为什么我在歌曲结束时会收到非法状态异常？我在seekcontrol.setProgress（mediaPlayer.getCurrentPosition（））;收到此错误。与seekbar有什么关系，或者这是因为其他事情？
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.media3);
Intent i1 = getIntent();
kg1 = i1.getStringExtra("Kggg1");
MixName1 = i1.getStringExtra("mixname1");
MixReplace=MixName1.replace(".mp3", " ");
initViews();
}
private void initViews() {
mediaPlayer = new MediaPlayer();
audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
txtcrnt = (TextView) findViewById(R.id.txtcurnt);
txtremain = (TextView) findViewById(R.id.txtremain);
txtcrntbig = (TextView) findViewById(R.id.txtcrntbig);
txttitle=(TextView) findViewById(R.id.title);
btnpre = (ImageButton) findViewById(R.id.btnpre);
btnnext = (ImageButton) findViewById(R.id.btnnext);
btnplay = (ImageButton) findViewById(R.id.btnplay);
btnrepeat=(ImageButton) findViewById(R.id.btnrepeat);
btnback = (Button) findViewById(R.id.btnlout);
btnplayer = (Button) findViewById(R.id.btnedit);
btnback.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
((MyMixes)getParent()).goBack();
}
});
btnplayer.setClickable(true);
btnplayer.setEnabled(false);
btnplayer.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
}
});
seekcontrol=(SeekBar) findViewById(R.id.seekbarcontrol);
seekcontrol.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar seekBar) {
}
public void onStartTrackingTouch(SeekBar seekBar) {
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
if(fromUser){
mediaPlayer.seekTo(progress);
seekcontrol.setProgress(progress);
}
}
});
btnplay.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
btnClick();
}
});
btnplay.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
if (mediaPlayer != null && mediaPlayer.isPlaying()) {
if (mediaPlayer != null) {
mediaPlayer.pause();
btnplay.setImageResource(R.drawable.play);
}
} else {
if (mediaPlayer != null && mediaPlayer != null) {
mediaPlayer.start();
startPlayProgressUpdater();
btnplay.setImageResource(R.drawable.pause);
}
}
}
});
btnnext.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
}
});
btnpre.setOnClickListener(new OnClickListener() {
public void onClick(View paramView) {
}
});
seekvolume = (SeekBar) findViewById(R.id.seekbarvolume);
new Thread()
{
public void run()
{
while (isDownloading)
{
if (Data.filenames != null&& Data.filenames.size() >= (getIntent().getExtras().getInt("index") + 1) && Data.filenames.get(getIntent().getExtras().getInt("index")) != null)
{
try
{
mediaPlayer.setDataSource(Data.filenames.get(getIntent().getExtras().getInt("index")));
mediaPlayer.prepare();
mediaPlayer.start();
startPlayProgressUpdater();
mediaPlayer.setOnCompletionListener(new OnCompletionListener()
{
@Override
public void onCompletion(MediaPlayer mp)
{
mediaPlayer.stop();
mediaPlayer.release();
}
});
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
} finally {
isDownloading = false;
}
if (mediaPlayer != null)
seekcontrol.setMax(mediaPlayer.getDuration());
int maxvolume = audioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);
int curntvolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
seekvolume.setMax(maxvolume);
seekvolume.setProgress(curntvolume);
seekvolume.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener()
{
public void onStopTrackingTouch(SeekBar paramSeekBar) {
}
public void onStartTrackingTouch(SeekBar paramSeekBar) {
}
public void onProgressChanged(SeekBar paramSeekBar, int progress, boolean paramBoolean)
{
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, progress, 0);
}
});
seekcontrol.setMax(mediaPlayer.getDuration());
