我试图在我的应用程序中使用Cleveroad WaveInApp
https://github.com/Cleveroad/WaveInApp一切正常，但是当Song完成时，它也会停止mediaPlayer.setOnCompletionListener（当我删除此代码时，它可以正常工作）。
当我尝试更改歌曲时，它会崩溃。 错误： -
java.lang.NullPointerException：尝试调用接口方法＆＃39; void com.cleveroad.audiovisualization.InnerAudioVisualization.stopRendering（）＆＃39;在null对象引用上 在com.cleveroad.audiovisualization.DbmHandler.stopRendering（DbmHandler.java:61） 在com.cleveroad.audiovisualization.DbmHandler $ 2.onCalmedDown（DbmHandler.java:82） 在com.cleveroad.audiovisualization.GLAudioVisualizationView $ 1.onCalmedDown（GLAudioVisualizationView.java:49） 在com.cleveroad.audiovisualization.GLRenderer.onDrawFrame（GLRenderer.java:87） 在android.opengl.GLSurfaceView $ GLThread.guardedRun（GLSurfaceView.java:1608） 在android.opengl.GLSurfaceView $ GLThread.run（GLSurfaceView.java:1299）
MainContainer.class
public class MainContainer extends AppCompatActivity
implements
NavigationView.OnNavigationItemSelectedListener,
SeekBar.OnSeekBarChangeListener {
private static final String LOGTAG = "Friday";
public static final String isPlay = "isPlay";
public static final String NOTIFICATION_ACTION = "Notification_Action";
private static final String VOLUME_BUTTON = "android.media.VOLUME_CHANGED_ACTION";
SlidingUpPanelLayout slideLayout;
MusicService mService;
boolean mBound = false;
Timer t = new Timer();
SeekBar seekBar;
ImageView albumArt;
ImageView panelAlbumart;
TextView songname;
TextView singername;
TextView seekCurrentDuration;
TextView seekTotalDuration;
TextView panelSongname;
TextView panelSingername;
ImageView playBtn;
IntentFilter mIntentFilter;
RelativeLayout panelHead;
SeekBar volumeControl;
AudioManager audioManager;
AudioVisualization audioVisualization;
VisualizerDbmHandler vizualizerHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_container);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
setVolumeControlStream(AudioManager.STREAM_MUSIC); //best practice to set volume control
DrawerLayout drawer = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
ViewPager vp_pages = findViewById(R.id.vp_pages);
PagerAdapter pagerAdapter = new FragmentAdapter(getSupportFragmentManager());
vp_pages.setAdapter(pagerAdapter);
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(isPlay);
mIntentFilter.addAction(VOLUME_BUTTON);
mIntentFilter.addAction(NOTIFICATION_ACTION);
TabLayout tbl_pages = findViewById(R.id.tbl_pages);
tbl_pages.setupWithViewPager(vp_pages);
seekBar = findViewById(R.id.seek_bar_red);
seekBar.setOnSeekBarChangeListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_container, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onStart() {
super.onStart();
// Bind to LocalService
Intent intent = new Intent(this, MusicService.class);
bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}
@Override
protected void onStop() {
super.onStop();
unbindService(mConnection);
mBound = false;
}
// control Volume by Seekbar
private void volumeControl() {
volumeControl = findViewById(devil.jarvis.friday.R.id.volume_control);
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
if (audioManager != null) {
volumeControl.setMax(audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC));
volumeControl.setProgress(audioManager.getStreamVolume(AudioManager.STREAM_MUSIC));
}
volumeControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, i, 0);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
@Override
public void onResume() {
super.onResume();
registerReceiver(mReceiver, mIntentFilter);
init();
//todo add this when song is played
audioVisualization.onResume();
updateUI();
volumeControl();
}
@Override
public void onPause() {
audioVisualization.onPause();
unregisterReceiver(mReceiver);
super.onPause();
}
@Override
protected void onDestroy() {
super.onDestroy();
}
private void init() {
albumArt = findViewById(R.id.musicArt);
panelAlbumart = findViewById(R.id.slidePanelArt);
songname = findViewById(R.id.song_name);
singername = findViewById(R.id.singer_name);
