java.lang.ClassCastException: com.gauravk.audiovisualizer.visualizer.BlastVisualizer

Doctor32th

When I run my music player I receive this error:  

Doctor32th

//I LEAVE MY CODE HERE public class PlayerActivity extends AppCompatActivity { Button btnPlay, btnNext, btnPrevious, btnFastForward, btnFastBackward; TextView txtSongName, txtSongStart, txtSongEnd; SeekBar seekMusicBar; BarVisualizer barVisualizer; ImageView imageView; String songName; public static final String EXTRA_NAME = "song_name"; static MediaPlayer mediaPlayer; int position; ArrayList<File> mySongs; Thread updateSeekBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_player); btnPrevious = findViewById(R.id.btnPrevious); btnNext = findViewById(R.id.btnNext); btnPlay = findViewById(R.id.btnPlay); btnFastForward = findViewById(R.id.btnFastForward); btnFastBackward = findViewById(R.id.btnFastBackward); txtSongName = findViewById(R.id.txtSong); txtSongStart = findViewById(R.id.txtSongStart); txtSongEnd = findViewById(R.id.txtSongEnd); seekMusicBar = findViewById(R.id.seekBar); barVisualizer = findViewById(R.id.green_wave); imageView = findViewById(R.id.imgView); if (mediaPlayer != null){ mediaPlayer.start(); mediaPlayer.release(); } Intent intent = getIntent(); Bundle bundle = intent.getExtras(); mySongs = (ArrayList)bundle.getParcelableArrayList("songs"); String sName = intent.getStringExtra("songname"); position = bundle.getInt("pos", 0); txtSongName.setSelected(true); Uri uri = Uri.parse(mySongs.get(position).toString()); songName = mySongs.get(position).getName(); txtSongName.setText(songName); mediaPlayer = MediaPlayer.create(getApplicationContext(), uri); mediaPlayer.start(); updateSeekBar = new Thread(){ @Override public void run() { int totalDuration = mediaPlayer.getDuration(); int currentPosition = 0; while(currentPosition < totalDuration) { try { sleep(500); currentPosition = mediaPlayer.getCurrentPosition(); seekMusicBar.setProgress(currentPosition); } catch (InterruptedException | IllegalStateException e) { e.printStackTrace(); } } } }; seekMusicBar.setMax(mediaPlayer.getDuration()); updateSeekBar.start(); seekMusicBar.getProgressDrawable().setColorFilter(getResources().getColor(R.color.teal_200), PorterDuff.Mode.MULTIPLY); seekMusicBar.getThumb().setColorFilter(getResources().getColor(R.color.teal_200), PorterDuff.Mode.SRC_IN); seekMusicBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { mediaPlayer.seekTo(seekBar.getProgress()); } }); String endTime = createTime(mediaPlayer.getDuration()); txtSongEnd.setText(endTime); final Handler handler = new Handler(); final int delay = 1000; handler.postDelayed(new Runnable() { @Override public void run() { String currentTime = createTime(mediaPlayer.getCurrentPosition()); txtSongStart.setText(currentTime); handler.postDelayed(this, delay); } }, delay); btnPlay.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if(mediaPlayer.isPlaying()){ btnPlay.setBackgroundResource(R.drawable.ic_play); mediaPlayer.pause(); } else { btnPlay.setBackgroundResource(R.drawable.ic_pause); mediaPlayer.start(); TranslateAnimation moveAnim = new TranslateAnimation(-25, 25,-25, 25); moveAnim.setInterpolator(new AccelerateInterpolator()); moveAnim.setDuration(600); moveAnim.setFillEnabled(true); moveAnim.setFillAfter(true); moveAnim.setRepeatMode(Animation.REVERSE); moveAnim.setRepeatCount(1); imageView.startAnimation(moveAnim); } } }); mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { btnNext.performClick(); } }); int audioSessionId = mediaPlayer.getAudioSessionId(); if (audioSessionId != -1) { barVisualizer.setAudioSessionId(audioSessionId); } btnNext.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mediaPlayer.stop(); mediaPlayer.release(); position = ((position + 1)%mySongs.size()); Uri uri = Uri.parse(mySongs.get(position).toString()); mediaPlayer = MediaPlayer.create(getApplicationContext(), uri); songName = mySongs.get(position).getName(); txtSongName.setText(songName); mediaPlayer.start(); startAnimation(imageView, 360f); } }); btnPrevious.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { mediaPlayer.stop(); mediaPlayer.release(); position = ((position - 1) < 0)?(mySongs.size() -1):position-1; Uri uri = Uri.parse(mySongs.get(position).toString()); mediaPlayer = MediaPlayer.create(getApplicationContext(), uri); songName = mySongs.get(position).getName(); txtSongName.setText(songName); mediaPlayer.start(); startAnimation(imageView, -360f); } }); btnFastForward.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (mediaPlayer.isPlaying()){ mediaPlayer.seekTo(mediaPlayer.getCurrentPosition() + 10000); } } }); btnFastBackward.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (mediaPlayer.isPlaying()){ mediaPlayer.seekTo(mediaPlayer.getCurrentPosition() - 10000); } } }); } public void startAnimation(View view, Float degree){ ObjectAnimator objectAnimator = ObjectAnimator.ofFloat(imageView, "rotation", 0f, degree); objectAnimator.setDuration(1000); AnimatorSet animatorSet = new AnimatorSet(); animatorSet.playTogether(objectAnimator); animatorSet.start(); } public String createTime(int duration){ String time = ""; int min = duration/1000/60; int sec = duration/1000%60; time = time + min + ":"; if (sec < 10) { time+="0"; } time+=sec; return time; } }

AwesomeDracula

In your .xml file, using <com.gauravk.audiovisualizer.visualizer.BarVisualizer /> instead of <com.gauravk.audiovisualizer.visualizer.BlastVisualizer />

Doctor32th

Thank you! It works!!