我在Andriod开发了Shoutcastinternet Radio Streaming（流网址：http://123.176.41.8:8256），我能够成功播放和播放。
但问题是：当我执行我的应用程序时，我能够连续播放和播放一些扩展（20分钟，半小时等...），
之后流被停止（我无法播放流），任何人都可以帮忙吗？
我在Stream get Stopped后记录了错误。
The Error is:
D/dalvikvm(1238): GC_FOR_MALLOC freed 51742 objects / 1928072 bytes in 80ms(I'm repeating this statement in the log file while running my application on real Device)
更新
的例外：
04-27 18:31:05.753: V/MediaPlayer(26201): start
04-27 18:31:05.753: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.753: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.753: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.753: E/MediaPlayer(26201): callback application
04-27 18:31:05.753: E/MediaPlayer(26201): back from callback
04-27 18:31:05.753: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.753: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.757: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.757: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.757: V/MediaPlayer(26201): reset
04-27 18:31:05.757: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.757: V/MediaPlayer(26201): start
04-27 18:31:05.757: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.757: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.757: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.757: E/MediaPlayer(26201): callback application
04-27 18:31:05.757: E/MediaPlayer(26201): back from callback
04-27 18:31:05.757: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.757: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.757: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.757: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.757: V/MediaPlayer(26201): reset
04-27 18:31:05.757: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.757: V/MediaPlayer(26201): start
04-27 18:31:05.757: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.757: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.757: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.757: E/MediaPlayer(26201): callback application
04-27 18:31:05.757: E/MediaPlayer(26201): back from callback
04-27 18:31:05.761: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.761: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.761: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.761: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.761: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.761: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.761: V/MediaPlayer(26201): reset
04-27 18:31:05.761: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.761: V/MediaPlayer(26201): start
04-27 18:31:05.761: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.761: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.761: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.761: E/MediaPlayer(26201): callback application
04-27 18:31:05.761: E/MediaPlayer(26201): back from callback
04-27 18:31:05.765: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.765: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.765: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.765: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.765: V/MediaPlayer(26201): reset
04-27 18:31:05.765: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.765: V/MediaPlayer(26201): start
04-27 18:31:05.765: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.765: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.765: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.765: E/MediaPlayer(26201): callback application
04-27 18:31:05.765: E/MediaPlayer(26201): back from callback
04-27 18:31:05.765: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.765: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.769: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.769: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.769: V/MediaPlayer(26201): reset
04-27 18:31:05.769: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.769: V/MediaPlayer(26201): start
04-27 18:31:05.769: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.769: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.769: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.769: E/MediaPlayer(26201): callback application
04-27 18:31:05.769: E/MediaPlayer(26201): back from callback
04-27 18:31:05.769: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.769: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.769: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.769: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.769: V/MediaPlayer(26201): reset
04-27 18:31:05.773: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.773: V/MediaPlayer(26201): start
04-27 18:31:05.773: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.773: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
04-27 18:31:05.773: E/MediaPlayer(26201): error (-38, 0)
04-27 18:31:05.773: E/MediaPlayer(26201): callback application
04-27 18:31:05.773: E/MediaPlayer(26201): back from callback
04-27 18:31:05.773: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.773: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.773: E/setupplayer(26201): java.io.FileNotFoundException: /data/data/com.torilt/cache/downloadingMediaFile591 (No such file or directory)
04-27 18:31:05.773: E/setupplayer(26201): Can't find file. Android must have deleted it on a clean up
04-27 18:31:05.773: E/MediaPlayer(26201): Error (-38,0)
04-27 18:31:05.773: V/MediaPlayer-JNI(26201): reset
04-27 18:31:05.773: V/MediaPlayer(26201): reset
04-27 18:31:05.776: V/MediaPlayer-JNI(26201): start
04-27 18:31:05.776: V/MediaPlayer(26201): start
04-27 18:31:05.776: E/MediaPlayer(26201): start called in state 1
04-27 18:31:05.776: E/MediaPlayer(26201): message received msg=100, ext1=-38, ext2=0
源代码：
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.Calendar;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Handler;
import android.os.IBinder;
import android.os.Process;
import android.util.Log;
/**
* MediaPlayer does not yet support "Shoutcast"-like streaming from external
* URLs so this class provides a pseudo-streaming function by downloading the
* content incrementally & playing as soon as we get enough audio in our
* temporary storage.