panelSingername = findViewById(R.id.singer_name_head);
panelSongname = findViewById(R.id.song_name_head);
seekCurrentDuration = findViewById(R.id.current_time);
seekTotalDuration = findViewById(R.id.song_duration);
playBtn = findViewById(R.id.play);
panelHead = findViewById(R.id.header);
slideLayout = findViewById(R.id.sliding_layout);
audioVisualization = findViewById(R.id.visualizer_view);
}
public void updateUI() {
//Update UI
t.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
if (mBound) {
try {
setupMusicUI(mService.getCurrentDuration(), mService.getDuration());
} catch (Exception e) {
//
}
}
}
}, 0, 1000);
}
private void setupMusicUI(int currentDuration, int duration) {
seekBar.setMax(duration);
seekBar.setProgress(currentDuration);
}
// code for update song details
private void updateTextInfo() {
if (mBound) {
int pos = mService.getPosition();
panelSongname.setText(arrayList.get(pos));
panelSingername.setText(artistName.get(pos));
songname.setText(arrayList.get(pos));
singername.setText(artistName.get(pos));
//update album art with text also
updateAlbumArt();
changePlayBtn();
startEqualiser();
// try{
// startEqualiser();
// }catch (Exception e){
// //
// }
}
}
private void setSeekbarTime(int position, int duration) {
int curr_time_seconds = (position / 1000) % 60;
int curr_time_minutes = (position / 1000) / 60;
int dur_time_seconds = (duration / 1000) % 60;
int dur_time_minutes = (duration / 1000) / 60;
String current_zero_minutes = "0";
String current_zero_seconds = "0";
String duration_zero_minues = "0";
String duration_zero_seconds = "0";
if (curr_time_minutes > 9)
current_zero_minutes = "";
if (curr_time_seconds > 9)
current_zero_seconds = "";
if (dur_time_minutes > 9)
duration_zero_minues = "";
if (dur_time_seconds > 9)
duration_zero_seconds = "";
seekCurrentDuration.setText(current_zero_minutes + curr_time_minutes + ":" + current_zero_seconds + curr_time_seconds);
seekTotalDuration.setText(duration_zero_minues + dur_time_minutes + ":" + duration_zero_seconds + dur_time_seconds);
}
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(VOLUME_BUTTON)) {
volumeControl();
}
if (intent.getAction().equals(isPlay)) {
boolean show = intent.getBooleanExtra("showPanel", false);
if (show) {
//show Panel here
slideLayout.setPanelState(SlidingUpPanelLayout.PanelState.COLLAPSED);
updateTextInfo();
}
} else if (intent.getAction().equals(NOTIFICATION_ACTION)) {
int action = intent.getIntExtra("action", 0);
switch (action) {
case 1:
changePlayBtn();
break;
case 2:
updateTextInfo();
break;
case 3:
updateTextInfo();
break;
case 4:
audioVisualization.release();
break;
default:
break;
}
}
}
};
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
/**
* Defines callbacks for service binding, passed to bindService()
*/
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className,
IBinder service) {
// We've bound to LocalService, cast the IBinder and get LocalService instance
MusicService.LocalBinder binder = (MusicService.LocalBinder) service;
mService = binder.getService();
mBound = true;
}
@Override
public void onServiceDisconnected(ComponentName arg0) {
mBound = false;
}
};
public void playBtn(View view) {
if (mBound) {
mService.play();
changePlayBtn();
}
}
private void changePlayBtn() {
if (mediaPlayer != null) {
if (mediaPlayer.isPlaying()) {
playBtn.setImageResource(R.drawable.ic_pause_button);
} else {
playBtn.setImageResource(R.drawable.ic_play_arrow);
}
}
}
@Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
setSeekbarTime(i, mediaPlayer.getDuration());
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
mService.changeSeekTo(seekBar.getProgress());
}
public void previousBtn(View view) {
if (mBound) {
mService.previous();
updateTextInfo();
}
}
public void nextBtn(View view) {
if (mBound) {
mService.next();
updateTextInfo();
}
}
public void startEqualiser() {
try {
vizualizerHandler = VisualizerDbmHandler.Factory.newVisualizerHandler(getApplicationContext(), mediaPlayer);
