我有这个代码,我在CursorAdapter支持的ListView中过滤结果。
这是databaseHelper方法:
public Cursor getCategoryCursor(String constraints){
Cursor c = null;
if(constraints=="")
c=database.query("categoryTable", null , null, null, null, null, "category_name COLLATE NOCASE ASC");
else
c=database.rawQuery("SELECT category_name,_id FROM categoryTable WHERE category_name LIKE '%"+constraints+"%'", null);
return c;
}
定义此方法后,我在EditText上设置onTextChangeListener,如下所示:
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
ListView cLV=(ListView)InteractiveVoucher.this.findViewById(R.id.category_list);
CursorAdapter filterAdapter=(CursorAdapter)cLV.getAdapter();
filterAdapter.getFilter().filter(arg0.toString());
}
最后,当我运行代码时,我在adapterCalss中的这一行得到了错误:
public void bindView(View view, Context context, Cursor cursor) {
// TODO Auto-generated method stub
TextView tv=(TextView)view.findViewById(R.id.category_name);
//get the error on getColumnIndex() line
tv.setText(mCursor.getString(mCursor.getColumnIndex(mColumnName)));
tv.setTextSize(20);