onCompletionListener() 不是每次都调用并且随机播放和重复效果不佳
onCompeletionListener() not called every time and shuffle and repeat not working well
public class SongPlayerActivity extends AppCompatActivity implements MediaPlayer.OnCompletionListener {
static MediaPlayer mediaPlayer;
TextView songName, artistName, albumName, durationPlayed, totalDuration;
ImageView next, previous, songImage, shuffle, repeat;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
SeekBar seekBar;
FloatingActionButton floatingActionButton;
List<Song> songList = new ArrayList<>();
Handler handler = new Handler();
Thread playPauseThread, nextThread, previousThread;
private Uri uri;
private int position;
boolean shuffleBoolean, repeatBoolean;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_song_player);
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
songList = getIntent().getParcelableArrayListExtra("songsList");
position = getIntent().getIntExtra("position", 0);
songImage = findViewById(R.id.album_cover);
songName = findViewById(R.id.music_name);
albumName = findViewById(R.id.album_name);
artistName = findViewById(R.id.artist_name);
seekBar = findViewById(R.id.seek_bar);
durationPlayed = findViewById(R.id.played_duration);
totalDuration = findViewById(R.id.music_duration);
repeat = findViewById(R.id.repeat);
shuffle = findViewById(R.id.shuffle);
floatingActionButton = findViewById(R.id.play_pause);
next = findViewById(R.id.next);
previous = findViewById(R.id.previous);
playMusic();
mediaPlayer.setOnCompletionListener(this);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (mediaPlayer != null && fromUser) {
mediaPlayer.seekTo(progress * 1000);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
durationPlayed.setText(durationConversion(currentPosition));
}
handler.postDelayed(this, 200);
}
});
if (sharedPreferences.getBoolean("playerShuffle", false)) {
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_24);
shuffleBoolean = true;
}
else {
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_off_24);
shuffleBoolean = false;
}
if (sharedPreferences.getBoolean("playerRepeat", false)) {
repeat.setImageResource(R.drawable.ic_baseline_repeat_24);
repeatBoolean = true;
}
else {
repeat.setImageResource(R.drawable.ic_baseline_repeat_24_off);
repeatBoolean = false;
}
shuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (sharedPreferences.getBoolean("playerShuffle", false)) {
editor = sharedPreferences.edit();
editor.putBoolean("playerShuffle", false);
editor.commit();
shuffleBoolean = false;
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_off_24);
Toast.makeText(getApplicationContext(), R.string.shuffle_off, Toast.LENGTH_SHORT).show();
} else {
editor = sharedPreferences.edit();
editor.putBoolean("playerShuffle", true);
editor.commit();
shuffleBoolean = true;
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_24);
Toast.makeText(getApplicationContext(), R.string.shuffle_on, Toast.LENGTH_SHORT).show();
}
}
});
repeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (sharedPreferences.getBoolean("playerRepeat", false)) {
editor = sharedPreferences.edit();
editor.putBoolean("playerRepeat", false);
editor.commit();
repeatBoolean = false;
repeat.setImageResource(R.drawable.ic_baseline_repeat_24_off);
Toast.makeText(getApplicationContext(), R.string.repeat_off, Toast.LENGTH_LONG).show();
} else {
editor = sharedPreferences.edit();
editor.putBoolean("playerRepeat", true);
editor.commit();
repeatBoolean = true;
repeat.setImageResource(R.drawable.ic_baseline_repeat_24);
Toast.makeText(getApplicationContext(), R.string.repeat_on, Toast.LENGTH_LONG).show();
}
}
});
}
public String durationConversion(int songDuration) {
long s = songDuration % 60;
long m = (songDuration / 60) % 60;
long h = (songDuration / (60 * 60)) % 24;
return String.format("%02d:%02d:%02d", h, m, s);
}
void playPauseButton() {
playPauseThread = new Thread() {
@Override
public void run() {
super.run();
floatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
floatingActionButton.setImageResource(R.drawable.ic_baseline_play_arrow_24);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
} else {
mediaPlayer.start();
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
}
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
}
};
playPauseThread.start();
}
private void nextButton() {
nextThread = new Thread() {
@Override
public void run() {
super.run();
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position++;
if (position == songList.size())
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
} else {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position++;
if (position == songList.size())
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
}
mediaPlayer.start();
}
});
}
};
nextThread.start();
}
private void previousButton() {
previousThread = new Thread() {
@Override
public void run() {
super.run();
previous.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position--;
if (position < 0)
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
