如何将我在EditText框中键入的数据添加到要在另一个活动中列出的数组中？

下面是我用于Android应用程序开发的3个java类.我想在AddActivity中添加学生数据(姓名和电话号码),点击"添加"后存储在MainActivity页面中.我已经研究过这个并尝试使用数组.但是我对于代码如何将AddActivity中键入的数据发送到MainActivity页面的逻辑非常困惑.任何人都可以给我一个如何解决这个问题的指导,如果你能用另一种方式向我展示我正在尝试的方式,我真的很感激.我希望在AddActivity页面中单击的每个"Add"之后,将数据以ListView格式存储在MainActivity中.我希望有人能指导我这样做.谢谢.

MainActivity.java - https://jsfiddle.net/eb1fprnn/

public class MainActivity extends AppCompatActivity {
ListView listView;
Button addStudent;
ArrayList students = new ArrayList();
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    add();
}



public void add() {
    Student student;
    addStudent = (Button) findViewById(R.id.add);
    addStudent.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(MainActivity.this, AddActivity.class);
            startActivity(intent);
        }
    });
}
}

AddActivity.java - https://jsfiddle.net/40k5mas2/

public class AddActivity extends AppCompatActivity {
EditText name, phone;
Button add;
int FphoneNumber;
String Fname;
ArrayList students;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Intent intent = getIntent();
    students = (ArrayList) getIntent().getSerializableExtra("AddNewStudent");
    setContentView(R.layout.activity_add);
    edit();
    addStudent();



}



public void edit() {
    name = (EditText) findViewById(R.id.StudentName);
    phOne= (EditText) findViewById(R.id.phone);
    final Button addStudent = (Button) findViewById(R.id.AddStudent);

    name.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            addStudent.setEnabled(!name.getText().toString().trim().isEmpty());
            Fname = name.getText().toString();

            String phOneNumber= phone.getText().toString();
            FphOneNumber= Integer.parseInt(phoneNumber);
        }

        @Override
        public void afterTextChanged(Editable s) {

        }


    });
}





public void addStudent() {

    add = (Button) findViewById(R.id.AddStudent);

    add.setOnClickListener(new View.OnClickListener() {
        @Override

        public void onClick(View v) {

            Intent intent = new Intent(AddActivity.this, MainActivity.class);
            intent.putExtra("studentName",name.getText().toString() );
            intent.putExtra("phoneNumber",phone.getText().toString());
            startActivity(intent);

            Student student = new Student(Fname, FphoneNumber);

            students.add(student);



        }
    });
}

public void addStudent(){
    add = (Button) findViewById(R.id.AddStudent);
    add.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(AddActivity.this,Record.class);
            startActivity(intent);
        }
    });

}

Student.java - https://jsfiddle.net/gy0g7b0s/

public class Student {

String mName;
int mPhoneNumber;


public Student (String name, int number){
    mName = name;
    mPhOneNumber= number;
};

public String getmName() {
  return mName;
}

public String getmName(String newName) {
    return (this.mName = newName);
}

public int getmPhoneNumber() {
    return this.mPhoneNumber;
}

public int getmPhoneNumber(int newPhoneNumber) {
    return (this.mPhOneNumber= newPhoneNumber);
}

@Override
public String toString() {
    return String.format("%s\t%f",this.mName, this.mPhoneNumber);
}

[1]:[主要活动页面图片] http://imgur.com/a/pMWt4

[2]:[添加活动页面的图片] http://imgur.com/a/8YvVc