Do it! 안드로이드 앱 프로그래밍 도전문제 3번, 두 개의 이미지뷰에 이미지 번갈아 보여주기

xml

 

* xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context=".MainActivity">


    <ScrollView
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="2"
        >

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

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

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

                    <ImageView
                        android:id="@+id/imageView1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content" />
                </LinearLayout>
            </HorizontalScrollView>
        </LinearLayout>
    </ScrollView>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1">

        <Button
            android:id="@+id/upButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="96dp"
            android:text="UP"
            android:onClick="upButtonClicked"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/downButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginEnd="68dp"
            android:text="DOWN"
            android:onClick="downButtonClicked"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/upButton"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="0dp"

        android:layout_weight="2">

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

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

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

                    <ImageView
                        android:id="@+id/imageView2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                         />
                </LinearLayout>
            </HorizontalScrollView>
        </LinearLayout>
    </ScrollView>

</LinearLayout>

 

* java

package org.techtown.button;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.media.Image;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ScrollView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    ImageView imageView1;
    ImageView imageView2;
    Button upButton;
    Button downButton;
    BitmapDrawable bitmap;

    int check = 1;

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

        imageView1 = findViewById(R.id.imageView1);
        imageView2 = findViewById(R.id.imageView2);
        upButton = findViewById(R.id.upButton);
        downButton = findViewById(R.id.downButton);

        Resources res = getResources();
        bitmap = (BitmapDrawable) res.getDrawable(R.drawable.image1);
        int bitmapWidth = bitmap.getIntrinsicWidth();
        int bitmapHeight = bitmap.getIntrinsicHeight();

        imageView1.setImageDrawable(bitmap);
        imageView1.getLayoutParams().width = bitmapWidth;
        imageView1.getLayoutParams().height = bitmapHeight;

        bitmap = (BitmapDrawable)res.getDrawable(R.drawable.image2);
        bitmapWidth = bitmap.getIntrinsicWidth();
        bitmapHeight = bitmap.getIntrinsicHeight();

        imageView2.setImageDrawable(bitmap);
        imageView2.getLayoutParams().width = bitmapWidth;
        imageView2.getLayoutParams().height = bitmapHeight;

        imageView1.setVisibility(View.INVISIBLE);
        imageView2.setVisibility(View.INVISIBLE);


    }

    public void upButtonClicked(View v){
        imageView1.setVisibility(View.VISIBLE);
        imageView2.setVisibility(View.INVISIBLE);
    }

    public void downButtonClicked(View v){
        imageView1.setVisibility(View.INVISIBLE);
        imageView2.setVisibility(View.VISIBLE);
    }


}