parcelable encountered ioexception writing serializable object.........?

Question

The code

SngList.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView a, View v, int position, long id) {


        Intent intent = new Intent(getActivity(), NowPlaying.class);
        intent.putExtra("Data1",Songinfo);
        intent.putExtra("Data2",position);
        startActivity(intent);

    }
});

code in the receiving class

Intent i = getIntent();
ArrayList<SongDetails> Songinfo2 = (ArrayList<SongDetails>)i.getSerializableExtra("Data1"); 
position=i.getIntExtra("Data2", 1);

code for songDetials

package sourcecode.jazzplayer;

import java.io.Serializable;

import android.graphics.Bitmap;

public class SongDetails implements Serializable{
    Bitmap icon ;
    String song;
    String Artist; 
    String Album;
    String Path;
   int icLauncher;

    public String getSong() {
        return song;
    }

    public void setSong(String song) {
        this.song = song;
    }

    public String getArtist() {
        return Artist;
    }

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

    public Bitmap getIcon() {
        return icon;
    }

    public void setIcon(Bitmap bitmap) {
        this.icon = bitmap;
    }

    public String getPath2() {
        return Path;
    }

    public void setPath2(String Path) {
        this.Path = Path;
    }

    public String getAlbum() {
        return Album;
    }

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

    public void setIcon(int icLauncher) {
        this.icLauncher = icLauncher;
    }
}

the whole code:

public class FragmentSongs extends  Fragment implements Serializable {
    AdapterView.AdapterContextMenuInfo info;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) 
    {

        View view = inflater.inflate(R.layout.fragment_song, container, false);
        ListView SngList = (ListView) view.findViewById(R.id.SongList);
        registerForContextMenu(SngList);
        File f=new File("/system/");
        //File f=new File("/sdcard/Music");
        int j=0;int i=0;



         final ArrayList<SongDetails> Songinfo = getSongsFromDirectory(f);

        if (Songinfo.size()>0)
        {

            for( j=0; j<Songinfo.size();j++)
            {
                for ( i=j+1 ; i<Songinfo.size(); i++)
                { 
                    SongDetails a=Songinfo.get(i);
                    SongDetails b=Songinfo.get(j);
                    if(a.getSong().toLowerCase().compareTo(b.getSong().toLowerCase())<0)
                    {   

                        Songinfo.set(i,b );
                        Songinfo.set(j,a);
                    }
                }

            }

            SngList.setOnItemClickListener(new OnItemClickListener() {
                 public void onItemClick(AdapterView a, View v, int position, long id) {


                       Intent intent = new Intent(getActivity(), NowPlaying.class);
                       intent.putExtra("Data1",Songinfo);
                       intent.putExtra("Data2",position);
                       startActivity(intent);

                             }
                     });

           SngList.setAdapter(new CustomAdapter(Songinfo));
           return view;
        }
        else return null;

    }



        public ArrayList<SongDetails> getSongsFromDirectory(File f)
        {MediaMetadataRetriever mmr = new MediaMetadataRetriever();
            ArrayList<SongDetails> songs = new ArrayList<SongDetails>();
            Bitmap bitmap2; 
            Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.ab);

            float ht_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
            float wt_px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());

            bitmap2 = Bitmap.createScaledBitmap(bmp, (int) ht_px, (int) wt_px, true);



           byte[] rawArt = null;
            Bitmap art;
            BitmapFactory.Options bfo=new BitmapFactory.Options();
            if (!f.exists() || !f.isDirectory()) 

            {    
                return songs;
            }
            File[] files = f.listFiles(new Mp3Filter());
            for(int i=0; i<files.length; i++) 
            { 

                if (files[i].isFile())
                { 


                 //mmr.setDataSource(files[i].getPath());
                // rawArt = mmr.getEmbeddedPicture();
                    SongDetails detail=new SongDetails(); 
                //if ( rawArt != null) 

                //{ 
                    //bitmap2=BitmapFactory.decodeByteArray(rawArt, 0, rawArt.length, bfo);
                    //bitmap2 = Bitmap.createScaledBitmap(bitmap2, (int) ht_px, (int) wt_px, true);

                    //detail.setIcon(bitmap2);
                //}//else 
            //{     
                    detail.setIcon(bitmap2);
                //} 

                    detail.setSong(files[i].getName()); 
          // detail.setArtist(files[i].getName());
          // detail.setAlbum(files[i].getName());

             //detail.setArtist(mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST)); 

          // detail.setAlbum(mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM)); 
           detail.setPath2( files[i].getPath()) ;
           songs.add(detail); 
                }
                else if (files[i].isDirectory())
                { 
                songs.addAll(getSongsFromDirectory(files[i])); 
                } 

            }       return songs;
    }
        @Override
        public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) 
        {
                        super.onCreateContextMenu(menu, v, menuInfo);      
                       info = (AdapterContextMenuInfo) menuInfo;
                       menu.add(Menu.NONE, v.getId(), 0, "Play");
                       menu.add(Menu.NONE, v.getId(), 0, "Delete");
                       menu.add(Menu.NONE, v.getId(), 0, "Queue Item");                  
               }

        @Override
        public boolean onContextItemSelected(MenuItem item) {
                if (item.getTitle() == "Play") {

                       }
                 else if (item.getTitle() == "Delete") {

                       }

                 else if (item.getTitle() == "Queue Item") {

                       }
                 else     {
                       return false;
                       }
               return true;
               }}


        class Mp3Filter implements FileFilter
        {
            public boolean accept(File file)
            {
            return (file.isDirectory()||file.getName().endsWith(".apk")|| file.getName().endsWith(".Mp3"));
            }
        }

The Log

java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = sourcecode.jazzplayer.SongDetails)

Answer 1

Ok i implemented part of it for you. You have to add all the other properties of your SongDetails class:

MainActivity.java:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    SongDetails Songinfo1 = new SongDetails();
    Songinfo1.setSong("song1");

    SongDetails Songinfo2 = new SongDetails();
    Songinfo2.setSong("song2");

    ArrayList<SongDetails> list = new ArrayList<SongDetails>();
    list.add(Songinfo1);
    list.add(Songinfo2);

    Intent intent = new Intent(this, SecondActivity.class);
    intent.putParcelableArrayListExtra("Data1", list);
    intent.putExtra("Data2", 1);
    startActivity(intent);

}

In the activity in which you are retrieving the songs, use this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_asdf);

    ArrayList<SongDetails> songs = getIntent().getParcelableArrayListExtra("Data1");

    for(SongDetails songDetails : songs) {
        Log.i("", songDetails.getSong());
    }
}

Your SongDetails class should look like this:

SongDetails:

public class SongDetails implements Parcelable {
    Bitmap icon;
    String song;
    String Artist;
    String Album;
    String Path;
    int icLauncher;

    public SongDetails() {
    }

    public SongDetails(Parcel in) {
        String[] data = new String[1];
        in.readStringArray(data);
        this.song = data[0];
    }

    public String getSong() {
        return song;
    }

    public void setSong(String song) {
        this.song = song;
    }

    public String getArtist() {
        return Artist;
    }

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

    public Bitmap getIcon() {
        return icon;
    }

    public void setIcon(Bitmap bitmap) {
        this.icon = bitmap;
    }

    public String getPath2() {
        return Path;
    }

    public void setPath2(String Path) {
        this.Path = Path;
    }

    public String getAlbum() {
        return Album;
    }

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

    public void setIcon(int icLauncher) {
        this.icLauncher = icLauncher;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeStringArray(new String[] { this.song });
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public SongDetails createFromParcel(Parcel in) {
            return new SongDetails(in);
        }

        public SongDetails[] newArray(int size) {
            return new SongDetails[size];
        }
    };
}

Answer 2

According to https://forums.bignerdranch.com/t/challenge-saving-state-notserializableexception-error/8018/5 you should implement or extend some class from Parcelable. In my case I had a DialogFragment with an interface MyCallback extending Serializable. In newInstance(MyCallback callback) builder I used:

Bundle args = new Bundle();
args.putSerializable(key, callback);

that led to an exception. Then I rewrote MyCallback to extend Parcelable and also added some methods to a callback when invoked this DialogFragment. At least, it doesn't crash on Home button or screen off.

Also changed to:

Bundle args = new Bundle();
args.putParcelable(key, callback);