*/
public class StreamingMediaPlayer extends Service {
final static public String AUDIO_MPEG = "audio/mpeg";
final static public String BITERATE_HEADER = "icy-br";
public int INTIAL_KB_BUFFER ;
private Handler handler;
//= 96*10/8
final public int BIT = 8;
final public int SECONDS = 60;
int bitrate = 56;
public File downloadingMediaFile;
final public String DOWNFILE = "downloadingMediaFile";
public Context context;
public int counter;
public int playedcounter;
public int preparecounter;
public MediaPlayer mp1;
public MediaPlayer mp2;
public boolean mp1prepared;
public boolean mp2prepared;
public boolean mp1preparing;
public boolean mp2preparing;
public boolean downloadingformp1;
public boolean downloadingformp2;
public boolean prepareState;
public String SONGURL = "";
// playing is "true" for mp1 and "false" for mp2
public boolean mp1playing;
public boolean started;
public boolean processHasStarted;
public boolean processHasPaused;
public boolean regularStream;
public BufferedInputStream stream;
public URL url;
public URLConnection urlConn;
public String station;
public String audiourl;
public Intent startingIntent = null;
public boolean stopping;
Thread preparringthread;
boolean waitingForPlayer;
// Setup all the variables
private void setupVars() {
counter = 0;
playedcounter = 0;
preparecounter = 0;
mp1 = new MediaPlayer();
mp2 = new MediaPlayer();
mp1prepared = false;
mp2prepared = false;
mp1preparing = false;
mp2preparing = false;
downloadingformp1 = false;
downloadingformp2 = false;
prepareState = true;
mp1playing = false;
started = false;
processHasStarted = false;
processHasPaused = true;
regularStream = false;
stream = null;
url = null;
urlConn = null;
station = null;
audiourl = null;
stopping = false;
preparringthread = null;
waitingForPlayer = false;
}
// This object will allow other processes to interact with our service
private final IStreamingMediaPlayer.Stub ourBinder = new IStreamingMediaPlayer.Stub() {
// String TAG = "IStreamingMediaPlayer.Stub";
public String getStation() {
// Log.d(TAG, "getStation");
return station;
}
public String getUrl() {
// Log.d(TAG, "getUrl");
return audiourl;
}
public boolean playing() {
// Log.d(TAG, "playing?");
return isPlaying();
}
public boolean pause() {
// Log.d(TAG, "playing?");
return isPause();
}
public void startAudio() {
// Log.d(TAG, "startAudio");
Runnable r = new Runnable() {
public void run() {
onStart(startingIntent, 0);
}
};
new Thread(r).start();
}
public void stopAudio() {
// Log.d(TAG, "stopAudio");
stop();
}
};
@Override
public void onCreate() {
super.onCreate();
context = this;
}
@Override
public void onStart(Intent intent, int startId) throws NullPointerException {
super.onStart(intent, startId);
// final String TAG = "StreamingMediaPlayer - onStart";
context = this;
setupVars();
if (intent.hasExtra("audiourl")) {
raiseThreadPriority();
processHasStarted = true;
processHasPaused = false;
audiourl = intent.getStringExtra("audiourl");
station = intent.getStringExtra("station");
downloadingMediaFile = new File(context.getCacheDir(), DOWNFILE+ counter);
downloadingMediaFile.deleteOnExit();
Runnable r = new Runnable() {
public void run() {
try {
startStreaming(audiourl);
} catch (IOException e) {
// Log.d(TAG, e.toString());
}
}
};
Thread t = new Thread(r);
t.start();
}
}
@Override
public void onDestroy() {
super.onDestroy();
mp1.stop();
mp2.stop();
}
@Override
public IBinder onBind(Intent intent) {
startingIntent = intent;
context = this;
return ourBinder;
}
@Override
public boolean onUnbind(Intent intent) {
super.onUnbind(intent);
stopSelf();
return true;
}
/**
* Progressivly download the media to a temporary location and update the
* MediaPlayer as new content becomes available.
*/
public void startStreaming(final String mediaUrl) throws IOException {
try {
url = new URL(mediaUrl);
urlConn = (HttpURLConnection) url.openConnection();
urlConn.setReadTimeout(1000 * 20);
urlConn.setConnectTimeout(1000 * 5);
//The getContentType method is used by the getContent method to determine the type of the remote object; subclasses may find it convenient to override the getContentType method.
