the tab screen appears blank activity

Question

public class SongsTab extends Fragment {
    private ArrayList<songInfo> _songs = new ArrayList<songInfo>();
    RecyclerView recyclerView;
    SeekBar seekBar;
    songAdapter songAdapter1;
    MediaPlayer mediaPlayer;
    private Handler myHandler = new Handler();

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.fragment_main, container, false);
        recyclerView = (RecyclerView)v. findViewById(R.id.recyclerView);
        CardView cardView = (CardView) v.findViewById(R.id.card);
        seekBar = (SeekBar) v.findViewById(R.id.seekBar);
        songAdapter1 = new songAdapter(getActivity(),_songs);
        recyclerView.setAdapter(songAdapter1);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
        DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(),
                linearLayoutManager.getOrientation());
        recyclerView.setLayoutManager(linearLayoutManager);
        recyclerView.addItemDecoration(dividerItemDecoration);
        songAdapter1.setOnItemClickListener(new songAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(RecyclerView.ViewHolder holder, View view, final songInfo obj, int position) {
                if(mediaPlayer.isPlaying()){
                    mediaPlayer.stop();
                    mediaPlayer.reset();
                    mediaPlayer.release();
                    mediaPlayer = null;

                }else {

                    Runnable runnable = new Runnable() {
                        @Override
                        public void run() {
                            try {
                                mediaPlayer = new MediaPlayer();
                                mediaPlayer.setDataSource(obj.getSongUrl());
                                mediaPlayer.prepareAsync();
                                mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
                                    @Override
                                    public void onPrepared(MediaPlayer mp) {
                                        mp.start();
                                        seekBar.setProgress(0);
                                        seekBar.setMax(mediaPlayer.getDuration());
                                        Log.d("Prog", "run: " + mediaPlayer.getDuration());
                                    }
                                });
                                Log.i("devesh","vikas");



                            }catch (Exception e){}
                        }

                    };
                    myHandler.postDelayed(runnable,100);

                }
            }
        });
        checkUserPermission();

        Thread t = new runThread();
        t.start();
        return v;
    }

    public class runThread extends Thread {


        @Override
        public void run() {
            while (true) {

                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                Log.d("Runwa", "run: " + 1);
                if (mediaPlayer != null) {
                    seekBar.post(new Runnable() {
                        @Override
                        public void run() {
                            seekBar.setProgress(mediaPlayer.getCurrentPosition());
                        }
                    });

                    Log.d("Runwa", "run: " + mediaPlayer.getCurrentPosition());
                }
            }
        }

    }

    private void checkUserPermission(){
        if(Build.VERSION.SDK_INT>=23){
            if(ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE)
                    != PackageManager.PERMISSION_GRANTED){
                requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},123);
                return;
            }
        }
        loadSongs();
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode){
            case 123:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    loadSongs();
                }else{
                    Toast.makeText(getContext(), "Permission Denied", Toast.LENGTH_SHORT).show();
                    checkUserPermission();
                }
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        }

    }

    private void loadSongs(){
        Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        String selection = MediaStore.Audio.Media.IS_MUSIC+"!=0";
        Cursor cursor = getContext().getContentResolver().query(uri,null,selection,null,null);
        if(cursor != null){
            if(cursor.moveToFirst()){
                do{
                    String name = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ALBUM));
                    String artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
                    String url = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.DATA));

                    songInfo s = new songInfo(name,artist,url);
                    _songs.add(s);
                    songAdapter1.notifyDataSetChanged();
                }while (cursor.moveToNext());
            }

            cursor.close();
            songAdapter1 = new songAdapter(getActivity(),_songs);

        }
    }
}

I m trying to get list of song in tab activity but when app runs it appears blank and says:

no adapter attached, skipping layout

But when I run the same code in other project without tab activity it works fine. Please help. Let me know if you want other details.

This is my logact:

No adapter attached; skipping layout 01-04 02:56:42.346 24747-24775/com.example.murarilal.musicmania E/EGL_emulation: tid 24775: eglSurfaceAttrib(1223): error 0x3009 (EGL_BAD_MATCH) 01-04 02:56:42.346 24747-24775/com.example.murarilal.musicmania W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0x9e211d00, error=EGL_BAD_MATCH 01-04 02:56:42.352 24747-24747/com.example.murarilal.musicmania I/Choreographer: Skipped 33 frames! The application may be doing too much work on its main thread. 01

add `recyclerView.setAdapter(songAdapter1 )` in `loadSongs()` method last line. — Mohammed Farhan, Jan 04 '18 at 12:27

Tomin B Azhakathu · Answer 1 · 2018-01-04T12:23:04.573

0

I think You had inflated the Wrong XML. Try inflating fragment_songs_tab instead of fragment_main if there is fragment_songs_tab.xml

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.fragment_songs_tab, container, false);
    return v;
 }

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    // add your code here which executes after the execution of onCreateView() method.

}

Refer Difference Between ViewCreated and CreateView

Difference between onCreateView and onViewCreated in Fragment

edited Jan 04 '18 at 12:23

answered Jan 04 '18 at 11:37

Tomin B Azhakathu

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i edited this,thanks.but even now i m not getting list – devesh kumawat Jan 04 '18 at 11:43
Try removing `songAdapter1 = new songAdapter(getActivity(),_songs);` from load songs function . And Try Calling Loadsongs in Main Thread. – Tomin B Azhakathu Jan 04 '18 at 11:56
R u sure the Frsgment is Loaded and load song function is Called – Tomin B Azhakathu Jan 04 '18 at 12:12
And do inflation and Return view in Create view and Do all Other Actions in onViewCreated() method. – Tomin B Azhakathu Jan 04 '18 at 12:13
i have a seekbar it appears perfect. – devesh kumawat Jan 04 '18 at 12:19
Add a Log inside LoadSong Function or add a breakpoint and Check – Tomin B Azhakathu Jan 04 '18 at 12:20
log doesnt display – devesh kumawat Jan 04 '18 at 12:32
It is Good to Function is To Be Called immediatly after The Adapter is set – Tomin B Azhakathu Jan 04 '18 at 12:40
i m not getting list – devesh kumawat Jan 04 '18 at 12:51
Please Make Sure that You have Got hte Result .Either By Debugging or By Loggging – Tomin B Azhakathu Jan 05 '18 at 04:04

the tab screen appears blank activity

1 Answers1