游标适配器中的IF语句？

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”只存在于if（）语句的范围内。无论如何不会有多少意义 - 即使他们这样做了，他们的内容将是未定义的（或者在Java的情况下为空），并立即崩溃您的应用程序。

我不知道你在做什么，但是你可能还需要在if（）块内部的底部两条语句。