");

                    list.add("加载了更多的数据  ————2");

                    list.add("加载了更多的数据  ————3");

                } else {

                }

                handler.sendEmptyMessage(0);

            };

        }.start();

    }

    @Override

    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

        // TODO Auto-generated method stub

        Toast.makeText(MainActivity.this, "第" + arg2 + "个条目== " + list.get(arg2-1),

                Toast.LENGTH_SHORT).show();

    }

    private class MyAdapter extends BaseAdapter {

        @Override

        public int getCount() {

            // TODO Auto-generated method stub

            return list.size();

        }

        @Override

        public Object getItem(int arg0) {

            // TODO Auto-generated method stub

            return null;

        }

        @Override

        public long getItemId(int arg0) {

            // TODO Auto-generated method stub

            return 0;

        }

        @Override

        public View getView(int arg0, View arg1, ViewGroup arg2) {

            // TODO Auto-generated method stub

            TextView textView = new TextView(MainActivity.this);

            textView.setPadding(20, 20, 20, 20);

            textView.setTextSize(18);

            textView.setText(list.get(arg0));

            return textView;

        }

    }

}

下面的listview是用PullToRefreshListView 框架来完成的页可以借鉴下

我是用xutils来进行网络的请求 Gson进行解析的

 package com.it.hello.activity.fragment;

 import java.util.ArrayList;

 import java.util.List;

 import org.xutils.x;

 import org.xutils.common.Callback;

 import org.xutils.http.RequestParams;

 import com.google.gson.Gson;

 import com.google.gson.JsonArray;

 import com.google.gson.JsonElement;

 import com.google.gson.JsonObject;

 import com.google.gson.JsonParser;

 import com.handmark.pulltorefresh.library.PullToRefreshBase;

 import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;

 import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;

 import com.handmark.pulltorefresh.library.PullToRefreshListView;

 import com.it.hello.R;

 import com.it.hello.activity.entity.MsgContent;

 import android.os.Bundle;

 import android.support.v4.app.Fragment;

 import android.util.Log;

 import android.view.LayoutInflater;

 import android.view.View;

 import android.view.ViewGroup;

 import android.widget.BaseAdapter;

 import android.widget.ListView;

 import android.widget.TextView;

 /**

  * 短信的接受 主要实现的是ListView的上拉刷新和下拉加载

  *

  * @author Administrator

  *

  */

 public class MTwoFragment extends Fragment {

     private String urlString = "http://111.39.245.157:9527/cmppbs/getCmpp30DeliverList.action";

     private PullToRefreshListView mPullToRefreshListView;

     private BaseAdapter adapter;

     private int page = 0;

     private List<MsgContent> list = new ArrayList<MsgContent>();

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

             Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         return inflater.inflate(R.layout.mtwofragment, container, false);

     }

     @Override

     public void onActivityCreated(Bundle savedInstanceState) {

         // TODO Auto-generated method stub

         super.onActivityCreated(savedInstanceState);

         setView();

     }

     private void setView() {

         // TODO Auto-generated method stub

         mPullToRefreshListView = (PullToRefreshListView) getActivity()

                 .findViewById(R.id.lv_msg_recieve);

         mPullToRefreshListView.setMode(Mode.BOTH);

         ListView listView = mPullToRefreshListView.getRefreshableView();

         // adapter.notifyDataSetChanged();

         page = 1;

         getAppHttp(page);

         OnRefreshListener2<ListView> mListener2 = new OnRefreshListener2<ListView>() {

             @Override

             public void onPullDownToRefresh(

                     PullToRefreshBase<ListView> refreshView) {

                 // TODO Auto-generated method stub

                 list.clear();

                 adapter.notifyDataSetChanged();

                 page = 1;

                 getAppHttp(page);

             }

             @Override

             public void onPullUpToRefresh(

                     PullToRefreshBase<ListView> refreshView) {

                 // TODO Auto-generated method stub

                 page++;

                 getAppHttp(page);

