发布运行时错误的媒体播放器

Question

我试图发挥我的音乐应用程序，我得到了以下错误：

07-22 15:44:14.936: W/KeyCharacterMap(277): No keyboard for id 0 
07-22 15:44:14.936: W/KeyCharacterMap(277): Using default keymap: /system/usr/keychars/qwerty.kcm.bin 
07-22 15:44:17.546: D/AndroidRuntime(277): Shutting down VM 
07-22 15:44:17.546: W/dalvikvm(277): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
07-22 15:44:17.596: E/AndroidRuntime(277): FATAL EXCEPTION: main 
07-22 15:44:17.596: E/AndroidRuntime(277): java.lang.RuntimeException: Unable to pause activity {com.testasaf.asaf.guttman/com.testasaf.asaf.guttman.Intro}: java.lang.NullPointerException 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3348) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3305) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3288) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.access$2500(ActivityThread.java:125) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2040) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.os.Looper.loop(Looper.java:123) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-22 15:44:17.596: E/AndroidRuntime(277): at java.lang.reflect.Method.invokeNative(Native Method) 
07-22 15:44:17.596: E/AndroidRuntime(277): at java.lang.reflect.Method.invoke(Method.java:521) 
07-22 15:44:17.596: E/AndroidRuntime(277): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-22 15:44:17.596: E/AndroidRuntime(277): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-22 15:44:17.596: E/AndroidRuntime(277): at dalvik.system.NativeStart.main(Native Method) 
07-22 15:44:17.596: E/AndroidRuntime(277): Caused by: java.lang.NullPointerException 
07-22 15:44:17.596: E/AndroidRuntime(277): at com.testasaf.asaf.guttman.Intro.onPause(Intro.java:41) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.Activity.performPause(Activity.java:3842) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1190) 
07-22 15:44:17.596: E/AndroidRuntime(277): at android.app.ActivityThread.performPauseActivity(ActivityThread.java:3335) 
07-22 15:44:17.596: E/AndroidRuntime(277): ... 12 more 
07-22 15:44:19.685: I/Process(277): Sending signal. PID: 277 SIG: 9 

，这是代码

package com.testasaf.asaf.guttman; 

import com.testasaf.asaf.guttman.R; 
import android.app.Activity; 
import android.content.Intent; 
import android.media.MediaPlayer; 
import android.os.Bundle; 

public class Intro extends Activity { 
    MediaPlayer someSong; 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.intro); 
     MediaPlayer someSong= MediaPlayer.create(Intro.this,R.raw.music);//create an media player object 
     someSong.start();//start the music 
     Thread timer= new Thread(){//create new thread with anonymous class 
      public void run(){ 
       try{ 
        sleep(5000);//5 second pause 
       }catch(Exception e){ 
        e.printStackTrace();//print the stack trace if hvae an error 
       }finally{ 
        Intent saIntent=new Intent("com.testasaf.asaf.guttman.STARTINGPOINT"); 
        startActivity(saIntent);//Calling the other activity 
       } 
      } 
     }; 
     timer.start(); 
    } 
    protected void onPause() { 
     super.onPause(); 
     someSong.release();//release the song 
     finish(); 
    } 
} 

我觉得泰德的错误是在释放方法，我在intrnet和StackOverflow中搜索，但我没有找到任何答案。

Answer 1

与

someSong= MediaPlayer.create(Intro.this,R.raw.music);//create an media player object