Android各种View的下拉刷新与加载更多

来源：互联网发布：杰刚队长知乎编辑：程序博客网时间：2024/05/16 05:57

1.基本介绍

一个可下拉刷新与上拉加载更多的框架，可对ListView、GridView、WebView、ScrollView等几乎所有常用的View类型进行此操作，并且还提供了GIF动画的上拉与下拉头，也可自定义上拉头与下拉头。（本框架基于https://github.com/jingchenUSTC/PullToRefreshAndLoad ，特此感谢）
项目地址：https://github.com/lynnchurch/PullToRefresh

2.效果图

pulltorefresh

3.使用示例代码

布局文件

<com.jingchen.pulltorefresh.PullToRefreshLayout          xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/refresh_view"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#FFF" >    <com.jingchen.pulltorefresh.PullableListView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:divider="#AAA"        android:dividerHeight="5dp" /></com.jingchen.pulltorefresh.PullToRefreshLayout>

使用代码

package com.jingchen.pulltorefresh.activity;import java.io.IOException;import java.util.ArrayList;import java.util.List;import pl.droidsonroids.gif.GifDrawable;import com.jingchen.pulltorefresh.MyAdapter;import com.jingchen.pulltorefresh.MyPullListener;import com.jingchen.pulltorefresh.PullToRefreshLayout;import com.jingchen.pulltorefresh.R;import android.app.Activity;import android.content.res.Resources.NotFoundException;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemLongClickListener;public class PullableGifActivity extends Activity{    private ListView listView;    private PullToRefreshLayout ptrl;    private boolean isFirstIn=true;    @Override    protected void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_listview);        ptrl = ((PullToRefreshLayout) findViewById(R.id.refresh_view));        // 此处设置下拉刷新或上拉加载更多监听器        ptrl.setOnPullListener(new MyPullListener());        // 设置带gif动画的上拉头与下拉头        try        {            ptrl.setGifRefreshView(new GifDrawable(getResources(), R.drawable.anim));            ptrl.setGifLoadmoreView(new GifDrawable(getResources(), R.drawable.anim));        } catch (NotFoundException e)        {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e)        {            // TODO Auto-generated catch block            e.printStackTrace();        }        listView = (ListView) ptrl.getPullableView();        initListView();    }    @Override    public void onWindowFocusChanged(boolean hasFocus)    {        super.onWindowFocusChanged(hasFocus);        // 第一次进入自动刷新        if (isFirstIn)        {            ptrl.autoRefresh();            isFirstIn = false;        }    }    /**     * ListView初始化方法     */    private void initListView()    {        List<String> items = new ArrayList<String>();        for (int i = 0; i < 30; i++)        {            items.add("这里是item " + i);        }        MyAdapter adapter = new MyAdapter(this, items);        listView.setAdapter(adapter);        listView.setOnItemLongClickListener(new OnItemLongClickListener()        {            @Override            public boolean onItemLongClick(AdapterView<?> parent, View view,                    int position, long id)            {                Toast.makeText(                        PullableGifActivity.this,                        "LongClick on "                                + parent.getAdapter().getItemId(position),                        Toast.LENGTH_SHORT).show();                return true;            }        });        listView.setOnItemClickListener(new OnItemClickListener()        {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id)            {                Toast.makeText(PullableGifActivity.this,                        " Click on " + parent.getAdapter().getItemId(position),                        Toast.LENGTH_SHORT).show();            }        });    } /** * 下拉刷新与上拉加载更多监听器 */ public class MyPullListener implements OnPullListener {     @Override     public void onRefresh(final PullToRefreshLayout pullToRefreshLayout) {        // 下拉刷新操作         new Handler() {             @Override             public void handleMessage(Message msg) {                 // 千万别忘了告诉控件刷新完毕了哦！                 pullToRefreshLayout.refreshFinish(PullToRefreshLayout.SUCCEED);             }         }.sendEmptyMessageDelayed(0, 5000);     }     @Override     public void onLoadMore(final PullToRefreshLayout pullToRefreshLayout) {         // 加载更多操作         new Handler() {             @Override             public void handleMessage(Message msg) {                 // 千万别忘了告诉控件加载完毕了哦！                 pullToRefreshLayout.loadmoreFinish(PullToRefreshLayout.SUCCEED);             }         }.sendEmptyMessageDelayed(0, 5000);     } }}

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