Java 字符串不';当传递到不同的片段时是否更新?
我试图将两个字符串从片段A发送到片段B。目前,我已经实现了一个Java 字符串不';当传递到不同的片段时是否更新?,java,android,android-fragments,Java,Android,Android Fragments,我试图将两个字符串从片段A发送到片段B。目前,我已经实现了一个接口侦听器,如下所示 方法片段: String arrayTitle1 = arrayList.get(Index).get("ArrayTitle1"); String arrayTitle2 = arrayList.get(Index).get("ArrayTitle2"); ((TextFooterListener) getActivity()).onTextFooterListener(arrayTitle1, arrayT
接口
侦听器,如下所示
方法片段:
String arrayTitle1 = arrayList.get(Index).get("ArrayTitle1");
String arrayTitle2 = arrayList.get(Index).get("ArrayTitle2");
((TextFooterListener) getActivity()).onTextFooterListener(arrayTitle1, arrayTitle2);
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
FragmentB.arrayTitle1 = arrayTitle1;
FragmentB.arrayTitle2 = arrayTitle2;
}
我将这些字符串传递给活动,活动将它们发送到片段B,如下所示
活动:
String arrayTitle1 = arrayList.get(Index).get("ArrayTitle1");
String arrayTitle2 = arrayList.get(Index).get("ArrayTitle2");
((TextFooterListener) getActivity()).onTextFooterListener(arrayTitle1, arrayTitle2);
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
FragmentB.arrayTitle1 = arrayTitle1;
FragmentB.arrayTitle2 = arrayTitle2;
}
片段B:
String arrayTitle1 = arrayList.get(Index).get("ArrayTitle1");
String arrayTitle2 = arrayList.get(Index).get("ArrayTitle2");
((TextFooterListener) getActivity()).onTextFooterListener(arrayTitle1, arrayTitle2);
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
FragmentB.arrayTitle1 = arrayTitle1;
FragmentB.arrayTitle2 = arrayTitle2;
}
然后它们被接收并作为公共字符串存储在片段B中
public String arrayTitle1;
public String arrayTitle2;
在片段B的onCreateView
中,我尝试分配这些字符串
arrayTitle1Footer.setText(arrayTitle1);
arrayTitle2Footer.setText(arrayTitle2);
但不幸的是,每当调用片段A的方法时,onTextFooterListener
似乎不会更新字符串
有什么建议吗?您更改了片段B中的值,但从未实际将新值重新分配到文本视图中 改变
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
FragmentB.setTitles(arrayTitle1, arrayTitle2);
}
在片段B中:
public void setTitles(String title1, String title2) {
arrayTitle1 = title1;
arrayTitle2 = title2;
arrayTitle1Footer.setText(arrayTitle1);
arrayTitle2Footer.setText(arrayTitle2);
}
您更改片段B中的值,但从未实际将新值重新分配到TextView中 改变
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
FragmentB.setTitles(arrayTitle1, arrayTitle2);
}
在片段B中:
public void setTitles(String title1, String title2) {
arrayTitle1 = title1;
arrayTitle2 = title2;
arrayTitle1Footer.setText(arrayTitle1);
arrayTitle2Footer.setText(arrayTitle2);
}
您需要使用一种机制将数据传递给片段。请考虑以下方法:
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
Bundle data = new Bundle();
data.putString("array1", arrayTitle1);
data.putString("array2", arrayTitle2);
FragmentB b = FragmentB();
b.setArguments(data);
}
然后在片段b的onCreateView
中:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
arrayTitle1 = getArguments().getString("array1");
arrayTitle2 = getArguments().getString("array2");
arrayTitle1Footer.setText(arrayTitle1);
arrayTitle2Footer.setText(arrayTitle2);
return inflater.inflate(R.layout.fragment, container, false);
}
您需要使用一种机制将数据传递给片段。请考虑以下方法:
@Override
public void onTextFooterListener(String arrayTitle1, String arrayTitle2) {
Bundle data = new Bundle();
data.putString("array1", arrayTitle1);
data.putString("array2", arrayTitle2);
FragmentB b = FragmentB();
b.setArguments(data);
}
然后在片段b的onCreateView
中:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
arrayTitle1 = getArguments().getString("array1");
arrayTitle2 = getArguments().getString("array2");
arrayTitle1Footer.setText(arrayTitle1);
arrayTitle2Footer.setText(arrayTitle2);
return inflater.inflate(R.layout.fragment, container, false);
}