序言:上一篇述說了android架構層，本篇主要學習RecyclerView重新整理與載入，原理就是重新整理使用的是SwipeRefireshLayout，而載入更多是採用RecyclerView的滾動監聽(addOnScrollListener),

      1.第一步當然是先寫佈局啦

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
 
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/srf_mains"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
    <android.support.v7.widget.RecyclerView
android:id="@+id/rv_ab"
android
 
:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_blue_bright"/>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>

其中SwipeRefireshLayout是谷歌原生的重新整理控制元件，所以現在好多軟體都採用這種效果來重新整理資料，RecyclerView是

ListView和GridView的更新迭代產品，雖然程式碼相對複雜點，沒有setonImtemOnclickListener,只能在itemview設定或者設定回撥，但卻相對靈活，也很強大，能實現橫向，縱向，瀑布流等效果。

2.業務邏輯

public class Main2Activity extends AppCompatActivity {
    private List<String> list = new ArrayList<>();
MyViewAdapter myViewAdapter;
SwipeRefreshLayout srf_mains;
RecyclerView rv_ab;
@TargetApi(Build.VERSION_CODES.M)
    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
//初始化檢視
initView();
//業務邏輯
initData();
}



    private void initView() {
        srf_mains = (SwipeRefreshLayout) findViewById(R.id.srf_mains);
rv_ab = (RecyclerView) findViewById(R.id.rv_ab);
}
    private void initData() {
        //給集合建立假資料
for (int i=0;i<20;i++){
            list.add("第"+i+"條資料");
}
        //設定recyclerview的樣式，這裡採用縱向線性樣式
rv_ab.setLayoutManager(new LinearLayoutManager(this));
//建立介面卡
myViewAdapter = new MyViewAdapter();
//設定設配器
rv_ab.setAdapter(myViewAdapter);
//SwipeRefreshLayout設定重新整理監聽，這裡模擬集合資料清空，重新新增
srf_mains.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
public void onRefresh() {
                if (list.size()>0){
                    list.clear();
                    for (int i=0;i<20;i++){
                        list.add("第"+i+"條資料");
}
                }
                myViewAdapter.notifyDataSetChanged();
srf_mains.setRefreshing(false);
ToastUtils.show(Main2Activity.this,"重新整理成功");
}
        });
//recyclerview設定滾動監聽，當到達最底部時分頁載入資料，重新整理介面卡
rv_ab.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                if(newState == RecyclerView.SCROLL_STATE_IDLE){
                    list.add(list.size()-1,"底部");
myViewAdapter.notifyDataSetChanged();
}
            }

        });
}

private class MyViewAdapter extends RecyclerView.Adapter<MyViewAdapter.MyViewHolder> {
    @Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType==0){
            return new MyViewHolder(LayoutInflater.from(Main2Activity.this).inflate(R.layout.item_view, parent, false));
}
        return new MyViewHolder(LayoutInflater.from(Main2Activity.this).inflate(R.layout.item_views, parent, false));
}

    @Override
public int getItemViewType(int position) {
        if (position==list.size()-1){
            return 1;
}
        return 0;
}

    @Override
public void onBindViewHolder(MyViewHolder holder, int position) {
        if (position!=list.size()-1){
            holder.tv_iteme.setText(list.get(position));
}


    }

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

    public class MyViewHolder extends RecyclerView.ViewHolder {
        TextView tv_iteme;
        public MyViewHolder(View itemView) {
            super(itemView);
tv_iteme = (TextView) itemView.findViewById(R.id.tv_iteme);
}
    }
}