MediaPlayer.getCurrentPosition IllegalStateException错误

 1     public void run() {
 2         // TODO Auto-generated method stub
 3         while (isRun) {
 4             try {
 5                 Thread.sleep(200);
 6             } catch (InterruptedException e) {
 7                 // TODO Auto-generated catch block
 8                 e.printStackTrace();
 9             }
10 //////////////////////这段是增加判断后的代码/////////////////////
11             if (null != player) {
12                  if (!player.isPlaying()) {//如果不在播放状态，则停止更新

//播放器进度条，防止界面报错
13                  Log.d(strTag, "播放器停止播放,跳过获取位置");
14                  break;
15                  }
16 ///////////////////////////////////////////////////////////////               
17                 int position = player.getCurrentPosition();
18                 int total = player.getDuration();
19                 Intent intent = new Intent("com.leranxinsheng.progress");
20                 intent.putExtra("position", position);
21                 intent.putExtra("total", total);
22                 sendBroadcast(intent);
23             }
24             
25             if (null != player) {
26                 if (player.isPlaying()) {
27                     playing = true;
28                 } else {
29                     Log.d(strTag, "播放器停止播放,跳过第一个if");
30                     playing = false;
31                 }
32             }
33         }
34     }