遊標適配器中的IF語句？

Question

private void datafill() 
{ 
     Cursor notesCursor = mDbHelper.fetchAllNotes(); 
     startManagingCursor(notesCursor); 

     /* JournalRowId is the row id from the first database containing all journal names 
     All notes are kept in database 2. I want only the notes that correspond to each 
     journal to be listed, KEY_HOMEID is the non visible field that shows where 
     each note came from. 

     * 
     */ 
     if (editjournalDbAdapter.KEY_HOMEID == journalRowId){ 
     String[] from = new String[]{editjournalDbAdapter.KEY_HEIGHT}; 

     int[] to = new int[]{R.id.detail1}; 
     } 
      //Error here "from" and "to" are not defined outside of if statement 
     SimpleCursorAdapter notes = 
      new SimpleCursorAdapter(this, R.layout.journaldetailrow, notesCursor, from, to); 
     setListAdapter(notes); 
    } 

Answer 1

「from」和「to」只存在於if（）語句的範圍內。無論如何不會有多少意義 - 即使他們這樣做了，他們的內容將是未定義的（或者在Java的情況下爲空），並立即崩潰您的應用程序。

我不知道你在做什麼，但是你可能還需要在if（）塊內部的底部兩條語句。