Невозможно запустить вторую активность с помощью «startActivityForResult»

Question

То же, что и название: я уже пробовал с «startActivity», но тот же результат. Когда я нажимаю кнопку fab, она показывает HomeActivity. Надеюсь, вы можете мне помочь.

Хотите отправить список человека здесь

Главная Активность:

public class HomeActivity extends AppCompatActivity { 

private RecyclerView mRecyclerView; 
private RecyclerView.Adapter mAdapter; 
private RecyclerView.LayoutManager mLayoutManager; 
public ArrayList result = new ArrayList(); 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    super.onActivityResult(requestCode, resultCode, data); 
    if(requestCode == 0 && resultCode == RESULT_OK && data!=null){ 
     result = data.getParcelableArrayListExtra("list_modified"); 
    } 
} 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_home); 
    FloatingActionButton fab = (FloatingActionButton)findViewById(R.id.fab); 
    Toolbar toolbar = (Toolbar)findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 
    mRecyclerView = (RecyclerView) findViewById(R.id.rv); 

    // use this setting to improve performance if you know that changes 
    // in content do not change the layout size of the RecyclerView 
    mRecyclerView.setHasFixedSize(true); 
    mRecyclerView.setItemAnimator(new ScaleInBottomAnimator()); 

    // use a linear layout manager 
    mLayoutManager = new LinearLayoutManager(this); 
    mRecyclerView.setLayoutManager(mLayoutManager); 

    // specify an adapter (see also next example) 
    mAdapter = new MyAdapter(createList(0)); 
    mRecyclerView.setAdapter(mAdapter); 
    fab.attachToRecyclerView(mRecyclerView); 
    fab.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent i = new Intent(HomeActivity.this, CreateNewPerson.class); 
      i.putExtra("list", result); 
      startActivityForResult(i, 0); 
      mAdapter.notifyDataSetChanged(); 
     } 
    }); 


} 
private List createList(int size) { 

    for (int i=1; i <= size; i++) { 
     Person p = new Person("Name"+ i, "Surname" + i, R.drawable.ic_action_account_box); 
     result.add(p); 
    } 
    return result; 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_home, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

сюда, изменить его и попытаться освежить RecyclerView с новым человеком в него.

SecondActivity:

public class CreateNewPerson extends AppCompatActivity { 
EditText e1; 
EditText e2; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.new_person); 
    Bundle extra= getIntent().getExtras(); 
    ArrayList<Person> list = (ArrayList) extra.getParcelableArrayList("list"); 
    e1 = (EditText)findViewById(R.id.editName); 
    e2 = (EditText)findViewById(R.id.editSurname); 
    Person p = new Person(e1.toString(), e2.toString(), R.drawable.ic_action_account_box); 
    list.add(p); 
    Intent output = new Intent(); 
    output.putExtra("list_modified", list); 
    setResult(RESULT_OK, output); 
    finish(); 

} 

} 

Answer 1

Заменить второй код активности с этим

public class CreateNewPerson extends AppCompatActivity { 
EditText e1; 
EditText e2; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.new_person); 
    Bundle extra= getIntent().getExtras(); 
    ArrayList<Person> list = (ArrayList) extra.getParcelableArrayList("list"); 
    e1 = (EditText)findViewById(R.id.editName); 
    e2 = (EditText)findViewById(R.id.editSurname); 
    Person p = new Person(e1.toString(), e2.toString(), R.drawable.ic_action_account_box); 
    list.add(p); 
    Intent output = new Intent(); 
    output.putExtra("list_modified", list); 
    setResult(RESULT_OK, output); 
} 

}