구현할 내용

• 기기 외장공간에 저장된 녹음 파일 (*.m4a) 불러오기
• ListView 형식으로 목록 나타내기

1. song_item.xml

• 리스트를 구현하는 xml을 생성
• 아래는 예시일 뿐, 자유롭게 만들면 된다

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/child_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="15dp"
    android:paddingLeft="10dp"
    android:paddingRight="10dp" >

    <ImageView
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_gravity="center"
        android:src="@drawable/resulticon" />

    <ImageView
        android:id="@+id/album_Image"
        android:layout_width="60dp"
        android:layout_height="45dp"
        android:layout_gravity="center"
        android:src="@mipmap/person_round" />

    <LinearLayout
        android:layout_width="100dp"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_weight="4"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/txt_title"
            android:layout_width="match_parent"
            android:layout_height="30dp"
            android:text="타이틀"
            android:textStyle="bold"
            android:gravity="bottom"
            />
        <TextView
            android:id="@+id/txt_duration"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="재생길이"
            android:textColor="@color/gray2"
            android:gravity="top"
            />

    </LinearLayout>

    <LinearLayout
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:layout_gravity="center"
        android:orientation="vertical"
        android:paddingTop="10dp">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="35dp"
            android:src="@mipmap/calling_round"
            >
        </ImageView>

        <TextView
            android:id="@+id/txt_subtitle"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="통화시각"
            android:textSize="4pt"
            android:textColor="@color/gray2"
            />

    </LinearLayout>

</LinearLayout>

---

2. activity_call_list.xml

• CallListActivity에서 생성된 UI
• 자잘한 코드는 모두 생략

<?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"
    android:orientation="vertical"
    tools:context=".CallListActivity"
    android:id="@+id/containers2">

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"/>


</LinearLayout>

---

3. CallListActivity.java

• 리스트뷰와 xml UI를 연결시킨다

- 기본 세팅

private ListView audiolistView; // 리스트뷰
private ArrayList<CallListActivity.Song_Item> songsList = null; // 데이터 리스트
private CallListActivity.ListViewAdapter listViewAdapter = null; // 리스트뷰에 사용되는 ListViewAdapter
Context context;
    
class ViewHolder {
        public ImageView mImgAlbumArt;
        public TextView mTitle;
        public TextView mSubTitle;
        public TextView mDuration;
}

public class Song_Item {
        private String Title; // 타이틀 정보
        private long Duration; // 재생시간
        private String DataPath; // 실제 데이터 위치

        public Song_Item() {        }
        public String getTitle() {
            return Title;        }
        public void setTitle(String title) {
            Title = title;        }
        public long getDuration() {
            return Duration;        }
        public void setDuration(long duration) {
            Duration = duration;        }
        public void setDataPath(String dataPath) {
            DataPath = dataPath;        }
    }

- ListViewAdapter

• Adapter가 리스트뷰를 나타내게 도와줌

private class ListViewAdapter extends BaseAdapter {
        Context context;

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

        // 음악 데이터 추가를 위한 메소드
        public void addItem(String Title, long Duration,String DataPath) {
            CallListActivity.Song_Item item = new CallListActivity.Song_Item();
            item.setTitle(Title);
            item.setDuration(Duration);
            item.setDataPath(DataPath);
            songsList.add(item);
        }

        @Override
        public int getCount() {
            return songsList.size(); // 데이터 개수 리턴
        }

        @Override
        public Object getItem(int position) {
            return songsList.get(position);
        }

        // 지정한 위치(position)에 있는 데이터 리턴
        @Override
        public long getItemId(int position) {
            return position;
        }

        // position에 위치한 데이터를 화면에 출력하는데 사용될 View를 리턴
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            final CallListActivity.ViewHolder viewHolder;
            final Context context = parent.getContext();
            final Integer index = Integer.valueOf(position);

            // 화면에 표시될 View
            if(convertView == null){
                viewHolder = new CallListActivity.ViewHolder();

                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.song_item,parent,false);

                convertView.setBackgroundColor(0x00FFFFFF);
                convertView.invalidate();

                // 화면에 표시될 View 로부터 위젯에 대한 참조 획득
                viewHolder.mImgAlbumArt = (ImageView) convertView.findViewById(R.id.album_Image);
                viewHolder.mTitle = (TextView) convertView.findViewById(R.id.txt_title);
                viewHolder.mSubTitle = (TextView) convertView.findViewById(R.id.txt_subtitle);
                viewHolder.mDuration = (TextView) convertView.findViewById(R.id.txt_duration);

                convertView.setTag(viewHolder);
            } else {
                viewHolder = (CallListActivity.ViewHolder) convertView.getTag();
            }

            // PersonData 에서 position 에 위치한 데이터 참조 획득
            final CallListActivity.Song_Item songItem = songsList.get(position);

            String titlename = songItem.getTitle();
            int namelen = titlename.length();
            viewHolder.mTitle.setText(titlename.substring(0,namelen-14));
            Log.d("TEST : ", titlename.substring(namelen-5,namelen-3));
            int hh = Integer.parseInt(titlename.substring(namelen-4,namelen-2));
            int mm = Integer.parseInt(titlename.substring(namelen-2));
            String ampm;
            if (hh > 12){
                hh = hh - 12;
                ampm = "오후";
            } else{
                ampm = "오전";
            }
            viewHolder.mSubTitle.setText(ampm+" "+hh+":"+mm);

            int dur = (int) songItem.getDuration();
            int hrs = (dur / 3600000);
            int mns = (dur / 60000) % 60000;
            int scs = dur % 60000 / 1000;
            String songTime = String.format("%02d:%02d:%02d", hrs,  mns, scs);
            if(hrs == 0){
                songTime = String.format("%02d:%02d", mns, scs);
            }
            viewHolder.mDuration.setText(songTime);

            return convertView;
        }
    }

---

- loadAudio

• 파일 리스트의 정보를 가져온다

private void loadAudio() {
        ContentResolver contentResolver = getContentResolver();

        Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        String selection = MediaStore.Audio.Media.IS_MUSIC + "== 0";
        String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";
        Cursor cursor = contentResolver.query(uri, null, selection, null, sortOrder);
        cursor.moveToFirst();

        if (cursor != null && cursor.getCount() > 0) {
            do {
                String title = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE));
                long mDuration = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DURATION));
                String datapath = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
                listViewAdapter.addItem(title,mDuration,datapath);
            } while (cursor.moveToNext());
        }
        cursor.close();
    }

---

- onCreate

• 화면이 시작되면 진행
• 앞서 작성한 클래스와 함수들을 사용하게 된다

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_call_list);

        context = this.getBaseContext();
        songsList = new ArrayList<CallListActivity.Song_Item>(); // ArrayList 생성
        audiolistView = (ListView) findViewById(R.id.listView);
        listViewAdapter = new CallListActivity.ListViewAdapter(this); // Adapter 생성
        audiolistView.setAdapter(listViewAdapter); // 어댑터를 리스트뷰에 세팅
        audiolistView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        loadAudio();
    }