audioVisualization.linkTo(vizualizerHandler);
} catch (Exception e) {
// TODO change it to snackbar message
Toast.makeText(mService, "Please Give Mic Permission", Toast.LENGTH_SHORT).show();
}
}
public void updateAlbumArt() {
Glide
.with(getApplicationContext())
.load(songThumb.get(musicPosition))
.placeholder(R.drawable.ic_default_icon)
.into(panelAlbumart);
Glide
.with(getApplicationContext())
.load(songThumb.get(musicPosition))
.placeholder(R.drawable.ic_default_icon)
.into(albumArt);
}
}
这是我的MusicService.class
public class MusicService extends MediaBrowserServiceCompat implements
MediaPlayer.OnCompletionListener,
AudioManager.OnAudioFocusChangeListener {
private static final String LOGTAG = "Friday";
public static int musicPosition;
public static MediaPlayer mediaPlayer;
Uri u;
// Binder given to clients
private final IBinder mBinder = new LocalBinder();
Notification status;
@Override
public void onCreate() {
super.onCreate();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent != null && intent.getExtras() != null && intent.getExtras().containsKey("pos")) {
musicPosition = intent.getIntExtra("pos", 0);
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.reset();
mediaPlayer.release();
}
if (arrayList != null) {
u = Uri.parse(songPath.get(musicPosition));
mediaPlayer = MediaPlayer.create(getApplicationContext(), u);
}
try {
playSong();
} catch (Exception e) {
next();
}
}
if (intent.getAction() != null) {
if (intent.getAction().equals(Constants.ACTION.PREV_ACTION)) {
previous();
} else if (intent.getAction().equals(Constants.ACTION.PLAY_ACTION)) {
play();
sendAction(1);
} else if (intent.getAction().equals(Constants.ACTION.NEXT_ACTION)) {
next();
}
}
return super.onStartCommand(intent, flags, startId);
}
private void playSong() {
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.start();
showNotification();
}
private void sendAction(int action){
/* 1 for play or pause
* 2 for next
* 3 for previous
*/
Intent intent = new Intent();
intent.setAction(MainContainer.NOTIFICATION_ACTION);
intent.putExtra("action",action);
sendBroadcast(intent);
}
public int getPosition() {
return musicPosition;
}
public int getCurrentDuration() {
return mediaPlayer.getCurrentPosition();
}
public int getDuration() {
return mediaPlayer.getDuration();
}
public void changeSeekTo(int progress) {
mediaPlayer.seekTo(progress);
}
/**
* Class used for the client Binder. Because we know this service always
* runs in the same process as its clients, we don't need to deal with IPC.
*/
public class LocalBinder extends Binder {
public MusicService getService() {
// Return this instance of LocalService so clients can call public methods
return MusicService.this;
}
}
public void next() {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
musicPosition = (musicPosition + 1) % songPath.size();
u = Uri.parse(songPath.get(musicPosition));
mediaPlayer = MediaPlayer.create(getApplicationContext(), u);
playSong();
sendAction(2);
}
}
public void previous() {
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
musicPosition = (musicPosition - 1 < 0) ? songPath.size() - 1 : musicPosition - 1;
u = Uri.parse(songPath.get(musicPosition));
mediaPlayer = MediaPlayer.create(getApplicationContext(), u);
playSong();
sendAction(3);
}
}
public void play() {
if (mediaPlayer != null) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
showNotification();
} else {
mediaPlayer.start();
showNotification();
}
}
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
@Override
public void onAudioFocusChange(int i) {
mediaPlayer.stop();
}
@Override
public void onCompletion(MediaPlayer mediaPlayer) {
sendAction(4);
next();
}
@Nullable
@Override
public BrowserRoot onGetRoot(@NonNull String clientPackageName, int clientUid, @Nullable Bundle rootHints) {
return null;
}
@Override
public void onLoadChildren(@NonNull String parentId, @NonNull Result<List<MediaBrowserCompat.MediaItem>> result) {
}
.
.
.
}
我不知道发生了什么。 任何人都可以知道它。
答案 0 :(得分：0)