ListView 리스트뷰 연습1 - 아이템 단일선택, 다중선택가능
https://wonpaper.tistory.com/159?category=811923
ListView 리스트뷰 연습2 - 동적으로 아이템 추가 삭제
https://wonpaper.tistory.com/160?category=811923
이번에는 ListView 를 내가 원하는 xml 화면형식으로 ListView 에 올려 보도록 하자.
[ listview_item.xml ] - 한줄의 item 화면 구성하는 레이아웃 xml
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/imageView1"
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
<LinearLayout
android:orientation="vertical"
android:layout_weight="4"
android:layout_width="wrap_content"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:textSize="24dp"
android:textColor="#000000"
android:gravity="center_vertical"
android:layout_weight="2"
/>
<TextView
android:id="@+id/textView2"
android:text="New Text2"
android:textSize="16dp"
android:textColor="#666666"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
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[ activity_main.xml ]
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<?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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</LinearLayout>
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[ ListViewItem.java ] - item 객체모델
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import android.graphics.drawable.Drawable;
public class ListViewItem {
private Drawable iconDrawable;
private String title;
private String desc;
public void setIcon(Drawable icon) {
iconDrawable = icon;
}
public Drawable getIcon() {
return this.iconDrawable;
}
public void setTitle(String title) {
this.title = title;
}
public String getTitle() {
return this.title;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getDesc() {
return this.desc;
}
}
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그리고, 임의의 아이콘을 아이템별로 추가하려고 한다. Vector Image 형태로 간단히 만들어 보았다.
[ ListViewAdapter.java ] - 어댑터 생성
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import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
public class ListViewAdapter extends BaseAdapter {
private ArrayList<ListViewItem> listViewItemList = new ArrayList<ListViewItem>();
public ListViewAdapter() { }
// listviewitem 항목개수
@Override
public int getCount() {
return listViewItemList.size();
}
// position 위치의 item 값을 리턴
@Override
public Object getItem(int position) {
return listViewItemList.get(position);
}
// position 위치의 item 의 row id값 리턴
@Override
public long getItemId(int position) {
return position;
}
// position 위치의 item항목을 View 형식으로 얻어온다.
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final int pos = position;
final Context context = parent.getContext();
// listview_item의 layout을 inflate하여 xml을 view로 만들고 convertView 참조 획득
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.listview_item,parent,false);
}
// 화면에 표시될 View(Layout이 inflate된)으로부터 위젯에 대한 참조 획득
ImageView iconImageView = (ImageView) convertView.findViewById(R.id.imageView1);
TextView titleTextView = (TextView) convertView.findViewById(R.id.textView1);
TextView descTextView = (TextView) convertView.findViewById(R.id.textView2);
// Data Set (listViewItemList) 에서 position에 위치한 데이터참조 획득
ListViewItem listViewItem = listViewItemList.get(position);
// 아이템 내 각 위젯에 데이터 반영
iconImageView.setImageDrawable(listViewItem.getIcon());
titleTextView.setText(listViewItem.getTitle());
descTextView.setText(listViewItem.getDesc());
return convertView;
}
// item 데이터 추가
public void addItem(Drawable icon, String title, String desc) {
ListViewItem item = new ListViewItem();
item.setIcon(icon);
item.setTitle(title);
item.setDesc(desc);
listViewItemList.add(item);
}
// item 삭제
public void delItem(int position) {
listViewItemList.remove(position);
}
}
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[ MainActivity.java ]
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import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.content.ContextCompat;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setTitle("Custom ListView 예제");
ListView listView = findViewById(R.id.listView1);
ListViewAdapter adapter = new ListViewAdapter();
listView.setAdapter(adapter);
// 아이템 추가
adapter.addItem(ContextCompat.getDrawable(this,R.drawable.ic_android_black_24dp),"아이콘1번", "24dp Black");
adapter.addItem(ContextCompat.getDrawable(this,R.drawable.ic_camera_alt_black_24dp),"아이콘2번", "24dp Black");
adapter.addItem(ContextCompat.getDrawable(this,R.drawable.ic_card_membership_black_24dp),"아이콘3번", "24dp Black");
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
ListViewItem item = (ListViewItem) parent.getItemAtPosition(position);
String title = item.getTitle();
String desc = item.getDesc();
Drawable icon = item.getIcon();
String str = "id : " + Long.toString(id) + "\r\ntitle : " + title + "\r\ndesc : " + desc;
Toast.makeText(getApplicationContext(),str,Toast.LENGTH_SHORT).show();
}
});
}
}
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