Question

我对android很新。我想根据微调器中的选定选项更改活动内容。例如，我在微调器“Option2”和“Option2”中有两个选项和两个日期选择器。我希望我的活动以这种方式工作，当我选择选项1时，我应该看到一个日期选择器，当我选择选项2时，我会动态地看到两个日期选择器。

这是我的微调器代码

Spinner spinner= (Spinner) findViewById(R.id.spinner);
final List<String> List=new ArrayList<String>();
    List.add("Option1");
    List.add("Option2");

ArrayAdapter<String> Adapter=new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1,List);
    Adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    triptype.setAdapter(Adapter);
spinner.setOnItemSelectedListener(new OnItemSelectedListener()
    {
            @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int position, long id) {
            // TODO Auto-generated method stub
            int pos1=position;
            selectedOption=spinner.getSelectedItem().toString();

            prefs = getSharedPreferences(prefName, MODE_PRIVATE);
            SharedPreferences.Editor editor = prefs.edit();

            //---save the values in the EditText view to preferences---
            editor.putInt("index", pos1);
            editor.putString("value", selectedoption);

            //---saves the values---
            editor.commit();

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub

        }

    });

Answer 1

如果您不想创建datepicker运行时，那么您应该在xml文件中添加两个日期选择器。记住，将日期选择器的两个位置保持在xml上是相同的。并将两个可见性设置为“GONE”。

类文件：

spinner.setOnItemSelectedListener(new OnItemSelectedListener()
{
        @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1,
            int position, long id) {
        // TODO Auto-generated method stub
        //set visibility of datepicker
       if(position==0)
        {
           set "visible" to datepicker1,
           set "gone" to datepicker2.
        }
       if(position==1)
        {
           set "gone" to datepicker1,
           set "visible" to datepicker2.
        }
    }
}

Answer 2

在onItemSelected方法

上的spinners上动态添加timePicker

   @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int position, long id) {
                // TODO Auto-generated method stub

                int pos1=position;
for(int i=0;i<mainlayout.getChildCount();i++)
{
   View v=mainlayout.getChildAt(i)
   if(v instanceof TimePicker)
    mainlayout.removeView(v);

}

if(pos==0)
{
    TimePicker t=new TimePicker (context);
    mainlayout.addView(t);
 }


else
{


TimePicker t1=new TimePicker (context);
    mainlayout.addView(t1);

TimePicker t2=new TimePicker (context);
    mainlayout.addView(t2);
}   
    }

根据微调器的选项更改活动内容？

2 个答案: