Android之 用MVP模式 来实现webview 历史记录保存与显示

MVP在android上是常见的一种设计模式，在Launhcer,手机浏览器里面经常会看到，观摩了下其他大神写的，现在总结下，操刀起来写个demo

有什么问题的地方请提出来。

大家一起研究讨论。

demo 下载地址;http://download.csdn.net/detail/xufeifandj/8267619

demo主要是 主页是一个webview，实现了 历史记录的添加，与显示。例子比较简单。

整个项目的结构如下：

HistoryPresenter.java 主要是对view与model的控制相当于MVC中的 控制层吧。

具体实现添加历史记录移除历史记录等业务逻辑，都在HistoryModel里面去实现了。而UI.java则是一个接口，通过业务逻辑分析，把数据交予UI去通知MainAcitivy更新View.

package com.ferris.ferrismvp.presenter;

import java.util.List;

import com.ferris.ferrismvp.UI;
import com.ferris.ferrismvp.beam.History;
import com.ferris.ferrismvp.model.HistoryModel;
import com.ferris.ferrismvp.model.IHistoryModel;

public class HistoryPresenter {
	private UI ui;
	private IHistoryModel iHistoryModel;
	public HistoryPresenter(UI ui) {
		// TODO Auto-generated constructor stub
		this.ui=ui;
		this.iHistoryModel=new HistoryModel();
	}

	/**
	 * 添加历史记录
	 * @param hisString
	 */
	public void AddHistory(History hisString){
		iHistoryModel.addHistory(hisString);
	}

	/**
	 * 一掉历史记录
	 * @param hisString
	 */
	public void removeHistory(History hisString){
		iHistoryModel.removeHistory(hisString);
	}
	/**
	 * 显示所有历史记录
	 */
	public void showHistorys(){
		List<History> histories=iHistoryModel.showAllHistory();
		ui.showAllHistory(histories);
	}
}

历史记录Model业务逻辑接口，添加删除，查询3个方法。

package com.ferris.ferrismvp.model;

import java.util.List;

import com.ferris.ferrismvp.beam.History;

public interface IHistoryModel {

	public void addHistory(History history);
	public void removeHistory(History history);
	public List<History>  showAllHistory();
}

具体实现逻辑

package com.ferris.ferrismvp.model;

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

import com.ferris.ferrismvp.beam.History;

public class HistoryModel implements IHistoryModel{
	private List<History> historys=new ArrayList<History>();
	public HistoryModel() {
		// TODO Auto-generated constructor stub

	}

	@Override
	public void addHistory(History history) {
		// TODO Auto-generated method stub
		historys.add(history);
	}

	@Override
	public void removeHistory(History history) {
		// TODO Auto-generated method stub
		int removeId=-1;
		for(int i=0;i<historys.size();i++){
			if(historys.get(i).getUrl().equals(history.getUrl())){
				removeId=i;
			}
		}

		if(removeId!=-1){
			historys.remove(removeId);
		}
	}

	@Override
	public List<History> showAllHistory() {
		// TODO Auto-generated method stub
		return historys;
	}

}

History Bean对象

package com.ferris.ferrismvp.beam;

public class History {
	private String title;
	private String url;
	public History() {
		// TODO Auto-generated constructor stub
	}

	public History(String title,String url) {
		// TODO Auto-generated constructor stub
		this.title=title;
		this.url=url;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getUrl() {
		return url;
	}
	public void setUrl(String url) {
		this.url = url;
	}

}

UI接口类

package com.ferris.ferrismvp;

import java.util.List;

import com.ferris.ferrismvp.beam.History;

public interface UI {
	public void showAllHistory(List<History> historys);
}

package com.ferris.ferrismvp;

import java.util.List;

import com.ferris.ferrismvp.beam.History;
import com.ferris.ferrismvp.presenter.HistoryPresenter;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity implements OnClickListener,UI{
	private WebView webView1 ;
	private Button addHistory,showHistory;
	private HistoryPresenter historyPresenter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        findView();
        initWebView();

        historyPresenter=new HistoryPresenter(this);
    }

	private void initWebView() {
		// TODO Auto-generated method stub
		webView1.getSettings().setJavaScriptEnabled(true);
		webView1.loadUrl("http://www.baidu.com");
	}

	private void findView() {
		// TODO Auto-generated method stub
		webView1=(WebView)findViewById(R.id.webView1);
		addHistory=(Button)findViewById(R.id.button1);
		showHistory=(Button)findViewById(R.id.button2);
        addHistory.setOnClickListener(this);
        showHistory.setOnClickListener(this);
	}
	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		switch (v.getId()) {
		case R.id.button1://添加历史记录
			historyPresenter.AddHistory(new History(webView1.getTitle(),webView1.getUrl()));
			break;
		case R.id.button2://显示历史记录
			historyPresenter.showHistorys();
			break;

		default:
			break;
		}
	}

	@Override
	public void showAllHistory(List<History> historys) {
		// TODO Auto-generated method stub
		Toast.makeText(MainActivity.this, historys.toString(), Toast.LENGTH_SHORT).show();
	}

}