android 用mvp模式来架构自己的app+打造Recyclerview万能适配器

最近又要启动新的项目，项目较小，所有就像尝试点自己不会的玩意。（在小公司造轮子有一点好处就是不用那么死板，老板叫你造轮子，你只要造出来能用就好）。于是就发现了一套自己没用到的架构来打造自己的轮子：dagger2+mvp+rxjava+retrofit2+bindview。

什么是mvp模式,百度一大把，这里不做解释，像我做过j2ee开发的，很容易就能明白，类似于SSH那一套（struts+spring+hibernate）

大概也就是，让View（视图）与Model（逻辑）和Presenter（控制）分别管理自己该管的东西。View管理视图，Model管理逻辑，但是Model与View之间不能直接进行交互，必须通过Presenter。

example:用Mvp模式让RecyclerView加载数据：

1，逻辑层：包括一个接口（里面要分别定义view，modle，presenter的接口以及要实现的方法）和一个实现该接口里的关于逻辑的接口的类

package biz;

import android.content.Context;
import android.support.v7.widget.RecyclerView;

import com.github.mikephil.charting.charts.PieChart;

/**
* Created by Administrator on 2016/12/9.
*/

public interface HomePageFragmentContact {

/**
*     视图接口
*     定义你需要activity或者fragment返回给你的参数：上下文，饼图（view），RecyclerView（view）
*/

interface HomePageFragmentView {
Context haveContext();

PieChart havePieChart();

RecyclerView haveRecyclerView();
}

/**
* 逻辑层的接口，定义了加载饼图和Recyclerview加载数据的抽象方法
*/

interface HomePageFragmentModel {
void initPie(Context context, PieChart pieChart);
void initModule(Context context, RecyclerView recyclerView);
}

/**
* 控制层接口：让view与model间接的交互
*/

interface HomePageFragmentPresenter {
void initPie();
void initModule();
}
}

package biz;
import android.content.Context;
import android.graphics.Color;
import android.support.v7.widget.RecyclerView;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.alibaba.fastjson.JSON;
import com.github.mikephil.charting.charts.PieChart;
import com.github.mikephil.charting.components.Legend;
import com.github.mikephil.charting.data.Entry;
import com.github.mikephil.charting.data.PieData;
import com.github.mikephil.charting.data.PieDataSet;
import com.github.mikephil.charting.formatter.ValueFormatter;
import com.github.mikephil.charting.highlight.Highlight;
import com.github.mikephil.charting.listener.OnChartValueSelectedListener;
import com.github.mikephil.charting.utils.ViewPortHandler;
import com.wyt.hcy.parentmanagerapp.R;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import adapter.CommonAdapter;
import bean.Module;
import json.PieJsonData;
import utils.CommonViewHolder;
import utils.MyHttpUtils;

/**
* Created by hcy on 2016/12/9.
*/

public class HomePageFragmentBiz implements HomePageFragmentContact.HomePageFragmentModel, OnChartValueSelectedListener {
private PieData mPieData;
private List<Module> moduleList;
private CommonAdapter moduleAdapter;

/**
* 加载饼图
* @param context
* @param pieChart
*/

dfdb
@Override
public void initPie(final Context context, final PieChart pieChart) {
Map<String,String> keyMap= new LinkedHashMap<String,String>();

keyMap.put("ago_time","7");

keyMap.put("userno","1280150");

new MyHttpUtils(context, keyMap, "/api/getOperationCondition.php", new MyHttpUtils.HttpResponseListener() {
@Override
public void HttpSuccess(String msg) {

Log.i("获取学生作业的饼图数据::",msg);

PieJsonData pieJsonData = JSON.parseObject(msg, PieJsonData.class);

if (pieJsonData.getStatus()==9){

int Fval = pieJsonData.getResult().getFinish_num().getVal();
int UFval = pieJsonData.getResult().getNo_finish_num().getVal();

int total=Fval+UFval;

if (total==0){
Log.i("获取学生作业的饼图数据::",total+"");
mPieData = getPieData(2,context,Fval,UFval);
//  showPieChart(pieChart, mPieData);
pieChart.setNoDataTextDescription("本周没有作业发布奥");//没有数据的时候显示

}else{
mPieData = getPieData(2,context,Fval,UFval);
showPieChart(pieChart, mPieData);
}

}

}
});

//pieChart.setNoDataTextDescription("本周没有作业发布奥");//没有数据的时候显示
}

/**
* 加载Recyclerview的逻辑
* @param context
* @param recyclerView
*/

@Override
public void initModule(final Context context, RecyclerView recyclerView) {
moduleList = new ArrayList<Module>();
moduleList.add(new Module("学习日志"));
moduleList.add(new Module("应用"));
moduleList.add(new Module("护眼"));
moduleList.add(new Module("防沉迷"));
moduleList.add(new Module("上网"));
moduleList.add(new Module("留言墙"));
moduleAdapter = new CommonAdapter<Module>(context, moduleList, R.layout.item_moduleadapter) {
@Override
public void convert(CommonViewHolder holder, Module list, int position) {

holder.setText(R.id.tv_modulename, moduleList.get(position).getName());

