RecycleView的多条目展示及原生下拉的刷新

RecycleView的多条目适配，有几种类型创建几种布局，根据值判断返回的类型。

1、适配器的创建：

/**
*
创建适配器
*
Created by lenovo on 2017/4/24.
*/

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
//定义常量
private final int TYPE_0=0;
private final int TYPE_1=1;
ArrayList<String> lists;
Context context;
public MyAdapter(Context context, ArrayList<String> lists) {
this.lists=lists;
this.context=context;
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType==TYPE_0){
View view=View.inflate(context,R.layout.list0_layouts,null);
return new MyViewHolder(view);
}else {
View view=View.inflate(context,R.layout.list_layout,null);
return new MyViewHolder1(view);
}
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
//判断
if(holder instanceof MyViewHolder){
((MyViewHolder) holder).text_0.setText(lists.get(position));
((MyViewHolder) holder).text_0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context,
"这是"+position, Toast.LENGTH_SHORT).show();
}
});

}if(holder instanceof MyViewHolder1){
((MyViewHolder1) holder).text_1.setText(lists.get(position));
((MyViewHolder1) holder).text_1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context,
"这是"+position, Toast.LENGTH_SHORT).show();
}
});
}
}

@Override
public int getItemCount() {
return lists.size();
}
//判断返回的类型：
@Override
public int getItemViewType(int position) {
if(position%3==0){
return TYPE_1;
}else {
return TYPE_0;
}
}
//根据不同的类型声明对应的ViewHolder
class MyViewHolder extends RecyclerView.ViewHolder{

private final TextView text_0;

public MyViewHolder(View itemView) {
super(itemView);
//声明控件
text_0 = (TextView) itemView.findViewById(R.id.text_0);
//设置点击事件

}
}
//根据不同的类型声明对应的ViewHolder
class MyViewHolder1 extends RecyclerView.ViewHolder{

private final TextView text_1;

public MyViewHolder1(View itemView) {
super(itemView);
text_1 = (TextView) itemView.findViewById(R.id.text_1);
}
}
}

2.在MainActivity中操作：
public class MainActivity extends AppCompatActivity {
private int num=0;
private ArrayList<String> lists;
private RecyclerView rv;
private MyAdapter adapter;
private ArrayList<String> arrayList=new ArrayList<>();
private ProgressBar pb;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化控件
initViews();

}

private void initViews() {
rv = (RecyclerView) findViewById(R.id.rv);
pb = (ProgressBar) findViewById(R.id.pb);
//设置布局管理者
rv.setLayoutManager(new LinearLayoutManager(this));
//设置适配器
getAdapterDatas();

//设置监听
rv.addOnScrollListener(new
RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {

if (newState==RecyclerView.SCROLL_STATE_IDLE){
RecyclerView.LayoutManager manager = rv.getLayoutManager();
if(manager instanceof LinearLayoutManager){
int position = ((LinearLayoutManager) manager).findLastVisibleItemPosition();
if(position==(arrayList.size()-1)){
num+=15;
getAdapterDatas();//调用刷新方法
//设置进度条
pb.setVisibility(View.VISIBLE);
//进行发送handler，让进度条进行显示的时间
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
pb.setVisibility(View.GONE);
}
},3000);

}
}
}
super.onScrollStateChanged(recyclerView, newState);

}

@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);

}
});

}
//建立一个刷新适配器的方法
private void getAdapterDatas(){
//设置数据
lists = new ArrayList<>();
for (int i=0;i<num+15;i++){
lists.add("name "+i+"");
}
for (int i = num; i <lists.size() ; i++) {
arrayList.add(lists.get(i));
}
if(adapter==null){
adapter = new MyAdapter(MainActivity.this, arrayList);
rv.setAdapter(adapter);
}else {
adapter.notifyDataSetChanged();//刷新
}
}
}