Android listview+SwipeRefreshLayout 下拉刷新，上拉加载．

Android常用三方框架Android常用三方框架
首先：自定义SwipeRefreshLayout　可直接拿来使用．

import android.content.Context;import android.support.v4.widget.SwipeRefreshLayout;import android.util.AttributeSet;import android.util.Log;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.ViewConfiguration;import android.widget.AbsListView;import android.widget.ListView;/** * 继承自SwipeRefreshLayout,从而实现滑动到底部时上拉加载更多的功能. * */public class RefreshLayout extends SwipeRefreshLayout implements AbsListView.OnScrollListener {    /**     * 滑动到最下面时的上拉操作     */    private int mTouchSlop;    /**     * listview实例     */    private ListView mListView;    /**     * 上拉监听器, 到了最底部的上拉加载操作     */    private OnLoadListener mOnLoadListener;    /**     * ListView的加载中footer     */    private View mListViewFooter;    /**     * 按下时的y坐标     */    private int mYDown;    /**     * 抬起时的y坐标, 与mYDown一起用于滑动到底部时判断是上拉还是下拉     */    private int mLastY;    /**     * 是否在加载中 ( 上拉加载更多 )     */    private boolean isLoading = false;    /**     * @param context     */    public RefreshLayout(Context context) {        this(context, null);    }    public RefreshLayout(Context context, AttributeSet attrs) {        super(context, attrs);        mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();        mListViewFooter = LayoutInflater.from(context).inflate(R.layout.listview_footer, null,                false);    }    @Override    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {        super.onLayout(changed, left, top, right, bottom);        // 初始化ListView对象        if (mListView == null) {            getListView();        }    }    /**     * 获取ListView对象     */    private void getListView() {        int childs = getChildCount();        if (childs > 0) {            View childView = getChildAt(0);            if (childView instanceof ListView) {                mListView = (ListView) childView;                // 设置滚动监听器给ListView, 使得滚动的情况下也可以自动加载                mListView.setOnScrollListener(this);                Log.d(VIEW_LOG_TAG, "### 找到listview");            }        }    }    @Override    public boolean dispatchTouchEvent(MotionEvent event) {        final int action = event.getAction();        switch (action) {            case MotionEvent.ACTION_DOWN:                // 按下                mYDown = (int) event.getRawY();                break;            case MotionEvent.ACTION_MOVE:                // 移动                mLastY = (int) event.getRawY();                break;            case MotionEvent.ACTION_UP:                // 抬起                if (canLoad()) {                    loadData();                }                break;            default:                break;        }        return super.dispatchTouchEvent(event);    }    /**     * 是否可以加载更多, 条件是到了最底部, listview不在加载中, 且为上拉操作.     *     * @return     */    private boolean canLoad() {        return isBottom() && !isLoading && isPullUp();    }    /**     * 判断是否到了最底部     */    private boolean isBottom() {        if (mListView != null && mListView.getAdapter() != null) {            return mListView.getLastVisiblePosition() == (mListView.getAdapter().getCount() - 1);        }        return false;    }    /**     * 是否是上拉操作     *     * @return     */    private boolean isPullUp() {        return (mYDown - mLastY) >= mTouchSlop;    }    /**     * 如果到了最底部,而且是上拉操作.那么执行onLoad方法     */    private void loadData() {        if (mOnLoadListener != null) {            // 设置状态            setLoading(true);            //            mOnLoadListener.onLoad();        }    }    /**     * @param loading     */    public void setLoading(boolean loading) {        isLoading = loading;        if (isLoading) {            mListView.addFooterView(mListViewFooter);        } else {            mListView.removeFooterView(mListViewFooter);            mYDown = 0;            mLastY = 0;        }    }    /**     * @param loadListener     */    public void setOnLoadListener(OnLoadListener loadListener) {        mOnLoadListener = loadListener;    }    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {    }    @Override    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,                         int totalItemCount) {        // 滚动时到了最底部也可以加载更多        if (canLoad()) {            loadData();        }    }    /**     * 加载更多的监听器     *     * @author mrsimple     */    public static interface OnLoadListener {        public void onLoad();    }}

布局activity_main.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.myapplication.MainActivity">    <com.example.myapplication.RefreshLayout        android:id="@+id/swipe_layout"        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:footerDividersEnabled="false"        >        </ListView>    </com.example.myapplication.RefreshLayout></RelativeLayout>

item_base.xml，需要显示的内容

<?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"    >        <TextView            android:id="@+id/tv_title"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:background="@android:color/white"            android:text="视线好转"/></LinearLayout>

listview_footer.xml．底部加载控件

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"                android:layout_width="fill_parent"                android:layout_height="wrap_content"                android:gravity="center"                android:paddingBottom="8dip"                android:paddingTop="5dip" >    <ProgressBar        android:id="@+id/pull_to_refresh_load_progress"        style="@style/Widget.AppCompat.ProgressBar"        android:layout_width="wrap_content"        android:layout_height="20dp"        android:layout_centerVertical="true"        android:layout_centerHorizontal="true"        android:paddingRight="100dp"        android:indeterminate="true" />    <TextView        android:id="@+id/pull_to_refresh_loadmore_text"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:gravity="center"        android:paddingTop="5dip"        android:text="加载"        android:textSize="14sp"    /></RelativeLayout>

MainActivity中：

 // 获取RefreshLayout实例        myRefreshListView = (RefreshLayout)                findViewById(R.id.swipe_layout);        // 设置下拉刷新时的颜色值,颜色值需要定义在xml中　颜色根据时间长度变换        myRefreshListView                .setColorSchemeResources(R.color.colorPrimary,                        R.color.colorPrimary, R.color.colorAccent,                        R.color.colorPrimaryDark);        //首次进入是自动刷新动作        myRefreshListView.setRefreshing(true);        //首次进入下拉动作刷新的时间        myRefreshListView.postDelayed(new Runnable() {            @Override            public void run() {                postAsynHttp();                myRefreshListView.setRefreshing(false);            }        },5000);        // 设置下拉刷新监听器        myRefreshListView.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                Toast.makeText(MainActivity.this, "刷新", Toast.LENGTH_SHORT).show();                myRefreshListView.postDelayed(new Runnable() {                    @Override                    public void run() {                        // 更新数据                        postAsynHttp();//网络请求                        listAdapter.notifyDataSetChanged();                        // 更`   新完后调用该方法结束刷新                        myRefreshListView.setRefreshing(false);                    }                }, 1000);            }        });        // 加载监听器        myRefreshListView.setOnLoadListener(new RefreshLayout.OnLoadListener() {            @Override            public void onLoad() {                Toast.makeText(MainActivity.this, "加载", Toast.LENGTH_SHORT).show();                myRefreshListView.postDelayed(new Runnable() {                    @Override                    public void run() {                        postAsynHttp();                        // 加载完后调用该方法                        myRefreshListView.setLoading(false);                        listAdapter.notifyDataSetChanged();                    }                }, 1500);            }        });