}
};
recyclerView.setAdapter(moduleAdapter);
moduleAdapter.setItemClickListener(new CommonAdapter.onRecyclerViewItemClickListener() {
@Override
public void OnItemClickListener(View view, int position) {

Toast.makeText(context,"点击"+moduleList.get(position),Toast.LENGTH_SHORT).show();

}
});
}

private void showPieChart(PieChart pieChart, PieData pieData) {
// 展示百分比
pieChart.setUsePercentValues(true);  //显示成百分比
pieChart.setDescription("");//给饼图设置名称
pieChart.setDrawSliceText(false);//设置隐藏饼图上文字，只显示百分比
pieChart.setDrawHoleEnabled(true);//去除掉透明
pieChart.setHoleColorTransparent(true);
pieChart.setHoleRadius(50f);  //半径
pieChart.setTransparentCircleRadius(55f); // 半透明圈
pieChart.setHoleColor(Color.parseColor("#F1F1F1"));//设置同心圆的颜色
// pieChart.setHoleRadius(0); //实心圆
pieChart.setTransparentCircleColor(Color.parseColor("#F7F7F7"));
pieChart.setTransparentCircleAlpha(110);
// mChart.setDrawYValues(true);
pieChart.setDrawCenterText(true);  //饼状图中间可以添加文字
pieChart.setRotationAngle(90); // 初始旋转角度
// 支持手动旋转true
pieChart.setRotationEnabled(true); // 可以手动旋转
pieChart.setCenterText("小明" + "\n" + "一周作业统计");  //饼状图中间的文字

//设置数据
pieChart.setData(pieData);

Legend mLegend = pieChart.getLegend();  //获取比例图
mLegend.setPosition(Legend.LegendPosition.RIGHT_OF_CHART);  //最右边显示
mLegend.setForm(Legend.LegendForm.CIRCLE);  //设置比例图的形状，默认是方形
mLegend.setXEntrySpace(7f);
mLegend.setYEntrySpace(5f);
mLegend.setTextSize(18);
mLegend.setEnabled(true);//设置比列图不可见
pieChart.animateXY(1000, 1000);  //设置动画
//设置分块的单击事件
pieChart.setOnChartValueSelectedListener(this);
//设置文字大小与颜色
pieData.getDataSet().setValueTextColor(Color.WHITE);
pieData.getDataSet().setValueTextSize(18);
}

private PieData getPieData(int count, Context context,int F,int U) {
ArrayList<String> xValues = new ArrayList<String>();//a饼图上要展示的内容
xValues.add("已做");
xValues.add("未做");
ArrayList<Entry> yValues = new ArrayList<Entry>();//每个饼块的实际数据
/*      // 饼图数据
*//**//**
* 将一个饼形图分成四部分， 四部分的数值比例为14:14:34:38
* 所以 14代表的百分比就是14%
*//**//**/
float quarterly1 = F;
float quarterly2 = U;
yValues.add(new Entry(quarterly1, 0));
yValues.add(new Entry(quarterly2, 1));
//y轴的集合
PieDataSet pieDataSet = new PieDataSet(yValues, "");//*显示在比例图上*//*
pieDataSet.setSliceSpace(0f); //设置个饼状图之间的距离
ArrayList<Integer> colors = new ArrayList<Integer>();
// 饼图颜色
//colors.add(Color.rgb(205, 205, 205));
colors.add(Color.parseColor("#18A15E"));
colors.add(Color.parseColor("#DB4538"));//
// colors.add(Color.rgb(57, 135, 200));
pieDataSet.setColors(colors);
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
float px = 5 * (metrics.densityDpi / 160f);
pieDataSet.setSelectionShift(px); // 选中态多出的长度
pieDataSet.setValueFormatter(new ValueFormatter() {
@Override
public String getFormattedValue(float value, Entry entry, int dataSetIndex, ViewPortHandler viewPortHandler) {
int n = (int) value;
String str = n + "%"; // 设置折线上显示数据的格式。如果不设置，将默认显示float数据格式。
return str;
}

});
PieData pieData = new PieData(xValues, pieDataSet);
return pieData;
}

@Override
public void onValueSelected(Entry e, int dataSetIndex, Highlight h) {

}

@Override
public void onNothingSelected() {

}
}

2.控制层：实现控制接口的方法，同时要包含一个视图层接口的引用和一个逻辑接口的引用，逻辑接口的引用要指向实现该接口的类

package presenter;

import biz.HomePageFragmentBiz;
import biz.HomePageFragmentContact;

