カスタムAndroid ListView ArrayAdapter（複数のonClickEventListenersを持つ場合）のデータをフラグメント/アクティビティに戻す方法

Question

このカスタムArrayAdapter内部のデータ（videoId）を、ユーザーがクリックすると保持するフラグメントに戻す必要がありますお気に入りのボタンに。

また、ユーザーが曲のレイアウトをクリックすると、曲の位置のデータをフラグメントに戻す必要があります。 （両方onclicksは以下に定義）

まで、歌の位置は、この方法を介し含有フラグメントSelectSongFragmentに渡された：私はarrayAdapterにonclickのリスナーを追加し

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
@Override 
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { 
//pass data to main activity 
//TODO THIS NO LONGER RUNS 
String songUrl = urlCleaner.parseIntoUrl(mSongs.getSong(i).getVideoId(), false); 
passData(songUrl); 
} 
}); 

後、mListView.setOnItemClickListenerが停止しました今、私はデータを返す方法がありません！下の私のカスタムArrayAdapterをチェックし、 "HELP NEEDED HERE"を探してください。ありがとうございます！

public class SelectSongArrayAdapter extends ArrayAdapter<Song> implements AppInfo { 

private ArrayList<Song> songs; 
private ArrayList<String> mFavoriteSongs; 
private boolean isFavorite = false; 
private Song song; 

/** 
* Override the constructor for ArrayAdapter 
* The only variable we care about now ArrayList<PlatformVersion> objects 
* it is the list of the objects we want to display 
* 
* @param context 
* @param resource 
* @param objects 
*/ 
public SelectSongArrayAdapter(Context context, int resource, ArrayList<Song> objects, ArrayList<String> favoriteSongVideoIds) { 
    super(context, resource, objects); 
    this.songs = objects; 
    this.mFavoriteSongs = favoriteSongVideoIds; 

} 

/** 
* Primary functionality to create a list in the view of songs and song detail lines. 
* 
* @param position 
* @param convertView 
* @param parent 
* @return 
*/ 
public View getView(int position, View convertView, ViewGroup parent) { 
    // assign the view we are converting to a local variable 
    View view = convertView; 

    /* 
     Check to see if view null. If so, we have to inflate the view 
     "inflate" basically mean to render or show the view 
    */ 
    if (view == null) { 
     LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     view = inflater.inflate(R.layout.detail_line_song, null); 
    } 

    song = songs.get(position); 

    // obtain a reference to the widgets in the defined layout "wire up the widgets from detail_line" 
    TextView songTitle = (TextView) view.findViewById(R.id.songTitle); 
    TextView songDescription = (TextView) view.findViewById(R.id.songDescription); 
    View viewSongLayout = view.findViewById(R.id.songLayout); //For when user clicks left side of view 

    final ImageButton favoriteStarButton = (ImageButton) view.findViewById(R.id.favorite); 

    //Find out if song is favorite or not: 
    isFavorite = false; 
    for (String songId : mFavoriteSongs) { 

     if (song.getVideoId().equals(songId)) { 
      //Is not a favorite song. Do nothing 

     } else { 
      //Is a favorite song 
      isFavorite = true; 
      break; 
     } 
    } 

    //TODO Testing with multiple favorite songs. 
    songTitle.setText(song.getDisplayName()); 
    songDescription.setText(song.getDescription()); 
    favoriteStarButton.setPressed(isFavorite); //Changes star color 


    //Add Listeners 
    favoriteStarButton.setOnClickListener(new View.OnClickListener() { //Star button click 
     @Override 
     public void onClick(View v) { 

      isFavorite = !isFavorite; 
      if (isFavorite) { 
       //Add to favoriteVideoIds 
       /************************************************ 
       HELP NEEDED HERE: 
       NEED TO PASS DATA (song.getVideoId()) BACK TO THE FRAGMENT SOMEHOW TO 
       REMOVE SONG FROM FAVORITES LIST OF SONGS STORED IN THE ACTIVITY 
       NOT HERE IN THE ARRAYADAPTER) 
       ********************************************************************/ 
      } else { 
       //remove from favoriteVideoIds 
       /************************************************ 
       HELP NEEDED HERE: 
       NEED TO PASS DATA (song.getVideoId()) BACK TO THE FRAGMENT SOMEHOW TO 
       ADD SONG TO FAVORITES LIST OF SONGS STORED IN THE ACTIVITY 
       NOT HERE IN THE ARRAYADAPTER) 
       ********************************************************************/ 
      } 
      v.setPressed(isFavorite); //Changes star color 
      //redraw view 
      v.invalidate(); 
     } 
    }); 

    //Listener for when song is clicked (left side of listview) 
    viewSongLayout.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 

      /****************************************************************** 
      SAME PROBLEM HERE. NEED TO PASS DATA (POSITION) OF THE SONG THAT WAS CLICKED BACK TO THE FRAGMENT. 
********************************/ 

    return view; 
} 
} 

Answer 1

あなたのクリックイベントのためのインタフェースを作成することができます。

private ClickEvents clickEvents; 

public SelectSongArrayAdapter(Context context, int resource, ArrayList<Song> objects, ArrayList<String> favoriteSongVideoIds, ClickEvents clickEvents) { 
    super(context, resource, objects); 
    this.songs = objects; 
    this.mFavoriteSongs = favoriteSongVideoIds; 
    this.clickEvents = clickEvents; 
}  

コールClickEventsの適切な方法：

interface ClickEvents { 
    void onFavoriteStarButtonClick(boolean isFavorite, int position); 
    void onViewSongLayoutClick(int position); 
} 

があなたのArrayAdapterコンストラクタ内の引数としてClickEventsのインスタンスを指定します。 onClickメソッド内：

favoriteStarButton.setOnClickListener(new View.OnClickListener() { //Star button click 
    @Override 
    public void onClick(View v) { 
     isFavorite = !isFavorite; 
     clickEvents.onFavoriteStarButtonClick(isFavorite, position); 
    } 
}); 

viewSongLayout.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
     clickEvents.onViewSongLayoutClick(position); 
    } 
} 

は、最後にパラメータとしてアダプタにClickEventsの実装を渡す：

final ClickEvents clickEvents = new ClickEvents() { 
     @Override 
     public void onFavoriteStarButtonClick(boolean isFavorite, int position) { 
      // FavoriteStarButton clicked 
     } 

     @Override 
     public void onViewSongLayoutClick(int position) { 
      // ViewSongLayout clicked 
     } 
    }; 

final SelectSongArrayAdapter selectSongArrayAdapter = new SelectSongArrayAdapter(getContext(), resource, objects, favoriteSongVideoIds, clickEvents);