Question

我按下按钮打开一个微调器。现在，当我选择一个微调器项时，我的setOnItemSelectedListener不会被触发。只有微调器在选择项目时才会关闭。

代码如下： -

holder.button.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            final Spinner spinner = new Spinner(activity);
            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

                @Override
                public void onItemSelected(AdapterView<?> parent, View view,
                        int position, long id) {
                    Toast.makeText(activity,"Selected",Toast.LENGTH_LONG).show();
                }

                @Override
                public void onNothingSelected(AdapterView<?> parent) {
                    // TODO Auto-generated method stub

                }
            });
            final CustomSpinnerAdapter adapter = new CustomSpinnerAdapter(
                    activity);
            spinner.setAdapter(adapter);
            spinner.performClick();
        }
    });

Answer 1

我认为问题在行

final Spinner spinner = new Spinner(activity);

我们的微调器具有修饰符“final”，尝试将我们的微调器声明为一个字段。例如：

holder.button.setOnClickListener(new OnClickListener() {
    Spinner spinner;
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        spinner = new Spinner(activity);
        ...
    }
});

spinner setOnItemSelectedListener不起作用

1 个答案: