从所选的Listview项目设置上下文菜单的标题

Question

如何从所选Listview项目中设置上下文菜单的标题？以下是我的主要活动.

public class OListActivity extends ListActivity {
......
......
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        registerForContextMenu(getListView());
        ......
......
        MatrixCursor cursor;
        cursor = NameManager.getnameList();
        startManagingCursor(cursor);
        String[] from = { "name", "info", "status", BaseColumns._ID };
        int[] to = { R.id.name, R.id.info, R.id.status };
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
                R.layout.row, cursor, from, to);
        setListAdapter(adapter);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Menu");// TODO Change to name of selected listview item.
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.context_menu, menu);
    }
.....
.....

我需要设置menu.setHeaderTitle为R.id.name.我知道另一个similer 问题,但它没有提到处理ListView具有多个textview 的复杂问题.

Answer 1

使用方法中的ContextMenuInfo参数onCreateContextMenu():

@Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);
        AdapterView.AdapterContextMenuInfo info;
        try {
            // Casts the incoming data object into the type for AdapterView objects.
            info = (AdapterView.AdapterContextMenuInfo) menuInfo;
        } catch (ClassCastException e) {
            // If the menu object can't be cast, logs an error.
            Log.e(TAG, "bad menuInfo", e);
            return;
        }
        Cursor cursor = (Cursor) getListAdapter().getItem(info.position);
        if (cursor == null) {
            // For some reason the requested item isn't available, do nothing
            return;
        }

        // if your column name is "name"
        menu.setHeaderTitle(cursor.getString(cursor.getColumnIndex("name")));
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.context_menu, menu);
    }