MVP模式 + RecyclerView瀑布流 + 上拉加载、下拉刷新

首先导入一些用到的依赖：（不要忘记添加网络权限）

//  包括OKhttp网络请求、springview刷新加载、butterknife相当于findviewbyid、glide加载图片

//  recyclerview-flexibledivider分割线

compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.liaoinstan.springview:library:1.3.0'
compile 'com.jakewharton:butterknife:8.8.1'
compile 'com.google.code.gson:gson:2.8.1'
compile 'com.yqritc:recyclerview-flexibledivider:1.4.0'
compile 'com.github.bumptech.glide:glide:4.2.0'
annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
annotationProcessor 'com.github.bumptech.glide:compiler:4.2.0'

直接导入依赖会报错，这时候需要在最外部的Gradle的allprojects中导入：

maven { url 'https://maven.google.com' }

MVP模式：

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.bwie.mvprecyclerviewlogin.MainActivity">

<com.liaoinstan.springview.widget.SpringView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/springview">

<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recycleview"/>

</com.liaoinstan.springview.widget.SpringView>

</LinearLayout>

adapter.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">

<ImageView
android:scaleType="centerCrop"
android:id="@+id/adapter_imageview"
android:layout_width="wrap_content"
android:layout_height="100dp" />

</LinearLayout>

mainActivity

public class MainActivity extends AppCompatActivity implements RecyclerViewListener{
@BindView(R.id.recycleview)
RecyclerView recycleview;
@BindView(R.id.springview)
SpringView springview;
private RecyclerViewPresenter presenter;
private IAdapter adapter;
private StaggeredGridLayoutManager manager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//  设置头脚布局的刷新样式
springview.setHeader(new MeituanHeader(this));
springview.setFooter(new MeituanFooter(this));
//  得到控件，设置recyclerview的显示样式，为适配器赋值
presenter = new RecyclerViewPresenter(this);
manager = new StaggeredGridLayoutManager(3, LinearLayout.VERTICAL);
recycleview.setLayoutManager(manager);
adapter = new IAdapter(this);
recycleview.setAdapter(adapter);

HorizontalDividerItemDecoration horizontalDividerItemDecoration =  new HorizontalDividerItemDecoration.Builder(this)
.color(Color.RED)
//                .sizeResId(R.dimen.divider)
//                .marginResId(R.dimen.leftmargin, R.dimen.rightmargin)
.build() ;
//分割线
recycleview.addItemDecoration(horizontalDividerItemDecoration);

presenter.getData(true);

springview.setListener(new SpringView.OnFreshListener() {
@Override
public void onRefresh() {
presenter.getData(true);
}

@Override
public void onLoadmore() {
presenter.getData(true);
}
});
}

@Override
public void callBackSuccess(final Bean bean) {

runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.setData(bean);
springview.onFinishFreshAndLoad();
}
});
}

@Override
public void callBackFailure(int code) {

}
}

IAdapter

public class IAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private Context context;
private List<Bean.ListBean> list ;
private int itemWidth ;

public IAdapter(Context context) {
this.context = context;
Point point =  Utils.getDisplayInfomation(context);
itemWidth = point.x / 3 ;

}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.adapter, parent, false);
IViewHolder viewHolder = new IViewHolder(view);
return viewHolder;
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
if(holder instanceof IViewHolder){
IViewHolder iViewHolder = (IViewHolder)holder;
//        float scale =  (float) itemWidth / (float) list.get(position).getPicWidth()  ;
//        params.width = itemWidth;
//        params.height = (int)( (float)scale * (float)list.get(position).getPicHeight()) ;

LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) iViewHolder.adapterImageview.getLayoutParams() ;
params.width = itemWidth ;
int height =  new Random().nextInt(1000);
params.height =  height < 300 ? 300 : height ;

iViewHolder.adapterImageview.setLayoutParams(params);
//  请求网络图片
Glide.with(context).load(list.get(position).getPic()).into(iViewHolder.adapterImageview);
}
}

@Override
public int getItemCount() {
return list == null ? 0 : list.size();
}
//  数据
public void setData(Bean bean){
if(this.list == null){
this.list = new ArrayList<>();
}
this.list.addAll(bean.getList());
notifyDataSetChanged();
}

static class IViewHolder extends RecyclerView.ViewHolder {
@BindView(R.id.adapter_imageview)
ImageView adapterImageview;
IViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
}

