我正在製作一個音樂播放器應用程序,我正在使用加載程序將歌曲數據加載到將使用RecyclerView顯示的適配器。但是,我收到我的適配器方法無法正常工作的奇怪錯誤。只有適配器的構造函數方法纔會被調用。 儘管在堆棧溢出中經歷了所有可用的解決方案,但我還得到了「沒有附加適配器;跳過佈局」。要注意的RecyclerView沒有附加適配器;跳過佈局,數據不顯示
幾點:
- 我已經嘗試了所有的解決方案,爲「無任何附加適配器;跳過佈局」中 recyclerview No adapter attached; skipping layout線程和所有相關的重複線程。
- 我使用的RecyclerView不是正規的一個,但FastScrollRecyclerView,但由於它與常規RecyclerView延伸,並有在GitHub中沒有提到聽上去很像問題,所以我相信,使用這個庫是不是一個問題在這裏
- 我也嘗試過所有適配器方法的解決方案,而不是從this線程調用,但沒有運氣。
下面的代碼:
SongsFragment.java
public class SongsFragment extends Fragment
implements LoaderManager.LoaderCallbacks<List<Song>>{
public static final String LOG_TAG = SongsFragment.class.getSimpleName();
private static final int LOADER_ID = 1;
private ContentResolver mContentResolver;
private SongListAdapter mSongListAdapter;
private List<Song> mSongs;
@BindView(R.id.rvSongs) FastScrollRecyclerView mRecyclerView;
public SongsFragment() {}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ButterKnife.bind(getActivity());
mSongs = new ArrayList<>();
mRecyclerView = new FastScrollRecyclerView(getContext());
LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setHasFixedSize(true);
mSongListAdapter = new SongListAdapter(getContext(), mSongs);
mRecyclerView.setAdapter(mSongListAdapter);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
getLoaderManager().initLoader(LOADER_ID, null, this).forceLoad();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_songs, container, false);
}
@Override
public Loader<List<Song>> onCreateLoader(int id, Bundle args) {
mContentResolver = getActivity().getContentResolver();
return new SongsLoader(getContext(), mContentResolver);
}
@Override
public void onLoadFinished(Loader<List<Song>> loader, List<Song> data) {
mSongs = data;
mSongListAdapter.setData(mSongs);
}
@Override
public void onLoaderReset(Loader<List<Song>> loader) {
mSongListAdapter.setData(new ArrayList<Song>());
}
}
SongsListAdapter.java
public class SongListAdapter
extends FastScrollRecyclerView.Adapter<SongListAdapter.SongItemViewHolder>
implements FastScrollRecyclerView.SectionedAdapter{
public static final String LOG_TAG = SongListAdapter.class.getSimpleName();
private Context mContext;
private List<Song> mSongList = new ArrayList<>();
public SongListAdapter(Context context, List<Song> songList) {
Log.d(LOG_TAG, "Constructor called");
mContext = context;
mSongList = songList;
}
@NonNull
@Override
public String getSectionName(int position) {
return String.valueOf(mSongList.get(position).getTitle().charAt(0)).toUpperCase();
}
@Override
public SongItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Log.d(LOG_TAG, "onCreateViewHolder called");
View view = LayoutInflater.from(mContext).inflate(R.layout.list_item_song, null);
return new SongItemViewHolder(view);
}
@Override
public void onBindViewHolder(SongItemViewHolder holder, int position) {
Log.d(LOG_TAG, "onBindViewHolder called");
Uri albumArtUri = mSongList.get(position).getAlbumArtUri();
Glide.with(mContext)
.load(albumArtUri)
.into(holder.albumArt);
holder.titleText.setText(mSongList.get(position).getTitle());
holder.artistText.setText(mSongList.get(position).getArtistName());
Log.d("Data", albumArtUri.toString() + "\n" + mSongList.get(position).getTitle() + "\n" + mSongList.get(position).getArtistName());
}
@Override
public int getItemCount() {
Log.d(LOG_TAG, "getItemCount called");
return (mSongList != null ? mSongList.size() : 0);
}
public void setData(List<Song> songs){
mSongList = songs;
notifyDataSetChanged();
}
public class SongItemViewHolder extends FastScrollRecyclerView.ViewHolder {
ImageView albumArt;
TextView titleText;
TextView artistText;
SongItemViewHolder(View view) {
super(view);
Log.d(LOG_TAG, "SongItemViewHolder called");
albumArt = (ImageView) view.findViewById(R.id.item_song_image);
titleText = (TextView) view.findViewById(R.id.item_song_title);
artistText = (TextView) view.findViewById(R.id.item_song_artist_name);
}
}
}
fragment_songs.xml(SongsFragment被誇大這種佈局)
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.simplecityapps.recyclerview_fastscroll.views.FastScrollRecyclerView
android:id="@+id/rvSongs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:fastScrollPopupBgColor="@color/colorAccent"
app:fastScrollPopupTextColor="@android:color/primary_text_dark"
app:fastScrollThumbColor="@color/colorAccent"/>
</ScrollView>
list_item_song.xml(以回收查看單個項目)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:layout_gravity="center_horizontal"
android:layout_marginStart="12dp"
android:layout_marginLeft="12dp"
android:layout_marginRight="12dp"
android:background="#FFFFFF"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingBottom="10dp"
android:paddingLeft="8dp"
android:paddingRight="8dp"
android:paddingStart="8dp"
android:paddingTop="10dp">
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/item_song_image"
android:layout_width="64dp"
android:src="@drawable/music_placeholder"
android:layout_height="64dp"/>
</FrameLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:orientation="vertical">
<TextView
android:id="@+id/item_song_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="Song_Title"/>
<TextView
android:id="@+id/item_song_artist_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="3dp"
android:textSize="12sp"
android:text="Song_Artist"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
這已經很無奈。請查看代碼並幫助我。我認爲我做的一切都正確,但我可能是錯的。我知道scrollview和recyclerview沒有那麼好,但我看過預覽和回收站視圖。任何幫助將不勝感激。謝謝!在onLoadFinished()
日誌列表的大小被提供給你的'SongListAdapter .setData()'。 –
使用日誌語句來知道傳遞給'SongListAdapter.setData()'的列表大小。大小爲609.爲我的設備傳遞了609首歌曲。 – Pulak
你會得到Log.d(LOG_TAG,「getItemCount called」);'? –