[3] 두 개의 이미지 주고 받기.

1. 구현해야 할 것

 

 

 

 

2. java 소스코드

 

( 아래는 MainActivity.java의 코드이다. )

public class MainActivity extends AppCompatActivity {
    ImageView img1,img2;
    Button btn1, btn2;
    BitmapDrawable bd;

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

        img1 = findViewById(R.id.img1);
        img2 = findViewById(R.id.img2);
        btn1 = findViewById(R.id.btn1);
        btn2 = findViewById(R.id.btn2);

        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                img1.setVisibility(View.VISIBLE);
                img2.setVisibility(View.INVISIBLE);
                setImage(img1);
            }
        });

        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                img1.setVisibility(View.INVISIBLE);
                img2.setVisibility(View.VISIBLE);
                setImage(img2);
            }
        });
    }

    public void setImage(ImageView img){

        Resources res = getResources();
        bd = (BitmapDrawable) res.getDrawable(R.drawable.beach);
        int getWidth = bd.getIntrinsicWidth();
        int getHeight = bd.getIntrinsicHeight();

        img.setImageDrawable(bd);
        img.getLayoutParams().width = getWidth;
        img.getLayoutParams().height = getHeight;
    }
}

 

 

 

 

3. xml 소스코드

 

( 아래는 activity_main의 xml 코드이다. )

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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" >

    <HorizontalScrollView
        android:id="@+id/upLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@id/btnLayout"
        android:layout_alignParentTop="true">

        <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            tools:ignore="SpeakableTextPresentCheck">

            <ImageView
                android:id="@+id/img1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:srcCompat="@drawable/beach" />
        </ScrollView>
    </HorizontalScrollView>

    <LinearLayout
        android:id="@+id/btnLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="up" />

        <Button
            android:id="@+id/btn2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="down" />
    </LinearLayout>

    <HorizontalScrollView
        android:id="@+id/downLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/btnLayout"
        android:layout_alignParentBottom="true">

        <ScrollView
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            tools:ignore="SpeakableTextPresentCheck">

            <ImageView
                android:id="@+id/img2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="invisible"
                app:srcCompat="@drawable/beach" />
        </ScrollView>
    </HorizontalScrollView>
</RelativeLayout>

 

 

 

 

< 이미지는 아래의 파일을 다운 >

beach.zip

0.30MB