由网友(相思无人诉)分享简介:我是从SD卡与搜索栏播放的歌曲。同时获得歌曲的时间,我得到的尝试调用getDuration没有有效的媒体播放器和非法状态异常。文件名和路径是否有效one.i试过很长一段时间我无法得到解决方案。而如何将搜索栏边玩song.please帮助我。我的code:按钮播放,暂停,停止;搜索栏谋;MediaPlayer的媒体...
我是从SD卡与搜索栏播放的歌曲。同时获得歌曲的时间,我得到的尝试调用getDuration没有有效的媒体播放器和非法状态异常。文件名和路径是否有效one.i试过很长一段时间我无法得到解决方案。而如何将搜索栏边玩song.please帮助我。 我的code:
按钮播放,暂停,停止;
搜索栏谋;
MediaPlayer的媒体播放器;
SurfaceView SV;
布尔IsPlaying模块= FALSE;
play.setOnClickListener(新View.OnClickListener()
{
公共无效的onClick(视图v)
{
playsong(文件名);
}
});
私人无效playsong(字符串文件名2){
尝试{
Log.e(文件名2,文件名2);
媒体播放器=新的MediaPlayer();
mediaPlayer.setDataSource(文件名);
seek.setMax(mediaPlayer.getDuration());
媒体播放器prepare()。
mediaPlayer.start();
myHandler.post(银行经营);
IsPlaying模块= TRUE;
mediaPlayer.setOnCompletionListener(本);
}
赶上(例外前){
Log.e(SD卡-ERR2:,+前);
}
}
私人处理程序将myHandler =新的处理程序();
最后的Runnable银行经营=新的Runnable()
{
公共无效的run()
{
如果(媒体播放器!= NULL)
{
如果(IsPlaying模块)
{
尝试
{
INT currentPosition = mediaPlayer.getCurrentPosition();
seek.setProgress(currentPosition);
}赶上(例外五){
e.printStackTrace();
}
sv.postDelayed(银行经营,150);
}
}
}
};
我的日志猫错误:
9月五号至17号:46:43.578:错误/文件名2(1670):/ SD卡/舞蹈Theme.mp3
九月五日至17日:46:43.594:ERROR / MediaPlayer的(1670):尝试调用getDuration没有一个有效的媒体播放器
九月五日至17日:46:43.594:ERROR / MediaPlayer的(1670):错误(-38,0)
九月五日至17日:46:43.594:ERROR / MediaPlayer的(1670):prepareAsync称为状态0
九月五日至17日:46:43.594:错误/ SD卡-ERR2:(1670):java.lang.IllegalStateException
九月五日至17日:46:43.594:ERROR / MediaPlayer的(1670):错误(-38,0)
解决方案
您可能会被要求getDuration之前,该文件是完全加载。看到,如果溶液为this问题适合你的。
i am playing song from sdcard with seek bar. while getting duration of song i get Attempt to call getDuration without a valid mediaplayer and illegal state exception. the filename and path is valid one.i tried long time i could not get solution. and how to move seek bar while playing song.please help me. my code:
Button play,pause,stop;
SeekBar seek;
MediaPlayer mediaPlayer;
SurfaceView sv;
boolean isPlaying = false;
play.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
playsong(filename);
}
});
private void playsong(String filename2) {
try{
Log.e("filename2",filename2);
mediaPlayer = new MediaPlayer();
mediaPlayer.setDataSource(filename2);
seek.setMax(mediaPlayer.getDuration());
mediaPlayer.prepare();
mediaPlayer.start();
myHandler.post(runn);
isPlaying = true;
mediaPlayer.setOnCompletionListener(this);
}
catch(Exception ex){
Log.e("sdcard-err2:",""+ex);
}
}
private Handler myHandler = new Handler();
final Runnable runn = new Runnable()
{
public void run()
{
if (mediaPlayer != null)
{
if (isPlaying )
{
try
{
int currentPosition = mediaPlayer.getCurrentPosition();
seek.setProgress(currentPosition);
} catch (Exception e) {
e.printStackTrace();
}
sv.postDelayed(runn, 150);
}
}
}
};
my log cat errors:
05-17 09:46:43.578: ERROR/filename2(1670): /sdcard/The Dance Theme.mp3
05-17 09:46:43.594: ERROR/MediaPlayer(1670): Attempt to call getDuration without a valid mediaplayer
05-17 09:46:43.594: ERROR/MediaPlayer(1670): error (-38, 0)
05-17 09:46:43.594: ERROR/MediaPlayer(1670): prepareAsync called in state 0
05-17 09:46:43.594: ERROR/sdcard-err2:(1670): java.lang.IllegalStateException
05-17 09:46:43.594: ERROR/MediaPlayer(1670): Error (-38,0)
解决方案
You might be calling getDuration before the file is fully loaded. See if the solution to this question works for you.
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