String ctype = urlConn.getContentType();
if (ctype == null) {
ctype = "";
} else {
ctype = ctype.toLowerCase();
}
if (ctype.contains(AUDIO_MPEG) || ctype.equals("")) {
String temp = urlConn.getHeaderField(BITERATE_HEADER);
if (temp != null) {
bitrate = new Integer(temp).intValue();
}
} else {
stopSelf();
return;
}
}
catch(NullPointerException ne)
{
}
catch (IOException ioe) {
// Log.e(TAG, "Could not connect to " + mediaUrl);
stopSelf();
return;
}
if (!regularStream) {
INTIAL_KB_BUFFER = bitrate * SECONDS / BIT;
Runnable r = new Runnable() {
public void run() {
try {
downloadAudioIncrement(mediaUrl);
Log.i("TAG12344444", "Unable to play");
stopSelf();
return;
} catch (IOException e) {
Log.i("TAG123", "Unable to initialize the MediaPlayer for Audio Url = "+mediaUrl, e);
stopSelf();
return;
} catch (NullPointerException e) {
stopSelf();
return;
}
}
};
Thread t = new Thread(r);
t.start();
}
}
/**
* Download the url stream to a temporary location and then call the
* setDataSource for that local file
*/
public void downloadAudioIncrement(String mediaUrl) throws IOException{
int bufsizeForDownload = 8 * 1024;
int bufsizeForfile = 64 * 1024;
stream = new BufferedInputStream(urlConn.getInputStream(),bufsizeForDownload);
Log.i("bufsize",Integer.toString(urlConn.getInputStream().available()));
try{
if(stream == null || stream.available() == 0){
stopSelf();
Log.i("unable to create ","stream null");
return;
}
}catch (NullPointerException e) {
stopSelf();
Log.i("return1","return1");
return;
}
BufferedOutputStream bout = new BufferedOutputStream(new FileOutputStream(downloadingMediaFile), bufsizeForfile);
byte buf[] = new byte[bufsizeForDownload];
int totalBytesRead = 0, totalKbRead = 0, numread = 0;
do {
if (bout == null) {
counter++;
downloadingMediaFile = new File(context.getCacheDir(), DOWNFILE+ counter);
downloadingMediaFile.deleteOnExit();
bout = new BufferedOutputStream(new FileOutputStream(downloadingMediaFile), bufsizeForfile);
}
try {
numread = stream.read(buf);
} catch (IOException e) {
Log.d("Downloadingfile", "Bad read. Let's quit.");
// stop();
Log.i("return2","return2");
stopSelf();
// return;
}
catch (NullPointerException e) {
// Let's get out of here
e.printStackTrace();
break;
}
if (numread < 0) {
bout.flush();
stopSelf();
Log.i("Bad read from stream", "Bad read from stream3");
if(stream == null){
urlConn = new URL(mediaUrl).openConnection();
urlConn.setConnectTimeout(1000 * 30);
urlConn.connect();
stream = new BufferedInputStream(urlConn.getInputStream(),bufsizeForDownload);
}else{
handler.post(new Runnable() {
public void run() {
Log.i("Bad read from stream", "Bad read from xyz");
context.stopService(startingIntent);
Log.i("return3","return3");
return;
}
});
}
} else if (numread >= 1) {
bout.write(buf, 0, numread);
totalBytesRead += numread;
totalKbRead += totalBytesRead / 1000;
}
if (totalKbRead >= INTIAL_KB_BUFFER && stopping != true) {
bout.flush();
bout.close();
bout = null;
if (started == false) {
Runnable r = new Runnable() {
public void run() {
setupplayer();
}
};
Thread t = new Thread(r);
t.start();
}
totalBytesRead = 0;
totalKbRead = 0;
}
if (stopping == true) {
stream = null;
}
} while (stream != null);
}
/** oncompletelister for media player **/
class listener implements MediaPlayer.OnCompletionListener {
public void onCompletion(MediaPlayer mp) {
waitingForPlayer = false;
long timeInMilli = Calendar.getInstance().getTime().getTime();
long timeToQuit = (1000 * 30) + timeInMilli; // add 30 seconds
if (mp1playing)
{
mp1.reset();
removefile();
mp1prepared = false;
// Log.d(TAG, "mp1 is Free.");
if (downloadingformp2) {
if (mp2preparing && stopping == false) {
waitingForPlayer = true;
}
while (mp2preparing && stopping == false) {
if (timeInMilli > timeToQuit) {
stopSelf();
}
timeInMilli = Calendar.getInstance().getTime().getTime();
}
}
} else {
mp2.reset();
removefile();
mp2prepared = false;
if (downloadingformp1) {
if (mp1preparing && stopping == false) {
waitingForPlayer = true;
}
while (mp1preparing && stopping == false) {
if (timeInMilli > timeToQuit) {
stopSelf();
}
timeInMilli = Calendar.getInstance().getTime().getTime();
}
}
}
if (waitingForPlayer == true) {
// we must have been waiting
waitingForPlayer = false;
}
if (stopping == false) {
