android - 无法让 DialogFragment 以编程方式关闭

Question

我有一个 DialogFragment，显示要从中选择的项目列表(类似于 Messaging 中的附加对话框)。

我的问题是，当我选择了一个项目时，我无法让这个对话框消失。我试过在 OnItemClickListener 中调用 dismiss() 和 getDialog().dismiss()，但没有成功。我试图通过 FragmentManager 删除对话框，我尝试了 fragmentManager.popBackStack()，但都无济于事。我无法关闭此对话框。单击对话框外部或点击后退按钮时，它会正常消失，但我的代码中没有任何内容会使它消失。

有没有人见过这个？如何让对话框正确关闭？

对话代码:

public class ShareDialog extends DialogFragment {

public enum ShareType {
    Camera, Gallery, Web, Whiteboard, Browse,
}

BaseAdapter mShareAdapter = new BaseAdapter() {

    @Override
    public View getView(int position, View contentView, ViewGroup parent) {
        TextView view = null;
        if (contentView == null) {
            view = (TextView) getLayoutInflater(null).inflate(android.R.layout.simple_list_item_1, parent, false);
        } else {
            view = (TextView) contentView;
        }
        int draw = 0;
        switch (ShareType.values()[position]) {
        case Browse:
            view.setText("Browse Content...");
            draw = R.drawable.ic_share_browse;
            break;
        case Camera:
            view.setText("Image from Camera...");
            draw = R.drawable.ic_share_camera;
            break;
        case Gallery:
            view.setText("Image from Gallery...");
            draw = R.drawable.ic_share_gallery;
            break;
        case Web:
            view.setText("New Browsing Session");
            draw = R.drawable.ic_share_web;
            break;
        case Whiteboard:
            view.setText("New Whiteboard");
            draw = R.drawable.ic_share_whiteboard;
            break;
        }
        view.setCompoundDrawablesWithIntrinsicBounds(draw, 0, 0, 0);
        view.setCompoundDrawablePadding(8);
        return view;
    }

    @Override
    public long getItemId(int position) {
        return ShareType.values()[position].ordinal();
    }

    @Override
    public Object getItem(int position) {
        return ShareType.values()[position];
    }

    @Override
    public int getCount() {
        return ShareType.values().length;
    }
};

public Dialog onCreateDialog(android.os.Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    builder.setTitle("Share which?");
    ListView list = new ListView(getActivity());
    list.setAdapter(mShareAdapter);
    list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long itemId) {
            dismiss(); // WHY DOESN'T THIS WORK???
            if (listener != null)
                listener.newShare((ShareType) mShareAdapter.getItem(position));
        }
    });
    builder.setView(list);
    return builder.create();
}

public interface ShareDialogListener {
    void newShare(ShareType type);
}

private ShareDialogListener listener;

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
    // Verify that the host activity implements the callback interface
    try {
        // Instantiate the AutoconnectListener so we can send events to the host
        listener = (ShareDialogListener) activity;
    } catch (ClassCastException e) {
        // The activity doesn't implement the interface, throw exception
        throw new ClassCastException(activity.toString() + " must implement ShareDialogListener");
    }
}

}

Answer 1

为什么不使用 AlertDialog.Builder 上可用的方法来构建列表，而不是创建您自己的 ListView 并填充它？

我修改了您的示例代码以展示其工作原理，在此示例中，对话框 dismiss() 功能正常。

public Dialog onCreateDialog(android.os.Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        builder.setSingleChoiceItems(mShareAdapter, 0, new OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                if (listener != null) {
                    listener.newShare((ShareType) mShareAdapter.getItem(which));
                }
            }
        });
        builder.setTitle("Share which?");
        return builder.create();
    }