如何在Android中通过ArrayAdapter在ListView中单击单个ImageView后更改其背景？

我的片段活动中有一个ListView，它获取存储在内部存储器中的文件名。ListView还有一个ImageView，单击该视图时，会设置显示通知的警报。我希望单击时更改特定ImageView的背景。我的问题是，关闭应用程序后，ImageView的背景会恢复正常。那么，我应该如何更改已单击的每个ImageView的背景

这是我的片段类代码：

ListView listView;
CustomArrayAdapter arrayAdapter;
ArrayList<String> FilesInFolder;

FilesInFolder = GetFiles(getActivity().getFilesDir());

arrayAdapter = new CustomArrayAdapter(FilesInFolder, getContext());

Collections.sort(FilesInFolder);

listView.setAdapter(arrayAdapter);

public class CustomArrayAdapter extends ArrayAdapter<String> {

private ArrayList<String> list;
Context mContext;

TimePickerDialog timePickerDialog;
DatePickerDialog datePickerDialog;
int currentHour, currentMinute, currentYear, currentMonth, currentDay, currentDate;
int setHour, setMinute, setYear, setMonth, setDay;
Calendar calendar;

AlarmManager alarmManager;
PendingIntent pendingIntent;
public static final String NOTIFICATION_CHANNEL_ID = "10001" ;

public static class ViewHolder {
    TextView titleTextView;
    ImageView imageView;
}

public CustomArrayAdapter(ArrayList<String> list, Context context){
    super(context, R.layout.custom_listview, list);
    this.list = list;
    this.mContext = context;

    calendar = Calendar.getInstance();
    currentHour = calendar.get(Calendar.HOUR_OF_DAY);
    currentMinute = calendar.get(Calendar.MINUTE);

    currentYear = calendar.get(Calendar.YEAR);
    currentMonth = calendar.get(Calendar.MONTH);
    currentDay = calendar.get(Calendar.DAY_OF_MONTH);
    currentDate = calendar.get(Calendar.DATE);
}

public View getView(int position, View convertView, ViewGroup parent){
    String string = getItem(position);
    ViewHolder viewHolder;
    
    if (convertView == null){
        viewHolder = new ViewHolder();
        LayoutInflater inflater = LayoutInflater.from(getContext());
        convertView = inflater.inflate(R.layout.custom_listview, parent, false);
        viewHolder.imageView = convertView.findViewById(R.id.bellIcon);
        viewHolder.titleTextView = convertView.findViewById(R.id.textView);
        convertView.setTag(viewHolder);
        viewHolder = (ViewHolder) convertView.getTag();
    }
    else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

        ViewHolder finalViewHolder = viewHolder;
        viewHolder.imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (finalViewHolder.imageView.getTag() == "done") {
                    Snackbar.make(v, setHour + " " + setMinute + ", on" + " " + setDay + " " + setMonth + " " + setYear, Snackbar.LENGTH_LONG).show();
                } else {
                    timePickerDialog = new TimePickerDialog(getContext(), new TimePickerDialog.OnTimeSetListener() {
                        @Override
                        public void onTimeSet(TimePicker timePicker, final int hourOfDay, int minute) {
                            setHour = hourOfDay;
                            setMinute = minute;

                            datePickerDialog = new DatePickerDialog(getContext(), new DatePickerDialog.OnDateSetListener() {
                                @Override
                                public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                                    setYear = year;
                                    setMonth = month;
                                    setDay = dayOfMonth;

                                    Calendar setTime = Calendar.getInstance();
                                    setTime.set(setYear, setMonth, setDay, setHour, setMinute, 0);

                                    Date date = setTime.getTime();

                                    scheduleNotification(string, date.getTime());

                                    finalViewHolder.imageView.setImageResource(R.drawable.ic_baseline_notifications_active_24);
                                    finalViewHolder.imageView.setTag("done");

                                    Snackbar.make(v, "Reminder set for: " + string + "!", Snackbar.LENGTH_LONG)
                                            .setAnimationMode(BaseTransientBottomBar.ANIMATION_MODE_SLIDE)
                                            .show();
                                }
                            }, currentYear, currentMonth, currentDay);

                            datePickerDialog.show();
                        }
                    }, currentHour, currentMinute, false);

                    timePickerDialog.show();
                }
            }
        });

    viewHolder.titleTextView.setText(string);
    return convertView;
}

public void scheduleNotification (String fileName , long delay) {
    Intent notificationIntent = new Intent(this.mContext, MyBroadCastReceiver.class);
    notificationIntent.putExtra(MyBroadCastReceiver.NOTIFICATION_ID, (int)System.currentTimeMillis());
    notificationIntent.putExtra("title", fileName);

    pendingIntent = PendingIntent.getBroadcast(getContext(), (int)System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    alarmManager = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        alarmManager.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    } else {
        alarmManager.set(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    }
}

