Android基础：ListView + ViewPager ( 四 )

来源：互联网发布：ubuntu root密码编辑：程序博客网时间：2024/05/19 16:06

引用框架PullToRefresh,把ViewPager+PullToRefreshListView放在线性布局中

1 效果图：

这里写图片描述

2 布局：MainActivity.java

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context=".MainActivity" >    <android.support.v4.view.ViewPager        android:id="@+id/viewpager"        android:layout_width="match_parent"        android:layout_height="160dp" />    <com.handmark.pulltorefresh.library.PullToRefreshListView        android:id="@+id/ptf_listview"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:cacheColorHint="#00000000"        android:divider="#19000000"        android:dividerHeight="4dp"        android:fadingEdge="none"        android:fastScrollEnabled="false"        android:footerDividersEnabled="false"        android:headerDividersEnabled="false"        android:smoothScrollbar="true" /></LinearLayout>

3 代码：MainActivity.java

package com.cqc.listview_viewpager05;import java.util.ArrayList;import java.util.List;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;import com.handmark.pulltorefresh.library.PullToRefreshListView;import android.os.Bundle;import android.os.SystemClock;import android.app.Activity;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;/** *布局：linearLayout(竖直排列) viewpager + PullToRefreshListView *BUG:下拉刷新的时候viewpager不会跟着下拉，刷新的布标在viewpager下面 * @author cui * */public class MainActivity extends Activity {    private ViewPager viewpager;    private PullToRefreshListView ptf_listview;    private List<ImageView> imageList = new ArrayList<ImageView>();    private List<String> lvList = new ArrayList<String>();    private Context context = MainActivity.this;    private ListView listView;    private MyLvAdapter lvAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initViewPagerData();        initListViewData();        initViewPager();        initListView();    }    // ListView----------------------------------------------    private void initListView() {        ptf_listview = (PullToRefreshListView) findViewById(R.id.ptf_listview);        ptf_listview.setMode(Mode.BOTH);        ptf_listview.setOnRefreshListener(new OnRefreshListener<ListView>() {            @Override            public void onRefresh(PullToRefreshBase<ListView> refreshView) {                switch (refreshView.getCurrentMode()) {// switch()内不提示                case PULL_FROM_START:                    downData();// 下拉刷新数据                    break;                case PULL_FROM_END:                    upData();// 上拉加载数据                    break;                default:                    break;                }                // 或者：                // if (refreshView.getCurrentMode() == Mode.PULL_FROM_START) {                // downData();// 下拉刷新数据                // } else {                // upData();// 上拉加载数据                // }            }        });        listView = ptf_listview.getRefreshableView();        lvAdapter = new MyLvAdapter();        listView.setAdapter(lvAdapter);        listView.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id) {                Toast.makeText(MainActivity.this, "ListView--" + position,                        Toast.LENGTH_SHORT).show();            }        });    }    // 下拉刷新数据    protected void downData() {        new Thread() {            public void run() {                SystemClock.sleep(1000);                // 下拉刷新也可以不用加载数据，直接网络请求数据再展示                for (int i = 0; i < 3; i++) {                    lvList.add(0, "下拉刷新数据---" + i);//                }                runOnUiThread(new Runnable() {                    public void run() {                        lvAdapter.notifyDataSetChanged();                        ptf_listview.onRefreshComplete();                    }                });            };        }.start();    }    // 上拉加载数据    protected void upData() {        new Thread() {            public void run() {                SystemClock.sleep(1000);                for (int i = 0; i < 3; i++) {                    lvList.add("上拉加载数据" + i);                }                runOnUiThread(new Runnable() {                    public void run() {                        lvAdapter.notifyDataSetChanged();                        ptf_listview.onRefreshComplete();                    }                });            };        }.start();    }    private void initListViewData() {        lvList.clear();        for (int i = 0; i < 10; i++) {            lvList.add("item--" + i);        }    }    class MyLvAdapter extends BaseAdapter {        @Override        public int getCount() {            return lvList.size();        }        @Override        public Object getItem(int position) {            return lvList.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            TextView tv = new TextView(MainActivity.this);            tv.setText(lvList.get(position));            tv.setTextSize(30);            return tv;        }    }    // viewpager-------------------------------------    private void initViewPagerData() {        imageList.clear();        ImageView iv1 = new ImageView(this);        iv1.setBackgroundResource(R.drawable.a);        ImageView iv2 = new ImageView(this);        iv2.setBackgroundResource(R.drawable.b);        ImageView iv3 = new ImageView(this);        iv3.setBackgroundResource(R.drawable.c);        ImageView iv4 = new ImageView(this);        iv4.setBackgroundResource(R.drawable.d);        imageList.add(iv1);        imageList.add(iv2);        imageList.add(iv3);        imageList.add(iv4);    }    private void initViewPager() {        // viewpager = (MyViewPager) findViewById(R.id.viewpager);        viewpager = (ViewPager) findViewById(R.id.viewpager);        MyPagerAdapter adapter = new MyPagerAdapter();        viewpager.setAdapter(adapter);        viewpager.setOnPageChangeListener(new OnPageChangeListener() {            @Override            public void onPageSelected(int position) {                Toast.makeText(MainActivity.this, "viewpager--" + position,                        Toast.LENGTH_SHORT).show();            }            @Override            public void onPageScrolled(int position, float positionOffset,                    int positionOffsetPixels) {            }            @Override            public void onPageScrollStateChanged(int state) {            }        });    }    class MyPagerAdapter extends PagerAdapter {        @Override        public int getCount() {            return imageList.size();        }        @Override        public boolean isViewFromObject(View view, Object object) {            return view == object;        }        @Override        public Object instantiateItem(ViewGroup container, int position) {            container.addView(imageList.get(position));            return imageList.get(position);        }        @Override        public void destroyItem(ViewGroup container, int position, Object object) {            container.removeView((View) object);        }    }}

4 缺点：

1 下拉的时候viewpager不动，刷新的头布局在viewpager和listview之间。
2 所以，我们只可以把viewpager作为listview的头布局来使用：listView.addHeaderView(viewpager)。
3 见下一篇：Android基础：ListView + ViewPager ( 五 )

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