充氣2個佈局上的GridView項= CRASH :(

Question

林製作UI喜歡的圖片： Sketch

1. 所以，當我點擊它，改變它的內容放到一個小菜單一個gridview項

   ？

2. 什麼是處理這個正確的方式我的解決辦法2點佈局，膨脹的項目上點擊， 與刷新：adapter.notifyDataSetChanged（）;

3. 它運作良好unti你向下滾動（直到物品出現在視線之外）然後崩潰。

4. 這是我getView（）代碼：

   public View getView(int position, View convertView, ViewGroup parent) { 
   View row = convertView; 
   RecordHolder holder = null; 
   
   
   Item item = data.get(position); 
   LayoutInflater inflater = ((Activity) context).getLayoutInflater(); 
   
   if (row == null) { 
   
       row = inflater.inflate(layoutResourceId, parent, false); 
       holder = new RecordHolder(); 
       holder.txtTitle = (TextView) row.findViewById(R.id.item_text); 
       holder.imageItem = (ImageView) row.findViewById(R.id.item_image); 
       row.setTag(holder); 
   } 
   else { 
       holder = (RecordHolder) row.getTag(); 
   } 
   
   if(item.showMenu == true && item.menuShown == false) 
   { 
       item.menuShown = true; 
       row = inflater.inflate(layoutResourceId_menu, parent, false); 
       holder = new RecordHolder(); 
       holder.button1 = (Button) row.findViewById(R.id.button1); 
       holder.button2 = (Button) row.findViewById(R.id.button2); 
       row.setTag(holder); 
   } 
   
   if(item.showMenu == true && item.menuShown == true) 
   { 
       holder.button1.setText("asdsad"); 
       holder.button2.setText("asdasdd"); 
   } 
   
   if(item.showMenu == false && item.menuShown == true) 
   { 
       row = inflater.inflate(layoutResourceId, parent, false); 
       holder = new RecordHolder(); 
       holder.txtTitle = (TextView) row.findViewById(R.id.item_text); 
       holder.imageItem = (ImageView) row.findViewById(R.id.item_image); 
       row.setTag(holder); 
       holder.txtTitle.setText(item.getTitle()); 
       holder.imageItem.setImageBitmap(item.getImage()); 
   } 
   if(item.showMenu == false && item.menuShown == false) 
   { 
       holder.txtTitle.setText(item.getTitle()); 
       holder.imageItem.setImageBitmap(item.getImage()); 
   } 
   return row; 
   

   }

不管我嘗試它總是崩潰。 我在做這個對嗎？

UPDATE 這裏是logcat的：

06-21 17:37:39.735 3308-3308/? E/AndroidRuntime﹕ FATAL EXCEPTION: main 
Process: com.example.menu_grid_view_page, PID: 3308 
java.lang.NullPointerException 
     at com.example.menu_grid_view_page.CustomGridViewAdapter.getView(CustomGridViewAdapter.java:91) 
     at android.widget.AbsListView.obtainView(AbsListView.java:2240) 
     at android.widget.GridView.makeAndAddView(GridView.java:1345) 
     at android.widget.GridView.makeRow(GridView.java:345) 
     at android.widget.GridView.fillDown(GridView.java:287) 
     at android.widget.GridView.fillGap(GridView.java:247) 
     at android.widget.AbsListView.trackMotionScroll(AbsListView.java:5136) 
     at android.widget.AbsListView$FlingRunnable.run(AbsListView.java:4247) 
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761) 
     at android.view.Choreographer.doCallbacks(Choreographer.java:574) 
     at android.view.Choreographer.doFrame(Choreographer.java:543) 
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747) 
     at android.os.Handler.handleCallback(Handler.java:733) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:136) 
     at android.app.ActivityThread.main(ActivityThread.java:5081) 
     at java.lang.reflect.Method.invokeNative(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:515) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:781) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
     at dalvik.system.NativeStart.main(Native Method) 

Answer 1

您正在膨脹的兩個視圖，並且僅使用一個視圖持有者。有可能是情況，當行不爲空，但holder.txtTitle爲空。代碼 Instade：

if (row == null) { 
.. 
} else { 
.. 
} 

嘗試使用：

boolean inflated = false; 
if (row != null) { 
    holder = (RecordHolder) row.getTag(); 
    if (holder.imageItem != null) { 
     inflated = true; 
    } 
} 

if(!inflated) { 
    row = inflater.inflate(layoutResourceId, parent, false); 
    holder = new RecordHolder(); 
    holder.txtTitle = (TextView) row.findViewById(R.id.item_text); 
    holder.imageItem = (ImageView) row.findViewById(R.id.item_image); 
    row.setTag(holder); 
}