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[このチュートリアル]（http://www.tutorialsface.com/2015/08/android-custom-notification-tutorial）通知に表示されたコントロールが終了しましたが、すべてが応答しません（作成者が含むトーストを表示する以外）。通知内の音楽コントロール
コントロールは音楽サービスにバインドされていないようです。私はブロードキャストの作成を試み、通知内から直接サービスを呼び出して、サービスの新しいインスタンスを作成しました。私はそれらのすべてを覚えることさえできないほど多くのことを試みました。私は人々が似たような質問をするのを見たことがあるが、私が試みたものは何も働かない今私は自分が「正しい道」にいると思ったときに私が混乱してしまったことをたくさん試しました。どのようにこれらのコントロールを適切に機能させるための任意のアイデアですか？
通知サービス：
public class NotificationService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent.getAction().equals(Constant.ACTION.STARTFOREGROUND_ACTION)) {
showNotification();
Toast.makeText(this, "Service Started", Toast.LENGTH_SHORT).show();
} else if (intent.getAction().equals(Constant.ACTION.PREV_ACTION)) {
Toast.makeText(this, "Clicked Previous", Toast.LENGTH_SHORT).show();
Log.i("NS", "Clicked Previous");
} else if (intent.getAction().equals(Constant.ACTION.PLAY_ACTION)) {
Log.i("NS", "Clicked Play");
} else if (intent.getAction().equals(Constant.ACTION.NEXT_ACTION)) {
Toast.makeText(this, "Clicked Next", Toast.LENGTH_SHORT).show();
Log.i("NS", "Clicked Next");
} else if (intent.getAction().equals(
Constant.ACTION.STOPFOREGROUND_ACTION)) {
Log.i("NS", "Received Stop Foreground Intent");
Toast.makeText(this, "Service Stoped", Toast.LENGTH_SHORT).show();
stopForeground(true);
stopSelf();
}
return START_STICKY;
}
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
public void showNotification() {
Notification status;
// Using RemoteViews to bind custom layouts into Notification
RemoteViews views = new RemoteViews(getPackageName(),
R.layout.status_bar);
RemoteViews bigViews = new RemoteViews(getPackageName(),
R.layout.status_bar_expanded);
// showing default album image
views.setViewVisibility(R.id.status_bar_icon, View.VISIBLE);
views.setViewVisibility(R.id.status_bar_album_art, View.GONE);
bigViews.setImageViewBitmap(R.id.status_bar_album_art,
Constant.getDefaultAlbumArt(this));
Intent notificationIntent = new Intent(this, NotificationService.class);
notificationIntent.setAction(Constant.ACTION.MAIN_ACTION);
notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
notificationIntent, 0);
Intent previousIntent = new Intent(this, NotificationService.class);
previousIntent.setAction(Constant.ACTION.PREV_ACTION);
PendingIntent ppreviousIntent = PendingIntent.getService(this, 0,
previousIntent, 0);
Intent playIntent = new Intent(this, NotificationService.class);
playIntent.setAction(Constant.ACTION.PLAY_ACTION);
PendingIntent pplayIntent = PendingIntent.getService(this, 0,
playIntent, 0);
Intent nextIntent = new Intent(this, NotificationService.class);
nextIntent.setAction(Constant.ACTION.NEXT_ACTION);
PendingIntent pnextIntent = PendingIntent.getService(this, 0,
nextIntent, 0);
Intent closeIntent = new Intent(this, NotificationService.class);
closeIntent.setAction(Constant.ACTION.STOPFOREGROUND_ACTION);
PendingIntent pcloseIntent = PendingIntent.getService(this, 0,
closeIntent, 0);
views.setOnClickPendingIntent(R.id.status_bar_play, pplayIntent);
bigViews.setOnClickPendingIntent(R.id.status_bar_play, pplayIntent);
views.setOnClickPendingIntent(R.id.status_bar_next, pnextIntent);
bigViews.setOnClickPendingIntent(R.id.status_bar_next, pnextIntent);
views.setOnClickPendingIntent(R.id.status_bar_prev, ppreviousIntent);
bigViews.setOnClickPendingIntent(R.id.status_bar_prev, ppreviousIntent);
views.setOnClickPendingIntent(R.id.status_bar_collapse, pcloseIntent);
bigViews.setOnClickPendingIntent(R.id.status_bar_collapse, pcloseIntent);
views.setImageViewResource(R.id.status_bar_play,
R.drawable.apollo_holo_dark_pause);
bigViews.setImageViewResource(R.id.status_bar_play,
R.drawable.apollo_holo_dark_pause);
views.setTextViewText(R.id.status_bar_track_name, "Song Title");
bigViews.setTextViewText(R.id.status_bar_track_name, "Song Title");
views.setTextViewText(R.id.status_bar_artist_name, "Artist Name");
bigViews.setTextViewText(R.id.status_bar_artist_name, "Artist Name");
bigViews.setTextViewText(R.id.status_bar_album_name, "Album Name");
status = new Notification.Builder(this).build();
status.contentView = views;
status.bigContentView = bigViews;
status.flags = Notification.FLAG_ONGOING_EVENT;
status.icon = R.drawable.ic_launcher;
status.contentIntent = pendingIntent;
startForeground(Constant.NOTIFICATION_ID.FOREGROUND_SERVICE, status);
}
}
MusicService：
public class MusicService extends Service implements
MediaPlayer.OnPreparedListener, MediaPlayer.OnErrorListener,
MediaPlayer.OnCompletionListener {
//media player
private MediaPlayer player;
//song list
private ArrayList<Song> songs;
//current position
