2022.10.18 11-2

activity_main.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">
    <Gallery
        android:id="@+id/gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
    <ImageView
        android:id="@+id/ivPoster"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/
 </LinearLayout >

MainActivity.java

package 
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;


public class MainActivity extends AppCompatActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setTitle("갤러리 영화 포스터");

        Gallery gallery = findViewById(R.id.gallery);

        MyGalleryAdapter galAdapter = new MyGalleryAdapter(this);
        gallery.setAdapter(galAdapter);
    }

    public class MyGalleryAdapter extends BaseAdapter {
        Context context;
        Integer[] posterId = { R.drawable.mov01, R.drawable.mov02,
                R.drawable.mov03, R.drawable.mov04, R.drawable.mov05,
                R.drawable.mov06, R.drawable.mov07, R.drawable.mov08,
                R.drawable.mov09};
        public MyGalleryAdapter(Context c) {
            context = c;
        }
        public int getCount() {
            return posterId.length;
        }
        public Object getItem(int arg0) {
            return null;
        }
        public long getItemId(int position) {
            return 0;
        }
        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView imageview = new ImageView(context);
            imageview.setLayoutParams(new Gallery.LayoutParams(140, 200));
            imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageview.setPadding(5, 5, 5, 5);
            imageview.setImageResource(posterId[position]);

            final int pos = position;
            imageview.setOnTouchListener(new View.OnTouchListener() {
                public boolean onTouch(View v, MotionEvent event) {
                    ImageView ivPoster = findViewById(R.id.ivPoster);
                    ivPoster.setScaleType(ImageView.ScaleType.FIT_CENTER);
                    ivPoster.setImageResource(posterId[pos]);
                    return false;
                }
            });
            return imageview;
        }
    }
}