2-6-3 그리드뷰 사용하기

MainActivity

package com.example.boostcoursepractice;
 
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
 
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.GridView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
 
import com.google.android.material.snackbar.Snackbar;
 
import org.w3c.dom.Text;
 
import java.util.ArrayList;
 
public class MainActivity extends AppCompatActivity {
 
    SingerAdapter adapter;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        GridView gridView = (GridView) findViewById(R.id.grid_view);
 
        adapter = new SingerAdapter();
 
        adapter.addItem(new SingerItem("장주느", "010-5212-7024", R.drawable.ic_launcher_background));
        adapter.addItem(new SingerItem("장주느1", "010-52024", R.drawable.ic_launcher_background));
        adapter.addItem(new SingerItem("장주느2", "010-51-7024", R.drawable.ic_launcher_background));
        adapter.addItem(new SingerItem("장주느3", "0-5-7024", R.drawable.ic_launcher_background));
        adapter.addItem(new SingerItem("장주4", "010-59-7024", R.drawable.ic_launcher_background));
        adapter.addItem(new SingerItem("장주5", "-52 -7024", R.drawable.ic_launcher_background));
 
        gridView.setAdapter(adapter);
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                SingerItem item = (SingerItem) adapter.getItem(i);
                Toast.makeText(getApplicationContext(), item.toString(), Toast.LENGTH_LONG).show();
            }
        });
 
 
 
    }
 
    class SingerAdapter extends BaseAdapter
    {
        ArrayList<SingerItem> items = new ArrayList<SingerItem>() ;
 
        public void addItem(SingerItem item)
        {
            items.add(item);
        }
 
        @Override
        public int getCount() {
            return items.size();
        }
 
        @Override
        public Object getItem(int i) {
            return items.get(i);
        }
 
        @Override
        public long getItemId(int i) {
            return i;
        }
 
        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            SingerItemView singerItemView = null ;
 
            if(view == null)
            {
                singerItemView = new SingerItemView(getApplicationContext());
            }
            else
            {
                singerItemView = (SingerItemView) view;
            }
 
            SingerItem item = items.get(i) ;
            singerItemView.setName(item.getName());
            singerItemView.setMobile(item.getMobile());
            singerItemView.setImg(item.getResID());
 
            return singerItemView;
        }
    }
}
 

 

 

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리스트뷰랑 나머지는 다 같아서 생략

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그리드 뷰와 리스트뷰는 아예 사용법이 같다. 다만 그리드뷰의 속성 numColumns를 이용하면 원하는 열의 개수를 지정할 수 있다는 것만 차이가 있다.

 

 

결과화면