ListView-ListView；
CustomArrayAdapter arrayAdapter；
ArrayList文件信息文件夹；
fileinfolder=GetFiles（getActivity（）.getFilesDir（））；
arrayAdapter=newcustomarrayadapter（fileinfolder，getContext（））；
Collections.sort（fileinfolder）；
setAdapter（arrayAdapter）；

这是我的CustomArrayAdapter类：

ListView listView;
CustomArrayAdapter arrayAdapter;
ArrayList<String> FilesInFolder;

FilesInFolder = GetFiles(getActivity().getFilesDir());

arrayAdapter = new CustomArrayAdapter(FilesInFolder, getContext());

Collections.sort(FilesInFolder);

listView.setAdapter(arrayAdapter);

public class CustomArrayAdapter extends ArrayAdapter<String> {

private ArrayList<String> list;
Context mContext;

TimePickerDialog timePickerDialog;
DatePickerDialog datePickerDialog;
int currentHour, currentMinute, currentYear, currentMonth, currentDay, currentDate;
int setHour, setMinute, setYear, setMonth, setDay;
Calendar calendar;

AlarmManager alarmManager;
PendingIntent pendingIntent;
public static final String NOTIFICATION_CHANNEL_ID = "10001" ;

public static class ViewHolder {
    TextView titleTextView;
    ImageView imageView;
}

public CustomArrayAdapter(ArrayList<String> list, Context context){
    super(context, R.layout.custom_listview, list);
    this.list = list;
    this.mContext = context;

    calendar = Calendar.getInstance();
    currentHour = calendar.get(Calendar.HOUR_OF_DAY);
    currentMinute = calendar.get(Calendar.MINUTE);

    currentYear = calendar.get(Calendar.YEAR);
    currentMonth = calendar.get(Calendar.MONTH);
    currentDay = calendar.get(Calendar.DAY_OF_MONTH);
    currentDate = calendar.get(Calendar.DATE);
}

public View getView(int position, View convertView, ViewGroup parent){
    String string = getItem(position);
    ViewHolder viewHolder;
    
    if (convertView == null){
        viewHolder = new ViewHolder();
        LayoutInflater inflater = LayoutInflater.from(getContext());
        convertView = inflater.inflate(R.layout.custom_listview, parent, false);
        viewHolder.imageView = convertView.findViewById(R.id.bellIcon);
        viewHolder.titleTextView = convertView.findViewById(R.id.textView);
        convertView.setTag(viewHolder);
        viewHolder = (ViewHolder) convertView.getTag();
    }
    else {
        viewHolder = (ViewHolder) convertView.getTag();
    }

        ViewHolder finalViewHolder = viewHolder;
        viewHolder.imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (finalViewHolder.imageView.getTag() == "done") {
                    Snackbar.make(v, setHour + " " + setMinute + ", on" + " " + setDay + " " + setMonth + " " + setYear, Snackbar.LENGTH_LONG).show();
                } else {
                    timePickerDialog = new TimePickerDialog(getContext(), new TimePickerDialog.OnTimeSetListener() {
                        @Override
                        public void onTimeSet(TimePicker timePicker, final int hourOfDay, int minute) {
                            setHour = hourOfDay;
                            setMinute = minute;

                            datePickerDialog = new DatePickerDialog(getContext(), new DatePickerDialog.OnDateSetListener() {
                                @Override
                                public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                                    setYear = year;
                                    setMonth = month;
                                    setDay = dayOfMonth;

                                    Calendar setTime = Calendar.getInstance();
                                    setTime.set(setYear, setMonth, setDay, setHour, setMinute, 0);

                                    Date date = setTime.getTime();

                                    scheduleNotification(string, date.getTime());

                                    finalViewHolder.imageView.setImageResource(R.drawable.ic_baseline_notifications_active_24);
                                    finalViewHolder.imageView.setTag("done");

                                    Snackbar.make(v, "Reminder set for: " + string + "!", Snackbar.LENGTH_LONG)
                                            .setAnimationMode(BaseTransientBottomBar.ANIMATION_MODE_SLIDE)
                                            .show();
                                }
                            }, currentYear, currentMonth, currentDay);

                            datePickerDialog.show();
                        }
                    }, currentHour, currentMinute, false);

                    timePickerDialog.show();
                }
            }
        });

    viewHolder.titleTextView.setText(string);
    return convertView;
}

public void scheduleNotification (String fileName , long delay) {
    Intent notificationIntent = new Intent(this.mContext, MyBroadCastReceiver.class);
    notificationIntent.putExtra(MyBroadCastReceiver.NOTIFICATION_ID, (int)System.currentTimeMillis());
    notificationIntent.putExtra("title", fileName);

    pendingIntent = PendingIntent.getBroadcast(getContext(), (int)System.currentTimeMillis(), notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    alarmManager = (AlarmManager) getContext().getSystemService(Context.ALARM_SERVICE);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        alarmManager.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        alarmManager.setExact(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    } else {
        alarmManager.set(AlarmManager.RTC_WAKEUP, delay, pendingIntent);
    }
}

