单击项目时启用/禁用对话框按钮

Question

我设计了一个包含列表视图的警告对话框。我只想在单击项目时启用对话框的正按钮，否则禁用它。点击后我无法启用该按钮。在下面找到我的代码：

LayoutInflater inflater = LayoutInflater.from(getActivity());
View view = (View)inflater.inflate(R.layout.action_list, null);

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity());
alertDialogBuilder.setTitle("Select any action");
alertDialogBuilder.setView(view);
alertDialogBuilder.setInverseBackgroundForced(true);

actionLV = (ListView)view.findViewById(R.id.action_list);
actionLV.setAdapter(new ActionListAdapter(actionAL,getActivity()));

alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){

    public void onClick(DialogInterface dialog,int which) {

        // Write your code here to invoke YES event
        Toast.makeText(getActivity().getApplicationContext(), "You clicked on Cancel",
        Toast.LENGTH_SHORT).show();
    }
});

alertDialogBuilder.setPositiveButton("Done", new DialogInterface.OnClickListener(){

    public void onClick(DialogInterface dialog,int which) {  

        Intent intent = new Intent(getActivity(),LogItActivity.class);
        intent.putExtra("ACTION_NAME", ActionListAdapter.checkedActionName);
        startActivity(intent);
    }
});

AlertDialog alertDialog = alertDialogBuilder.create();

alertDialog.setOnShowListener(new OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            if(ActionListAdapter.checkedActionName != null){
                done.setEnabled(true);
            }
        }
    });
alertDialog.show();

done = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
done.setEnabled(false);
if(ActionListAdapter.checkedActionName!= null){
    alertDialog.show();
}

有人请指导我。

Answer 1

int listItem;

1. 默认setenabled false。
列表视图中的
2. setonitemclicklistner;
3. on item click listItem = position并更改所选项目的coloe并设置为enabled true