我正在播放在线流媒体播放的媒体播放器：
mMediaPlayer = new MediaPlayer();
try {
mMediaPlayer.setDataSource("http://online-radioroks.tavrmedia.ua/RadioROKS");
mMediaPlayer.prepareAsync();
mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
start();
}
});
notifyCallbackListeners(PlayerCallbackEvent.PLAYER_SONG_CHANGE);
}
catch (IllegalArgumentException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
} catch (IllegalStateException ex){
ex.printStackTrace();
}
它运行正常，但是我可以从流中获取数据，就像现在播放的歌曲和收音机名称一样吗？
从流播放数据，如现在播放的歌曲和收音机的名称？
对于该流式URL，应提供该数据，而不是相应地您可以读取数据。
对于您在问题中提到的网址，它在标题中提供数据请求Icy-MetaData和标头icy-metaint。有关这些类型的网址和标题数据的更多详细信息，请检查this链接。
现在，您如何解析标题数据？
您可以尝试以下发布的代码
public class ParsingHeaderData {
public class TrackData {
public String artist = "";
public String title = "";
}
protected URL streamUrl;
private Map<String, String> metadata;
private TrackData trackData;
public ParsingHeaderData() {
}
public TrackData getTrackDetails(URL streamUrl) {
trackData = new TrackData();
setStreamUrl(streamUrl);
String strTitle = "";
String strArtist = "";
try {
metadata = executeToFetchData();
if (metadata != null) {
String streamHeading = "";
Map<String, String> data = metadata;
if (data != null && data.containsKey("StreamTitle")) {
strArtist = data.get("StreamTitle");
streamHeading = strArtist;
}
if (!TextUtils.isEmpty(strArtist) && strArtist.contains("-")) {
strArtist = strArtist.substring(0, strArtist.indexOf("-"));
trackData.artist = strArtist.trim();
}
if (!TextUtils.isEmpty(streamHeading)) {
if (streamHeading.contains("-")) {
strTitle = streamHeading.substring(streamHeading
.indexOf("-") + 1);
trackData.title = strTitle.trim();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return trackData;
}
private URLConnection con;
private InputStream stream;
private List<String> headerList;
private Map<String, String> executeToFetchData() throws IOException {
try {
con = streamUrl.openConnection();
con.setRequestProperty("Icy-MetaData", "1");
// con.setRequestProperty("Connection", "close");
// con.setRequestProperty("Accept", null);
con.connect();
int metaDataOffset = 0;
Map<String, List<String>> headers = con.getHeaderFields();
stream = con.getInputStream();
if (headers.containsKey("icy-metaint")) {
headerList = headers.get("icy-metaint");
if (headerList != null) {
if (headerList.size() > 0) {
metaDataOffset = Integer.parseInt(headers.get(
"icy-metaint").get(0));
} else
return null;
} else
return null;
} else {
return null;
}
// In case no data was sent
if (metaDataOffset == 0) {
return null;
}
// Read metadata
int b;
int count = 0;
int metaDataLength = 4080; // 4080 is the max length
boolean inData = false;
StringBuilder metaData = new StringBuilder();
while ((b = stream.read()) != -1) {
count++;
if (count == metaDataOffset + 1) {
metaDataLength = b * 16;
}
if (count > metaDataOffset + 1
&& count < (metaDataOffset + metaDataLength)) {
inData = true;
} else {
inData = false;
}
if (inData) {
if (b != 0) {
metaData.append((char) b);
}
}
if (count > (metaDataOffset + metaDataLength)) {
break;
}
}
metadata = ParsingHeaderData.parsingMetadata(metaData.toString());
stream.close();
} catch (Exception e) {
if (e != null && e.equals(null))
Log.e("Error", e.getMessage());
} finally {
if (stream != null)
stream.close();
}
return metadata;
}
public URL getStreamUrl() {
return streamUrl;
}
public void setStreamUrl(URL streamUrl) {
this.metadata = null;
this.streamUrl = streamUrl;
}
public static Map<String, String> parsingMetadata(String metaString) {
@SuppressWarnings({ "rawtypes", "unchecked" })
Map<String, String> metadata = new HashMap();
String[] metaParts = metaString.split(";");
Pattern p = Pattern.compile("^([a-zA-Z]+)=\\'([^\\']*)\\'$");
Matcher m;
for (int i = 0; i < metaParts.length; i++) {
m = p.matcher(metaParts[i]);
if (m.find()) {
metadata.put((String) m.group(1), (String) m.group(2));
}
}
