[Java] FrameLayout

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <Button
            android:id="@+id/btnRed"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="RED"
            android:textSize="24dp"
            android:onClick="onClick"/>

        <Button
            android:id="@+id/btnGreen"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="GREEN"
            android:textSize="24dp"
            android:onClick="onClick"/>

        <Button
            android:id="@+id/btnBlue"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="BLUE"
            android:textSize="24dp"
            android:onClick="onClick"/>

    </LinearLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:id="@+id/linearRed"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#FFBBBB"/>

        <LinearLayout
            android:id="@+id/linearGreen"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#BBFFBB"/>

        <LinearLayout
            android:id="@+id/linearBlue"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:background="#BBBBFF"/>

    </FrameLayout>

</LinearLayout>

activity_main.xml

 

 

 

 

 

 

MainActivity.java

package com.jwsoft.javaproject;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private LinearLayout linearRed;
    private LinearLayout linearGreen;
    private LinearLayout linearBlue;

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

        linearRed = findViewById(R.id.linearRed);
        linearGreen = findViewById(R.id.linearGreen);
        linearBlue = findViewById(R.id.linearBlue);
    }

    @Override
    public void onClick(View v) {
        linearRed.setVisibility(View.INVISIBLE);
        linearGreen.setVisibility(View.INVISIBLE);
        linearBlue.setVisibility(View.INVISIBLE);

        switch (v.getId()) {
            case R.id.btnRed:
                linearRed.setVisibility(View.VISIBLE);
                break;
            case R.id.btnGreen:
                linearGreen.setVisibility(View.VISIBLE);
                break;
            case R.id.btnBlue:
                linearBlue.setVisibility(View.VISIBLE);
                break;
        }
    }
}

실행 결과

 

RED 버튼 클릭 후

 

GREEN 버튼 클릭 후

 

BLUE 버튼 클릭 후