Android MatrixCursor

Question

我试图让一个基本的矩阵光标运行，但出于某种原因，列表仍然是空的。如果有人能发现代码可能有什么问题，会很感激吗？

    String []columns = new String[] {"_id","Title","Desc"} ;
    MatrixCursor mc = new MatrixCursor(columns);
    startManagingCursor(mc);

    for(int i=0; i< 200;i++)
    {
        mc.addRow(new Object[]{i, "test"+i ,"..."});
    }

    ListView lv = (ListView)findViewById(R.id.alist);

    int [] r = new int[1];
    r[0] = R.id.atext;           // the id of the textview in test_list_item layout
    String [] s= new String[1];  
    s[0] = mc.getColumnName(1);  // the column to be used "Title"
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,android.R.layout.test_list_item,mc,s,r);

    lv.setAdapter(adapter);

Answer 1

未读取布局的原因是调用了不正确的布局：

        SimpleCursorAdapter(this,android.R.layout.list\_item,mc,s,r); Instead of:            SimpleCursorAdapter(this,R.layout.my\_list\_item,mc,s,r);