片段中的圖片庫錯誤

Question

我正在試圖製作一個帶有圖片庫的應用程序，裏面有一個片段，但沒有在代碼中得到錯誤，但是在下面得到這個錯誤。任何幫助都會很棒，只有初學者。如果您希望獲得更多詳細信息，請詢問。 （GridView）getView（）。findViewById（R.id.gridview）;我們可以看到它的第34行：GridView gridview =（GridView）getView（）。findViewById（R.id.gridview）;

代碼：

public class Fragment_3 extends Fragment{ 
    private static View view; 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     if (view != null) { 
      ViewGroup parent = (ViewGroup) view.getParent(); 
      if (parent != null) 
       parent.removeView(view); 
     } 
     try { 
      view = inflater.inflate(R.layout.fragment_3, container, false); 
     } catch (InflateException e) { 
     } 

    GridView gridview = (GridView) getView().findViewById(R.id.gridview); 
     gridview.setAdapter(new ImageAdapter(this.getActivity())); 

     gridview.setOnItemClickListener(new OnItemClickListener() { 
      public void onItemClick(AdapterView<?> parent, View v, int position, long id) { 
       Toast.makeText(Fragment_3.this.getActivity(), "" + position, Toast.LENGTH_SHORT).show(); 
      } 
     }); 

     return view; 
} 

    public class ImageAdapter extends BaseAdapter { 
     private Context mContext; 

     public ImageAdapter(Context c) { 
      mContext = c; 
     } 

     public int getCount() { 
      return mThumbIds.length; 
     } 

     public Object getItem(int position) { 
      return null; 
     } 

     public long getItemId(int position) { 
      return 0; 
     } 

     // create a new ImageView for each item referenced by the Adapter 
     public View getView(int position, View convertView, ViewGroup parent) { 
      ImageView imageView; 
      if (convertView == null) { // if it's not recycled, initialize some attributes 
       imageView = new ImageView(mContext); 
       imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); 
       imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
       imageView.setPadding(8, 8, 8, 8); 
      } else { 
       imageView = (ImageView) convertView; 
      } 

      imageView.setImageResource(mThumbIds[position]); 
      return imageView; 
     } 

     // references to our images 
     private Integer[] mThumbIds = { 
       R.drawable.sample_2, R.drawable.sample_3, 
       R.drawable.sample_4, R.drawable.sample_5, 
       R.drawable.sample_6, R.drawable.sample_7, 
       R.drawable.sample_0, R.drawable.sample_1, 
       R.drawable.sample_2, R.drawable.sample_3, 
       R.drawable.sample_4, R.drawable.sample_5, 
       R.drawable.sample_6, R.drawable.sample_7, 
       R.drawable.sample_0, R.drawable.sample_1, 
       R.drawable.sample_2, R.drawable.sample_3, 
       R.drawable.sample_4, R.drawable.sample_5, 
       R.drawable.sample_6, R.drawable.sample_7 
     }; 
    } 
} 

錯誤

06-24 14:02:27.385: E/AndroidRuntime(3959): FATAL EXCEPTION: main 
06-24 14:02:27.385: E/AndroidRuntime(3959): java.lang.NullPointerException 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at com.bottlecapp.ahmetmikko.Fragment_3.onCreateView(Fragment_3.java:34) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.os.Handler.handleCallback(Handler.java:725) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.os.Handler.dispatchMessage(Handler.java:92) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.os.Looper.loop(Looper.java:137) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at java.lang.reflect.Method.invoke(Method.java:511) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
06-24 14:02:27.385: E/AndroidRuntime(3959):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

是否有一個原因，你有你的onCreate導致返回View一個try catch塊？語法明智，您不需要getView()您的GridView，你可以做GridView gridview = (GridView) findViewById(R.id.gridview);但它看起來像你得到一個NullPointerException。你能告訴我們第34行是什麼嗎？