그리드 뷰

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"
    tools:context=".MainActivity7_grid"
    android:orientation="vertical">

    <GridView
        android:id="@+id/gridView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:numColumns="4"/>

</LinearLayout>

 

dialog.xml

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

    <ImageView
        android:id="@+id/ivPoster"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"/>

</LinearLayout>

 

main.activity

public class MainActivity7_grid extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity7_grid);
        setTitle("그리드 뷰 영화 포스터");

        GridView gridView = findViewById(R.id.gridView1);
        MyGridAdapter  gridAdapter = new MyGridAdapter(this);
        gridView.setAdapter(gridAdapter);
    }

    class MyGridAdapter extends BaseAdapter {
        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,
                R.drawable.mov10,
                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,
                R.drawable.mov10,
        };

        Context context;
        public MyGridAdapter(Context context){
                this.context = context;
        }

        @Override
        public int getCount() {
            return posterID.length;
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return 0;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            ImageView imageView = new ImageView(context);
            imageView.setLayoutParams(new ViewGroup.LayoutParams(200,300));
            imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageView.setPadding(5,5,5,5);

            imageView.setImageResource(posterID[i]);

            imageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    AlertDialog.Builder dlg = new  AlertDialog.Builder(MainActivity7_grid.this);
                    View dialogView = View.inflate(MainActivity7_grid.this,
                            R.layout.dialog,null);

                    ImageView ivPoster = dialogView.findViewById(R.id.ivPoster);
                    ivPoster.setImageResource(posterID[i]);

                    dlg.setTitle("큰 포스터");
                    dlg.setView(dialogView);
                    dlg.setNegativeButton("닫기",null);
                    dlg.show();
                }
            });
            return imageView;
        }
    }
}

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결과 값