Android if语句中微调器的选定项
当所选值=0时,如何使用微调器的Android if语句中微调器的选定项,android,if-statement,Android,If Statement,当所选值=0时,如何使用微调器的if语句 if( wilayat.setSelection(0) || city.setSelection(0) || station.setSelection(0) || distnation.setSelection(0)) { message = "Select the 4 fields, please.."; Toast.makeText(BusArrivalTime.this, message,
if语句
if( wilayat.setSelection(0) || city.setSelection(0) ||
station.setSelection(0) || distnation.setSelection(0)) {
message = "Select the 4 fields, please..";
Toast.makeText(BusArrivalTime.this, message, Toast.LENGTH_SHORT).show();
}
试试这个
if (wilayat.getSelectedItemPosition() == 0 || city.getSelectedItemPosition() == 0 || station.getSelectedItemPosition() == 0 || distnation.getSelectedItemPosition() == 0) {
message = "Select the 4 fields, please..";
Toast.makeText(BusArrivalTime.this, message, Toast.LENGTH_SHORT).show();
}
只需使用getSelectedItemPosition()
方法
您确保wilayat
、city
等都是微调器
加上判断
if (wilayat != null || city != null || station != null || distnation != null) {
// do something
}
我想你要做的是检查任何旋转器是否为空,如果为空,则展示这片土司。这是你想要的吗?你能给我看一下详细的代码吗?@KeLiuyue:)我很乐意帮助你!