MusicAdapter Class

public class MusicAdapter extends RecyclerView.Adapter<MusicAdapter.MusicVH> { List<Musiv> musicList; private Context context; public MusicAdapter(List<Musiv> musicList) { this.musicList = musicList; } public MusicAdapter(Context context) { this.context = context; } public MusicAdapter( ) { } @NonNull @Override public MusicVH onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) { LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext()); View view = inflater.inflate(R.layout.nice_artist, viewGroup, false); return new MusicVH(view); } @Override public void onBindViewHolder(@NonNull final MusicVH musicVH, final int i) { Musiv music = musicList.get(i); musicVH.albumImage.setImageResource(music.getAlbunImgeId()); musicVH.artist.setText(music.getArtist()); musicVH.description.setText(music.getMusic()); musicVH.artistCard.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { musicList.remove(i); notifyItemRemoved(i); notifyItemChanged(i); return false; } }); musicVH.artistCard.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(musicVH.itemView.getContext(), Description.class); intent.putExtra("Name",musicVH.artist.getText()); intent.putExtra("Description",musicVH.description.getText()); // Bundle bundle = new Bundle(); // int id = musicVH.albumImage.getId(); // bundle.putInt("image", id); // intent.putExtras(bundle); //intent.putExtra("Image", musicVH.albumImage.getId()); context.startActivity(intent); } }); } @Override public int getItemCount() { return musicList.size(); } class MusicVH extends RecyclerView.ViewHolder{ private ImageView albumImage; private TextView artist; private TextView description; private CardView artistCard; public MusicVH(@NonNull View itemView) { super(itemView); albumImage = itemView.findViewById(R.id.albumImage); artist = itemView.findViewById(R.id.artistName); description = itemView.findViewById(R.id.artistDescription); artistCard = itemView.findViewById(R.id.musicCard); } } }

Manifest

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.paulr.adapterlessonsumsungtest"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <!--Ошибка ниже--> <activity android:name=".MusicAdapter" /> <activity android:name=".Description"></activity> </application> </manifest>

    1 answer 1

    Your MusicAdapter class is not an activity; it extends the RecyclerView.Adapter, not the Activity. No need to add it to the manifest. Delete line

     <activity android:name=".MusicAdapter" />