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첫번째 예제는 ListView에 있는 단어 중 하나를 선택하면.. 상단에 있는 TextView에 해당 단어를 보여주는 간단한 예제입니다. 





사용한 레이아웃 구조는 간단합니다. 리스트뷰에서 선택된 아이템을 보여줄 TextView와  단어 목록을 출력해 줄 리스트뷰로 구성됩니다.


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:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="@dimen/activity_vertical_margin"
    tools:context="com.tistory.webnautes.listviewexample.MainActivity">
 
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/selected_item_textview"
        android:background="@android:color/holo_blue_light"
        android:text="아래 목록에서 선택하세요!"/>
 
    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/listview"/>
</LinearLayout>
 
cs



MainActivity.java


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package com.tistory.webnautes.listviewexample;
 
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
 
import java.util.ArrayList;
import java.util.List;
 
public class MainActivity extends AppCompatActivity {
 
    private TextView selected_item_textview;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        ListView listview = (ListView)findViewById(R.id.listview);
        selected_item_textview = (TextView)findViewById(R.id.selected_item_textview);
 
 
        //데이터를 저장하게 되는 리스트
        List<String> list = new ArrayList<>();
 
        //리스트뷰와 리스트를 연결하기 위해 사용되는 어댑터
        ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_1, list);
 
        //리스트뷰의 어댑터를 지정해준다.
        listview.setAdapter(adapter);
 
 
        //리스트뷰의 아이템을 클릭시 해당 아이템의 문자열을 가져오기 위한 처리
        listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 
            @Override
            public void onItemClick(AdapterView<?> adapterView,
                                    View view, int position, long id) {
 
                //클릭한 아이템의 문자열을 가져옴
                String selected_item = (String)adapterView.getItemAtPosition(position);
 
                //텍스트뷰에 출력
                selected_item_textview.setText(selected_item);
            }
        });
 
 
        //리스트뷰에 보여질 아이템을 추가
        list.add("사과");
        list.add("배");
        list.add("귤");
        list.add("바나나");
      
    }
}
 
cs






두번째 예제는 목록에서 원하는 항목들을 선택한 후... 결과보기 버튼을 클릭하면 다이얼로그에 선택한 목록을 보여주는 예제입니다.




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:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="@dimen/activity_vertical_margin"
    tools:context="com.tistory.webnautes.listviewexample.MainActivity">
 
    <TextView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.1"
        android:id="@+id/selected_item_textview"
        android:background="@android:color/holo_blue_light"
        android:text="아래 목록에서 선택하세요!"/>
 
    <ListView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:drawSelectorOnTop="false"
        android:choiceMode="multipleChoice"
        android:layout_weight="0.8"
        android:id="@+id/listview"/>
 
    <Button
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="0.1"
        android:text="결과보기"
        android:id="@+id/result_button"/>
</LinearLayout>
 
cs



MainActivity.java


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package com.tistory.webnautes.listviewexample;
 
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
 
import java.util.ArrayList;
import java.util.List;
 
public class MainActivity extends AppCompatActivity {
 
    ListView listview;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        listview = (ListView)findViewById(R.id.listview);
 
        //데이터를 저장하게 되는 리스트
        List<String> list = new ArrayList<>();
 
        //리스트뷰와 리스트를 연결하기 위해 사용되는 어댑터
        ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_multiple_choice, list);
 
        //리스트뷰의 어댑터를 지정해준다.
        listview.setAdapter(adapter);
 
 
        //리스트뷰에 보여질 아이템을 추가
        list.add("사과");
        list.add("배");
        list.add("귤");
        list.add("바나나");
 
 
        Button result_button = (Button)findViewById(R.id.result_button);
 
        result_button.setOnClickListener(new View.OnClickListener(){
 
            @Override
            public void onClick(View view) {
                final List<String> selectedItems = new ArrayList<>();
 
                //리스트뷰에서 선택된 아이템의 목록을 가져온다.
                SparseBooleanArray checkedItemPositions = listview.getCheckedItemPositions();
                forint i=0; i<checkedItemPositions.size(); i++){
                    int pos = checkedItemPositions.keyAt(i);
 
                    if (checkedItemPositions.valueAt(i))
                    {
                        selectedItems.add(listview.getItemAtPosition(pos).toString());
                    }
                }
 
                final CharSequence[] items = selectedItems.toArray(new String[selectedItems.size()]);
 
 
                //다이얼 로그에 가져온 목록을 보여준다.
                AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(MainActivity.this);
                dialogBuilder.setTitle("선택한 아이템 목록");
                dialogBuilder.setItems(items, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int pos) {
                        String selectedText = items[pos].toString();
                        Toast.makeText(MainActivity.this, selectedText, Toast.LENGTH_SHORT).show();
                    }
                });
 
                AlertDialog alertDialogObject = dialogBuilder.create();
                alertDialogObject.show();
            }
        });
 
    }
}
 
cs


문제 발생시 지나치지 마시고 댓글 남겨주시면 가능한 빨리 답장드립니다.


제가 쓴 책도 한번 검토해보세요 ^^

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