[英]Playing music from Parse.com android
所以我实现了像音乐播放列表应用一样的功能,我的音频以mp3格式上传到Parse.com,我想检索这些音频..
final Button btn = (Button) v.findViewById(R.id.button);
final ParseFile fileObject = object.getParseFile("music");
if (fileObject != null) {
fileObject.getDataInBackground(new GetDataCallback() {
@Override
public void done(byte[] bytes, com.parse.ParseException e) {
final String audioFileURL = fileObject.getUrl();
mediaPlayer = new MediaPlayer();
mediaPlayer.reset();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
try {
mediaPlayer.setDataSource(audioFileURL);
mediaPlayer.prepare();
mediaPlayer.start();
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
}//end catch
catch (IOException e1) {
e1.printStackTrace();
}
}//end on click
}//end listener
);
}//end done
});//end get data
}//end if
这是我从Parse.com检索音乐的方式,但是这特别耗时,以至于我有一个音频列表..我想要一种在后台下载音频组的方法..因此,当我单击按钮时,音乐播放如此之快..任何帮助将不胜感激。
我现在没有时间去理解为什么您的代码不起作用,但是您可以将我的示例应用程序放在github(刚刚提交)上,您应该解决问题...如果没有,请告诉我。 请注意README.md
https://github.com/fullwipe/ParseAudioFileExample
希望能帮助到你...
编辑
这是我的存储库的必要部分。
记录并保存:
String outputFile = Environment.getExternalStorageDirectory().
getAbsolutePath() + "/rumor.mp3";
myRecorder = new MediaRecorder();
myRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
myRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
myRecorder.setAudioEncoder(MediaRecorder.OutputFormat.AMR_NB);
myRecorder.setOutputFile(outputFile);
然后,开始录制...
try {
myRecorder.prepare();
myRecorder.start();
} catch (IllegalStateException e) {
// start:it is called before prepare()
// prepare: it is called after start() or before setOutputFormat()
e.printStackTrace();
} catch (IOException e) {
// prepare() fails
e.printStackTrace();
}
停止记录时,请按以下方式将其保存在Parse.com上:
FileInputStream fileInputStream = null;
File fileObj = new File(outputFile);
byte[] data = new byte[(int) fileObj.length()];
try {
//convert file into array of bytes
fileInputStream = new FileInputStream(fileObj);
fileInputStream.read(data);
fileInputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
ParseFile parseAudioFile = new ParseFile("audiofile.mp3", data);
parseAudioFile.saveInBackground();
ParseObject parseObject = new ParseObject("AudioFileClass");
parseObject.put("audiofile", parseAudioFile);
parseObject.saveInBackground(new SaveCallback() {
public void done(ParseException e) {
if (e == null) {
Toast.makeText(getApplicationContext(),"Audio file saved successfully", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext(),"Error: audio file not saved", Toast.LENGTH_SHORT).show();
}
}
});
从Parse.com检索和播放非常简单,我使用了ParseQueryAdapter。 这是您获得mp3文件并播放的部分:
ParseFile descr = object.getParseFile("audiofile");
if (descr != null) {
String audioFileURL = descr.getUrl();
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try {
mediaPlayer.setDataSource(audioFileURL);
mediaPlayer.prepare();
mediaPlayer.start();
}
...
...
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