Question

这种安乐器的回收用具充其量,我花了整天,试图找到工作。

This is my code and which is not working

public class CustomCursorAdapter extends SimpleCursorAdapter {

    private Context currentContext;
    private Cursor mCursor;
    private boolean[] rows;

    public CustomCursorAdapter(Context context, int layout, Cursor c,
            String[] from, int[] to) {
        super(context, layout, c, from, to);
        // TODO Auto-generated constructor stub
        currentContext = context;
        mCursor = c;
        populateRows();
    }

    private void populateRows() {
        rows = new boolean[mCursor.getCount()];
        int i = 0;
        while (mCursor.moveToNext()) {
            rows[i] = false;
            i++;            
        }

    }

    @Override
    public View getView(int position, View v, ViewGroup parent) {
        // convertView.setBackgroundColor(R.drawable.darkred);
        if (v != null) {
            //getting checkbox
            CheckBox cb = (CheckBox) v.findViewById(R.id.name);

            if(rows[position]){
                rows[position] = false;
            }else{
                rows[position] = true;
            }
            cb.setChecked(rows[position]);

        }

        return super.getView(position, v, parent);
    }

}

感谢任何帮助。

Answer 1

这里有许多错误:

Don t change state in getView. I refer to flipping rows[position]. getView may be called many times to draw the same list row. As a side note you can flip by using a = !a;
Set the checked state out of the if on v != null. If you recycle a view, you still need to initialize it s UI, as it may be set with state of a different data row.
If the view is not null, and you reuse it, return it
If the view is null, you need to create new instances, for example by inflating layout

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