private int songPosn;
private final IBinder musicBind = new MusicBinder();
private String songTitle="";
private static final int NOTIFY_ID=1;
private boolean shuffle=false;
private Random rand;
public void onCreate(){
//create the service
super.onCreate();
songPosn=0;
player = new MediaPlayer();
initMusicPlayer();
rand=new Random();
}
public void initMusicPlayer(){
//set player properties
player.setWakeMode(getApplicationContext(),
PowerManager.PARTIAL_WAKE_LOCK);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setOnPreparedListener(this);
player.setOnCompletionListener(this);
player.setOnErrorListener(this);
}
public void setList(ArrayList<Song> theSongs){
songs=theSongs;
}
public class MusicBinder extends Binder {
MusicService getService() {
return MusicService.this;
}
}
public void setShuffle(){
if(shuffle) shuffle=false;
else shuffle=true;
}
public void playSong(){
player.reset();
//get song
Song playSong = songs.get(songPosn);
//get id
long currSong = playSong.getID();
//set uri
Uri trackUri = ContentUris.withAppendedId(
android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
currSong);
try{
player.setDataSource(getApplicationContext(), trackUri);
}
catch(Exception e){
Log.e("MUSIC SERVICE", "Error setting data source", e);
}
player.prepareAsync();
songTitle=playSong.getTitle();
}
public void setSong(int songIndex){
songPosn=songIndex;
}
public int getPosn(){
return player.getCurrentPosition();
}
public int getDur(){
return player.getDuration();
}
public boolean isPng(){
return player.isPlaying();
}
public void pausePlayer(){
player.pause();
}
public void seek(int posn){
player.seekTo(posn);
}
public void go(){
player.start();
}
public void playPrev(){
songPosn--;
if(songPosn<0) songPosn=songs.size()-1;
playSong();
}
//skip to next
public void playNext(){
if(shuffle){
int newSong = songPosn;
while(newSong==songPosn){
newSong=rand.nextInt(songs.size());
}
songPosn=newSong;
}
else{
songPosn++;
if(songPosn>=songs.size()) songPosn=0;
}
playSong();
}
@Override
public void onDestroy() {
stopForeground(true);
}
@Override
public IBinder onBind(Intent intent) {
return musicBind;
}
@Override
public boolean onUnbind(Intent intent){
player.stop();
player.release();
return false;
}
@Override
public void onCompletion(MediaPlayer mp) {
if(player.getCurrentPosition()>0){
mp.reset();
playNext();
}
}
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
mp.reset();
return false;
}
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onPrepared(MediaPlayer mp) {
//start playback
mp.start();
Intent onPreparedIntent = new Intent("MEDIA_PLAYER_PREPARED");
LocalBroadcastManager.getInstance(this).sendBroadcast(onPreparedIntent);
Intent notIntent = new Intent(this, MusicPlayer.class);
notIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendInt = PendingIntent.getActivity(this, 0,
notIntent, PendingIntent.FLAG_UPDATE_CURRENT);
Notification.Builder builder = new Notification.Builder(this);
builder.setContentIntent(pendInt)
.setSmallIcon(R.drawable.player_play)
.setTicker(songTitle)
.setOngoing(true)
.setContentTitle("Playing")
.setContentText(songTitle);
Notification not = builder.build();
Intent serviceIntent = new Intent(MusicService.this, NotificationService.class);
serviceIntent.setAction(Constant.ACTION.STARTFOREGROUND_ACTION);
startService(serviceIntent);
}
}
音楽プレーヤー：
public class MusicPlayer extends AppCompatActivity implements MediaPlayerControl {
private ArrayList<Song> songList;
private ListView songView;
public MusicService musicSrv;
private Intent playIntent;
private boolean musicBound=false;
private MusicController controller;
private boolean paused=false, playbackPaused=false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_music_player);
songView = (ListView)findViewById(R.id.song_list);
songList = new ArrayList<Song>();
getSongList();
Collections.sort(songList, new Comparator<Song>(){
public int compare(Song a, Song b){
return a.getArtist().compareTo(b.getArtist());
}
});
songAdapter songAdt = new songAdapter(this, songList);
songView.setAdapter(songAdt);
setController();
FloatingActionButton fabRandom = (FloatingActionButton)findViewById(R.id.fabRandom);
fabRandom.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
//play next
private void playNext(){
musicSrv.playNext();
if(playbackPaused){
setController();
playbackPaused=false;
}
controller.show(0);
}
private void playPrev(){
musicSrv.playPrev();
if(playbackPaused){
setController();
playbackPaused=false;
}
controller.show(0);
}
public void songPicked(View view){
musicSrv.setSong(Integer.parseInt(view.getTag().toString()));
musicSrv.playSong();
if(playbackPaused){
setController();