if (mp1playing) {
mp2.start();
mp1playing = false;
Runnable r = new Runnable() {
public void run() {
setupplayer();
}
};
Thread t = new Thread(r);
t.start();
} else {
mp1.start();
mp1playing = true;
Runnable r = new Runnable() {
public void run() {
setupplayer();
}
};
Thread t = new Thread(r);
t.start();
}
}
}
}
/** OnPreparedListener for media player **/
class preparelistener implements MediaPlayer.OnPreparedListener {
public void onPrepared(MediaPlayer mp) {
if (prepareState) {
prepareState = false;
mp1preparing = false;
mp1prepared = true;
if (started == false) {
started = true;
mp1.start();
mp1playing = true;
Runnable r = new Runnable() {
public void run() {
setupplayer();
}
};
Thread t = new Thread(r);
t.start();
}
} else {
prepareState = true;
mp2preparing = false;
mp2prepared = true;
}
}
};
/**
* Set Up player(s)
*/
public void setupplayer() {
final String TAG = "setupplayer";
Runnable r = new Runnable() {
public void run() {
try {
if (!mp1preparing && !mp1prepared) {
while (true) {
downloadingformp1 = true;
if (started == false)
break;
if (counter > preparecounter)
break;
}
File f = new File(context.getCacheDir(), DOWNFILE+ preparecounter);
FileInputStream ins = new FileInputStream(f);
mp1.setDataSource(ins.getFD());
mp1.setAudioStreamType(AudioManager.STREAM_MUSIC);//playing for live streaming
mp1.setOnCompletionListener(new listener());
mp1.setOnPreparedListener(new preparelistener());
if (started == false || waitingForPlayer == true){
}
mp1.prepareAsync();// .prepare();
mp1preparing = true;
downloadingformp1 = false;
preparecounter++;
} else if (!mp2preparing && !mp2prepared) {
while (true) {
downloadingformp2 = true;
if (started == false)
break;
if (counter > preparecounter)
break;
}
File f = new File(context.getCacheDir(), DOWNFILE+ preparecounter);
FileInputStream ins = new FileInputStream(f);
mp2.setDataSource(ins.getFD());
mp2.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp2.setOnCompletionListener(new listener());
mp2.setOnPreparedListener(new preparelistener());
mp2.prepareAsync();
mp2preparing = true;
downloadingformp2 = false;
preparecounter++;
// }
} else
Log.d(TAG, "No Media player is available to setup.");
return;
} catch (FileNotFoundException e) {
Log.e(TAG, e.toString());
Log.e(TAG,"Can't find file. Android must have deleted it on a clean up ");
stop();
return;
} catch (IllegalStateException e) {
Log.e(TAG, e.toString());
stop();
} catch (IOException e) {
Log.e(TAG, e.toString());
stop();
}
}
};
preparringthread = new Thread(r);
preparringthread.start();
try {
preparringthread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
private void removefile() {
File temp = new File(context.getCacheDir(), DOWNFILE + playedcounter);
temp.delete();
playedcounter++;
}
public boolean stop() {
final String TAG = "STOP";
stopping = true;
try {
if (mp1.isPlaying()){
if (!(stream == null)) {
Log.i("IN STOP", "MP1 is nill");
stopSelf();
}
mp1.stop();
}
if (mp2.isPlaying()){
Log.i("IN STOP", "MP2 is nill");
if (!(stream == null)){
stopSelf();
}
mp2.stop();
}
} catch (Exception e) {
Log.e(TAG, "error stopping players");
}
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
Log.e(TAG, "error closing open connection");
}
}
stream = null;
processHasStarted = false;
processHasPaused = true;
if (preparringthread != null) {
preparringthread.interrupt();
}
stopSelf();
return true;
}
public boolean isPlaying() {
return processHasStarted;
}
public boolean isPause() {
return processHasPaused;
}
private void raiseThreadPriority() {
Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO);
}
}
答案 0 :(得分：1)
消息
GC_FOR_MALLOC freed 51742 objects / 1928072 bytes in 80ms
这不是一个真正的错误，它只是一个标志，你继续分配内存并释放它，迫使垃圾收集器经常运行。这对性能不是很好，但不会导致您的流媒体停止。
真正的错误是文件未找到异常。
快速浏览你的代码，我相信正在发生的是你将所有流数据存储到一个文件中（不删除已播放的内容），这样文件无限增长，设备最终会耗尽空间。当它接近时，Android开始清理临时文件，最终包含您的流文件，因为它位于cache目录中。
我的建议是使用PipedInputStream和PipedOutputStream代替。你必须确保确保它足够大以缓冲流（但不是太大，因为这将在内存中）。但是你不必担心文件的增长。
如果这样做不好（因为某些原因，你无法在内存中缓冲足够的数据以便顺利播放而不会遇到网络速度波动的问题），那么你可能需要创建自己的InputStream和OutputStream类。也许使用两个文件是最简单的方法（两个文件中的缓冲区，在这两个文件之间来回移动，当读指针移动到与写指针相同的文件时，你知道你可以丢弃另一个）。
答案 1 :(得分：0)
现在还不确定它是否真实，但MediaPlayer可以播放实时流（至少是audio / mpeg和audio / aacp）。您不需要预先下载内容。只需致电
MediaPlayer.setDataSource("http://123.176.41.8:8256");