在Android中更改活动时如何保持ArrayList值

Question

这是ViewActivity

public class ViewActivity extends AppCompatActivity {

    private ListView lvPerson;

    private PersonListAdapter adapter;

    public List<Person> mPersonList = new ArrayList<>();

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_view);

        lvPerson = (ListView)findViewById(R.id.listView);

        //Add new person

        Intent intent = getIntent();

        if(intent.hasExtra("add")){

            String name = intent.getStringExtra("name");

            String email = intent.getStringExtra("email");

            String address = intent.getStringExtra("address");

            mPersonList.add(new Person(name, email, address));

            Toast.makeText(getApplicationContext(), "Data berhasil ditambahkan", Toast.LENGTH_SHORT).show();

        }

        //Init adapter

        adapter = new PersonListAdapter(getApplicationContext(), mPersonList);

        lvPerson.setAdapter(adapter);

    }

}

这是InputActivity

public class InputActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_input);

    }

    public void saveButtonClicked(View view){

        EditText name = (EditText) findViewById(R.id.editTextName);

        EditText email = (EditText) findViewById(R.id.editTextEmail);

        EditText address = (EditText) findViewById(R.id.editTextAddress);

        String strName = name.getText().toString();

        String strEmail = email.getText().toString();

        String strAddress = address.getText().toString();

显示我的流程是在InputActivity中单击保存按钮时，它将在ViewActivity中运行“添加人员”代码，并将数据从表单添加到ArrayList。

那是可行的，但是当我使用意图更改活动并回到ViewActivity时，ArrayList数据消失了。

我想要的是保留我已经在InputActivity中输入的所有值。

希望你明白我的意思:)