android 美团二级联动,仿美团外卖两个RecyclerView联动与悬浮效果（最讨厌嵌套了）...

想写好久了，第一篇博客，先上效果图

image.png

话不多说，不瞎逼逼，上代码

先看看xml.

android:orientation="horizontal" android:layout_width="match_parent"

android:background="@color/white"

android:layout_height="match_parent">

android:id="@+id/a"

android:layout_width="0dp"

android:layout_height="match_parent"

android:layout_weight="1"

android:scrollbars="none">

android:layout_width="0dp"

android:layout_height="match_parent"

android:layout_weight="3">

android:id="@+id/a_b"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:scrollbars="none">

android:id="@+id/ll_group"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="@color/colorPrimary"

android:orientation="vertical">

android:id="@+id/tv_group_name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:paddingTop="10dp"

android:paddingBottom="10dp"

android:textColor="@color/white"

/>

这里的textview就是悬浮的效果

看activity代码：

package com.example.kun.recyclerview;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.support.annotation.Nullable;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.view.View;

import android.widget.LinearLayout;

import android.widget.TextView;

import com.example.kun.recyclerview.Adapter.AAdapter;

import com.example.kun.recyclerview.Adapter.A_B_Adapter;

import com.example.kun.recyclerview.View.UnKnowNameActivity;

import com.example.kun.recyclerview.constant.ItemEntity;

import java.util.ArrayList;

import java.util.List;

import butterknife.BindView;

import butterknife.ButterKnife;

/**

* Created by Kun on 2017/9/7.

*/

public class RenXingActivity extends Activity {

@BindView(R.id.a)

RecyclerView a;

@BindView(R.id.a_b)

RecyclerView aB;

@BindView(R.id.tv_group_name)

TextView tvGroupName;

@BindView(R.id.ll_group)

LinearLayout llGroup;

private List list = new ArrayList<>();

private AAdapter a_Adapter;

private A_B_Adapter a_B_Adapter;

private LinearLayoutManager aLinerLayoutManager;

private LinearLayoutManager a_bL