1，MainActivity的xml布局
<?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=".MainActivity">

<com.example.tiamo.weeklianxi.view.HeadView
android:id="@+id/headview"
android:layout_width="match_parent"
android:layout_height="wrap_content">

</com.example.tiamo.weeklianxi.view.HeadView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#fff"
android:text="销量"
/>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#fff"
android:text="销量"
/>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#fff"
android:text="销量"
/>
<Button
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="#fff"
android:text="销量"
/>
</LinearLayout>

<com.jcodecraeer.xrecyclerview.XRecyclerView
android:id="@+id/xresycle"
android:layout_width="match_parent"
android:layout_height="match_parent">

</com.jcodecraeer.xrecyclerview.XRecyclerView>

</LinearLayout>
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2.MainActivity
public class MainActivity extends AppCompatActivity implements IView {

private IPersenterImpl iPersenter;
String path ="searchProducts";
private XRecyclerView xRecyclerView;
HeadView headView;
private BeanAdapter adapter;
private int page;
private boolean isLinear = true;
private Object message;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iPersenter = new IPersenterImpl(this);
page = 1;
init();
//注册
EventBus.getDefault().register(this);

}

private void init() {
xRecyclerView = findViewById(R.id.xresycle);
headView = findViewById(R.id.headview);

//点击头部进行切换
headView.setOnClick(new HeadView.OnClick() {
@Override
public void Click() {
List<GoodsBean.DataBean> data = adapter.getData();
changeLiGr();
adapter.setData(data);
}
});
//改变头部文字重新请求
headView.setGetEdText(new HeadView.getEdText() {
@Override
public void getName(String name) {
page = 1;
initData(name,page);
}
});

//刷新加载
xRecyclerView.setLoadingMoreEnabled(true);
xRecyclerView.setPullRefreshEnabled(true);
changeLiGr();
xRecyclerView.setLoadingListener(new XRecyclerView.LoadingListener() {
@Override
public void onRefresh() {
page = 1;
initData(message+"",page);
}

@Override
public void onLoadMore() {
initData(message+"",page);
}
});

}
//改变状态
private void changeLiGr(){
if (isLinear){
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
xRecyclerView.setLayoutManager(layoutManager);
}else{
GridLayoutManager manager = new GridLayoutManager(this,2);
manager.setOrientation(LinearLayoutManager.VERTICAL);
xRecyclerView.setLayoutManager(manager);
}
adapter = new BeanAdapter(this,isLinear);
xRecyclerView.setAdapter(adapter);
adapter.setOnClick(new BeanAdapter.OnClick() {
@Override
public void click(int pid) {
Intent intent = new Intent(MainActivity.this,LoginActivity.class);
intent.putExtra("pid",pid);
startActivity(intent);
}
});
//状态反选
isLinear = !isLinear;
}

//请求
private void initData(String name,int page) {
Map<String,String> pamars = new HashMap<>();
pamars.put("keywords",name);
pamars.put("page",page+"");
iPersenter.showRequestData(path,pamars,GoodsBean.class);
}

//得到粘性事件
@Subscribe(threadMode = ThreadMode.MAIN,sticky = true)
public void getName(EventBusBean eventBusBean){
if (eventBusBean.getId() == 1) {
message = eventBusBean.getMessage();
initData(eventBusBean.getMessage().toString(), page);
}
}

@Override
public void startRequestData(Object data) {
if (data instanceof GoodsBean){
GoodsBean bean = (GoodsBean) data;
if (page == 1){
adapter.setData(bean.getData());
}else{
adapter.addData(bean.getData());
}
page++;
xRecyclerView.refreshComplete();
xRecyclerView.loadMoreComplete();;
}
}

//解绑
@Override
protected void onDestroy() {
super.onDestroy();
iPersenter.onDestory();
EventBus.getDefault().unregister(this);
}
}

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