Android MVP设计框架模板 之 漂亮ListView上拉刷新下拉加载更多

Android MVP设计框架模板 之 漂亮ListView上拉刷新下拉加载更多

(本人自行攒写，难免有错误，请谅解)mvp的全称为Model-View-Presenter，Model提供数据，View负责显示，Controller/Presenter负责逻辑的处理。MVP与MVC有着一个重大的区别：在MVP中View并不直接使用Model，它们之间的通信是通过Presenter
(MVC中的Controller)来进行的，所有的交互都发生在Presenter内部，而在MVC中View会直接从Model中读取数据而不是通过 Controller。
项目中大部分是面对接口编程，通过P层可以预先将所有需要的接口功能写出来，进而进行实现，大大提高了项目高内聚，低耦合。适合于团队开发项目。
今天我们是用MVP的设计框架模板来实现一个ListView的上拉刷新下拉加载更多的功能。
项目结构如下图;



1、首先我们ListViewPresenters.java类，他的作用是，控制M业务逻辑层，去获取我们想要的数据，然后通知V层去更新他们对应的UI。由于我们的需求明确，就是实现Listview的上拉刷新，下拉加载更多，初始化控件，设置上拉下拉刷新监听。因此我们可以先把功能接口都写好，让ListViewPresenters去实现其功能即可。

[java] view
plaincopy





package com.android.presenters;



import java.util.ArrayList;



import android.support.v4.app.FragmentActivity;

import android.view.View;



import com.android.handlers.ListViewHandle;

import com.android.services.ListViewService;

import com.android.services.si.IListViewService;

import com.android.view.ListViewFerris;

import com.android.view.vi.IListViewFerris;

import com.android.widget.listview.FerrisListView.OnStartListener;



public class ListViewPresenters {

private IListViewFerris iListViewFerris;

private IListViewService iListViewService;

private FragmentActivity mActivity;

private View view;

private int index = 1;



public ListViewPresenters(FragmentActivity mActivity2, View view2) {

// TODO Auto-generated constructor stub

this.mActivity = mActivity2;

this.view = view2;

this.iListViewFerris = new ListViewFerris(mActivity, view);

this.iListViewService = new ListViewService();

}



/*

* 初始化View层里的控件

*/

public void onFindView() {

iListViewFerris.onFindView();

}

/*

* 上啦刷新方法

*/

public void listViewRefresh(int index) {

//post请求数据，获取数据，并且通过handler接口来通知View更新UI

iListViewService.sendPost(index, new ListViewHandle() {

@Override

public void getData(ArrayList<String> msgs) {

// TODO Auto-generated method stub

//通过handler接口来通知UI去更新数据

iListViewFerris.refresh(msgs);

}

});

}

/*

* 下拉加载更多方法

*/

public void listViewLoadMore(int index) {

//post请求数据，获取数据，并且通过handler接口来通知View更新UI

iListViewService.sendPost(index, new ListViewHandle() {

@Override

public void getData(ArrayList<String> msgs) {

// TODO Auto-generated method stub

//通过handler接口来通知UI去更新数据

if (msgs == null) {

iListViewFerris.showLoadingError();//获取数据失败显示通知

iListViewFerris.loadMore(msgs);//停止加载更多

} else {

iListViewFerris.loadMore(msgs);//停止加载更多

}



}

});

}

/*

* 为Listview设置上拉下拉刷新监听

*/

public void setRefreshOrLoadMoreListem() {

// TODO Auto-generated method stub



iListViewFerris.setRefreshOrLoadMoreListem(new Refresh(),

new Loadmore());

}



/*

* 为Listview第一次，自动下拉刷新

*/

public void firstload() {

// TODO Auto-generated method stub

iListViewFerris.firstLoad();

}



/*

* 上拉刷新监听

*/

public class Refresh implements OnStartListener {



@Override

public void onStart() {

// TODO Auto-generated method stub

index = 1;

listViewRefresh(index);



