如何设置数组的方法

Question

我试图显示像艺术家，专辑，标题等多媒体商店的专栏。我能够得到arraylist列中的一个正确，它正在工作，但是当我添加另一列我得到的所有列在同一个数组列表中，所以我创建了一个类，并在该类方法中添加了列。但我无法在custome适配器中声明它 这是我的代码。

活动主

private ArrayList <MediaFileInfo> audioList = new ArrayList < >(); 

    private void External() { 
     try { 
      String[] proj = { 
       MediaStore.Audio.Media._ID, 
        MediaStore.Audio.Media.TITLE, 
        MediaStore.Audio.Media.ARTIST, 
        MediaStore.Audio.Media.ALBUM 
      }; // Can include more data for more details and check it. 

      String selection = MediaStore.Audio.Media.DURATION + ">=90000"; 

      String[] selectionArgs = null; 

      String sortOrder = MediaStore.Audio.Media.TITLE + " ASC"; 

      Cursor audioCursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, proj, selection, selectionArgs, sortOrder); 

      if (audioCursor != null) { 
       if (audioCursor.moveToFirst()) { 
        do { 
         int audioTitle = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); 
         int audioartist = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ARTIST); 
         int audioalbum = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.ALBUM); 
         MediaFileInfo info = new MediaFileInfo(); 
         info.setTitle(audioCursor.getString(audioTitle)); 
         info.setAlbum(audioCursor.getString(audioalbum)); 
         info.setArtist(audioCursor.getString(audioartist)); 
         audioList.add(info); 
        } while (audioCursor.moveToNext()); 
       } 
      } 
      audioCursor.close(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
} 

Method类

public class MediaFileInfo { 
    private String title, artist, album; 

    public String getTitle() { 
     return title; 
    } 

    public void setTitle(String title) { 
     this.title = title; 
    } 

    public String getArtist() { 
     return artist; 
    } 

    public void setArtist(String artist) { 
     this.artist = artist; 
    } 

    public String getAlbum() { 
     return album; 
    } 

    public void setAlbum(String album) { 
     this.album = album; 
    } 
} 

CustomeAdapter

public class CustomeAdapter extends ArrayAdapter { 
    private ArrayList <MediaFileInfo> audioList = new ArrayList < >(); 

    public CustomeAdapter(Context context, int resource) { 
     super(context, resource); 
    } 

    public CustomeAdapter(MainActivity context, ArrayList <MediaFileInfo> audioList) { 
     super(context, R.layout.custome_list, audioList); 
    } 

    @ 
    Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     LayoutInflater imthebest = LayoutInflater.from(getContext());@ 
     SuppressLint("ViewHolder") View custome = imthebest.inflate(R.layout.custome_list, parent, false); 
     MediaFileInfo item = audioList.get(0); 
     String item1 = (String) getItem(position); 
     TextView text1 = (TextView) custome.findViewById(R.id.textView); 
     text1.setText(item1); 


     return custome; 
    } 
} 

custome XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:orientation="vertical" android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<TextView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceMedium" 
    android:text="Song name" 
    android:id="@+id/textView" /> 

<TextView 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textAppearance="?android:attr/textAppearanceSmall" 
    android:text="Artist" 
    android:id="@+id/textView2" /> 
</LinearLayout> 

如何设置方法为数组。如何，我可以得到任何方法例如将有助于

Answer 1

如何获得两个冠军和艺术家到你的列表：

@Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

     if (convertView == null) { 
      convertView = LayoutInflater.from(getContext()).inflate(R.layout.custome_list, parent, false); 
     } 
     MediaFileInfo item = (MediaFileInfo) getItem(position); 
     TextView text1 = (TextView) convertView.findViewById(R.id.textView); 
     text1.setText(item.getTitle()); 
     TextView text2 = (TextView) convertView.findViewById(R.id.textView2); 
     text2.setText(item.getArtist()); 


     return convertView; 
    } 

---

如果你是从数据库获取数据并拥有Cursor，那么您应该创建一个CursorAdapter子类。您不需要从数据中创建自己的列表。

所有你需要做的是覆盖bindView()。 bindView()将为您提供一个View以填写列表项以及Cursor，该列表已位于具有该项目数据的记录中。从光标获取列数据并在列表项视图中设置子视图是一个简单的操作。