我正在開發一個簡單的音樂播放器。所以有一個由線程更新的SeekBar。但是當我第二次選擇一首歌時,它會崩潰(java.lang.IllegalThreadStateException:線程已經啓動)。java.lang.IllegalThreadStateException:線程已經啓動
這是我的代碼:
updateSeekBar = new Thread(){
@Override
public void run(){
int totalDuration = mp.getDuration();
int currentPosition = 0;
while(mp != null && currentPosition<totalDuration){
try{
sleep(500);
currentPosition = mp.getCurrentPosition();
sb.setProgress(currentPosition);
}catch (InterruptedException e){
Log.i(TAG, "Thread ERROR");
e.printStackTrace();
}
}
}
};
...
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//Log.i(TAG, "Thread State: " + updateSeekBar.getState().toString());
Uri u = Uri.parse(songList.get(position).getPath().toString());
if(mp!=null){ mp.stop(); mp.reset(); mp.release(); }
mp = MediaPlayer.create(getApplicationContext(), u);
mp.start();
sb.setMax(mp.getDuration());
updateSeekBar.start();
sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser){
}
@Override
public void onStartTrackingTouch(SeekBar seekBar){
}
@Override
public void onStopTrackingTouch(SeekBar seekBar){
mp.seekTo(seekBar.getProgress());
}
});
我怎麼能避免撞車?
logcat的:錯誤:(118,23)錯誤:無法找到符號方法removeAllCallbacks(MyUpdater) – xRobot
它是'removeCallbacks'。我編輯我的答案 – Blackbelt
錯誤:(9,8)錯誤:MyUpdater不是抽象的,並且不重寫抽象方法run()在Runnable中 – xRobot