Bean

public class Bean {

/**
* ret_code : 200
* ret_msg : ok
* list : [{"date":"111","id":1,"pic":"http://p1.pstatp.com/large/22c90001cf8b5388ce33","title":" \n他\u201c秘书圈\u201d的人数规模，赶上了周永康","type":1},{"date":"333","id":3,"pic":"http://p1.pstatp.com/list/190x124/e580016ab3624f1ed33","title":"家里的一分硬币现在值多少钱？\n家里的一分硬币现在值多少钱？\n家里的一分硬币现在值多少钱？\n家里的一分硬币现在值多少钱？\n家里的一分硬币现在值多少钱","type":1},{"date":"444","id":4,"pic":"http://p1.pstatp.com/origin/26ec0004cc0249b49e7c","title":"世界上\u201c最恐怖\u201d的景点大盘点，中国竟然排在第一！","type":1},{"date":"6666","id":6,"pic":"http://p3.pstatp.com/list/190x124/216d001357929b02f476","title":" \n张爱朋首回应白百何绯闻事件，短短二句话，白百何后悔看错了吧！","type":1},{"date":"8888","id":8,"pic":"http://p1.pstatp.com/list/190x124/191a00048757f6714455","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1},{"date":"99","id":9,"pic":"http://p3.pstatp.com/list/190x124/22c700036549c9b5ff07","title":"中国第一黑老大东北王乔四爷 最终也逃不过法网恢恢","type":1},{"date":"111","id":10,"pic":"http://p3.pstatp.com/list/190x124/22c6000628d79850e6d7","title":"号称中国关系最硬的人，奶奶是慈禧，大伯是光绪，哥哥是宣统！","type":1},{"date":"222","id":11,"pic":"http://p3.pstatp.com/list/190x124/22ca00011911b0a8061c","title":" \n\u201c二婚女和剩女，我该娶哪个啊？求救！\u201d","type":1},{"date":"2","id":18,"pic":"http://e.hiphotos.baidu.com/image/pic/item/bd315c6034a85edf392d2be340540923dc547549.jpg","title":"永创佳乐 专业蔬菜大棚/花卉大棚","type":1},{"date":"3","id":19,"pic":"http://c.hiphotos.baidu.com/image/pic/item/d000baa1cd11728ba5e562e2c1fcc3cec2fd2c22.jpg","title":"永创佳乐 专业蔬菜大棚/花卉大棚","type":1},{"date":"4","id":20,"pic":"http://e.hiphotos.baidu.com/image/pic/item/94cad1c8a786c91773f6c1f9c03d70cf3ac7577c.jpg","title":"永创佳乐 专业蔬菜大棚/花卉大棚","type":1},{"date":"5","id":21,"pic":"http://b.hiphotos.baidu.com/image/pic/item/32fa828ba61ea8d39c5a09c49e0a304e241f58f1.jpg","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1},{"date":"6","id":22,"pic":"http://a.hiphotos.baidu.com/image/pic/item/359b033b5bb5c9ea1dc17023dc39b6003af3b33b.jpg","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1},{"date":"7","id":23,"pic":"http://d.hiphotos.baidu.com/image/pic/item/38dbb6fd5266d0169a58eae99e2bd40734fa35a9.jpg","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1},{"date":"8","id":24,"pic":"http://h.hiphotos.baidu.com/image/pic/item/5bafa40f4bfbfbed34f348bf71f0f736aec31f43.jpg","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1},{"date":"9","id":25,"pic":"http://imgsrc.baidu.com/imgad/pic/item/9e3df8dcd100baa1706f8e964c10b912c8fc2e58.jpg","title":"中国又开工这一重大工程：连美国都造不出来 周边国家沉默不语","type":1}]
*/

private int ret_code;
private String ret_msg;
private List<ListBean> list;

public int getRet_code() {
return ret_code;
}

public void setRet_code(int ret_code) {
this.ret_code = ret_code;
}

public String getRet_msg() {
return ret_msg;
}

public void setRet_msg(String ret_msg) {
this.ret_msg = ret_msg;
}

public List<ListBean> getList() {
return list;
}

public void setList(List<ListBean> list) {
this.list = list;
}

public static class ListBean {
/**
* date : 111
* id : 1
* pic : http://p1.pstatp.com/large/22c90001cf8b5388ce33 * title :
他“秘书圈”的人数规模，赶上了周永康
* type : 1
*/

private String date;
private int id;
private String pic;
private String title;
private int type;

public String getDate() {
return date;
}

public void setDate(String date) {
this.date = date;
}

public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getPic() {
return pic;
}

public void setPic(String pic) {
this.pic = pic;
}

public String getTitle() {
return title;
}

public void setTitle(String title) {
this.title = title;
}

public int getType() {
return type;
}

public void setType(int type) {
this.type = type;
}
}
}

View层

RecyclerViewListener（接口）

public interface RecyclerViewListener {
public void callBackSuccess(Bean bean);
public void callBackFailure(int code);
}

Presenter层

RecyclerViewPresenter

public class RecyclerViewPresenter {

private RecyclerViewModel recyclerViewModel;
private RecyclerViewListener listener;
public RecyclerViewPresenter(RecyclerViewListener listener){
this.listener = listener;
this.recyclerViewModel = new RecyclerViewModel();
}
public void  getData(boolean up){
recyclerViewModel.getData(up, new RecyclerViewModelListener() {

a967
@Override
public void callbackSuccess(Bean bean) {
listener.callBackSuccess(bean);
}
@Override
public void callbackFalied(int code) {
listener.callBackFailure(code);
}
});
}
}

model层

RecyclerViewModel

public class RecyclerViewModel {
//  从网络获取数据
public void getData(boolean up, final RecyclerViewModelListener listener){
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("http://qhb.2dyt.com/Bwei/news?type=9&postkey=109rff1d1AK")
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
//  1 网络
listener.callbackFalied(1);
}

@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
Gson gson = new Gson();
Bean bean = gson.fromJson(result,Bean.class);
listener.callbackSuccess(bean);
}
});
}

}

RecyclerViewModelListener

public interface RecyclerViewModelListener {
public void callbackSuccess(Bean bean);
public void callbackFalied(int code);
}

utils工具类

public class Utils {

/**
* 获取设备屏幕尺寸
* @param context
* @return
*/
public static Point getDisplayInfomation(Context context){
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return new Point(dm.widthPixels,dm.heightPixels);
}

}