[Java] CoordinatorLayout + AppBarLayout + Toolbar + RecyclerView

CoordinatorLayout   +   AppBarLayout   +   Toolbar   +   RecyclerView

---

 

 

build.gradle (Module: app)

dependencies {
    implementation 'com.google.android.material:material:1.1.0'
}

CoordinatorLayout, AppBarLayout 는 머티리얼 디자인이므로 의존성 추가

 

 

 

 

 

 

 

res/values/styles.xml

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>

DarkActionBar 에서 NoActionBar 로 변경 (기본 타이틀바 없어짐)

 

 

 

 

 

 

 

 

recyclerview_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="top">

    <TextView
        android:id="@+id/txtView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="혀가 길지 않은 개발자"
        android:textSize="20dp"
        android:textStyle="bold"
        android:gravity="center"
        android:layout_alignParentTop="true" />

</RelativeLayout>

recyclerview_item

 

 

 

 

 

 

MyRecyclerView.java

package com.jwsoft.javaproject;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;

public class MyRecyclerView extends RecyclerView.Adapter<MyRecyclerView.MyViewHolder> {
    ArrayList<String> arrListData;

    public MyRecyclerView(ArrayList<String> data) {
        arrListData = data;
    }

    class MyViewHolder extends RecyclerView.ViewHolder {
        TextView txtView;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            txtView = itemView.findViewById(R.id.txtView);
        }
    }

    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        Context context = parent.getContext();
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.recyclerview_item, parent, false);
        MyViewHolder viewHolder = new MyViewHolder(view);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        holder.txtView.setText("혀가 길지 않은 개발자 " + arrListData.get(position));
    }

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

 

 

 

 

 

 

 

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout
    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"
    tools:context=".MainActivity">

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.appcompat.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_scrollFlags="scroll|enterAlways"
            app:title="혀가 길지 않은 개발자 CoordinatorLayout"/>

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

activity_main.xml

 

 

 

 

 

 

 

MainActivity.java

package com.jwsoft.javaproject;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    RecyclerView recyclerView;

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

        ArrayList<String> arrStrData = new ArrayList<>();
        for (int i=0; i<100; i++) {
            arrStrData.add(Integer.toString(i));
        }

        MyRecyclerView adapter = new MyRecyclerView(arrStrData);

        recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(
                this,
                RecyclerView.VERTICAL,
                false));
        recyclerView.setAdapter(adapter);
    }
}

실행 결과

 

위로 드래그 하는 중

 

타이틀 바가 사라질 때까지 드래그