Question

POJO CLASS GridItem：

public class GridItem {

    int id;

    String path;
    String name;
    String chr;
    int headerId;


    public GridItem(String path, String name, String chr){
        this.path = path;
        this.name = name;
        this.chr = chr;
    }
}

活动：

ArrayList<GridItem> books = new ArrayList<GridItem>();

现在我想将这个arraylist转换为光标，使sectionindexer成为gridview。所以我在下面的代码中使用该光标：

static class YOUR_ADAPTER extends SimpleCursorAdapter implements SectionIndexer {

private AlphabetIndexer mIndexer;

 YOUR_ADAPTER (Context context, AlbumBrowserActivity currentactivity,
            int layout, Cursor cursor, String[] from, int[] to) {
        super(context, layout, cursor, from, to);

        getColumnIndices(cursor);
    } 

    private void getColumnIndices(Cursor cursor) {
        if (cursor != null) {
            YOUR_COLUMN = cursor.getColumnIndexOrThrow(WHAT_YOU'RE_SORTING);

            if (mIndexer != null) {
                mIndexer.setCursor(cursor);
            } else {
                mIndexer = new AlphabetIndexer(cursor, YOUR_COLUMN, mResources.getString(
                        R.string.fast_scroll_alphabet));
            }
        }
    }

 public Object[] getSections() {
        return mIndexer.getSections();
    }

 public int getPositionForSection(int section) {
        return mIndexer.getPositionForSection(section);
    }

 public int getSectionForPosition(int position) {
        return 0;
    }
}

如果有人有解决方案，那么在这里公开..

Answer 1

您可能需要使用MatrixCursor，它是一个由对象数组支持的可变游标实现。使用newRow（）添加行。根据需要自动扩展内部容量。

在android中将对象arraylist转换为游标

1 个答案: