我的应用从数据库加载两个音频文件并将它们存储在一个数组中。用户可以通过从单选按钮组中选择一个来播放其中任何一个。两者都是mp3。一个正在播放，它已经过去了，总持续时间正确显示。但是相同的功能显示其他的00:00总持续时间。在这种情况下，搜索栏也会将其进度更新为100％，但经过的时间正确显示且音频播放正常。有人请告诉我这是什么问题？为什么会发生这种情况..我该如何解决？
audio_urdu的时间很好..错误与audio_eng有关。
private void updateView(int i) throws JSONException
{
idx=0;
_imgBtnPlay.setClickable(false);
_imgBtnStop.setClickable(false);
JSONObject jObject=null;
jObject=Jarray.getJSONObject(i);
audioUrl_eng=jObject.getString("audio_eng");
audioUrl_urdu=jObject.getString("audio_urdu");
lbl_tDuration.setText("00:00");
lbl_cDuration.setText("00:00");
lbl_loading.setText("Loading audio files...");
loadAudio(audioUrl_eng);
}
// Loading audio files from URL
private void loadAudio(String url)
{
// TODO Auto-generated method stub
mMediaPlayer=new MediaPlayer();
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
try
{
mMediaPlayer.setDataSource(url);
mMediaPlayer.prepareAsync();
}
catch(IOException e)
{
e.printStackTrace();
}
catch (IllegalArgumentException e)
{
e.printStackTrace();
}
catch (IllegalStateException e)
{
e.printStackTrace();
}
mMediaPlayer.setOnPreparedListener(this);
}
// Notify when audio is ready to be played
@Override
public void onPrepared(MediaPlayer mp)
{
// TODO Auto-generated method stub
audioPlayerList[idx]=mp;
idx++;
if (idx == 1)
{
audioPlayer = mp;
lbl_tDuration.setText(mSecToTimer(mp.getDuration()));
lbl_cDuration.setText(mSecToTimer(mp.getCurrentPosition()));
updateSeekBar();
loadAudio(audioUrl_eng);
}
if (idx == 2)
{
// Enabling the media control buttons
_imgBtnPlay.setClickable(true);
_imgBtnStop.setClickable(true);
rdGrp.setClickable(true);
lbl_loading.setText("");
idx = 0;
}
}
public void onClick(View v)
{
switch(v.getId())
{
// calling search function
case R.id.imgBtnSearch:
onSearchRequested();
break;
// when play/pause button is tapped
case R.id.imgBtnPlay:
if (audioPlayer.isPlaying())
{
audioPlayer.pause();
_imgBtnPlay.setImageResource(R.drawable.ic_action_play);
}
else if (audioPlayer!=null)
{
audioPlayer.start();
_imgBtnPlay.setImageResource(R.drawable.ic_action_pause);
durationHandler.postDelayed(updateSeekBarTime, 100);
}
break;
// when stop button is tapped
case R.id.imgBtnStop:
audioPlayer.pause();
_imgBtnPlay.setImageResource(R.drawable.ic_action_play);
resetProgress();
break;
default:
break;
}
// Updating the seek bar's time after every 100 milliseconds
public void updateSeekBar()
{
durationHandler.postDelayed(updateSeekBarTime, 100);
}
// Updating the progress of seek bar
private Runnable updateSeekBarTime = new Runnable()
{
public void run()
{
long tDuration = audioPlayer.getDuration();
long cDuration = audioPlayer.getCurrentPosition();
lbl_tDuration.setText(mSecToTimer(tDuration));
lbl_cDuration.setText(mSecToTimer(cDuration));
int progress = (int) getProgressPercentage(cDuration, tDuration);
_seekbar.setProgress(progress);
durationHandler.postDelayed(this, 100);
}
};
// Converting milliseconds into min:sec format
public String mSecToTimer(long ms)
{
String finalTimerString = "";
String secString = "";
String minString = "";
// Convert total duration into minutes and seconds
int min = (int)(ms % (1000*60*60)) / (1000*60);
int sec = (int) ((ms % (1000*60*60)) % (1000*60) / 1000);
// Prepending 0 to seconds if it is one digit
if(sec < 10)
secString = "0" + sec;
else
secString = "" + sec;
// Prepending 0 to minutes if it is one digit
if(min < 10)
minString = "0" + min;
else
minString = "" + min;
finalTimerString = minString + ":" + secString;
return finalTimerString;
}
// calculating the percentage progress of seek bar
public int getProgressPercentage(long cDuration, long tDuration)
{
Double percentage = (double) 0;
long cSeconds = (int) (cDuration / 1000);
long tSeconds = (int) (tDuration / 1000);
percentage =(((double)cSeconds)/tSeconds)*100;
return percentage.intValue();
}
// Converting progress of seek bar into time duration in milliseconds
public int progressToTimer(int progress, int tDuration)
{
int cDuration = 0;
tDuration = (int) (tDuration / 1000);
cDuration = (int) ((((double)progress) / 100) * tDuration);
return cDuration * 1000;
}
// Reseting the progress of seek bar when stop button is tapped
public void resetProgress()
{
audioPlayer.seekTo(0);
lbl_cDuration.setText(mSecToTimer(0));
_seekbar.setProgress(0);
}
我有一个英文音频和一个乌尔都语。两者都在数组audioPlayerList中。用户可以使用单选按钮选择不同的语言。并且idx是变量，它告诉要播放哪个音频文件。 audio_eng位于索引0（idx = 0）上，audio_urdu位于索引1（idx = 1）上。音频选为audioPlayer = audioPlayerList[idx]
代码是：
rdGrp.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
@Override
public void onCheckedChanged(RadioGroup group, int checkedId)
{
// Find which radio button is selected
if (audioPlayer!=null)
{
if(audioPlayer.isPlaying())
audioPlayer.pause();
_imgBtnPlay.setImageResource(R.drawable.ic_action_play);
resetProgress();
if (checkedId == R.id.rdEng)
audioPlayer = audioPlayerList[0];
else if (checkedId == R.id.rdUrdu)
audioPlayer = audioPlayerList[1];
}
}
});
答案 0 :(得分：0)
文件'audio_eng'的持续时间可能不到1秒。在计算百分比时，您将毫秒转换为秒，从而导致0总长度。这就是为什么你从一开始就将进度条设置为100％（实际上，在这种情况下可能会抛出异常 - 你检查过了吗？）。
计算时percentage尝试不将xDuration转换为xSeconds，但会在方法getProgressPercentage中自行划分持续时间。
我找不到你得到这样结果的其他原因