mp.pause（）;正在崩潰應用程序

Question

試圖將「暫停」按鈕放入播放幾個聲音片段循環的應用程序中。

當我打電話給mp.pause（）;所有地獄崩潰，我完全失去了！

這裏是我使用的方法..

protected void managerOfSound(String theText) { 
    if (mp != null) { 
     mp.reset(); 
     mp.release(); 
    } 

     if (theText.equals(campfire)) 
      mp = MediaPlayer.create(this, R.raw.campfire); 
     else if (theText.equals(calmthunder)) 
      mp = MediaPlayer.create(this, R.raw.calmthunderstorm); 
     else if (theText.equals(rainthunder)) 
      mp = MediaPlayer.create(this, R.raw.rainthunder); 
     else if (theText.equals(whalesgulls)) 
      mp = MediaPlayer.create(this, R.raw.whalesandgulls); 
     else if (theText.equals(stopplaying)) 
      mp.pause(); 

    mp.start(); 
    mp.setLooping(true); 
} 

這裏是一個logcat的（喵^ _ ^）

threadid=1: thread exiting with uncaught exception (group=0xb2f6c648) 
FATAL EXCEPTION: main 
java.lang.IllegalStateException 
at android.media.MediaPlayer.setLooping(Native Method) 
at com.tags4apps.soothingsounds.MainActivity.managerOfSound(MainActivity.java:83) 
at com.tags4apps.soothingsounds.MainActivity$1.onClick(MainActivity.java:34) 
android.view.View.performClick(View.java:4240) 
at android.view.View$PerformClick.run(View.java:17721) 
at android.os.Handler.handleCallback(Handler.java:730) 
at android.os.Handler.dispatchMessage(Handler.java:92) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:5103) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
at dalvik.system.NativeStart.main(Native Method) 

我接受任何建議，現在

編輯：什麼是downvotes，我是晚上7點我一直在尋找一種方法來解決這個問題，因爲下午3點。所以downvoting它說，這是缺乏研究是一種不公平..

Answer 1

這可能不是一個完整的答案，但我會嘗試解決當前代碼一個相當明顯的問題：

protected void managerOfSound(String theText) { 
    if (mp != null) { 
     mp.reset(); 
     mp.release(); //from this point on it is illegal 
         //to operate on the existing mp object 
    } 
//if you take one of these branches you will get a new mp instance, and be fine 
    if (theText.equals(campfire)) 
     mp = MediaPlayer.create(this, R.raw.campfire); 
    else if (theText.equals(calmthunder)) 
     mp = MediaPlayer.create(this, R.raw.calmthunderstorm); 
    else if (theText.equals(rainthunder)) 
     mp = MediaPlayer.create(this, R.raw.rainthunder); 
    else if (theText.equals(whalesgulls)) 
     mp = MediaPlayer.create(this, R.raw.whalesandgulls); 
//but if you take this branch, you will be illegally operating on a released instance 
    else if (theText.equals(stopplaying)) 
     mp.pause(); 

    mp.start(); 
    mp.setLooping(true); 
} 

---

相反，做這樣的事情：

protected void managerOfSound(String theText) { 
    if (theText.equals(stopplaying)) { 
     if (mp != null) mp.pause(); 

    } else { //we are not pausing 
     if (mp != null) { //lets release any old one 
      mp.reset(); 
      mp.release(); 
     } 
     //and then get an appropriate new instance 
     if (theText.equals(campfire)) 
      mp = MediaPlayer.create(this, R.raw.campfire); 
     else if (theText.equals(calmthunder)) 
      mp = MediaPlayer.create(this, R.raw.calmthunderstorm); 
     else if (theText.equals(rainthunder)) 
      mp = MediaPlayer.create(this, R.raw.rainthunder); 
     else if (theText.equals(whalesgulls)) 
      mp = MediaPlayer.create(this, R.raw.whalesandgulls); 
     //Note this will still fail if there is some OTHER possibility 
     mp.start(); 
     mp.setLooping(true); 
     } 
}