19_3 어댑터뷰 (그리드 뷰)

그리드 뷰 (GridView)

• 사진 또는 그림을 격자 모양으로 배치함

• 버튼 및 텍스트도 배치 가능(잘안씀)

• GridView의 속성 중 열 개수를 지정하는 "numColumns"을 넣어야 한다.

---

(xml)

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

(java)

package com.example.exam11_11;

import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

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

        final GridView gv = (GridView) findViewById(R.id.gridView1);
        MyGridAdapter gAdapter = new MyGridAdapter(this);
        gv.setAdapter(gAdapter);
    }

    public class MyGridAdapter extends BaseAdapter {
    // 베이스 어댑터를 상속받는 클래스 생성
        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, 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, 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 };

        public MyGridAdapter(Context c) { context = c; }

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

        public Object getItem(int position) { 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 GridView.LayoutParams(200, 300));
            imageview.setScaleType(ImageView.ScaleType.FIT_CENTER);
            imageview.setPadding(5, 5, 5, 5);

            imageview.setImageResource(posterID[position]);

            final int pos = position;
            imageview.setOnClickListener(new View.OnClickListener() {
                public void onClick(View v) {
                    View dialogView = (View) View.inflate(
                            MainActivity.this, R.layout.dialog, null);
                    AlertDialog.Builder dlg = new AlertDialog.Builder( MainActivity.this);
                    ImageView ivPoster = (ImageView) dialogView .findViewById(R.id.ivPoster);
                    ivPoster.setImageResource(posterID[pos]);
                    dlg.setTitle("큰 포스터");
                    dlg.setIcon(R.drawable.ic_launcher);
                    dlg.setView(dialogView);
                    dlg.setNegativeButton("닫기", null);
                    dlg.show();
                }
            });

            return imageview;
        }
    }
}