playbackPaused=false;
}
setController();
controller.show(0);
}
@Override
protected void onPause(){
super.onPause();
paused=true;
}
@Override
protected void onResume(){
super.onResume();
// Set up receiver for media player onPrepared broadcast
LocalBroadcastManager.getInstance(this).registerReceiver(onPrepareReceiver,
new IntentFilter("MEDIA_PLAYER_PREPARED"));
if(paused){
setController();
paused=false;
}
}
@Override
protected void onStop() {
super.onStop();
}
private void setController(){
//set the controller up
if (controller == null) controller = new MusicController(this);
controller.invalidate();
controller.setPrevNextListeners(new View.OnClickListener() {
@Override
public void onClick(View v) {
playNext();
}
}, new View.OnClickListener() {
@Override
public void onClick(View v) {
playPrev();
}
});
controller.setMediaPlayer(this);
controller.setAnchorView(findViewById(R.id.song_list));
}
@Override
public void onBackPressed() {
moveTaskToBack(true);
Intent intent = new Intent (getApplicationContext(), FitnessActivity.class);
startActivity(intent);
}
// Broadcast receiver to determine when music player has been prepared
private BroadcastReceiver onPrepareReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context c, Intent i) {
// When music player has been prepared, show controller
controller.show(0);
}
};
private BroadcastReceiver onNextClickedReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
musicSrv.playNext();
}
};
//connect to the service
public ServiceConnection musicConnection = new ServiceConnection(){
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
MusicService.MusicBinder binder = (MusicService.MusicBinder)service;
//get service
musicSrv = binder.getService();
//pass list
musicSrv.setList(songList);
musicBound = true;
}
@Override
public void onServiceDisconnected(ComponentName name) {
musicBound = false;
}
};
@Override
protected void onStart() {
super.onStart();
if(playIntent==null){
playIntent = new Intent(this, MusicService.class);
bindService(playIntent, musicConnection, Context.BIND_AUTO_CREATE);
startService(playIntent);
setController();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_shuffle:
musicSrv.setShuffle();
break;
case R.id.action_end:
stopService(playIntent);
musicSrv=null;
System.exit(0);
break;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onDestroy() {
stopService(playIntent);
musicSrv=null;
super.onDestroy();
}
public void getSongList() {
//retrieve song info
ContentResolver musicResolver = getContentResolver();
Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);
if(musicCursor!=null && musicCursor.moveToFirst()){
//get columns
int titleColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.TITLE);
int idColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media._ID);
int artistColumn = musicCursor.getColumnIndex
(android.provider.MediaStore.Audio.Media.ARTIST);
int durationColumn = musicCursor.getColumnIndex
(MediaStore.Audio.Media.DURATION);
//add songs to list
do {
long thisId = musicCursor.getLong(idColumn);
String thisTitle = musicCursor.getString(titleColumn);
String thisArtist = musicCursor.getString(artistColumn);
long thisDuration = musicCursor.getLong(durationColumn);
if (thisDuration>10000){
songList.add(new Song(thisId, thisTitle, thisArtist, thisDuration));}
}
while (musicCursor.moveToNext());
}
}
@Override
public void start() {
musicSrv.go();
}
@Override
public void pause() {
playbackPaused=true;
musicSrv.pausePlayer();
}
@Override
public int getDuration() {
if(musicSrv!=null && musicBound && musicSrv.isPng())
return musicSrv.getDur();
else return 0;
}
@Override
public int getCurrentPosition() {
if(musicSrv!=null && musicBound && musicSrv.isPng())
return musicSrv.getPosn();
else return 0;
}
@Override
public void seekTo(int pos) {
musicSrv.seek(pos);
}
@Override
public boolean isPlaying() {
if(musicSrv!=null && musicBound)
return musicSrv.isPng();
return false;
}
@Override
public int getBufferPercentage() {
return 0;
}
@Override
public boolean canPause() {
return true;
}
@Override
public boolean canSeekBackward() {
return true;
}
@Override
public boolean canSeekForward() {
return true;
}
@Override
public int getAudioSessionId() {
return 0;
}
public void onNextNotification(){
}
}
マニフェスト：
<activity
android:name=".MusicPlayer"
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".MusicService"
/>
<service android:name=".NotificationService" />
onStartCommand（）は呼び出されませんか？それとも、それは電話だが意図的ではない行動をしているのだろうかメソッド呼び出しを記録しようとします。 –
呼び出されましたが、意図は何もしていないようです。実際のサービスに縛られていないようです。このチュートリアルでは、サービスはビューを使用してバインドされていると述べていますが、bigviewは推奨されていません。したがって、notifのコントロールは基本的には何もしません。 – Joe