Question

我有一个具有微调器的活动，这是处理该微调器内的on项选择的方法。

public void onItemSelected(AdapterView<?> parent, View view, int pos,
        long id) {

             // Do stuff based on selection 
    }       
}

此外，我有一个按钮，代码看起来像这样

public void addListenerOnButton() {

    btnChangeDate = (Button) findViewById(R.id.btnChangeDate);

    btnChangeDate.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {

                            // This doesnt work
            onItemSelected(MyProfileActivity.this, v, 0, 2);

        }
    });
}

基本上我要做的就是通过按钮模拟在微调器中选择的项目。这甚至可能吗？

Answer 1

不要在按钮上调用onItemSelected方法，而应使用View.performItemClick方法点击按钮上的微调器项目单击它：

int item_postion=0;// item which you want to click
your_spinner.setSelection(item_postion, true);
View item_view = (View)your_spinner.getChildAt(item_postion);
long item_id = your_spinner.getAdapter().getItemId(item_postion);
your_spinner.performItemClick(item_view, 0, item_id);

Answer 2

试试这个..

btnChangeDate.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {

               spinner.setSelection(index);  // which you what set the spinner position

               String item = spinner.getSelectedItem().toString().trim();  //which you need to get the selected item from the spinner 

               System.out.println("Selected item : "+item):

      }

    });

Answer 3

试试这段代码：

    spin.performItemClick(view, position, id);

从按钮按下事件调用onitemselected方法

3 个答案: