我有一系列微调器，它们都显示相同的数组。但是，我想区分每个微调器的选择，并能够分别读取每个微调器。我尝试使用if语句和System.out.println(parent.getItemAtPosition(position));来获取所选项目，但是我的所有打印语句都无法正常工作！我想我做错了什么，并认为我会发表以获取一些反馈意见：）
我担心的部分
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Spinner spinner=(Spinner) parent;
System.out.println(parent.getItemAtPosition(position));
if(spinner.getId()==R.id.spinnerExercise1){
System.out.println(parent.getItemAtPosition(position));
}
else if(spinner.getId()==R.id.spinnerExercise2){
}
else if(spinner.getId()==R.id.spinnerExercise3){
}
else if(spinner.getId()==R.id.spinnerExercise4){
}
else if(spinner.getId()==R.id.spinnerExercise5){
}
else if(spinner.getId()==R.id.spinnerExercise6){
}
else if(spinner.getId()==R.id.spinnerExercise7){
}
else if(spinner.getId()==R.id.spinnerExercise8){
}
else if(spinner.getId()==R.id.spinnerExercise9){
}
else if(spinner.getId()==R.id.spinnerExercise10){
}
else if(spinner.getId()==R.id.spinnerExercise11){
}
else if(spinner.getId()==R.id.spinnerExercise12){
}
else if(spinner.getId()==R.id.spinnerExercise13){
}
else if(spinner.getId()==R.id.spinnerExercise14){
}
else if(spinner.getId()==R.id.spinnerExercise15){
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
整个班级（如果有必要了解摘要）
package com.example.workoutapp;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.PopupMenu;
import android.widget.Spinner;
import android.widget.Toast;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.List;
public class WorkoutsCreater extends AppCompatActivity implements PopupMenu.OnMenuItemClickListener, AdapterView.OnItemSelectedListener {
public void ArrayToSpinner(List<String> array, Spinner spinner){
ArrayAdapter<String> adapter = new ArrayAdapter<>(this,android.R.layout.simple_dropdown_item_1line,array);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_workouts_creater);
ActionBar actionBar = getSupportActionBar();
actionBar.setTitle("Workout Creater"); //change text at top of screen accordingly
Button btn=findViewById(R.id.BtnNew);
btn.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
PopupMenu popup = new PopupMenu(WorkoutsCreater.this, v); //display menu when button clicked
v.setOnTouchListener(popup.getDragToOpenListener());
popup.setOnMenuItemClickListener(WorkoutsCreater.this);
popup.inflate(R.menu.workout_new_popup_menu);
setForceShowIcon(popup);
popup.show(); //show popup
}
});
List<String> workoutArray= spinnerArray.workoutArray;
Spinner spinner1 = findViewById(R.id.spinnerExercise1);
Spinner spinner2 = findViewById(R.id.spinnerExercise2);
Spinner spinner3 = findViewById(R.id.spinnerExercise3);
Spinner spinner4 = findViewById(R.id.spinnerExercise4);
Spinner spinner5 = findViewById(R.id.spinnerExercise5);
Spinner spinner6 = findViewById(R.id.spinnerExercise6);
Spinner spinner7 = findViewById(R.id.spinnerExercise7);
Spinner spinner8 = findViewById(R.id.spinnerExercise8);
Spinner spinner9 = findViewById(R.id.spinnerExercise9);
Spinner spinner10 = findViewById(R.id.spinnerExercise10);
Spinner spinner11 = findViewById(R.id.spinnerExercise11);
Spinner spinner12= findViewById(R.id.spinnerExercise12);
Spinner spinner13 = findViewById(R.id.spinnerExercise13);
Spinner spinner14 = findViewById(R.id.spinnerExercise14);
Spinner spinner15 = findViewById(R.id.spinnerExercise15);
ArrayToSpinner(workoutArray, spinner1);
ArrayToSpinner(workoutArray, spinner2);
ArrayToSpinner(workoutArray, spinner3);
ArrayToSpinner(workoutArray, spinner4);
ArrayToSpinner(workoutArray, spinner5);
ArrayToSpinner(workoutArray, spinner6);
ArrayToSpinner(workoutArray, spinner7);
ArrayToSpinner(workoutArray, spinner8);
ArrayToSpinner(workoutArray, spinner9);
ArrayToSpinner(workoutArray, spinner10);
ArrayToSpinner(workoutArray, spinner11);
ArrayToSpinner(workoutArray, spinner12);
ArrayToSpinner(workoutArray, spinner13);
ArrayToSpinner(workoutArray, spinner14);
ArrayToSpinner(workoutArray, spinner15);
}
@Override
public boolean onMenuItemClick(MenuItem item) {
Toast.makeText(this, "Selected Item: " +item.getTitle(), Toast.LENGTH_SHORT).show();
switch (item.getItemId()) { //testing which button is pressed in menu
case R.id.RepBased:
System.out.println("Rep Based");
return true;
case R.id.RunBased:
System.out.println("Run Based");
return true;
case R.id.TimeBased:
System.out.println("Time Based");
return true;
default:
return false;
}
}
public static void setForceShowIcon(PopupMenu popupMenu) { //function to show icons on popup menu
try {
Field[] fields = popupMenu.getClass().getDeclaredFields();
for (Field field : fields) {
if ("mPopup".equals(field.getName())) {
field.setAccessible(true);
Object menuPopupHelper = field.get(popupMenu);
Class<?> classPopupHelper = Class.forName(menuPopupHelper
.getClass().getName());
Method setForceIcons = classPopupHelper.getMethod(
"setForceShowIcon", boolean.class);
setForceIcons.invoke(menuPopupHelper, true);
break;
}
}
} catch (Throwable e) {
e.printStackTrace();
}
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
Spinner spinner=(Spinner) parent;
System.out.println(parent.getItemAtPosition(position));
if(spinner.getId()==R.id.spinnerExercise1){
System.out.println(parent.getItemAtPosition(position));
}
else if(spinner.getId()==R.id.spinnerExercise2){
}
else if(spinner.getId()==R.id.spinnerExercise3){
}
else if(spinner.getId()==R.id.spinnerExercise4){
}
else if(spinner.getId()==R.id.spinnerExercise5){
}
else if(spinner.getId()==R.id.spinnerExercise6){
}
else if(spinner.getId()==R.id.spinnerExercise7){
}
else if(spinner.getId()==R.id.spinnerExercise8){
}
else if(spinner.getId()==R.id.spinnerExercise9){
}
else if(spinner.getId()==R.id.spinnerExercise10){
}
else if(spinner.getId()==R.id.spinnerExercise11){
}
else if(spinner.getId()==R.id.spinnerExercise12){
}
else if(spinner.getId()==R.id.spinnerExercise13){
}
else if(spinner.getId()==R.id.spinnerExercise14){
}
else if(spinner.getId()==R.id.spinnerExercise15){
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
您未将监听器添加到微调器中
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
// your code here
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
对于每个微调器，您必须添加此行
spinner.setOnItemSelectedListener(this)