return metadata;
}
}
怎么打电话
public class Test extends AsyncTask<Void, Void, Void> {
/*
* (non-Javadoc)
*
* @see android.os.AsyncTask#doInBackground(Params[])
*/
@Override
protected Void doInBackground(Void... params) {
try {
URL url = new URL(
"http://online-radioroks.tavrmedia.ua/RadioROKS");
ParsingHeaderData streaming = new ParsingHeaderData();
TrackData trackData = streaming.getTrackDetails(url);
Log.e("Song Artist Name ", trackData.artist);
Log.e("Song Artist Title", trackData.title);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
调用执行任务
new Test().execute();
问题太旧了，这个答案可能对某人有帮助，在我的情况下，我试图从radio.co的API获取跟踪信息。
所以首先我必须添加这个类，以允许我执行HTTP请求命名为HttpHandler：
public class HttpHandler {
private static final String TAG = HttpHandler.class.getSimpleName();
public HttpHandler() {
}
public String makeServiceCall(String reqUrl) {
String response = null;
try {
URL url = new URL(reqUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
// read the response
InputStream in = new BufferedInputStream(conn.getInputStream());
response = convertStreamToString(in);
} catch (MalformedURLException e) {
Log.e(TAG, "MalformedURLException: " + e.getMessage());
} catch (ProtocolException e) {
Log.e(TAG, "ProtocolException: " + e.getMessage());
} catch (IOException e) {
Log.e(TAG, "IOException: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
return response;
}
private String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
try {
while ((line = reader.readLine()) != null) {
sb.append(line).append('\n');
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
要获取跟踪信息，我将此方法添加到我的主要活动：
private class getTrackInfo extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
//Toast.makeText(MainActivity.this,"Getting Song Info",Toast.LENGTH_LONG).show();
}
@Override
protected Void doInBackground(Void... arg0) {
HttpHandler sh = new HttpHandler();
// Making a request to url and getting response
String url = "Your URL HERE";
String jsonStr = sh.makeServiceCall(url);
//Log.e(TAG, "Response from url: " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
JSONObject current_track = jsonObj.getJSONObject("current_track");
strArtist = current_track.getString("title");
artwork_url = current_track.getString("artwork_url");
String streamHeading = strArtist;
if (!TextUtils.isEmpty(strArtist) && strArtist.contains("-")) {
strArtist = strArtist.substring(0, strArtist.indexOf("-"));
trackData.artist = strArtist.trim();
}
if (!TextUtils.isEmpty(streamHeading)) {
if (streamHeading.contains("-")) {
strTitle = streamHeading.substring(streamHeading
.indexOf("-") + 1);
trackData.title = strTitle.trim().replace("-","");
}
}
if (!TextUtils.isEmpty(artwork_url)) {
trackData.artwork_url = artwork_url;
}
} catch (final JSONException e) {
Log.e(TAG, "Json parsing error: " + e.getMessage());
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Json parsing error: " + e.getMessage(),
Toast.LENGTH_LONG).show();
}
});
}
} else {
Log.e(TAG, "Couldn't get json from server.");
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(getApplicationContext(),
"Couldn't get json from server. Check LogCat for possible errors!",
Toast.LENGTH_LONG).show();
}
});
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
//Log.e(TAG, "Artist: " + trackData.artist + "\ntitle : " + trackData.title + "\nartwork_url :" + trackData.artwork_url);
//to update my user interface with the new info
songTitle.setText(trackData.title);
albumTitle.setText(trackData.artist);
new getAlbumImageTask(albumImage).execute(trackData.artwork_url);
}
}
调用此方法：
new getTrackInfo().execute();
要加载图稿图像，请添加以下方法：
private class getAlbumImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public getAlbumImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
调用方法来加载图片图像：
new getAlbumImageTask(albumImage).execute(trackData.artwork_url);
在这个代码中有变量与我的情况相关然后忽略然后根据你的情况调整代码我希望这有助于某人