如何将方法设置为数组

我正在尝试显示多个媒体商店列，如艺术家，专辑，标题等。我能够正确地获得arraylist中的一个列并且它正在工作但是当我添加另一个列时我得到的所有列都在同一列中数组列表，所以我创建了一个类，并在该类方法中添加列。但我无法在客户端适配器中声明它是我的代码。

活动主体

private ArrayList  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(); } } } 

方法类

  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  audioList = new ArrayList  (); public CustomeAdapter(Context context, int resource) { super(context, resource); } public CustomeAdapter(MainActivity context, ArrayList  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

如何将方法设置为数组。如何我可以获得任何示例的方法将有所帮助

Answer 1

如何将标题和艺术家都列入您的列表：

  @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; } 

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如果要从数据库获取数据并拥有Cursor那么您应该创建一个CursorAdapter子类。 您无需从数据中创建自己的列表。

您需要做的就是覆盖bindView() 。 bindView()将为您提供一个View以填充列表项和一个已定位在包含此项目数据的记录的Cursor 。 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。