             }

         };

         mPullToRefreshListView.setOnRefreshListener(mListener2);

         adapter = new Msg();

         listView.setAdapter(adapter);

     }

     private void getAppHttp(int page2) {

         // TODO Auto-generated method stub

         RequestParams params = new RequestParams(urlString);

         params.addBodyParameter("page", page2 + "");

         params.addBodyParameter("rows", "5");

         params.addBodyParameter("order", "desc");

         x.http().get(params, new Callback.CommonCallback<String>() {

             @Override

             public void onCancelled(CancelledException arg0) {

                 // TODO Auto-generated method stub

             }

             @Override

             public void onError(Throwable arg0, boolean arg1) {

                 // TODO Auto-generated method stub

             }

             @Override

             public void onFinished() {

                 // TODO Auto-generated method stub

             }

             @Override

             public void onSuccess(String arg0) {

                 // TODO Auto-generated method stub

                 Log.d("jiejie", arg0);

                 if (arg0 != null) {

                     // 1 获取解析者

                     JsonParser parser = new JsonParser();

                     // 2 获取根节点

                     JsonElement element = parser.parse(arg0);

                     // 根据文档判断根节点属于什么类型的Gson节点对象

                     JsonObject root = element.getAsJsonObject();

                     // 获取节点下的某个节点的value

                     JsonArray array = root.getAsJsonArray("rows");

                     for (JsonElement obj : array) {

                         list.add(new Gson().fromJson(obj, MsgContent.class));

                     }

                     System.out.println(list.get(0).getMsgContent());

                     adapter.notifyDataSetChanged();

                     mPullToRefreshListView.onRefreshComplete();

                 }

             }

         });

     }

     /**

      * 短信接受的适配器

      *

      * @author Administrator

      *

      */

     private class Msg extends BaseAdapter {

         @Override

         public int getCount() {

             // TODO Auto-generated method stub

             if (list != null) {

                 return list.size();

             } else {

                 return 0;

             }

         }

         @Override

         public Object getItem(int arg0) {

             // TODO Auto-generated method stub

             return list.get(arg0);

         }

         @Override

         public long getItemId(int arg0) {

             // TODO Auto-generated method stub

             return arg0;

         }

         @Override

         public View getView(int arg0, View arg1, ViewGroup arg2) {

             // TODO Auto-generated method stub

             ViewHolder holder = null;

             if (arg1 == null) {

                 holder = new ViewHolder();

                 arg1 = View.inflate(getActivity(), R.layout.item_msgcontent,

                         null);

                 holder.textView = (TextView) arg1.findViewById(R.id.msg_phones);

                 holder.textView7 = (TextView) arg1.findViewById(R.id.moDates);

                 holder.textView3 = (TextView) arg1

                         .findViewById(R.id.msgLengths);

                 holder.textView4 = (TextView) arg1.findViewById(R.id.msgFmts);

                 holder.textView5 = (TextView) arg1

                         .findViewById(R.id.registeredDeliverys);

                 holder.textView6 = (TextView) arg1

                         .findViewById(R.id.msgContents);

                 arg1.setTag(holder);

             } else {

                 holder = (ViewHolder) arg1.getTag();

             }

             MsgContent msgContent = list.get(arg0);

             holder.textView7.setText(msgContent.getMoDate());

             holder.textView3.setText("短信长度 ： " + msgContent.getMsgLength());

             holder.textView4.setText("信息格式： " + msgContent.getMsgFmt());

             int ddString = msgContent.getRegisteredDelivery();

             if (ddString == 0) {

                 holder.textView5.setText("状态报告： " + "  不需要");

             } else {

                 holder.textView5.setText("状态报告： " + "  需要");

             }

             holder.textView6.setText("短信内容： " + msgContent.getMsgContent());

             return arg1;

         }

     }

     static class ViewHolder {

         TextView textView;

         TextView textView2;

         TextView textView3;

         TextView textView4;

         TextView textView5;

         TextView textView6;

         TextView textView7;

     }

 }

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