}



}

/*

* 加载更多监听

*/

public class Loadmore implements OnStartListener {



@Override

public void onStart() {

// TODO Auto-generated method stub

listViewLoadMore(++index);

}



}



}

2、接着我们来看下UI层，我们需要更新哪些数据，需要为哪个UI去具体更新哪些东西。

[java] view
plaincopy





package com.android.view.vi;



import java.util.ArrayList;



import com.android.widget.listview.FerrisListView.OnStartListener;



public interface IListViewFerris {

public void onFindView();//初始化控件

public void showLoadingError();//显示加载错误

public void showLoadingSuccess();//显示加成功

public void setNotifyListView();//刷新Listview

public void refresh(ArrayList<String> msgs);//上拉刷新

public void loadMore(ArrayList<String> msgs);//下拉加载更多

public void setRefreshOrLoadMoreListem(OnStartListener refresh, OnStartListener loadmore);//设置上拉下拉刷新监听

public void firstLoad();//首次自动上拉刷新

}

具体UI层实现的具体方法，主要是 上拉刷新，下拉加载更多，显示错误成功状态，以及初始化控件等方法。

[java] view
plaincopy





package com.android.view;



import java.util.ArrayList;



import android.support.v4.app.FragmentActivity;

import android.view.View;



import com.android.adapter.ListViewAdapter;

import com.android.futilssimple.R;

import com.android.utils.ToastUtils;

import com.android.view.vi.IListViewFerris;

import com.android.widget.listview.FerrisListView;

import com.android.widget.listview.FerrisListView.OnStartListener;

import com.android.widget.listview.SimpleFooter;

import com.android.widget.listview.SimpleHeader;



public class ListViewFerris implements IListViewFerris{

private FragmentActivity mActivity;

private View view;

private FerrisListView listView;

private ListViewAdapter adapter;

public ListViewFerris(FragmentActivity mActivity,View view) {

// TODO Auto-generated constructor stub

this.mActivity=mActivity;

this.view=view;

}



//初始化view

@Override

public void onFindView() {

// TODO Auto-generated method stub

if(mActivity==null||view==null){

return;

}



listView = (FerrisListView)view.findViewById(R.id.zListView);

adapter=new ListViewAdapter(mActivity);



// 设置默认偏移量，主要用于实现透明标题栏功能。（可选）

float density = mActivity.getResources().getDisplayMetrics().density;

listView.setFirstTopOffset((int) (50 * density));



// 设置下拉刷新的样式（可选，但如果没有Header则无法下拉刷新）

SimpleHeader header = new SimpleHeader(mActivity);

header.setTextColor(0xff0066aa);

header.setCircleColor(0xff33bbee);

listView.setHeadable(header);



// 设置加载更多的样式（可选）

SimpleFooter footer = new SimpleFooter(mActivity);

footer.setCircleColor(0xff33bbee);

listView.setFootable(footer);



}





//显示加载失败

@Override

public void showLoadingError() {

// TODO Auto-generated method stub

ToastUtils.showToast(mActivity, "加载失败");

}



//显示加载成功

@Override

public void showLoadingSuccess() {

// TODO Auto-generated method stub

ToastUtils.showToast(mActivity, "加载成功");

}





//刷新数据

@Override

public void setNotifyListView() {

// TODO Auto-generated method stub

if(adapter!=null){

adapter.notifyDataSetChanged();

}

}



//填充刷新数据

@Override

public void refresh(ArrayList<String> msgs) {

// TODO Auto-generated method stub

if(msgs!=null&&msgs.size()>0){

if(listView.getAdapter()==null){

listView.setAdapter(adapter);

adapter.setRefresh(msgs);

}else{



adapter.setRefresh(msgs);

}

listView.setRefreshSuccess("加载成功"); // 通知加载成功

listView.startLoadMore(); // 开启LoadingMore功能

}else{

listView.setRefreshFail("加载失败");