} else {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position--;
if (position < 0)
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
}
mediaPlayer.start();
}
});
}
};
previousThread.start();
}
private int random(int i) {
Random random = new Random();
return random.nextInt(i+1);
}
public void metaDataRetriever(Uri uri) {
MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
mediaMetadataRetriever.setDataSource(uri.getPath());
byte[] bytes = mediaMetadataRetriever.getEmbeddedPicture();
final LinearLayout linearLayout = findViewById(R.id.linear_layout);
Bitmap bitmap;
if (bytes != null) {
bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
layoutAnimation(getApplicationContext(), songImage, bitmap);
Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {
@Override
public void onGenerated(@Nullable Palette palette) {
Palette.Swatch swatch = Objects.requireNonNull(palette).getDominantSwatch();
if (swatch != null) {
GradientDrawable gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.BOTTOM_TOP, new int[]{0xff000000, swatch.getRgb()});
linearLayout.setBackground(gradientDrawable);
songName.setTextColor(swatch.getTitleTextColor());
albumName.setTextColor(swatch.getTitleTextColor());
artistName.setTextColor(swatch.getTitleTextColor());
durationPlayed.setTextColor(Color.WHITE);
totalDuration.setTextColor(Color.WHITE);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
floatingActionButton.getBackground().setTint(Color.WHITE);
next.setImageResource(R.drawable.ic_baseline_skip_next_white_24);
previous.setImageResource(R.drawable.ic_baseline_skip_previous_white_24);
seekBar.getThumb().setTint(Color.WHITE);
}
}
});
} else {
layoutAnimation(getApplicationContext(), songImage, null);
linearLayout.setBackgroundResource(R.drawable.gradient_brown);
songName.setTextColor(Color.DKGRAY);
albumName.setTextColor(Color.DKGRAY);
artistName.setTextColor(Color.DKGRAY);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
next.setImageResource(R.drawable.ic_baseline_skip_next_24);
previous.setImageResource(R.drawable.ic_baseline_skip_previous_24);
seekBar.getThumb().setTint(getResources().getColor(R.color.colorYellow));
durationPlayed.setTextColor(getResources().getColor(R.color.colorYellow));
totalDuration.setTextColor(getResources().getColor(R.color.colorYellow));
}
songName.setText(songList.get(position).songName);
albumName.setText(songList.get(position).albumName);
artistName.setText(songList.get(position).artistName);
totalDuration.setText(Song.durationConversion(songList.get(position).songDuration));
}
public void playMusic() {
if (songList != null) {
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
uri = Uri.parse(songList.get(position).path);
}
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
}
mediaPlayer = MediaPlayer.create(getApplicationContext(), uri);
mediaPlayer.start();
metaDataRetriever(uri);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
}
public void layoutAnimation(final Context context, final ImageView imageView, final Bitmap bitmap) {
final Animation animationIn = AnimationUtils.loadAnimation(context, android.R.anim.fade_in);
Animation animationOut = AnimationUtils.loadAnimation(context, android.R.anim.fade_out);
if (bitmap != null)
animationOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
Glide.with(context).load(bitmap).into(imageView);
animationIn.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationIn);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
else
animationOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
Glide.with(context).load(R.drawable.album_cover).into(imageView);
animationIn.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationIn);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationOut);
}
@Override
protected void onResume() {
super.onResume();
playPauseButton();
nextButton();
previousButton();
}
@Override
public void onCompletion(MediaPlayer mp) {
nextButton();
position++;
if(position >= songList.size())
position = 0;
if (mediaPlayer != null) {
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
metaDataRetriever(Uri.parse(songList.get(position).path));
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(this);
}
}
}
我这里有两个问题：
- 是当前播放音乐结束时调用onCompletionListener()也就是调用nextButton()
它检查 shuffleBoolean 和 repeatBoolean 状态是否为真，这里的问题是当 shuffleBoolean 和 repeatBoolean 为真时，无论 shuffleBoolean 和 repeatBoolean 状态如何，SongList 都会连续播放，但是如果我按下一个或一个按钮，它会检查 repeatBoolean 和 shuffleBoolean 状态并根据状态正确播放下一首歌曲。
- 有时当我将 seekBar 移动到栏中的任何位置（秒）时，歌曲列表会在当前播放歌曲结束时停止播放
对于第一个问题，我的描述可能太长了，但我想说清楚并提前致谢。
解决方案是在 onCompltition() 中调用 next.performClick() 并删除所有其他行。
我不知道第一种方法不起作用的原因，但我想到了它，因为我需要在不单击按钮的情况下调用 onClickListener()。
public class SongPlayerActivity extends AppCompatActivity implements MediaPlayer.OnCompletionListener {
static MediaPlayer mediaPlayer;
TextView songName, artistName, albumName, durationPlayed, totalDuration;
ImageView next, previous, songImage, shuffle, repeat;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
SeekBar seekBar;
FloatingActionButton floatingActionButton;
List<Song> songList = new ArrayList<>();
Handler handler = new Handler();
Thread playPauseThread, nextThread, previousThread;
private Uri uri;
private int position;
boolean shuffleBoolean, repeatBoolean;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_song_player);
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
songList = getIntent().getParcelableArrayListExtra("songsList");
position = getIntent().getIntExtra("position", 0);
songImage = findViewById(R.id.album_cover);
songName = findViewById(R.id.music_name);
albumName = findViewById(R.id.album_name);
artistName = findViewById(R.id.artist_name);
seekBar = findViewById(R.id.seek_bar);
durationPlayed = findViewById(R.id.played_duration);
totalDuration = findViewById(R.id.music_duration);
repeat = findViewById(R.id.repeat);
shuffle = findViewById(R.id.shuffle);
floatingActionButton = findViewById(R.id.play_pause);
next = findViewById(R.id.next);
previous = findViewById(R.id.previous);
playMusic();
mediaPlayer.setOnCompletionListener(this);
seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (mediaPlayer != null && fromUser) {
mediaPlayer.seekTo(progress * 1000);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
durationPlayed.setText(durationConversion(currentPosition));
}
handler.postDelayed(this, 200);
}
});
if (sharedPreferences.getBoolean("playerShuffle", false)) {
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_24);
shuffleBoolean = true;
}
else {
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_off_24);
shuffleBoolean = false;
}
if (sharedPreferences.getBoolean("playerRepeat", false)) {
repeat.setImageResource(R.drawable.ic_baseline_repeat_24);
repeatBoolean = true;
}
else {
repeat.setImageResource(R.drawable.ic_baseline_repeat_24_off);
repeatBoolean = false;
}
shuffle.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (sharedPreferences.getBoolean("playerShuffle", false)) {
editor = sharedPreferences.edit();
editor.putBoolean("playerShuffle", false);
editor.commit();
shuffleBoolean = false;
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_off_24);
Toast.makeText(getApplicationContext(), R.string.shuffle_off, Toast.LENGTH_SHORT).show();
} else {
editor = sharedPreferences.edit();
editor.putBoolean("playerShuffle", true);
editor.commit();
shuffleBoolean = true;
shuffle.setImageResource(R.drawable.ic_baseline_shuffle_24);
Toast.makeText(getApplicationContext(), R.string.shuffle_on, Toast.LENGTH_SHORT).show();
}
}
});
repeat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (sharedPreferences.getBoolean("playerRepeat", false)) {
editor = sharedPreferences.edit();
editor.putBoolean("playerRepeat", false);
editor.commit();
repeatBoolean = false;
repeat.setImageResource(R.drawable.ic_baseline_repeat_24_off);
Toast.makeText(getApplicationContext(), R.string.repeat_off, Toast.LENGTH_LONG).show();
} else {
editor = sharedPreferences.edit();
editor.putBoolean("playerRepeat", true);
editor.commit();
repeatBoolean = true;
repeat.setImageResource(R.drawable.ic_baseline_repeat_24);
Toast.makeText(getApplicationContext(), R.string.repeat_on, Toast.LENGTH_LONG).show();
}
}
});
}
public String durationConversion(int songDuration) {
long s = songDuration % 60;
long m = (songDuration / 60) % 60;
long h = (songDuration / (60 * 60)) % 24;
return String.format("%02d:%02d:%02d", h, m, s);
}
void playPauseButton() {
playPauseThread = new Thread() {
@Override
public void run() {
super.run();
floatingActionButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
floatingActionButton.setImageResource(R.drawable.ic_baseline_play_arrow_24);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
} else {
mediaPlayer.start();
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
}
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
}
};
playPauseThread.start();
}
private void nextButton() {
nextThread = new Thread() {
@Override
public void run() {
super.run();
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position++;
if (position == songList.size())
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
} else {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position++;
if (position == songList.size())
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
}
mediaPlayer.start();
}
});
}
};
nextThread.start();
}
private void previousButton() {
previousThread = new Thread() {
@Override
public void run() {
super.run();
previous.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position--;
if (position < 0)
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
} else {
mediaPlayer.stop();
mediaPlayer.release();
if(shuffleBoolean && !repeatBoolean)
position = random(songList.size()-1);
else if (!shuffleBoolean && !repeatBoolean)
position--;
if (position < 0)
position = 0;
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
metaDataRetriever(Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
SongPlayerActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if (mediaPlayer != null) {
int currentPosition = mediaPlayer.getCurrentPosition() / 1000;
seekBar.setProgress(currentPosition);
}
handler.postDelayed(this, 200);
}
});
mediaPlayer.setOnCompletionListener(SongPlayerActivity.this);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
}
mediaPlayer.start();
}
});
}
};
previousThread.start();
}
private int random(int i) {
Random random = new Random();
return random.nextInt(i+1);
}
public void metaDataRetriever(Uri uri) {
MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
mediaMetadataRetriever.setDataSource(uri.getPath());
byte[] bytes = mediaMetadataRetriever.getEmbeddedPicture();
final LinearLayout linearLayout = findViewById(R.id.linear_layout);
Bitmap bitmap;
if (bytes != null) {
bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
layoutAnimation(getApplicationContext(), songImage, bitmap);
Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {
@Override
public void onGenerated(@Nullable Palette palette) {
Palette.Swatch swatch = Objects.requireNonNull(palette).getDominantSwatch();
if (swatch != null) {
GradientDrawable gradientDrawable = new GradientDrawable(GradientDrawable.Orientation.BOTTOM_TOP, new int[]{0xff000000, swatch.getRgb()});
linearLayout.setBackground(gradientDrawable);
songName.setTextColor(swatch.getTitleTextColor());
albumName.setTextColor(swatch.getTitleTextColor());
artistName.setTextColor(swatch.getTitleTextColor());
durationPlayed.setTextColor(Color.WHITE);
totalDuration.setTextColor(Color.WHITE);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
floatingActionButton.getBackground().setTint(Color.WHITE);
next.setImageResource(R.drawable.ic_baseline_skip_next_white_24);
previous.setImageResource(R.drawable.ic_baseline_skip_previous_white_24);
seekBar.getThumb().setTint(Color.WHITE);
}
}
});
} else {
layoutAnimation(getApplicationContext(), songImage, null);
linearLayout.setBackgroundResource(R.drawable.gradient_brown);
songName.setTextColor(Color.DKGRAY);
albumName.setTextColor(Color.DKGRAY);
artistName.setTextColor(Color.DKGRAY);
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
next.setImageResource(R.drawable.ic_baseline_skip_next_24);
previous.setImageResource(R.drawable.ic_baseline_skip_previous_24);
seekBar.getThumb().setTint(getResources().getColor(R.color.colorYellow));
durationPlayed.setTextColor(getResources().getColor(R.color.colorYellow));
totalDuration.setTextColor(getResources().getColor(R.color.colorYellow));
}
songName.setText(songList.get(position).songName);
albumName.setText(songList.get(position).albumName);
artistName.setText(songList.get(position).artistName);
totalDuration.setText(Song.durationConversion(songList.get(position).songDuration));
}
public void playMusic() {
if (songList != null) {
floatingActionButton.setImageResource(R.drawable.ic_baseline_pause_24);
uri = Uri.parse(songList.get(position).path);
}
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
}
mediaPlayer = MediaPlayer.create(getApplicationContext(), uri);
mediaPlayer.start();
metaDataRetriever(uri);
seekBar.setMax(mediaPlayer.getDuration() / 1000);
}
public void layoutAnimation(final Context context, final ImageView imageView, final Bitmap bitmap) {
final Animation animationIn = AnimationUtils.loadAnimation(context, android.R.anim.fade_in);
Animation animationOut = AnimationUtils.loadAnimation(context, android.R.anim.fade_out);
if (bitmap != null)
animationOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
Glide.with(context).load(bitmap).into(imageView);
animationIn.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationIn);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
else
animationOut.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
Glide.with(context).load(R.drawable.album_cover).into(imageView);
animationIn.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationIn);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
imageView.startAnimation(animationOut);
}
@Override
protected void onResume() {
super.onResume();
playPauseButton();
nextButton();
previousButton();
}
@Override
public void onCompletion(MediaPlayer mp) {
nextButton();
position++;
if(position >= songList.size())
position = 0;
if (mediaPlayer != null) {
mediaPlayer = MediaPlayer.create(getApplicationContext(), Uri.parse(songList.get(position).path));
seekBar.setMax(mediaPlayer.getDuration() / 1000);
metaDataRetriever(Uri.parse(songList.get(position).path));
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(this);
}
}
}
我这里有两个问题：
- 是当前播放音乐结束时调用onCompletionListener()也就是调用nextButton() 它检查 shuffleBoolean 和 repeatBoolean 状态是否为真，这里的问题是当 shuffleBoolean 和 repeatBoolean 为真时，无论 shuffleBoolean 和 repeatBoolean 状态如何，SongList 都会连续播放，但是如果我按下一个或一个按钮，它会检查 repeatBoolean 和 shuffleBoolean 状态并根据状态正确播放下一首歌曲。
- 有时当我将 seekBar 移动到栏中的任何位置（秒）时，歌曲列表会在当前播放歌曲结束时停止播放
对于第一个问题，我的描述可能太长了，但我想说清楚并提前致谢。
解决方案是在 onCompltition() 中调用 next.performClick() 并删除所有其他行。 我不知道第一种方法不起作用的原因，但我想到了它，因为我需要在不单击按钮的情况下调用 onClickListener()。