在一个活动的两个片段之间共享数据 [英] Sharing Data between two Fragments of of one Activity

问题描述

我有两个片段.一种用于数据输入，另一种用于在ListView中显示它们. 但是我不知道如何将数据从片段1发送到片段2 ...

Ive got two Fragments. One for data Input and one to display them in a ListView. But I dont know how to send data from Fragment 1 to Fragment 2...

我知道我可以使用以下代码将数据从MainActivity获取到片段1:

I know that I can get Data from my MainActivity to Fragment 1 with the following Code:

String listElement = getActivity().getIntent().getStringExtra("com.sample.MESSAGE");

但是如何将片段2中的字符串发送到我的活动中?

But how do I send the string from Fragment 2 to my Activity?

更新:我不太确定我是否正确地执行了此操作...我使用了Harlo Holmes教程(在下面发布)，但没有得到这个片段代码

UPDATE: I'm not quite sure if I'm doing this right... I used Harlo Holmes Tutorial (posted below) and not Ive got this Fragment Code

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Button;


    public class AddDataFragment extends Fragment {

        public interface OnDataPass {
            public void onDataPass(String data);
        }

        Button buttonadd;
        Button buttondelete;

        private EditText inputProduct;

        private TextView listElement;

        OnDataPass dataPasser;

        @Override
        public void onAttach(Context context){
            super.onAttach(context);

            Activity a;

            if (context instanceof Activity){
                a=(Activity) context;
            }
            dataPasser = (OnDataPass) context;
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,                                            Bundle savedInstanceState) {

            View view = inflater.inflate(R.layout.fragment_add_data, container, false);
            inputProduct = (EditText) view.findViewById(R.id.editText_product);
            buttonadd = (Button) view.findViewById(R.id.button_add_addData);
            buttondelete = (Button) view.findViewById(R.id.button_delete_addData);

            listElement = (TextView) view.findViewById(R.id.productTest);

            buttonadd.setEnabled(true);
            buttondelete.setEnabled(true);

            buttonadd.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    listElement.setText(getString(R.string.ListElementPlaceholder,                           inputProduct.getText()));
                }
                public void passData(String listElement){
                    dataPasser.onDataPass(listElement);
                }
            });

            return view;
        }


}

onAttach方法存在一些问题...这是正确的方法吗?

There where some issues with the onAttach method... Is this the right way?

推荐答案

可以使用 详细说明:

在片段与其容器活动之间传递数据

希望它会对您有所帮助.

Hope it will help you.

这篇关于在一个活动的两个片段之间共享数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！