我制作了一个应用程序来播放存储在手机中的歌曲以及流式传输音乐网址 . 但Android媒体播放器比exo播放器慢 . 所以我想用exo播放器替换我的代码中的媒体播放器 . 有人可以用适当的方式替换此代码中的媒体播放器吗？
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.audiofx.AudioEffect;
import android.net.Uri;
import android.os.PowerManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;
import etwinkle.solutions.musico.service.playback.Playback;
import com.vaktech.musico.R;
import etwinkle.solutions.musico.util.PreferenceUtil;
public class MultiPlayer implements Playback, MediaPlayer.OnErrorListener, MediaPlayer.OnCompletionListener {
public static final String TAG = MultiPlayer.class.getSimpleName();
private MediaPlayer mCurrentMediaPlayer = new MediaPlayer();
private MediaPlayer mNextMediaPlayer;
private Context context;
@Nullable
private Playback.PlaybackCallbacks callbacks;
private boolean mIsInitialized = false;
/**
* Constructor of <code>MultiPlayer</code>
*/
public MultiPlayer(final Context context) {
this.context = context;
mCurrentMediaPlayer.setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK);
}
/**
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
* @return True if the <code>player</code> has been prepared and is
* ready to play, false otherwise
*/
@Override
public boolean setDataSource(@NonNull final String path) {
mIsInitialized = false;
mIsInitialized = setDataSourceImpl(mCurrentMediaPlayer, path);
if (mIsInitialized) {
setNextDataSource(null);
}
return mIsInitialized;
}
/**
* @param player The {@link MediaPlayer} to use
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
* @return True if the <code>player</code> has been prepared and is
* ready to play, false otherwise
*/
private boolean setDataSourceImpl(@NonNull final MediaPlayer player, @NonNull final String path) {
if (context == null) {
return false;
}
try {
player.reset();
player.setOnPreparedListener(null);
if (path.startsWith("content://")) {
player.setDataSource(context, Uri.parse(path));
} else {
player.setDataSource(path);
}
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.prepare();
} catch (Exception e) {
return false;
}
player.setOnCompletionListener(this);
player.setOnErrorListener(this);
final Intent intent = new Intent(AudioEffect.ACTION_OPEN_AUDIO_EFFECT_CONTROL_SESSION);
intent.putExtra(AudioEffect.EXTRA_AUDIO_SESSION, getAudioSessionId());
intent.putExtra(AudioEffect.EXTRA_PACKAGE_NAME, context.getPackageName());
intent.putExtra(AudioEffect.EXTRA_CONTENT_TYPE, AudioEffect.CONTENT_TYPE_MUSIC);
context.sendBroadcast(intent);
return true;
}
/**
* Set the MediaPlayer to start when this MediaPlayer finishes playback.
*
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
*/
@Override
public void setNextDataSource(@Nullable final String path) {
if (context == null) {
return;
}
try {
mCurrentMediaPlayer.setNextMediaPlayer(null);
} catch (IllegalArgumentException e) {
Log.i(TAG, "Next media player is current one, continuing");
} catch (IllegalStateException e) {
Log.e(TAG, "Media player not initialized!");
return;
}
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
if (path == null) {
return;
}
if (PreferenceUtil.getInstance(context).gaplessPlayback()) {
mNextMediaPlayer = new MediaPlayer();
mNextMediaPlayer.setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK);
mNextMediaPlayer.setAudioSessionId(getAudioSessionId());
if (setDataSourceImpl(mNextMediaPlayer, path)) {
try {
mCurrentMediaPlayer.setNextMediaPlayer(mNextMediaPlayer);
} catch (@NonNull IllegalArgumentException | IllegalStateException e) {
Log.e(TAG, "setNextDataSource: setNextMediaPlayer()", e);
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
}
} else {
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
}
}
}
/**
* Sets the callbacks
*
* @param callbacks The callbacks to use
*/
@Override
public void setCallbacks(final Playback.PlaybackCallbacks callbacks) {
this.callbacks = callbacks;
}
/**
* @return True if the player is ready to go, false otherwise
*/
@Override
public boolean isInitialized() {
return mIsInitialized;
}
/**
* Starts or resumes playback.
*/
@Override
public boolean start() {
try {
mCurrentMediaPlayer.start();
return true;
} catch (IllegalStateException e) {
return false;
}
}
/**
* Resets the MediaPlayer to its uninitialized state.
*/
@Override
public void stop() {
mCurrentMediaPlayer.reset();
mIsInitialized = false;
}
/**
* Releases resources associated with this MediaPlayer object.
*/
@Override
public void release() {
stop();
mCurrentMediaPlayer.release();
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
}
}
/**
* Pauses playback. Call start() to resume.
*/
@Override
public boolean pause() {
try {
mCurrentMediaPlayer.pause();
return true;
} catch (IllegalStateException e) {
return false;
}
}
/**
* Checks whether the MultiPlayer is playing.
*/
@Override
public boolean isPlaying() {
return mIsInitialized && mCurrentMediaPlayer.isPlaying();
}
/**
* Gets the duration of the file.
*
* @return The duration in milliseconds
*/
@Override
public int duration() {
if (!mIsInitialized) {
return -1;
}
try {
return mCurrentMediaPlayer.getDuration();
} catch (IllegalStateException e) {
return -1;
}
}
/**
* Gets the current playback position.
*
* @return The current position in milliseconds
*/
@Override
public int position() {
if (!mIsInitialized) {
return -1;
}
try {
return mCurrentMediaPlayer.getCurrentPosition();
} catch (IllegalStateException e) {
return -1;
}
}
/**
* Gets the current playback position.
*
* @param whereto The offset in milliseconds from the start to seek to
* @return The offset in milliseconds from the start to seek to
*/
@Override
public int seek(final int whereto) {
try {
mCurrentMediaPlayer.seekTo(whereto);
return whereto;
} catch (IllegalStateException e) {
return -1;
}
}
@Override
public boolean setVolume(final float vol) {
try {
mCurrentMediaPlayer.setVolume(vol, vol);
return true;
} catch (IllegalStateException e) {
return false;
}
}
/**
* Sets the audio session ID.
*
* @param sessionId The audio session ID
*/
@Override
public boolean setAudioSessionId(final int sessionId) {
try {
mCurrentMediaPlayer.setAudioSessionId(sessionId);
return true;
} catch (@NonNull IllegalArgumentException | IllegalStateException e) {
return false;
}
}
/**
* Returns the audio session ID.
*
* @return The current audio session ID.
*/
@Override
public int getAudioSessionId() {
return mCurrentMediaPlayer.getAudioSessionId();
}
/**
* {@inheritDoc}
*/
@Override
public boolean onError(final MediaPlayer mp, final int what, final int extra) {
mIsInitialized = false;
mCurrentMediaPlayer.release();
mCurrentMediaPlayer = new MediaPlayer();
mCurrentMediaPlayer.setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK);
if (context != null) {
Toast.makeText(context, context.getResources().getString(R.string.unplayable_file), Toast.LENGTH_SHORT).show();
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public void onCompletion(final MediaPlayer mp) {
if (mp == mCurrentMediaPlayer && mNextMediaPlayer != null) {
mIsInitialized = false;
mCurrentMediaPlayer.release();
mCurrentMediaPlayer = mNextMediaPlayer;
mIsInitialized = true;
mNextMediaPlayer = null;
if (callbacks != null)
callbacks.onTrackWentToNext();
} else {
if (callbacks != null)
callbacks.onTrackEnded();
}
}
}
这是我制作的代码 . 但它没有用 . 这里我首先调用setDatSourceImpl（）然后调用start（） . 但这首歌没有流式传输 .
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.audiofx.AudioEffect;
import android.net.Uri;
import android.os.PowerManager;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.Log;
import android.widget.Toast;
import com.google.android.exoplayer2.DefaultLoadControl;
import com.google.android.exoplayer2.DefaultRenderersFactory;
import com.google.android.exoplayer2.ExoPlayer;
import com.google.android.exoplayer2.ExoPlayerFactory;
import com.google.android.exoplayer2.SimpleExoPlayer;
import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
import com.google.android.exoplayer2.extractor.ExtractorsFactory;
import com.google.android.exoplayer2.source.ExtractorMediaSource;
import com.google.android.exoplayer2.source.MediaSource;
import com.google.android.exoplayer2.trackselection.AdaptiveTrackSelection;
import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
import com.google.android.exoplayer2.trackselection.TrackSelection;
import com.google.android.exoplayer2.trackselection.TrackSelector;
import com.google.android.exoplayer2.upstream.BandwidthMeter;
import com.google.android.exoplayer2.upstream.DataSource;
import com.google.android.exoplayer2.upstream.DefaultBandwidthMeter;
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
import com.google.android.exoplayer2.util.Util;
import com.vaktech.musico.R;
import etwinkle.solutions.musico.service.MultiPlayer;
import etwinkle.solutions.musico.service.playback.Playback;
import etwinkle.solutions.musico.util.PreferenceUtil;
/**
* Created by hasitha on 1/10/18.