}



}



//填充加载更多数据

@Override

public void loadMore(ArrayList<String> msgs) {

// TODO Auto-generated method stub

if(msgs!=null&&msgs.size()>0){

if(listView.getAdapter()==null){

listView.setAdapter(adapter);

adapter.setData(msgs);

}else{

adapter.setData(msgs);

}



listView.setLoadMoreSuccess();

}else{

listView.stopLoadMore();

}





}



//为Listview设置首次自动上拉刷新

@Override

public void firstLoad(){

listView.refresh(); // 主动下拉刷新

}



//为Listview设置上拉以及下拉刷新

@Override

public void setRefreshOrLoadMoreListem(OnStartListener refresh,

OnStartListener loadmore) {

// TODO Auto-generated method stub

listView.setOnRefreshStartListener(refresh);

listView.setOnLoadMoreStartListener(loadmore);

}





}

3、我们来看下业务逻辑层，主要是通过模拟POST在后台请求数据，然后将获取的数据，返回给P层，由P层去将数据交予V层来更新UI界面。

[java] view
plaincopy





package com.android.services.si;



import com.android.handlers.ListViewHandle;



public interface IListViewService {



//发送post请求

public void sendPost(int index,ListViewHandle handle);

}

业务逻辑才具体实现的功能如下：

[java] view
plaincopy





package com.android.services;



import java.util.ArrayList;



import android.os.Handler;



import com.android.futils.task.FTaskPool;

import com.android.futils.task.TaskItem;

import com.android.handlers.ListViewHandle;

import com.android.services.si.IListViewService;



public class ListViewService implements IListViewService {

String[] data={"加拿大","瑞典","澳大利亚","瑞士","新西兰","挪威","丹麦","芬兰","奥地利","荷兰","德国","日本","比利时","意大利","英国"};

public ListViewService() {

// TODO Auto-generated constructor stub

}



private Handler handler=new Handler();

private ArrayList<String> msgs;



@Override

public void sendPost(int index, ListViewHandle handle) {

// TODO Auto-generated method stub

switch (index) {

case 1:

getData(index,handle);

break;

case 2:

getData(index,handle);

break;

case 3:

getData(index,handle);

break;

case 4:

getData(index,handle);

break;

case 5:

getData(index,handle);

break;

case 6:

getData(index,handle);

break;

default:

msgs=null;

handle.getData(msgs);

break;

}

}



private synchronized void getData(final int index, final ListViewHandle handle) {

// TODO Auto-generated method stub

handler.postDelayed(new Runnable() {

@Override

public void run() {

FTaskPool.getInstance().execute(new TaskItem() {



@Override

public void doMain() {//在前台显示数据

// TODO Auto-generated method stub

if(handle!=null){

handle.getData(msgs);

}



}



@Override

public void doBack() {//在后台处理数据

// TODO Auto-generated method stub

msgs=new ArrayList<String>();

for(String d:data){

msgs.add(index+"、"+d);

}

}

});

}

}, 2 * 1000);//延迟2秒后执行







}





}

4、最后，我们来看下Fragment里面如来调用这个P层，来控制MV进行数据的获取以及更新

[java] view
plaincopy





package com.android.fragment;



import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;



import com.android.futilssimple.R;

import com.android.presenters.ListViewPresenters;



public class ListViewFragment extends Fragment {

private ListViewPresenters listViewPresenters;



public ListViewFragment() {

}



@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

View rootView = inflater.inflate(R.layout.listviewfragment, container, false);

listViewPresenters=new ListViewPresenters(getActivity(), rootView);//新建一个控制器

listViewPresenters.onFindView();//初始化view

listViewPresenters.setRefreshOrLoadMoreListem();//设置刷新监听

listViewPresenters.firstload();//首次自动上拉刷新

return rootView;

}









}

5、源码demo http://download.csdn.net/detail/xufeifandj/8369037