seekcontrol.setOnTouchListener(new OnTouchListener()
{
public boolean onTouch(View v, MotionEvent paramMotionEvent)
{
seekChange(v);
return false;
}
});
}
}
};
}.start();
}
protected void btnClick() {
i++;
i = i % 2;
startSong(i);
}
private void startSong(int i) {
if (i == 1) {
System.out.println("11111" + i);
btnplay.setBackgroundResource(R.drawable.pause);
try {
System.out.println("start try chech------");
mediaPlayer.start();
startPlayProgressUpdater();
} catch (Exception e) {
mediaPlayer.pause();
}
}
if (i == 0) {
btnplay.setBackgroundResource(R.drawable.play);
mediaPlayer.pause();
System.out.println("00000" + i);
}
}
public void startPlayProgressUpdater() {
Log.e("position", mediaPlayer.getCurrentPosition()+"");
seekcontrol.setProgress(mediaPlayer.getCurrentPosition());
if (mediaPlayer.isPlaying()) {
Runnable notification = new Runnable() {
public void run() {
startPlayProgressUpdater();
int curtimeplay = mediaPlayer.getCurrentPosition();
int curntseconds = (int) (curtimeplay / 1000) % 60;
int curntminutes = (int) ((curtimeplay / (1000 * 60)) % 60);
txtcrnt.setText(curntminutes + ":" + curntseconds);
txtcrntbig.setText(curntminutes + ":" + curntseconds);
int duratplay = mediaPlayer.getDuration();
int totaldurationseconds = (int) (duratplay / 1000) % 60;
int totaldurationminutes = (int) ((duratplay / (1000 * 60)) % 60);
int remianingtime = duratplay - curtimeplay;
int remianingtimeseconds = (int) (remianingtime / 1000) % 60;
int remianingtimeminutes = (int) ((remianingtime / (1000 * 60)) % 60);
txtremain.setText(remianingtimeminutes + ":"
+ remianingtimeseconds);
}
};
handler.postDelayed(notification, 1000);
} else {
mediaPlayer.pause();
btnplay.setBackgroundResource(R.drawable.play);
seekcontrol.setProgress(mediaPlayer.getCurrentPosition());
}
}
protected void seekChange(View v) {
if (mediaPlayer.isPlaying()) {
SeekBar sb = (SeekBar) v;
mediaPlayer.seekTo(sb.getProgress());
}
}
logcat的
07-14 21:45:31.530: E/AndroidRuntime(13870): FATAL EXCEPTION: main
07-14 21:45:31.530: E/AndroidRuntime(13870): java.lang.IllegalStateException
07-14 21:45:31.530: E/AndroidRuntime(13870): at android.media.MediaPlayer.getCurrentPosition(Native Method)
07-14 21:45:31.530: E/AndroidRuntime(13870): at com.nelitemusic.MediaPlay1.startPlayProgressUpdater(MediaPlay1.java:253)
07-14 21:45:31.530: E/AndroidRuntime(13870): at com.nelitemusic.MediaPlay1$9.run(MediaPlay1.java:259)
07-14 21:45:31.530: E/AndroidRuntime(13870): at android.os.Handler.handleCallback(Handler.java:587)
07-14 21:45:31.530: E/AndroidRuntime(13870): at android.os.Handler.dispatchMessage(Handler.java:92)
07-14 21:45:31.530: E/AndroidRuntime(13870): at android.os.Looper.loop(Looper.java:132)
07-14 21:45:31.530: E/AndroidRuntime(13870): at android.app.ActivityThread.main(ActivityThread.java:4126)
07-14 21:45:31.530: E/AndroidRuntime(13870): at java.lang.reflect.Method.invokeNative(Native Method)
07-14 21:45:31.530: E/AndroidRuntime(13870): at java.lang.reflect.Method.invoke(Method.java:491)
07-14 21:45:31.530: E/AndroidRuntime(13870): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
07-14 21:45:31.530: E/AndroidRuntime(13870): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
07-14 21:45:31.530: E/AndroidRuntime(13870): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
seekcontrol.setProgress(mediaPlayer.getCurrentPosition());
在startPlayProgressUpdater()内部调用，在inner thread内调用。由于只有UI主题可以触及SeekBar，因此您应该使用Handler发布
seekcontrol.setProgress(mediaPlayer.getCurrentPosition());
进入UI线程队列。