這是ViewActivitypublic 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);    }}這是InputActivitypublic 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();顯示我的流程是在InputActivity中單擊保存按鈕時(shí)，它將在ViewActivity中運(yùn)行“添加人員”代碼，并將數(shù)據(jù)從表單添加到ArrayList。那是可行的，但是當(dāng)我使用意圖更改活動(dòng)并回到ViewActivity時(shí)，ArrayList數(shù)據(jù)消失了。我想要的是保留我已經(jīng)在InputActivity中輸入的所有值。希望你明白我的意思:)