*/
public class MultiPlayer implements Playback{
public static final String TAG = MultiPlayer.class.getSimpleName();
private SimpleExoPlayer mCurrentMediaPlayer;
private SimpleExoPlayer mNextMediaPlayer;
private BandwidthMeter bandwidthMeter;
private ExtractorsFactory extractorsFactory;
private TrackSelection.Factory trackSelectionFactory;
private TrackSelector trackSelector;
private DefaultBandwidthMeter defaultBandwidthMeter;
private DataSource.Factory dataSourceFactory;
private MediaSource mediaSource;
private Context context;
@Nullable
private Playback.PlaybackCallbacks callbacks;
private boolean mIsInitialized = false;
/**
* Constructor of <code>MultiPlayer</code>
*/
public MultiPlayer(final Context context) {
this.context = context;
mCurrentMediaPlayer = ExoPlayerFactory.newSimpleInstance(
new DefaultRenderersFactory(context),
new DefaultTrackSelector(), new DefaultLoadControl());
bandwidthMeter = new DefaultBandwidthMeter();
extractorsFactory = new DefaultExtractorsFactory();
trackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
trackSelector = new DefaultTrackSelector(trackSelectionFactory);
defaultBandwidthMeter = new DefaultBandwidthMeter();
dataSourceFactory = new DefaultDataSourceFactory(context,
Util.getUserAgent(context, "mediaPlayerSample"), defaultBandwidthMeter);
}
/**
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
* @return True if the <code>player</code> has been prepared and is
* ready to play, false otherwise
*/
@Override
public boolean setDataSource(@NonNull final String path) {
mIsInitialized = false;
mIsInitialized = setDataSourceImpl(mCurrentMediaPlayer, path);
if (mIsInitialized) {
setNextDataSource(null);
}
return mIsInitialized;
}
/**
* @param player The {@link MediaPlayer} to use
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
* @return True if the <code>player</code> has been prepared and is
* ready to play, false otherwise
*/
private boolean setDataSourceImpl(@NonNull ExoPlayer player, @NonNull final String path) {
if (context == null) {
return false;
}
try{
mediaSource = new ExtractorMediaSource(Uri.parse(path), dataSourceFactory, extractorsFactory, null, null);
}catch (IndexOutOfBoundsException in) {
mediaSource = new ExtractorMediaSource(Uri.parse(path), dataSourceFactory, extractorsFactory, null, null);
}
player = ExoPlayerFactory.newSimpleInstance(context, trackSelector);
player.prepare(mediaSource);
Log.d("Exceptions","Here he is ready");
final Intent intent = new Intent(AudioEffect.ACTION_OPEN_AUDIO_EFFECT_CONTROL_SESSION);
intent.putExtra(AudioEffect.EXTRA_AUDIO_SESSION, getAudioSessionId());
intent.putExtra(AudioEffect.EXTRA_PACKAGE_NAME, context.getPackageName());
intent.putExtra(AudioEffect.EXTRA_CONTENT_TYPE, AudioEffect.CONTENT_TYPE_MUSIC);
context.sendBroadcast(intent);
return true;
}
/**
* Set the MediaPlayer to start when this MediaPlayer finishes playback.
*
* @param path The path of the file, or the http/rtsp URL of the stream
* you want to play
*/
@Override
public void setNextDataSource(@Nullable final String path) {
if (context == null) {
return;
}
try {
//mCurrentMediaPlayer.setNextMediaPlayer(null);
} catch (IllegalArgumentException e) {
Log.i(TAG, "Next media player is current one, continuing");
} catch (IllegalStateException e) {
Log.e(TAG, "Media player not initialized!");
return;
}
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
if (path == null) {
return;
}
if (PreferenceUtil.getInstance(context).gaplessPlayback()) {
/*
mNextMediaPlayer = new MediaPlayer();
mNextMediaPlayer.setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK);
mNextMediaPlayer.setAudioSessionId(getAudioSessionId());
if (setDataSourceImpl(mNextMediaPlayer, path)) {
try {
mCurrentMediaPlayer.setNextMediaPlayer(mNextMediaPlayer);
} catch (@NonNull IllegalArgumentException | IllegalStateException e) {
Log.e(TAG, "setNextDataSource: setNextMediaPlayer()", e);
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
}
} else {
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
mNextMediaPlayer = null;
}
}
*/
}
}
/**
* Sets the callbacks
*
* @param callbacks The callbacks to use
*/
@Override
public void setCallbacks(final Playback.PlaybackCallbacks callbacks) {
this.callbacks = callbacks;
}
/**
* @return True if the player is ready to go, false otherwise
*/
@Override
public boolean isInitialized() {
return mIsInitialized;
}
/**
* Starts or resumes playback.
