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POWhy is the app crashing?
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copied!<p>I am a new programmer to android. I have checked my code over and over again but just cant make out to get it running!!</p> <pre><code>public class Playlist extends Activity { Cursor cursor; @Override protected void onCreate(Bundle savedInstanceState) { ListView myListView = (ListView)findViewById(R.string.playlistHolder); final ArrayList<String> songslist= new ArrayList<String>(); final ArrayAdapter<String> aa= new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,songslist); myListView.setAdapter(aa); /*requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);*/; setContentView(R.layout.activity_playlist); // Show the Up button in the action bar. setupActionBar(); String[] STAR = { "*" }; Uri allsongsuri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; String selection = MediaStore.Audio.Media.IS_MUSIC + " != 0"; cursor = managedQuery(allsongsuri, STAR, selection, null, null); if (cursor != null) { if (cursor.moveToFirst()) { do { //SongName String song_name = cursor .getString(cursor .getColumnIndex(MediaStore.Audio.Media.DISPLAY_NAME)); //SongID int song_id = cursor.getInt(cursor .getColumnIndex(MediaStore.Audio.Media._ID)); //SongPath String fullpath = cursor.getString(cursor .getColumnIndex(MediaStore.Audio.Media.DATA)); //Song's album name String album_name = cursor.getString(cursor .getColumnIndex(MediaStore.Audio.Media.ALBUM)); //Song's album ID int album_id = cursor.getInt(cursor .getColumnIndex(MediaStore.Audio.Media.ALBUM_ID)); //Song's artist name String artist_name = cursor.getString(cursor .getColumnIndex(MediaStore.Audio.Media.ARTIST)); //Song's artist ID int artist_id = cursor.getInt(cursor .getColumnIndex(MediaStore.Audio.Media.ARTIST_ID)); songslist.add(song_id,song_name);//Adding Song to Arraylist aa.notifyDataSetChanged();//Notifying Listview about addition of song. } while (cursor.moveToNext()); } cursor.close(); } super.onCreate(savedInstanceState); } /** * Set up the {@link android.app.ActionBar}, if the API is available. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void setupActionBar() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { getActionBar().setDisplayHomeAsUpEnabled(true); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.playlist, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: // This ID represents the Home or Up button. In the case of this // activity, the Up button is shown. Use NavUtils to allow users // to navigate up one level in the application structure. For // more details, see the Navigation pattern on Android Design: // // http://developer.android.com/design/patterns/navigation.html#up-vs-back // NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } </code></pre> <p>The application crashes as soon as I click on the Playlist button! I have initiated a new Intent from my home activity ->Playlist It is as follows</p> <pre><code>playlist.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub Intent plist = new Intent(arg0.getContext(), Playlist.class); startActivityForResult(plist, 0); } }); </code></pre>

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