公共类CustomArrayAdapter扩展了ArrayAdapter{
私有数组列表；
语境；
TimePickerDialog TimePickerDialog；
DatePickerDialog DatePickerDialog；
int currentHour、currentMinute、currentYear、currentMonth、currentDay、currentDate；
int setHour、setMinute、setYear、setMonth、setDay；
日历；
AlarmManager AlarmManager；
下垂的下垂的；
公共静态最终字符串通知\u通道\u ID=“10001”；
公共静态类视图持有者{
text视图titleTextView；
图像视图图像视图；
}
公共CustomArrayAdapter（ArrayList列表，上下文）{
super（context，R.layout.custom_listview，list）；
this.list=列表；
this.mContext=上下文；
calendar=calendar.getInstance（）；
currentHour=calendar.get（calendar.HOUR，共天）；
currentMinute=calendar.get（calendar.MINUTE）；
currentYear=calendar.get（calendar.YEAR）；
currentMonth=calendar.get（calendar.MONTH）；
currentDay=calendar.get（calendar.DAY\u/u月）；
currentDate=calendar.get（calendar.DATE）；
}
公共视图getView（int位置、视图转换视图、视图组父视图）{
String=getItem（位置）；
持票人持票人；
if（convertView==null）{
viewHolder=新的viewHolder（）；
LayoutInflater充气器=LayoutInflater.from（getContext（））；
convertView=充气机。充气（R.layout.custom_listview，父项，false）；
viewHolder.imageView=convertView.findViewById（R.id.bellIcon）；
viewHolder.titleTextView=convertView.findViewById（R.id.textView）；
convertView.setTag（viewHolder）；
viewHolder=（viewHolder）convertView.getTag（）；
}
否则{
viewHolder=（viewHolder）convertView.getTag（）；
}
ViewHolder finalViewHolder=ViewHolder；
viewHolder.imageView.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
if（finalViewHolder.imageView.getTag（）=“完成”）{
Snackbar.make（v，setHour+“”+setMinute+“”，on“+“”+setDay+“”+setMonth+“”+setYear，Snackbar.LENGTH_LONG）。show（）；
}否则{
timePickerDialog=new timePickerDialog（getContext（），new timePickerDialog.OnTimeSetListener（））{
@凌驾
时间集上的公共void（时间选择器时间选择器，最终整数小时日，整数分钟）{
设置小时=小时/天；
设置分钟=分钟；
datePickerDialog=new datePickerDialog（getContext（），new datePickerDialog.OnDateSetListener（））{
@凌驾
public void onDateSet（日期选择器视图，整数年，整数月，整数天月）{
setYear=年；
setMonth=月；
setDay=每月的第几天；
Calendar setTime=Calendar.getInstance（）；
设置时间（设置年、设置月、设置日、设置小时、设置分钟、0）；
Date-Date=setTime.getTime（）；
scheduleNotification（字符串，date.getTime（））；
finalView.imageView.setImageResource（R.drawable.ic_基线_通知_活动_24）；
finalViewHolder.imageView.setTag（“完成”）；
Snackbar.make（v，“提醒设置为：“+字符串+”！”，Snackbar.LENGTH\u LONG）
.setAnimationMode（BaseTransientBottomBar.ANIMATION\u MODE\u幻灯片）
.show（）；
}
}，当前年，当前月，当前日）；
datePickerDialog.show（）；
}
}，currentHour，currentMinute，false）；
timePickerDialog.show（）；
}
}
});
viewHolder.titleTextView.setText（字符串）；
返回视图；
}
公共无效计划通知（字符串文件名，长延迟）{
Intent notificationIntent=新的Intent（this.mContext，MyBroadCastReceiver.class）；
notificationIntent.putExtra（MyBroadCastReceiver.NOTIFICATION_ID，（int）System.currentTimeMillis（））；
notificationIntent.putExtra（“标题”，文件名）；
PendingEvent=PendingEvent.getBroadcast（getContext（），（int）System.currentTimeMillis（），notificationIntent，PendingEvent.FLAG_UPDATE_CURRENT）；
alarmManager=（alarmManager）getContext（）.getSystemService（Context.ALARM_服务）；
if（Build.VERSION.SDK\u INT>=Build.VERSION\u code.M）{
alarmManager.setAndAllowHileId（alarmManager.RTC_唤醒、延迟、挂起）；
}else if（Build.VERSION.SDK\u INT>=Build.VERSION\u code.KITKAT）{
alarmManager.setExact（alarmManager.RTC_唤醒、延迟、挂起）；
}否则{
alarmManager.set（alarmManager