Android实现ListView分页加载数据

本文实例为大家分享了ListView分页加载数据的具体代码，供大家参考，具体内容如下

FenyeActivity

package com.example.myapplication.fenye;

import androidx.appcompat.app.AppCompatActivity;

import android.app.ListActivity;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.AbsListView;
import android.widget.Button;
import android.widget.ListView;

import com.example.myapplication.R;

import java.util.ArrayList;

public class FenyeActivity extends ListActivity implements AbsListView.OnScrollListener {
   private ListView listView;
   private int visibleLastIndex = 0; //最后的可视项索引
   private int visibleItemCount;  // 当前窗口可见项总数
   private ListViewAdapter adapter;
   private View loadMoreView;
   private Button loadMoreButton;
   private Handler handler = new Handler();

@Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_fenye);

loadMoreView = getLayoutInflater().inflate(R.layout.load_more, null);
       loadMoreButton = (Button) loadMoreView.findViewById(R.id.loadMoreButton);

listView = getListView();    //获取id是list的ListView

listView.addFooterView(loadMoreView); //设置列表底部视图

initAdapter();

setListAdapter(adapter);    //自动为id是list的ListView设置适配器

listView.setOnScrollListener(this);  //添加滑动监听
   }

/**
    * 初始化适配器
    */
   private void initAdapter() {
       ArrayList<String> items = new ArrayList<String>();
       for (int i = 0; i < 16; i++) {
           items.add(String.valueOf(i + 1));
       }
       adapter = new ListViewAdapter(this, items);
   }

/**
    * 滑动时被调用
    */
   @Override
   public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
       this.visibleItemCount = visibleItemCount;
       visibleLastIndex = firstVisibleItem + visibleItemCount - 1;
   }

/**
    * 滑动状态改变时被调用
    */
   @Override
   public void onScrollStateChanged(AbsListView view, int scrollState) {
       int itemsLastIndex = adapter.getCount() - 1; //数据集最后一项的索引
       int lastIndex = itemsLastIndex + 1;    //加上底部的loadMoreView项
       if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE && visibleLastIndex == lastIndex) {
           //如果是自动加载,可以在这里放置异步加载数据的代码
           Log.e("wy", "loading...");

handler.postDelayed(new Runnable() {
               @Override
               public void run() {

loadData();

adapter.notifyDataSetChanged(); //数据集变化后,通知adapter
                   listView.setSelection(visibleLastIndex - visibleItemCount + 1); //设置选中项

loadMoreButton.setText("load more"); //恢复按钮文字
               }
           }, 1000);
       }
   }

/**
    * 点击按钮事件
    * @param view
    */
   public void loadMore(View view) {
       loadMoreButton.setText("loading..."); //设置按钮文字loading
       handler.postDelayed(new Runnable() {
           @Override
           public void run() {

loadData();

adapter.notifyDataSetChanged(); //数据集变化后,通知adapter
               listView.setSelection(visibleLastIndex - visibleItemCount + 1); //设置选中项

loadMoreButton.setText("load more"); //恢复按钮文字
           }
       }, 1000);
   }

/**
    * 模拟加载数据
    */
   private void loadData() {
       int count = adapter.getCount();
       for (int i = count; i < count + 10; i++) {
           adapter.addItem(String.valueOf(i + 1));
       }
   }

}

ListViewAdapter

package com.example.myapplication.fenye;

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.myapplication.R;

public class ListViewAdapter extends BaseAdapter {
   private List<String> items;
   private LayoutInflater inflater;

public ListViewAdapter(Context context, List<String> items) {
       this.items = items;
       inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
   }

@Override
   public int getCount() {
       return items.size();
   }

@Override
   public Object getItem(int position) {
       return items.get(position);
   }

@Override
   public long getItemId(int position) {
       return position;
   }

@Override
   public View getView(int position, View view, ViewGroup parent) {
       if (view == null) {
           view = inflater.inflate(R.layout.list_fy_item, null);
       }
       TextView text = (TextView) view.findViewById(R.id.list_item_text);
       if(null!=items){
           text.setText(items.get(position));
       }

return view;
   }

/**
    * 添加列表项
    * @param item
    */
   public void addItem(String item) {
       items.add(item);
   }
}

activity_fenye.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:paddingLeft="3dp"
   android:paddingRight="3dp">
   <ListView
       android:id="@id/android:list"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"/>
</LinearLayout>

list_fy_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent">
   <TextView
       android:id="@+id/list_item_text"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:text="aa"
       android:gravity="center"
       android:textSize="20sp"
       android:paddingTop="10dp"
       android:paddingBottom="10dp"/>
</LinearLayout>

load_more.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content">
   <Button
       android:id="@+id/loadMoreButton"
       android:visibility="gone"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:text="load more"
       android:onClick="loadMore"/>
</LinearLayout>

来源：https://blog.csdn.net/xiyangyang8110/article/details/121441770