在片段和活动之间传递数据的最聪明的方法是创建一个变量，例如:

class StorageUtil {
  public static ArrayList<Employee> employees;
}

然后通过onActivityCreated方法将数据从fragment传递给activity:

//a field created in the sending fragment
ArrayList<Employee> employees;

@Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
         employees=new ArrayList();

       //java 7 and above syntax for arraylist else use employees=new ArrayList<Employee>() for java 6 and below

     //Adding first employee
        Employee employee=new Employee("1","Andrew","Sam","1984-04-10","Male","Ghanaian");
        employees.add(employee);

      //Adding second employee
       Employee employee=new Employee("1","Akuah","Morrison","1984-02-04","Female","Ghanaian");
         employees.add(employee);

        StorageUtil.employees=employees;
    }

现在您可以获得StorageUtil的值。来自各地的员工。 古德勒克!

最好和最方便的方法是调用片段实例并发送数据。 每个片段默认都有实例方法

例如: 如果你的片段名称是MyFragment

所以你会像这样调用你的fragment from activity:

getSupportFragmentManager().beginTransaction().add(R.id.container, MyFragment.newInstance("data1","data2"),"MyFragment").commit();

* R.id。container是我的框架布局的id

所以在MyFragment.newInstance("data1"，"data2")你可以发送数据到fragment，在你的fragment你得到这个数据在MyFragment newInstance(String param1, String param2)

public static MyFragment newInstance(String param1, String param2) {
        MyFragment fragment = new MyFragment();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

然后在fragment的onCreate方法中，你会得到数据:

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

现在mParam1有data1 mParam2有data2 现在你可以在你的片段中使用这个mParam1和mParam2。

在片段和活动之间传递数据的最聪明的方法是创建一个变量，例如:

class StorageUtil {
  public static ArrayList<Employee> employees;
}

然后通过onActivityCreated方法将数据从fragment传递给activity:

//a field created in the sending fragment
ArrayList<Employee> employees;

@Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
         employees=new ArrayList();

       //java 7 and above syntax for arraylist else use employees=new ArrayList<Employee>() for java 6 and below

     //Adding first employee
        Employee employee=new Employee("1","Andrew","Sam","1984-04-10","Male","Ghanaian");
        employees.add(employee);

      //Adding second employee
       Employee employee=new Employee("1","Akuah","Morrison","1984-02-04","Female","Ghanaian");
         employees.add(employee);

        StorageUtil.employees=employees;
    }

现在您可以获得StorageUtil的值。来自各地的员工。 古德勒克!

我在这里@ stackoverflow.com找到了很多答案，但这绝对是正确的答案:

“发送数据从活动碎片在android”。

活动:

        Bundle bundle = new Bundle();
        String myMessage = "Stackoverflow is cool!";
        bundle.putString("message", myMessage );
        FragmentClass fragInfo = new FragmentClass();
        fragInfo.setArguments(bundle);
        transaction.replace(R.id.fragment_single, fragInfo);
        transaction.commit();

片段:

读取片段中的值

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Bundle bundle = this.getArguments();
        String myValue = bundle.getString("message");
        ...
        ...
        ...
        }

或者只是

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        String myValue = this.getArguments().getString("message");
        ...
        ...
        ...
        }

从Activity中发送数据，意图如下:

Bundle bundle = new Bundle();
bundle.putString("edttext", "From Activity");
// set Fragmentclass Arguments
Fragmentclass fragobj = new Fragmentclass();
fragobj.setArguments(bundle);

在Fragment的onCreateView方法中:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    String strtext = getArguments().getString("edttext");    
    return inflater.inflate(R.layout.fragment, container, false);
}

芬兰湾的科特林版:

在活动:

val bundle = Bundle()
bundle.putBoolean("YourKey1", true)
bundle.putString("YourKey2", "YourString")

val fragment = YourFragment()
fragment.arguments = bundle
val fragmentTransaction = parentFragmentManager.beginTransaction()
fragmentTransaction.replace(R.id.your_container, fragment, fragment.toString())
fragmentTransaction.commit()

在onCreate()片段中:

var value1 = arguments?.getBoolean("YourKey1", default true/false)
var value2 = arguments?.getString("YourKey2", "Default String")