Question

如果我们在微调器中有一些项目（如下所示）我们如何在运行时添加额外的项目

这是代码：

    String[] Items = {
                "Alarm",
                "Office",
                "Meeting",
                "Party",
                "Lunch",
                "Breakfast",
                "Supper",
                "Home",
                "Private",
                "Outdoor",
                "Family",
                "Friends",
                "Others"
        };

    Spinner s1;

和

  s1 = (Spinner) findViewById(R.id.spinner);

   ArrayAdapter<String> adapter  = new ArrayAdapter<String>(
            this,android.R.layout.simple_spinner_item,Items);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    s1.setAdapter(adapter);
    s1.setOnItemSelectedListener(new OnItemSelectedListener()
    {
        public void onItemSelected(AdapterView<?> arg0, 
        View arg1, int arg2, long arg3) 
        {
            int index = s1.getSelectedItemPosition();
            Toast.makeText(getBaseContext(), 
                "You have selected item : " + Items[index], 
                Toast.LENGTH_SHORT).show(); 

            if (index==12)
            {
                EditText edit = (EditText) findViewById(R.id.edittext);
                Button add=(Button) findViewById(R.id.add);
                edit.setVisibility(View.VISIBLE);
                add.setVisibility(View.VISIBLE);


         }
            else
            {
                EditText edit = (EditText) findViewById(R.id.edittext);
                Button add=(Button) findViewById(R.id.add);
                edit.setVisibility(View.GONE);
                add.setVisibility(View.GONE);
            }
        }

        public void onNothingSelected(AdapterView<?> arg0) {}
    });  

}

如果选择“其他”意味着我们要在微调器列表中添加额外的项目..

谢谢，

Answer 1

我希望你能在用户选择“其他人”时检测到这种情况

在这种情况下，在Items数组中添加其他值并调用函数adapter.notifyDataSetChanged()它应该适应更改，您应该在微调器中看到新值。

尝试一下并恢复原状。

Answer 2

您可以创建BaseAdapter，在运行时填充它并将适配器分配给微调器。

Answer 3

以下为我效劳：

/* Read values from resource into an array */
String[] strColorValues =  getResources().getStringArray(R.array.colors);

ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < strColorValues.length; i++) {
    list.add(strColorValues[i]);
}

ArrayAdapter adapterColors = new ArrayAdapter(getActivity(), android.R.layout.simple_spinner_item, list);

adapterColors.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

spinnerColors.setAdapter(adapterPermissionLevels);
spinnerColors.setOnItemSelectedListener(this);

/* Remove first element from the adapter and notify dataset changed. */
String item = spinnerColors.getItemAtPosition(0).toString();
adapterColors.remove(item);
adapterColors.notifyDataSetChanged();

如何在spinner中运行时添加更多项目

3 个答案: