Error OnActionItemClicked

我有一个很奇怪的问题。在使用SherlockActionBar时，我成功设置了上下文操作栏。当我选择其中一个动作模式按钮时，显示吐司消息正常工作。当我通过我的方法电话saveRing()交换时，我得到一个关闭的力量。错误必须在我的saveRing()方法中，但我无法弄清楚。当我从弹出的上下文菜单调用它时，saveRing方法正常工作。Error OnActionItemClicked

我saveRing（）：

public boolean saveRing(int raw_resource, String title) { 
     byte[] buffer = null; 
     InputStream fIn = getBaseContext().getResources() 
       .openRawResource(raw_resource); 
     int size = 0; 

     try { 
      size = fIn.available(); 
      buffer = new byte[size]; 
      fIn.read(buffer); 
      fIn.close(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      return false; 
     } 

     String path = "/sdcard/media/audio/ringtones/"; 
     String filename = title + ".mp3"; 

     boolean exists = (new File(path)).exists(); 
     if (!exists) { 
      new File(path).mkdirs(); 
     } 
     FileOutputStream save; 
     try { 
      save = new FileOutputStream(path + filename); 
      save.write(buffer); 
      save.flush(); 
      save.close(); 
     } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return false; 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return false; 
     } 
     sendBroadcast(
       new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri 
         .parse("file://" + path + filename))); 

     File k = new File(path, filename); 

     ContentValues values = new ContentValues(); 
     values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath()); 
     values.put(MediaStore.MediaColumns.TITLE, title); 
     values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3"); 
     values.put(MediaStore.Audio.Media.ARTIST, "Epic Meal Time "); 
     values.put(MediaStore.Audio.Media.IS_RINGTONE, true); 
     values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false); 
     values.put(MediaStore.Audio.Media.IS_ALARM, false); 
     values.put(MediaStore.Audio.Media.IS_MUSIC, false); 

     Uri pURI = MediaStore.Audio.Media.getContentUriForPath(k 
       .getAbsolutePath()); 

     // remove entry every time so we don't get duplicate entries and have a 
     // problem setting a 2nd time 
     getContentResolver().delete(
       pURI, 
       MediaStore.MediaColumns.DATA + "=\"" + k.getAbsolutePath() 
         + "\"", null); 

     Uri nURI = getContentResolver().insert(pURI, 
       values); 

     RingtoneManager.setActualDefaultRingtoneUri(this, 
       RingtoneManager.TYPE_RINGTONE, nURI); 
     Toast.makeText(this, title + " Ringtone set", 
       Toast.LENGTH_LONG).show(); 

     return true; 
    }

的logcat：

02-19 21:38:47.691: E/AndroidRuntime(20492): FATAL EXCEPTION: main 
02-19 21:38:47.691: E/AndroidRuntime(20492): java.lang.NullPointerException 
02-19 21:38:47.691: E/AndroidRuntime(20492): at vartanian.android.epicmealtimepro.Tab3Fragment$mActionModeCallback.onActionItemClicked(Tab3Fragment.java:346) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.actionbarsherlock.internal.ActionBarSherlockNative$ActionModeCallbackWrapper.onActionItemClicked(ActionBarSherlockNative.java:243) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.policy.impl.PhoneWindow$DecorView$ActionModeCallbackWrapper.onActionItemClicked(PhoneWindow.java:2552) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.app.ActionBarImpl$ActionModeImpl.onMenuItemSelected(ActionBarImpl.java:931) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:735) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:149) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:874) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:514) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:99) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.view.View.performClick(View.java:4091) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.view.View$PerformClick.run(View.java:17036) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.os.Handler.handleCallback(Handler.java:615) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.os.Handler.dispatchMessage(Handler.java:92) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.os.Looper.loop(Looper.java:137) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at android.app.ActivityThread.main(ActivityThread.java:4962) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at java.lang.reflect.Method.invokeNative(Native Method) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at java.lang.reflect.Method.invoke(Method.java:511) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 
02-19 21:38:47.691: E/AndroidRuntime(20492): at dalvik.system.NativeStart.main(Native Method) 
02-19 21:38:49.262: I/Process(20492): Sending signal. PID: 20492 SIG: 9

谢谢！编辑：这是我在346行的代码：ma.saveRing(R.raw.quaq_language, values[2]);

有错误的行取决于ListFragment中哪个项目调用CAB。我把它设置有switch声明是这样的：

case R.id.ringtone: 
       switch (viewId) { 
       case 0: 
        ma.saveRing(R.raw.ohhh_gurllll, values[0]); 
        break; 
       case 1: 
        ma.saveRing(R.raw.pork_balls, values[1]); 
        break;

的viewId是ListFragment中的位置。问题似乎是值[]为空，但我不知道为什么。这是它初始化的地方：

public class Tab3Fragment extends SherlockListFragment { 

    String[] values = new String[] { "Ohh Gurl", "Pork Balls", "Language", 
      "Really Good Idea", "Rice Paper Bacon Condom", 
      "Rise and Shine", "Roll One Up Homie", 
      "Save The Hate For Twitter", "Snap, Crackle, Pop", 
      "Let's Get Girls", "Spanish", 
      "We Make Steak Look Like Cabbage", "Wake Up McDonalds", 
      "Super Moist", "Stupid, Tasty Birds", "Bacon Moment", 
      "Today We Eat Smart", "We Are Gonna Die On Youtube", 
      "Drunk Off Pancakes", "Ketchup", "We Eat All Our Babies", 
      "Maximum Meat Experience", "Stop Hating", "What Up Bitches", 
      "Whatcha Know About Bullets", 
      "Whatcha Know About Terrible Food", "CANADA", "Beiber Concert", 
      "Ending Riceism", "You Ain't Got What We Got", "F*cking Noob", 
      "Constructed Meat Base", "Want Some Of These Nuts" };

这是填充arrayadapter的字符串数组。

来源

2013-02-20 Justin Vartanian

能否请您发布此代码：在vartanian.android.epicmealtimepro.Tab3Fragment $ mActionModeCallback.onActionItemClicked（Tab3Fragment。 java：346） – 2013-02-20 19:55:30

@GauravArora编辑过的文章 – 2013-02-20 20:03:18

在switch语句上放置一个断点并逐步完成。从你显示的内容（假设你的R.raw资源是正确设置的），它看起来像是[x]或者'ma'都是空的。 – Simon 2013-02-20 20:07:47

所以我终于明白了。我将getSherlockActivity（）传入我的saveRing（），并在整个方法中使用该上下文。我不知道为什么会有用的SherlockFragmentActivity方面的问题，但是，这是它的外观：

public boolean saveRing(int raw_resource, String title, Context context) { 
     byte[] buffer = null; 
     InputStream fIn = context.getResources() 
       .openRawResource(raw_resource); 
     int size = 0; 

     try { 
      size = fIn.available(); 
      buffer = new byte[size]; 
      fIn.read(buffer); 
      fIn.close(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      return false; 
     } 

     String path = "/sdcard/media/audio/ringtones/"; 
     String filename = title + ".mp3"; 

     boolean exists = (new File(path)).exists(); 
     if (!exists) { 
      new File(path).mkdirs(); 
     } 
     FileOutputStream save; 
     try { 
      save = new FileOutputStream(path + filename); 
      save.write(buffer); 
      save.flush(); 
      save.close(); 
     } catch (FileNotFoundException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return false; 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
      return false; 
     } 
     context.sendBroadcast(
       new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri 
         .parse("file://" + path + filename))); 

     File k = new File(path, filename); 

     ContentValues values = new ContentValues(); 
     values.put(MediaStore.MediaColumns.DATA, k.getAbsolutePath()); 
     values.put(MediaStore.MediaColumns.TITLE, title); 
     values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3"); 
     values.put(MediaStore.Audio.Media.ARTIST, "Epic Meal Time "); 
     values.put(MediaStore.Audio.Media.IS_RINGTONE, true); 
     values.put(MediaStore.Audio.Media.IS_NOTIFICATION, false); 
     values.put(MediaStore.Audio.Media.IS_ALARM, false); 
     values.put(MediaStore.Audio.Media.IS_MUSIC, false); 

     Uri pURI = MediaStore.Audio.Media.getContentUriForPath(k 
       .getAbsolutePath()); 

     // remove entry every time so we don't get duplicate entries and have a 
     // problem setting a 2nd time 
     context.getContentResolver().delete(
       pURI, 
       MediaStore.MediaColumns.DATA + "=\"" + k.getAbsolutePath() 
         + "\"", null); 

     Uri nURI = context.getContentResolver().insert(pURI, 
       values); 

     RingtoneManager.setActualDefaultRingtoneUri(context, 
       RingtoneManager.TYPE_RINGTONE, nURI); 
     Toast.makeText(context, title + " Ringtone set", 
       Toast.LENGTH_LONG).show(); 

     return true; 
    }

来源

2013-02-21 04:08:49

Error OnActionItemClicked

回答

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