Android_ListView上拉加载更多(ListView分页功能)

先上效果图



加载完数据



首先定义一个底部正在加载的布局footer_layout.xml

<?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="match_parent"
android:orientation="vertical">

<LinearLayout
android:id="@+id/load_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="horizontal"
android:paddingBottom="10dip"
android:paddingTop="10dip" >

<ProgressBar
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:textColor="@color/red"
android:textStyle="bold"
android:text="正在加载..." />
</LinearLayout>
</LinearLayout>

自定义ListView---------LoadListView.java

package com.zwb.listviewloaddata.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ListView;

import com.zwb.listviewloaddata.R;

/**
* 类描述:自定义的ListView
* 作者：zwb
* 时间：16-5-9 11:21
* 邮箱：@163.com
*/
public class LoadListView extends ListView implements AbsListView.OnScrollListener {

View footer;// 底部布局；
int totalItemCount;// 总数量；
int lastVisibleItem;// 最后一个可见的item；
boolean isLoading;// 正在加载；
ILoadListener iLoadListener;
public LoadListView(Context context) {
super(context);
initView(context);
}

public LoadListView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}

public LoadListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initView(context);
}

/**
* 添加底部加载提示布局到listview
*
* @param context
*/
private void initView(Context context) {
LayoutInflater inflater = LayoutInflater.from(context);
footer = inflater.inflate(R.layout.footer_layout, null);
footer.findViewById(R.id.load_layout).setVisibility(View.GONE);
this.addFooterView(footer);
this.setOnScrollListener(this);
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub
this.lastVisibleItem = firstVisibleItem + visibleItemCount;
this.totalItemCount = totalItemCount;
}

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub
if (totalItemCount == lastVisibleItem
&& scrollState == SCROLL_STATE_IDLE) {
if (!isLoading) {
isLoading = true;
footer.findViewById(R.id.load_layout).setVisibility(
View.VISIBLE);
// 加载更多
iLoadListener.onLoad();
}
}
}
/**
* 加载完毕
*/
public void loadComplete(){
isLoading = false;
footer.findViewById(R.id.load_layout).setVisibility(
View.GONE);
}

public void setInterface(ILoadListener iLoadListener){
this.iLoadListener = iLoadListener;
}
//加载更多数据的回调接口
public interface ILoadListener{
public void onLoad();
}
}

在布局文件中引用自定义的ListView

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:layout_width="match_parent"
android:background="@color/white"
android:layout_height="match_parent"
tools:context="com.zwb.listviewloaddata.MainActivity">

<com.zwb.listviewloaddata.view.LoadListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:cacheColorHint="#00000000"
android:dividerHeight="5dip"
/>
</RelativeLayout>

ListView的item资源文件:

item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:layout_centerInParent="true"
android:background="@color/white"
card_view:cardCornerRadius="8dp">

<LinearLayout
android:gravity="center_vertical"
android:orientation="horizontal"
android:background="@color/white"
android:layout_width="match_parent"
android:layout_height="60dp">

<ImageView
android:id="@+id/item_img"
android:layout_width="50dp"
android:layout_height="50dp"
android:background="@mipmap/ic_launcher"
android:layout_marginLeft="10dp"/>

<LinearLayout

android:layout_marginLeft="10dp"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:id="@+id/item_name"
android:text="我是标题"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/item_msg"
android:text="今天天气还可以啊"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>

</LinearLayout>
</android.support.v7.widget.CardView>

　接下来就是在Activity中初始化数据和对ListView设置数据

MainActivity.java

package com.zwb.listviewloaddata;

import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;

import com.zwb.listviewloaddata.adapter.ItemAdapter;
import com.zwb.listviewloaddata.entity.ItemEntity;
import com.zwb.listviewloaddata.view.LoadListView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements LoadListView.ILoadListener{

private ArrayList<ItemEntity> list = new ArrayList<>();
private LoadListView listView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

//初始化数据的方法
getData();
showListView(list);
}

private ItemAdapter adapter;

private void showListView(ArrayList<ItemEntity> list) {
if (adapter == null){
listView = ((LoadListView) findViewById(R.id.listView));
listView.setInterface(this);
adapter = new ItemAdapter(getApplicationContext() ,list);
listView.setAdapter(adapter);
}else {
adapter.onDateChange(list);
}
}

privat
4000
e void getMoreData() {
for (int i = 0; i < 3; i++) {
ItemEntity entity = new ItemEntity();
entity.setName("新的测试标题");
entity.setMsg("我是一条新的测试的内容啊～");
list.add(entity);
}
}

private void getData() {
for (int i = 0; i < 10; i++) {
ItemEntity entity = new ItemEntity();
entity.setName("测试标题");
entity.setMsg("我是一条测试的内容啊～");
list.add(entity);
}
}

@Override
public void onLoad() {
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {

//加载数据
getMoreData();

//更新ListView的显示
showListView(list);

//ListView加载完毕
listView.loadComplete();

}
} , 2000);
}

}

ListView的Adapter

ItemAdapter.java

package com.zwb.listviewloaddata.adapter;

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.zwb.listviewloaddata.R;
import com.zwb.listviewloaddata.entity.ItemEntity;

import java.util.ArrayList;
import java.util.List;

/**
* 类描述:ListView的Adapter
* 作者：zwb
* 时间：16-5-9 11:06
* 邮箱：@163.com
*/
public class ItemAdapter extends BaseAdapter{

private Context context;
private ArrayList<ItemEntity> list;

public ItemAdapter(Context context, ArrayList<ItemEntity> list) {
this.context = context;
this.list = list;
}
public void onDateChange(ArrayList<ItemEntity> list) {
this.list = list;
this.notifyDataSetChanged();
}

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

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

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {

ItemEntity entity = list.get(position);
ViewHolder holder;
if (convertView == null){
holder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(R.layout.item_layout , parent ,false);
holder.name = ((TextView) convertView.findViewById(R.id.item_name));
holder.msg = ((TextView) convertView.findViewById(R.id.item_msg));
convertView.setTag(holder);
}else {
holder = ((ViewHolder) convertView.getTag());
}
holder.name.setText(entity.getName());
holder.msg.setText(entity.getMsg());

return convertView;
}

class ViewHolder{
TextView name;
TextView msg;
}
}

ok大功告成。

下载链接

Android_ListView分页