缓存音频到本地
private MediaPlayermediaPlayer =new MediaPlayer();
private Stringpath; //网络音频
private String mp3String; //本地路径
private SharedPreferencesUtilspreferencesUtils;
private long videoTotalSize =0;
private StringlocalUrl;
private long videoCacheSize =0;
//再要播放的位置调用下面的逻辑
path = “网络音乐路径”;
mp3String = (String)preferencesUtils.get(Contexts.MUSIC_PATH, "");
if (!mp3String.equals(path)) {
new Thread(new Runnable() {
@Override
public void run() {
try {
mp3String =path;
preferencesUtils.put(Contexts.MUSIC_PATH, path);
prepareVideo(path);
}catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}else {
localUrl = (String)preferencesUtils.get(Contexts.MUSIC_URL, "");
try {
playMusicBySDCar(localUrl);
Log.d("PATH", localUrl);
}catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 下载缓存音频
*
* @param remoteUrl
* @throws IOException
*/
private void prepareVideo(String remoteUrl)throws IOException {
URL url =new URL(remoteUrl);
HttpURLConnection httpConnection = (HttpURLConnection) url
.openConnection();
httpConnection.setConnectTimeout(3000);
httpConnection.setRequestProperty("RANGE", "bytes=" +0 +"-");
InputStream is = httpConnection.getInputStream();
videoTotalSize = httpConnection.getContentLength();
if (videoTotalSize == -1) {
return;
}
String name = remoteUrl.substring(remoteUrl.lastIndexOf("/") +1);
localUrl = Environment.getExternalStorageDirectory().getAbsolutePath()
+"/VideoCache/" + File.separator + name;
//保存路径
preferencesUtils.put(Contexts.MUSIC_URL, localUrl);
File cacheFile =new File(localUrl);
if (!cacheFile.exists()) {
cacheFile.getParentFile().mkdirs();
cacheFile.createNewFile();
}
RandomAccessFile raf =new RandomAccessFile(cacheFile, "rws");
raf.setLength(videoTotalSize);
raf.seek(0);
byte buf[] =new byte[10 *1024];
int size =0;
videoCacheSize =0;
int buffercnt =0;
while ((size = is.read(buf)) != -1) {
try {
raf.write(buf, 0, size);
videoCacheSize += size;
}catch (Exception e) {
e.printStackTrace();
}
}
is.close();
raf.close();
playMusicBySDCar(localUrl);
}
private void playMusicBySDCar(String localUrl)throws IOException {
mediaPlayer.setDataSource(localUrl);
mediaPlayer.prepare();
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.reset();
}
});
}
