開發中如果遇到介面比較複雜的情況，可以考慮封裝成一個個單獨的View, 把邏輯封裝到每個單獨的View中，減少activity或fragment裡的程式碼，便於管理程式碼。
一般這種自定義View繼承自FrameLayout就好。
實現效果如下圖，是一個橫向滑動的recyclerview( 並把recyclerview的item的點選事件暴露出來了)，結果是activity 中關於recyclerview的邏輯程式碼毛都沒有，把activity脫光光;

下面直接上程式碼
MainActivity裡的程式碼（毛都沒有，就是這麼光溜溜）

public class MainActivity
 
 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

activity_main佈局檔案(只包含一個封裝的view的佈局)

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
 
 xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft
 
="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.febmaple.customviewtest.MainActivity">

    <com.febmaple.customviewtest.MyCustomView
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:padding="10dp">

    </com.febmaple.customviewtest.MyCustomView>
</RelativeLayout>

開始我們封裝的View

public class MyCustomView extends FrameLayout implements MyCustomViewAdapter.onItemClickListener {
    private View viewChild;
    private Context mContext;
    private LayoutInflater layoutInflater;
    private MyCustomViewAdapter adapter;
    private List<String> mList = new ArrayList<>();

    public MyCustomView(Context context) {
        this(context, null);
    }

    public MyCustomView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MyCustomView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        layoutInflater = LayoutInflater.from(context);
        initViews();
        initData();
        addView(viewChild);//給自定義view新增內容view
    }
//以上三個構造方法是關鍵
    private RecyclerView rvTest;

    private void initViews() {
        viewChild = layoutInflater.inflate(R.layout.customview_item, null);
        rvTest = (RecyclerView) viewChild.findViewById(R.id.rv_test);
        rvTest.setLayoutManager(new LinearLayoutManager(mContext, LinearLayoutManager.HORIZONTAL, false));
    }

    private void initData() {
        for (int i = 0; i < 10; i++) {
            mList.add("nimadan" + i);
        }
        adapter = new MyCustomViewAdapter(mContext, mList);
        adapter.setOnItemClickListener(this);//利用監聽器模式把recyclerview的點選事件暴露出來。
        rvTest.setAdapter(adapter);
        adapter.notifyDataSetChanged();
    }

    @Override
    public void onItemClick(int position) {
        Toast.makeText(mContext, "nima" + position, Toast.LENGTH_SHORT).show();
    }
}

MyCustomView的佈局

<?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="100dp"
    android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rv_test"
        android:layout_width="match_parent"
        android:layout_height="100dp">

    </android.support.v7.widget.RecyclerView>
</LinearLayout>

MyCustomView中recyclerview的adapter

public class MyCustomViewAdapter extends RecyclerView.Adapter<MyCustomViewAdapter.MyViewHolder> {
    private static Context mContext;
    private LayoutInflater mLayoutInflater;
    private List<String> mRankList;

    public MyCustomViewAdapter(Context context, List<String> ranklist) {
        mContext = context;
        mRankList = ranklist;
        mLayoutInflater = LayoutInflater.from(context);
    }

//    public void updataAdapter(ArrayList<String> newList) {
//        mRankList = newList;
//        notifyDataSetChanged();
//    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new MyViewHolder(mLayoutInflater.inflate(R.layout.rv_item, parent, false));
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.bindData(mRankList, position);
    }

    @Override
    public int getItemCount() {
        return mRankList == null ? 0 : mRankList.size();
    }

    private static onItemClickListener itemClickListener;

    public static class MyViewHolder extends RecyclerView.ViewHolder {
        private TextView tv_rv_item;

        public MyViewHolder(View itemView) {
            super(itemView);
            initView(itemView);
        }

        private void initView(View itemView) {
            tv_rv_item = (TextView) itemView.findViewById(R.id.tv_rv_item);
        }

        public void bindData(List<String> aRankList, final int position) {
            tv_rv_item.setText(aRankList.get(position));
            tv_rv_item.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (itemClickListener != null) {
                        itemClickListener.onItemClick(position);
                    }
                }
            });
        }

    }

    public interface onItemClickListener {
        public void onItemClick(int position);
    }

    public void setOnItemClickListener(onItemClickListener listener) {
        itemClickListener = listener;
    }
}