Android 正在将捆绑包从主活动发送到片段

我遵循了谷歌教程，代码中没有任何错误，但由于某种原因，我的包中的数据似乎没有从我的主要活动发送到我的片段（我的应用程序只是不断返回“0.00”）。请帮忙

主要活动：

@Override
public void assignButtonBWHW1Clicked(String assignButtonBWHWClicked) {

    if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) {

        assignFragment1 = new assignFragment1();
        buttonsGeneric = new genericBackNextFragment();

        splitItFragmentManager3 = getFragmentManager();
        splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction();
        splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1);

        splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric);
        splitItFragmentTransaction3.addToBackStack(null);

        splitItFragmentTransaction3.commit();

        Bundle bundleAssign = new Bundle();
        bundleAssign.putDouble("price1", 22);
        assignFragment1.setArguments(bundleAssign);

    }
}

片段：

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

    assignFragment1View = inflater.inflate(R.layout.assign_fragment_1, container, false);

    item1 = (TextView) assignFragment1View.findViewById(R.id.assign1_food_item_1);
    item2 = (TextView) assignFragment1View.findViewById(R.id.assign1_food_item_2);
    priceItem1 = (TextView) assignFragment1View.findViewById(R.id.assign1_price_item_1);
    priceItem2 = (TextView) assignFragment1View.findViewById(R.id.assign1_price_item_2);

    Bundle bundleAssign = this.getArguments();
    Double price1Double = bundleAssign.getDouble("priceItem1", 0.00);
    priceItem1.setText(String.valueOf(price1Double));

    return assignFragment1View;
}

试一试

或者，

Bundle bundleASign=getActivity（）.getArguments（）

而不是

Bundle bundleAssign = this.getArguments();

获得价值就像

double result = bundleAssign.getDouble("price1");

---

在获得fragment nmanager之前，请尝试将捆绑初始化放置到fragment

if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) {

    assignFragment1 = new assignFragment1();
    buttonsGeneric = new genericBackNextFragment();

    Bundle bundleAssign = new Bundle();
    bundleAssign.putDouble("price1", 22);
    assignFragment1.setArguments(bundleAssign);

    splitItFragmentManager3 = getFragmentManager();
    splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction();
    splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1);

    splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric);
    splitItFragmentTransaction3.addToBackStack(null);

    splitItFragmentTransaction3.commit();

}

---

只需将

片段

侧的

键

从

priceItem1

更新为

price1

Double price1Double = bundleAssign.getDouble("priceItem1", 0.00);

到

---

这是因为在将数据添加到bundle和使用不同的键进行检索时，您使用的是单独的键。因此，它将返回

默认值

，即

0.00

，对于

priceItem1

键

，您必须在代码中进行两次更改。
第一次更改是在事务之前设置参数

if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) {

        assignFragment1 = new assignFragment1();
        Bundle bundleAssign = new Bundle();
        bundleAssign.putDouble("price1", 22);
        assignFragment1.setArguments(bundleAssign);
        buttonsGeneric = new genericBackNextFragment();

        splitItFragmentManager3 = getFragmentManager();
        splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction();
        splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1);

        splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric);
        splitItFragmentTransaction3.addToBackStack(null);

        splitItFragmentTransaction3.commit();



    }

第二种方法总是使用相同的键来设置和检索包中的数据，以便在片段中进行更改

  Double price1Double = bundleAssign.getDouble("priceItem1", 0.00);

到

---

非常感谢！这就解决了问题。令人惊讶的是，你竟然能把自己的代码看一百遍，却没有发现这么明显的东西。很好，它修复了，如果有帮助的话就接受它：）这样它就可以从未回答的问题队列中清除：）非常感谢。在我的例子中，我没有调用

assignFragment1.setArguments（bundleAssign）（请注意：在你的答案中加粗，因为这是你的答案与网络上任何其他naswer的主要区别）。再次感谢
if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) {

        assignFragment1 = new assignFragment1();
        Bundle bundleAssign = new Bundle();
        bundleAssign.putDouble("price1", 22);
        assignFragment1.setArguments(bundleAssign);
        buttonsGeneric = new genericBackNextFragment();

        splitItFragmentManager3 = getFragmentManager();
        splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction();
        splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1);

        splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric);
        splitItFragmentTransaction3.addToBackStack(null);

        splitItFragmentTransaction3.commit();



    }

  Double price1Double = bundleAssign.getDouble("priceItem1", 0.00);

  Double price1Double = bundleAssign.getDouble("price1", 0.00);