如何将捆绑数据从一个片段获取到另一个片段？

Question

我有两个 fragments.addfragment 和控制片段。从 addfragment 我使用带有片段事务的 bundle 发送数据，然后在控制片段中，我想使用 bundle 获取该数据但我无法获取数据。所以请帮助我

这是我的片段交易的addfragment-

     relaylist.setAdapter(adapter);
relaylist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {


        HashMap<String, String> o = (HashMap<String, String>) relaylist.getItemAtPosition(position);



        Log.e("ip: ", "> " +  o.get("ip"));
        Log.e("port: ", "> " +  o.get("port"));
        Log.e("uname: ", "> " +  o.get("uname"));
        Log.e("password: ", "> " +  o.get("password"));


        ControlFragment fragment = new ControlFragment();
        FragmentTransaction transaction = getFragmentManager().beginTransaction();
        Bundle bundle = new Bundle();
        bundle.putString("ip", o.get("ip"));
        bundle.putString("port", o.get("port"));
        bundle.putString("uname", o.get("uname"));
        bundle.putString("password", o.get("password"));
        Log.e("ip: ", "> " +  o.get("ip"));
        Log.e("port: ", "> " +  o.get("port"));
        Log.e("uname: ", "> " +  o.get("uname"));
        Log.e("password: ", "> " +  o.get("password"));
        fragment.setArguments(bundle);
        transaction.replace(R.id.mainFrame, new ControlFragment() );

        transaction.commit();
    }
});

并且在控制片段中我以这种方式获取数据...但我无法获取数据

public class ControlFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView= inflater.inflate(R.layout.fragment_control, container, false);
        Bundle bundle = getArguments();

             String ip=bundle.getString("ip");
            Stirng port = bundle.getString("port");
            Stirng uname = bundle.getString("uname");
            Stirng password = bundle.getString("password");

Answer 1

使用这条线

捆绑包=getArguments();

在膨胀你的 rootview 之前

Answer 2

在 oncreate.Always 中的 oncreate view 之前获取数据在设置 data.Hope 之前做一个 null 检查错误这对你有帮助

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Bundle bundle = getArguments();
    if (bundle != null) {
        String ip = bundle.getString("ip");
        String port = bundle.getString("port");
        String uname = bundle.getString("uname");
        String password = bundle.getString("password");
    }
}

编辑:

正如 Amrish Kakadiya 指出的那样

transaction.replace(R.id.mainFrame, new ControlFragment());

这行代码产生了一个问题，new ControlFragment() 创建了一个全新的片段实例，因此您在检索时将 getArguments() 设为 null。

Answer 3

您正在设置构造函数而不是对象。使用下面的代码

ControlFragment fragment = new ControlFragment();
        FragmentTransaction transaction = getFragmentManager().beginTransaction();
        Bundle bundle = new Bundle();
        bundle.putString("ip", o.get("ip"));
        bundle.putString("port", o.get("port"));
        bundle.putString("uname", o.get("uname"));
        bundle.putString("password", o.get("password"));
        Log.e("ip: ", "> " +  o.get("ip"));
        Log.e("port: ", "> " +  o.get("port"));
        Log.e("uname: ", "> " +  o.get("uname"));
        Log.e("password: ", "> " +  o.get("password"));
        fragment.setArguments(bundle);
        transaction.replace(R.id.mainFrame, fragment  );

transaction.replace(R.id.mainFrame,片段);

这是变化。

如何将捆绑数据从一个片段获取到另一个片段？

How to get bundle data from one fragment to another fragment?

java

android

bundle

android-fragments