问题描述
- ios音频后台播放，怎么实现（在线）
- ios音频后台播放，怎么实现，在线播放的
最好有直接执行的代码
解决方案
解决方案二：
使用服务，即Service就可以满足你的要求。
给你我以前自己写的示例：
import java.util.List;import android.annotation.SuppressLint;import android.app.Service;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.media.MediaPlayer.OnPreparedListener;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.util.Log;import com.hs.leozheng.phonelinkhs.MusicListActivity;import com.hs.leozheng.phonelinkhs.AudioMediaInfo;import com.hs.leozheng.phonelinkhs.AppConstant;/*** * leo * 音乐播放服务 */@SuppressLint(""NewApi"")public class PlayerService extends Service { private MediaPlayer mediaPlayer; // 媒体播放器对象 private String path; // 音乐文件路径 private int msg; private boolean isPause; // 暂停状态 private int current = 0; // 记录当前正在播放的音乐 private List<AudioMediaInfo> mp3Infos; // 存放 AudioMediaInfo 对象的集合 private int status = 3; // 播放状态，默认为顺序播放 private MyReceiver myReceiver; // 自定义广播接收器 private int currentTime; // 当前播放进度 private int duration; // 播放长度 /** * handler 用来接收消息，来发送广播更新播放时间 */ @SuppressLint(""HandlerLeak"") private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { if (msg.what == 1) { if(mediaPlayer != null) { currentTime = mediaPlayer.getCurrentPosition(); // 获取当前音乐播放的位置 duration = mediaPlayer.getDuration(); Intent intent = new Intent(); intent.setAction(AppConstant.AUDIO_SEND_CURRENT); intent.putExtra(""currentTime"" currentTime); intent.putExtra(""totalTime"" duration); sendBroadcast(intent); // 给 PlayerActivity 发送广播 handler.sendEmptyMessageDelayed(1 100); } } }; }; @Override public void onCreate() { super.onCreate(); Log.i(""service""service created""); mediaPlayer = new MediaPlayer(); mp3Infos = MusicListActivity.getMp3Infos(PlayerService.this); myReceiver = new MyReceiver(); IntentFilter filter = new IntentFilter(); filter.addAction(AppConstant.AUDIO_CTRL_ACTION); registerReceiver(myReceiver filter); /** * 设置音乐播放完成时的监听器 */ mediaPlayer.setOnCompletionListener(new OnCompletionListener() { @Override public void onCompletion(MediaPlayer mp) { if (1 == status) { // 单曲循环 mediaPlayer.start(); } else if (2 == status) { // 全部循环 current++; if(current > mp3Infos.size() - 1) { // 变为第一首的位置继续播放 current = 0; } path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" mp3Infos.size()); // 发送广播，将被 Activity 组件中的 BroadcastReceiver 接收到 sendBroadcast(sendIntent); play(0); } else if (3 == status) { // 顺序播放 current++; // 下一首位置 if (current <= mp3Infos.size() - 1) { path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" mp3Infos.size()); sendBroadcast(sendIntent); play(0); }else { mediaPlayer.seekTo(0); current = 0; path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" mp3Infos.size()); sendBroadcast(sendIntent); } } else if (4 == status) { // 随机播放 current = getRandomIndex(mp3Infos.size() - 1); path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" mp3Infos.size()); sendBroadcast(sendIntent); play(0); } } }); } /** * 获取随机位置 */ protected int getRandomIndex(int end) { int index = (int) (Math.random() * end); return index; } @Override public IBinder onBind(Intent arg0) { return null; } @SuppressWarnings(""deprecation"") @Override public void onStart(Intent intent int startId) { path = intent.getStringExtra(""url""); // 歌曲路径 current = intent.getIntExtra(""listPosition"" -1); // 当前播放歌曲的在 mp3Infos 的位置 Log.i(""Play Service""onStart current is: "" + Integer.toString(current)); msg = intent.getIntExtra(""MSG"" 0); // 播放信息 AppConstant.PlayerMsg msgEnum = AppConstant.PlayerMsg.values()[msg]; if (AppConstant.PlayerMsg.PLAY_MSG == msgEnum) { // 直接播放音乐 Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" mp3Infos.size()); // 发送广播，将被 Activity 组件中的 BroadcastReceiver 接收到 sendBroadcast(sendIntent); play(0); } else if (AppConstant.PlayerMsg.PAUSE_MSG == msgEnum) { // 暂停 pause(); } else if (AppConstant.PlayerMsg.STOP_MSG == msgEnum) { // 停止 stop(); } else if (AppConstant.PlayerMsg.CONTINUE_MSG == msgEnum) { // 继续播放 resume(); } else if (AppConstant.PlayerMsg.PRIVIOUS_MSG == msgEnum) { // 上一首 previous(); } else if (AppConstant.PlayerMsg.NEXT_MSG == msgEnum) { // 下一首 next(); } else if (AppConstant.PlayerMsg.PROGRESS_CHANGE == msgEnum) { // 进度更新 currentTime = intent.getIntExtra(""progress"" -1); play(currentTime); } else if (AppConstant.PlayerMsg.PLAYING_MSG == msgEnum) { handler.sendEmptyMessage(1); } super.onStart(intent startId); } /** * 播放音乐 * * @param position */ private void play(int currentTime) { try { mediaPlayer.reset(); // 把各项参数恢复到初始状态 mediaPlayer.setDataSource(path); Intent commonCtrl_intent = new Intent(); commonCtrl_intent.setAction(AppConstant.COMMON_UI_MSG); commonCtrl_intent.putExtra(""ACTION""UIPlayingFilename""); // 对 URL 进行处理: 保显示文件名不显示目录 int find = path.lastIndexOf('/') + 1; String strFilename = null; if(-1 != find) { strFilename = path.substring(find); commonCtrl_intent.putExtra(""filename"" strFilename); sendBroadcast(commonCtrl_intent); } mediaPlayer.prepare(); // 进行缓冲 mediaPlayer.setOnPreparedListener(new PreparedListener(currentTime)); // 注册一个监听器 handler.sendEmptyMessage(1); } catch (Exception e) { e.printStackTrace(); } } /** * 暂停音乐 */ private void pause() { if (mediaPlayer != null && mediaPlayer.isPlaying()) { mediaPlayer.pause(); isPause = true; Intent commonCtrl_intent = new Intent(); commonCtrl_intent.setAction(AppConstant.COMMON_UI_MSG); commonCtrl_intent.putExtra(""ACTION""UIPlayingStatus""); commonCtrl_intent.putExtra(""playingStatus"" 2); sendBroadcast(commonCtrl_intent); } } private void resume() { if (isPause) { mediaPlayer.start(); isPause = false; Intent commonCtrl_intent = new Intent(); commonCtrl_intent.setAction(AppConstant.COMMON_UI_MSG); commonCtrl_intent.putExtra(""ACTION""UIPlayingStatus""); commonCtrl_intent.putExtra(""playingStatus"" 1); sendBroadcast(commonCtrl_intent); } } /** * 上一首 */ private void previous() { int size = mp3Infos.size(); if((current - 1) >= 0) { current--; } else { current = size - 1; } path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" size); // 发送广播，将被 Activity 组件中的 BroadcastReceiver 接收到 sendBroadcast(sendIntent); play(0); } /** * 下一首 */ private void next() { int size = mp3Infos.size(); if((current + 1) <= (size - 1)) { current++; } else { current = 0; } path = mp3Infos.get(current).GetUrl(); Intent sendIntent = new Intent(AppConstant.AUDIO_SEND_UPDATE); sendIntent.putExtra(""current"" current); sendIntent.putExtra(""url"" path); sendIntent.putExtra(""total"" size); // 发送广播，将被 Activity 组件中的 BroadcastReceiver 接收到 sendBroadcast(sendIntent); play(0); } /** * 停止音乐 */ private void stop() { if (mediaPlayer != null) { mediaPlayer.stop(); try { mediaPlayer.prepare(); // 在调用 stop 后如果需要再次通过 start 进行播放需要之前调用 prepare 函数 } catch (Exception e) { e.printStackTrace(); } Intent commonCtrl_intent = new Intent(); commonCtrl_intent.setAction(AppConstant.COMMON_UI_MSG); commonCtrl_intent.putExtra(""ACTION""UIPlayingStatus""); commonCtrl_intent.putExtra(""playingStatus"" 3); sendBroadcast(commonCtrl_intent); } } @Override public void onDestroy() { if (mediaPlayer != null) { mediaPlayer.stop(); mediaPlayer.release(); mediaPlayer = null; } } /** * * 实现一个 OnPrepareLister 接口当音乐准备好的时候开始播放 * */ private final class PreparedListener implements OnPreparedListener { private int currentTime; public PreparedListener(int currentTime) { this.currentTime = currentTime; } @Override public void onPrepared(MediaPlayer mp) { mediaPlayer.start(); // 开始播放 if (currentTime > 0) { // 如果音乐不是从头播放 mediaPlayer.seekTo(currentTime); } Intent intent = new Intent(); intent.setAction(AppConstant.AUDIO_SEND_DURATION); duration = mediaPlayer.getDuration(); intent.putExtra(""duration"" duration); // 通过 Intent 来传递歌曲的总长度 sendBroadcast(intent); } } public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context Intent intent) { AppConstant.PlayerMsg msgEnum = AppConstant.PlayerMsg.APP_CONSTANT_MAX; String action = intent.getAction(); int msg = intent.getIntExtra(""MSG"" -1); int mode = intent.getIntExtra(""mode"" 3); if(msg > 0) { msgEnum = AppConstant.PlayerMsg.values()[msg]; } if(action.equals(AppConstant.AUDIO_CTRL_ACTION)) { Log.v(""Play Service""Control: "" + Integer.toString(msg)); if(msgEnum == AppConstant.PlayerMsg.PRIVIOUS_MSG) { Log.v(""Play Service""Control.Prev""); previous(); } else if(msgEnum == AppConstant.PlayerMsg.NEXT_MSG) { Log.v(""Play Service""Control.Next""); next(); } else if(msgEnum == AppConstant.PlayerMsg.PLAY_MODE) { Log.v(""Play Service""Control.Mode: "" + Integer.toString(mode)); } else if(msgEnum == AppConstant.PlayerMsg.CONTINUE_MSG) { Log.v(""Play Service""Control.Continue""); resume(); } else if(msgEnum == AppConstant.PlayerMsg.PAUSE_MSG) { Log.v(""Play Service""Control.Pause""); pause(); } } } }}调用 方式：
Intent intent = new Intent();intent.putExtra(""url"" audioMediaInfo.GetUrl()); // 参数可要、可不要intent.putExtra(""listPosition"" positionSelected/*getPlayingIndex(audioMediaInfo.GetUrl())*/);intent.putExtra(""MSG"" AppConstant.PlayerMsg.PLAY_MSG.ordinal());intent.setClass(MusicListActivity.this PlayerService.class);startService(intent); 解决方案三：
iOS 后台运行，百度的话，会有好多的博客，都是可以实现的
解决方案四：
http://blog.csdn.net/capacity_bo/article/details/44943005
解决方案五：
在AppDelegate中添加:
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
并且在info.plist中添加 Localization native development region
这样就实现了
解决方案六：
在AppDelegate中添加:
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
并且在info.plist中添加 Localization native development region
这样就实现了
解决方案七：
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时间： 2024-08-27 03:56:35