.kotlin：
val myStrings = arrayOf("One","Two","Three","Four")mySpinner.adapter = ArrayAdapter(this,android.R.layout.simple_spinner_dropdown_item,myStrings)mySpinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { override fun onNothingSelected(parent: AdapterView<*>?) { TODO("not implemented") //To change body of created functions use File | Settings | File Templates. } override fun onItemSelected(parent: AdapterView<*>?,view: View?,position: Int,id: Long) { TODO("not implemented") //To change body of created functions use File | Settings | File Templates. }}}
与Edittext中的“提示”选项相同,我需要Spinner中的默认文本.
最佳答案
没有任何默认方式在微调器中显示提示.
为此,您需要在数组中手动添加一个项目,如下所示.
val myStrings = arrayOf("Select","One","Four")
现在,
为Spinner定义自定义适配器并禁用第一项,如下所示.
@Overridepublic boolean isEnabled(int position) { if (position == 0) { // Disable the first item from Spinner // First item will be use for hint return false; } else { return true; }}
您可以更改颜色,如下所示
@Overridepublic View getDropDownView(int position,View convertView,ViewGroup parent) { View view = super.getDropDownView(position,convertView,parent); TextView tv = (TextView) view; if (position == 0) { // Set the hint text color gray tv.setTextColor(Color.GRAY); } else { tv.setTextColor(Color.BLACK); } return view;}
欲了解更多信息,请访问： –
