CODEWITHSUNDEEP
android
Phillips
Phillips

Reputation: 61

Media player create method does not seem to work on my project, causes my app to crash on launching the first activity. somebody help me plz

Util class holding Media player create method:

{

private static ArrayList<Song> allSongs;
private static ArrayList<Song> favouriteSongs;
private static int id = 0;
Context context;

public Util(Context context) {
    this.context = context;
}

public Util() {
    if (allSongs == null){
        allSongs = new ArrayList<>();
        initializingAllSongs();
    }

    if (favouriteSongs == null){
        favouriteSongs = new ArrayList<>();
    }
}



public static ArrayList<Song> getAllSongs() {
    return allSongs;
}

public static ArrayList<Song> getFavouriteSongs() {
    return favouriteSongs;
}
public void addToFavSongs(Song song){
    favouriteSongs.add(song);
}
public void removeFromFavSongs(Song song){
    favouriteSongs.remove(song);
}

private void  initializingAllSongs(){

    int songNumber = 0;
    String songTitle = "";
    String songLyrics = " ";
    MediaPlayer audioPlayer ;

    id++;
    songNumber = 1;
    songTitle = "Sample song Title ";
    songLyrics = "Sample lyrics Sample lyrics \n" +
            " Sample lyrics Sample lyrics \n" +
            "Sample lyrics Sample lyrics \n" +
            " Sample lyrics Sample lyrics";
    audioPlayer = new MediaPlayer();
    audioPlayer = MediaPlayer.create(context.getApplicationContext(), R.raw.audio);
    allSongs.add(new Song(id, songNumber, songTitle, songLyrics, audioPlayer ));




    id++;
    songNumber = 2;
    songTitle = "Sample song Title ";
    songLyrics  = "Sample lyrics Sample lyrics \n" +
            " Sample lyrics Sample lyrics \n" +
            "Sample lyrics Sample lyrics \n" +
            " Sample lyrics Sample lyrics";
    audioPlayer = new MediaPlayer();
    audioPlayer = MediaPlayer.create(context.getApplicationContext(), R.raw.audi);
    allSongs.add(new Song(id, songNumber, songTitle, songLyrics, audioPlayer ));


}

}

MainActivity (part of it):

     recyclerView = findViewById(R.id.songsRecView);

     SongRecViewAdapter adapter = new SongRecViewAdapter(this);
     recyclerView.setAdapter(adapter);
     recyclerView.setLayoutManager(new LinearLayoutManager(this));

     Util util = new Util();
     ArrayList<Song> allSongs = new ArrayList<>();
     allSongs = util.getAllSongs();
     adapter.setSongs(allSongs);

Logcat: Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference at com.example.mrfpc.Util.initializingAllSongs(Util.java:62) at com.example.mrfpc.Util.(Util.java:22) at com.example.mrfpc.MainActivity.onCreate(MainActivity.java:36)

Upvotes: 0

Views: 120

Answers (1)

Mergim Rama
Mergim Rama

Reputation: 388

This is happening because you haven't initialized Context in the constructor your initializing in your activity.

Add Context in second constructor and remove the one that has it, initialize it there and it won't throw it anymore.

Upvotes: 1

Related Questions