在Cursor中的simple_list_item_checked中设置复选框

Question

I am beginner in Android developing.

I have a ListView of type android.R.layout.simple_list_item_checked and I am trying to set the checkbox to value, which is in my Cursor under name "CHECKED". The problem is that I cannot find the id of the checkbox (I have tried android.R.id.checkbox, but it hasn't worked) and I don't know, how to set it based on my Cursor. The cursor is created from SQLite database table, where the "CHECKED" column is BOOLEAN type.

My code, which is not working:

lv.setAdapter(
                new SimpleCursorAdapter(MainActivity.this, android.R.layout.simple_list_item_checked, mCursor,
                        new String[]{"NOTES", "CHECKED"}, new int[]{android.R.id.text1, android.R.id.checkbox}, 0));

Could you help me, please? Thanks in advance.

Answer 1

如果您查看R.layout.simple_list_item_checked xml文件，您将看到复选框ID为@android:id/text1

Answer 2

The short answer is that SimpleCursorAdapter will not suffice for the task you want.

If you look inside into its public void bindView(View view, Context context, Cursor cursor) method (this is where the magic happens and your views are attached to the data you want to see) you can verify how the SimpleCursorAdapter does this, and in its logic there is no use case for binding a CheckedTextView

You can see for yourself here in Google's code :

if (v instanceof TextView) {
   setViewText((TextView) v, text);
} 
else if (v instanceof ImageView) {
          setViewImage((ImageView) v, text);
     } 
else {
       throw new IllegalStateException(v.getClass().getName() + " is not a " +
                                " view that can be bounds by this SimpleCursorAdapter");
                    }

The only reason you are not getting the IllegalStateException is because CheckedTextView extends TextView.