V4包下SwipeRefreshLayout使用（带上拉加载更多）

来源：互联网发布：java中decode函数编辑：程序博客网时间：2024/06/05 11:17

1、布局文件：

 <android.support.v4.widget.SwipeRefreshLayout        android:id="@+id/swipeLayout"        android:layout_width="match_parent"        android:layout_height="match_parent"        >        <ListView            android:id="@+id/id_lv"            android:layout_width="match_parent"            android:layout_height="wrap_content"></ListView>    </android.support.v4.widget.SwipeRefreshLayout>

2、在代码中设置SwipeRefreshLayout的一些属性：

 //设置刷新圈圈的颜色        swipeLayout.setColorSchemeResources(R.color.holo_blue_bright,                R.color.holo_green_light,                R.color.holo_orange_light,                R.color.holo_red_light);        //设置刷新圈圈的大小，可选SwipeRefreshLayout.LARGE或SwipeRefreshLayout.DEFAULT        swipeLayout.setSize(SwipeRefreshLayout.DEFAULT);        //刷新回调，可在里边放置网络操作，请求成功后调用swipeLayout.setRefreshing(false)方法即可让刷新圈圈消失        swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                new Thread(new Runnable() {                    @Override                    public void run() {                        try {                            Thread.sleep(5000);                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                        handler.sendEmptyMessage(0);                    }                }).start();            }        });

3、加载更多，其实就是监听Listview的滚动事件，监听到是最后一个条目时，就去加载显示更多的数据。

 AbsListView.OnScrollListener OnScrollListenerOne = new AbsListView.OnScrollListener() {        @Override        public void onScrollStateChanged(AbsListView view, int scrollState) {            //当滚到最后一行且停止滚动时，执行加载            if (isLastItem && scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE ) {                //加载更多                isLastItem = false; //是否是最后一项                Toast.makeText(MainActivity.this,"加载更多",Toast.LENGTH_SHORT).show();            }        }        @Override        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {            //判断是否滚到最后一行            if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount > 0) {                isLastItem = true;            }        }    };

下边粘上全部代码：

package com.glodon.swiperefreshlayoutdemo;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.design.widget.FloatingActionButton;import android.support.design.widget.Snackbar;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.widget.AbsListView;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class MainActivity extends AppCompatActivity {    private SwipeRefreshLayout swipeLayout;    private ListView listview;    private SimpleAdapter simpleAdapter;    private boolean isLastItem = false;//是否是最后一项    private List<Map<String, Object>> mapList = new ArrayList<>();    private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            switch (msg.what){                case 0:                    swipeLayout.setRefreshing(false);                    break;            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initData();        initView();        initRefreshView();    }    private void initView() {        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)                        .setAction("Action", null).show();            }        });        swipeLayout = (SwipeRefreshLayout)findViewById(R.id.swipeLayout);        listview = (ListView)findViewById(R.id.id_lv);        simpleAdapter = new SimpleAdapter(this, mapList, android.R.layout.simple_list_item_1, new String[]{"item"}, new int[]{android.R.id.text1});        listview.setAdapter(simpleAdapter);    }    //假数据    private void initData() {        for (int i = 0; i < 25; i++) {            Map<String, Object> map = new HashMap<>();            map.put("item", "item" + i);            mapList.add(map);        }    }    private void initRefreshView() {        //设置刷新圈圈的颜色        swipeLayout.setColorSchemeResources(R.color.holo_blue_bright,                R.color.holo_green_light,                R.color.holo_orange_light,                R.color.holo_red_light);        //设置刷新圈圈的大小，可选SwipeRefreshLayout.LARGE或SwipeRefreshLayout.DEFAULT        swipeLayout.setSize(SwipeRefreshLayout.DEFAULT);        //刷新回调，可在里边放置网络操作，请求成功后调用swipeLayout.setRefreshing(false)方法即可让刷新圈圈消失        swipeLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {            @Override            public void onRefresh() {                new Thread(new Runnable() {                    @Override                    public void run() {                        try {                            Thread.sleep(5000);                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                        handler.sendEmptyMessage(0);                    }                }).start();            }        });        listview.setOnScrollListener(OnScrollListenerOne);    }    /**     * 上拉加载更多     */    AbsListView.OnScrollListener OnScrollListenerOne = new AbsListView.OnScrollListener() {        @Override        public void onScrollStateChanged(AbsListView view, int scrollState) {            //当滚到最后一行且停止滚动时，执行加载            if (isLastItem && scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE ) {                //加载更多                isLastItem = false; //是否是最后一项                Toast.makeText(MainActivity.this,"加载更多",Toast.LENGTH_SHORT).show();            }        }        @Override        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {            //判断是否滚到最后一行            if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount > 0) {                isLastItem = true;            }        }    };}

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