Splash with Music onPause問題

Question

即時通訊新的Android和試圖解決錯誤與我一起嘗試添加啓動音樂到我的應用程序，波紋管代碼啓動應用程序的三個選項開始取決於用戶偏好但仍然強制關閉，

請任何幫助，將不勝感激。

public class Splash extends Activity{ 
MediaPlayer ourSong; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    this.requestWindowFeature(Window.FEATURE_NO_TITLE); 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
     setContentView(R.layout.splash); 

     SharedPreferences getPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext());     

     boolean without_splash_screen = getPrefs.getBoolean("without_splash_screen", true); 
      if (without_splash_screen == true) 
      { 
       Intent intent = new Intent(Splash.this, MainActivity.class);          
         startActivity(intent);} 

    boolean splash = getPrefs.getBoolean("splash", true);  
    if(splash == true) { 
     setContentView(R.layout.splash); 
     Thread timer = new Thread() 
     { 
      public void run() 
      { 
       try 
       { 
        sleep(1000); 
       } 
       catch (InterruptedException e) 
       { 
        e.printStackTrace(); 
       } 
       finally 
       { 
        Intent intent = new Intent(Splash.this, MainActivity.class);          
         startActivity(intent); 
       } 
      }       
     }; 
     timer.start(); 
    }     
    boolean splash_music = getPrefs.getBoolean("splash_music", true); 
    if (splash_music) {   
     setContentView(R.layout.splash); 
     ourSong = MediaPlayer.create(Splash.this, R.raw.splashsound);   
     ourSong.start(); 
     Thread timer = new Thread() 
     { 
      public void run() 
      { 
       try 
       { 
        sleep(1000); 
       } 
       catch (InterruptedException e) 
       { 
        e.printStackTrace(); 
       } 
       finally 
       { 
        Intent intent = new Intent(Splash.this, MainActivity.class);          
         startActivity(intent); 
       } 
      }       
     }; 
     timer.start();    
    } 
    }  
    @Override 
    protected void onPause() { 
       // TODO Auto-generated method stub 
     super.onPause(); 
     ourSong.start(); 
     finish(); 
       } 
      } 

的logcat：

java.lang.RuntimeException: Unable to pause activity {com.test.demo/com.test.demo.Splash}: 
java.lang.NullPointerException 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2358) 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2315) 
at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:2295) 
at android.app.ActivityThread.access$1700(ActivityThread.java:117) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:942) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:130) 
at android.app.ActivityThread.main(ActivityThread.java:3687) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:507) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) 
at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.NullPointerException 
at com.test.demo.Splash.onPause(Splash.java:89) 
at android.app.Activity.performPause(Activity.java:3862) 
at android.app.Instrumentation.callActivityOnPause(Instrumentation.java:1191) 
at android.app.ActivityThread.performPauseActivity(ActivityThread.java:2345) 

Answer 1

看起來our_song是null如果splash_music是false所以你要改變你的onPause()以檢查

@Override 
    protected void onPause() 
    {    
     super.onPause(); 
     if (ourSong != null) 
     { 
      ourSong.start(); 
     } 
     finish(); 
    } 

雖然，我不知道你爲什麼在那裏打電話start()。你的意思是stop()？