java - 计算 recyclerView 中选中的复选框

Question

我在 recyclerView 中有一个复选框列表，其中 textView 也在那里。

➡我希望当我选中复选框时，每个复选框都应该计算自己的计数，并且在按下保存按钮后它应该将计数保存在另一个活动中当我再次选中复选框时，它应该在另一个中更新该计数活动。对于列表中的每个复选框，计数应该是单独的。

更新onBindViewHolder

 public void onBindViewHolder(@NonNull final StudentViewHolder holder, final int position) {

    final ListOfNames currentItems = mListOfNames.get(position);
    holder.studentName.setText(currentItems.getStudentName());
    holder.attendence.setText(currentItems.getTempAttendances());
    holder.mCheckedBox.setChecked(currentItems.getTemporaryChecked());

    holder.mCheckedBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int attendances=0 ;
            CheckBox checkBox = (CheckBox) v;
            currentItems.setTempChecked(checkBox.isChecked());
            if (checkBox.isChecked()) {
                attendances++;
            }
            currentItems.setTempAttendances(attendances);
        }

    });

}

模型类

public class ListOfNames {

private String studentName;

private boolean isChecked;
private transient boolean tempChecked;
private transient String  tempAttendances;
private String attandance;


@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public boolean equals(@Nullable Object obj) {
    if (obj instanceof ListOfNames) {
        ListOfNames other = (ListOfNames) obj;

        return Objects.equals(this.studentName, other.studentName);
    }
    return super.equals(obj);
}

public ListOfNames(String nStudentName) {
    studentName = nStudentName;

}

public String getStudentName() {
    return studentName;
}



public void setTempChecked(boolean checked) {
    tempChecked = checked;
}

public boolean getTemporaryChecked() {
    return tempChecked;
}

public void checkedToTempChecked() {
    tempChecked = isChecked;
}

public void tempCheckedToChecked() {
    isChecked = tempChecked;
}

public void setTempAttendances(int attendant) {
    tempAttendances = String.valueOf(attendant);
}

public String getTempAttendances() {
    return tempAttendances;
}

public void tempAttendanceToAttendance() {
    attandance = tempAttendances;
}

public void attendanceToTempAttendance() {
    tempAttendances = attandance;
}

}

标签： javaandroidcheckbox

Answer 1

首先我想说谢谢你帮助我解决了这个问题。我尝试了很多，最后我解决了。

我的菜单保存按钮

 case R.id.saveButton:

           //codes..

            for (ListOfNames current : listOfNames
            ) {

                current.tempCheckedToChecked();
                current.tempAttendanceToAttendance(); // using transient variable in my model class 
              //this method helps to setting temporary to default value.

            }
            saveData();
            saveAllData();

            Toast.makeText(this, "Saved!!", Toast.LENGTH_SHORT).show();
            return true;

}

onBindViewHolder

 public void onBindViewHolder(@NonNull final StudentViewHolder holder, final int position) {

    final ListOfNames currentItems = mListOfNames.get(position);

    holder.attendence.setText(currentItems.getTempAttendances());
    holder.mCheckedBox.setChecked(currentItems.getTemporaryChecked());

    holder.mCheckedBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            int tempAttendances = currentItems.getTempAttendances();

            CheckBox checkBox = (CheckBox) v;
            currentItems.setTempChecked(checkBox.isChecked());

            if (checkBox.isChecked()) {
               tempAttendances++;
            }
            currentItems.setTempAttendances(tempAttendances);
        }

    });

}

模型类

public class ListOfNames {

private String studentName;
private boolean isChecked;
private String OverallAttendce;
private transient boolean tempChecked;
private transient int  tempAttendances;
private int attendance;

public ListOfNames(String nStudentName) {
    studentName = nStudentName;
}


          //codes...

public void setTempAttendances(int attendant) {
    tempAttendances = (attendant);
}

public int getTempAttendances() {
    return tempAttendances;
}

public void tempAttendanceToAttendance() {
    attendance = tempAttendances;
}

public void attendanceToTempAttendance() {
    tempAttendances = attendance;
}

}

onBindViewHolder我正在检索学生列表出勤率的另一项活动...

  public void onBindViewHolder(@NonNull OverallAttendances_Adapter.thisViewHolder holder, int position) {

    ListOfNames currentItems = overallList.get(position);

    //Here I used attendance variable as of `String` type, because in my model class `tempAttendances` is of type `int`. that's why i coverted it into a String.

    String attendance = String.valueOf(currentItems.getTempAttendances());
    holder.stAttendances.setText(attendance);

}

这解决了我的问题..... :)