/**
* Created by hcy on 2016/12/9.
*/

public class HomePagefragmentPresenter implements HomePageFragmentContact.HomePageFragmentPresenter {

private HomePageFragmentContact.HomePageFragmentView homePageFragmentView;

private HomePageFragmentContact.HomePageFragmentModel homePageFragmentModel;

public HomePagefragmentPresenter(HomePageFragmentContact.HomePageFragmentView homePageFragmentView) {
this.homePageFragmentView = homePageFragmentView;
homePageFragmentModel=new HomePageFragmentBiz();
}

@Override
public void initPie() {

homePageFragmentModel.initPie(homePageFragmentView.haveContext(),homePageFragmentView.havePieChart());

}

@Override
public void initModule() {
homePageFragmentModel.initModule(homePageFragmentView.haveContext(),homePageFragmentView.haveRecyclerView());
}
}

3.视图层，实现视图接口的方法，绑定view和初始化控制类：

package fragment;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.github.mikephil.charting.charts.PieChart;

import com.wyt.hcy.parentmanagerapp.R;

import biz.HomePageFragmentContact;
import divider.DividerGridItemDecoration;
import presenter.HomePagefragmentPresenter;

/**
* 首页
*/
public class HomePageFragment extends Fragment implements HomePageFragmentContact.HomePageFragmentView {

private RecyclerView rv_module;

private PieChart mPieChart;

private HomePagefragmentPresenter homePagefragmentPresenter;

public HomePageFragment() {

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_home_page, container, false);
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);

initUI(view);
initData();
}

private void initData() {
homePagefragmentPresenter = new HomePagefragmentPresenter(this);
initPieData();
initModule();
}

private void initModule() {

homePagefragmentPresenter.initModule();
}

private void initUI(View view) {
mPieChart = (PieChart) view.findViewById(R.id.pieChart);
rv_module = (RecyclerView) view.findViewById(R.id.rv_module);
rv_module.setLayoutManager(new GridLayoutManager(getContext(), 3));
rv_module.addItemDecoration(new DividerGridItemDecoration(getContext()));
}

private void initPieData() {
homePagefragmentPresenter.initPie();
}

@Override
public Context haveContext() {
return getContext();
}

@Override
public PieChart havePieChart() {
return mPieChart;
}

@Override
public RecyclerView haveRecyclerView() {
return rv_module;
}

}

RecyclerView的万能适配器：(在Listview完成适配器的基础上改的)

package utils;

import android.support.v7.widget.RecyclerView;
import android.util.SparseArray;
import android.view.View;
import android.widget.TextView;

/**
* Created by hcy on 2016/11/14.
* func:RecyclerView通用的ViewHolder
*/

public class CommonViewHolder extends RecyclerView.ViewHolder {

private final SparseArray<View> mViews;

private View mConvertView;

public CommonViewHolder(View itemView) {
super(itemView);
mConvertView = itemView;
this.mViews = new SparseArray<View>();
}

/**
* 通过控件的Id获取对于的控件，如果没有则加入views
*
* @param viewId
* @return
*/
public <T extends View> T findViewById(int viewId) {

View view = mViews.get(viewId);
if (view == null) {
view = mConvertView.findViewById(viewId);
mViews.put(viewId, view);
}
return (T) view;
}

//设置文本
public void setText(int textViewID, String text) {
TextView textView = findViewById(textViewID);
textView.setText(text);
}

}

package adapter;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.wyt.hcy.parentmanagerapp.R;

import java.util.List;

import utils.CommonViewHolder;

/**
* Created by hcy on 2016/12/5.
*/

public abstract class CommonAdapter<T> extends RecyclerView.Adapter<CommonViewHolder>{

private Context context;

private List<T>  list;

private int layoutId;

private LayoutInflater inflater;

private onRecyclerViewItemClickListener itemClickListener;

public void setItemClickListener(onRecyclerViewItemClickListener itemClickListener) {
this.itemClickListener = itemClickListener;
}

public CommonAdapter(Context context, List<T> list, int layoutId) {
this.context = context;
this.list = list;
this.layoutId = layoutId;

inflater=LayoutInflater.from(context);

}

@Override
public CommonViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new CommonViewHolder(inflater.inflate(layoutId,parent,false));
}

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

@Override
public void onBindViewHolder(final CommonViewHolder holder, int position) {
if (itemClickListener!=null){

holder.itemView.setBackgroundResource(R.drawable.recycler_bg);

holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//注意，这里的position不要用上面参数中的position，会出现位置错乱
itemClickListener.OnItemClickListener(holder.itemView, holder.getLayoutPosition());
}
});
}

convert(holder, list.get(position), position);
}

public interface  onRecyclerViewItemClickListener{
void OnItemClickListener(View view, int position);
}

public abstract void convert(CommonViewHolder holder,T list,int position);
}