*/
@Override
public boolean start() {
try {
mCurrentMediaPlayer.setPlayWhenReady(true);
Log.d("Exceptions","Here Legal");
return true;
} catch (IllegalStateException e) {
Log.d("Exceptions","Here Illegal");
return false;
}
}
/**
* Resets the MediaPlayer to its uninitialized state.
*/
@Override
public void stop() {
mCurrentMediaPlayer.release();
mIsInitialized = false;
Log.d("Exceptions","Here stop please");
}
/**
* Releases resources associated with this MediaPlayer object.
*/
@Override
public void release() {
//stop();
mCurrentMediaPlayer.release();
if (mNextMediaPlayer != null) {
mNextMediaPlayer.release();
}
}
/**
* Pauses playback. Call start() to resume.
*/
@Override
public boolean pause() {
Log.d("Exceptions","Here pause please");
try {
mCurrentMediaPlayer.release();
return true;
} catch (IllegalStateException e) {
return false;
}
}
/**
* Checks whether the MultiPlayer is playing.
*/
@Override
public boolean isPlaying() {
return mIsInitialized && mCurrentMediaPlayer.getPlayWhenReady();
}
/**
* Gets the duration of the file.
*
* @return The duration in milliseconds
*/
@Override
public int duration() {
if (!mIsInitialized) {
return -1;
}
try {
long l = mCurrentMediaPlayer.getDuration();
return (int) l;
} catch (IllegalStateException e) {
return -1;
}
}
/**
* Gets the current playback position.
*
* @return The current position in milliseconds
*/
@Override
public int position() {
if (!mIsInitialized) {
return -1;
}
try {
long l = mCurrentMediaPlayer.getCurrentPosition();
return (int) l;
} catch (IllegalStateException e) {
return -1;
}
}
/**
* Gets the current playback position.
*
* @param whereto The offset in milliseconds from the start to seek to
* @return The offset in milliseconds from the start to seek to
*/
@Override
public int seek(final int whereto) {
try {
mCurrentMediaPlayer.seekTo(whereto);
return whereto;
} catch (IllegalStateException e) {
return -1;
}
}
@Override
public boolean setVolume(final float vol) {
try {
mCurrentMediaPlayer.setVolume(vol);
return true;
} catch (IllegalStateException e) {
return false;
}
}
/**
* Sets the audio session ID.
*
* @param sessionId The audio session ID
*/
@Override
public boolean setAudioSessionId(final int sessionId) {
try {
//mCurrentMediaPlayer.setA(sessionId);
return true;
} catch (@NonNull IllegalArgumentException | IllegalStateException e) {
return false;
}
}
/**
* Returns the audio session ID.
*
* @return The current audio session ID.
*/
@Override
public int getAudioSessionId() {
return mCurrentMediaPlayer.getAudioSessionId();
}
/**
* {@inheritDoc}
*/
/*
@Override
public boolean onError(final SimpleExoPlayer mp, final int what, final int extra) {
mIsInitialized = false;
mCurrentMediaPlayer.release();
mCurrentMediaPlayer = new MediaPlayer();
mCurrentMediaPlayer.setWakeMode(context, PowerManager.PARTIAL_WAKE_LOCK);
if (context != null) {
Toast.makeText(context, context.getResources().getString(R.string.unplayable_file), Toast.LENGTH_SHORT).show();
}
return false;
}
/**
* {@inheritDoc}
*/
/*
@Override
public void onCompletion(final MediaPlayer mp) {
if (mp == mCurrentMediaPlayer && mNextMediaPlayer != null) {
mIsInitialized = false;
mCurrentMediaPlayer.release();
mCurrentMediaPlayer = mNextMediaPlayer;
mIsInitialized = true;
mNextMediaPlayer = null;
if (callbacks != null)
callbacks.onTrackWentToNext();
} else {
if (callbacks != null)
callbacks.onTrackEnded();
}
}
*/
}