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现在我有2个不同的活动,称为MainControl(带有3个片段)和MainControl2(带有2个片段)。我想要将MainControl中1st片段的变量传递给MainControl2中的1st片段。Android如何通过意图在2个不同活动之间传递2个片段之间的变量
以下是我使用来实现这个代码: -
MainControl 1片段
@Override
public void openPostDescription(Data2 data2) {
Intent intent = new Intent(getActivity(), MainControl2.class);
intent.putExtra("title", data2.getTitle());
intent.putExtra("comment", data2.getNumComments());
intent.putExtra("domain", data2.getDomain());
intent.putExtra("author", data2.getAuthor());
intent.putExtra("image", data2.getUrl());
intent.putExtra("score", data2.getScore());
intent.putExtra("ups", data2.getUps());
startActivity(intent);
}
MainControl2.java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_control2);
Bundle bundle = getIntent().getExtras();
PostDescription postDescription = new PostDescription();
postDescription.setArguments(bundle);
toolbar = (Toolbar)findViewById(R.id.mainControl2Toolbar);
setSupportActionBar(toolbar);
tabLayout = (TabLayout)findViewById(R.id.mainControl2TabLayout);
viewPager = (ViewPager)findViewById(R.id.mainControl2ViewPager);
viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
viewPagerAdapter.addFragments(new PostDescription(), "DESCRIPTION");
viewPagerAdapter.addFragments(new PostComments(), "COMMENT");
viewPager.setAdapter(viewPagerAdapter);
tabLayout.setupWithViewPager(viewPager);
}
MainControl2 1片段
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_post_description, container, false);
String title = getArguments().getString("title");
return v;
}
我得到的错误是空对象引用中的标题。我只是无法弄清楚它在什么阶段造成这种中断,有什么我失踪?
您似乎没有对添加给定参数的'postDescription'片段做任何事情。相反,你在视图寻呼机实例中实例化一个新的PostDescription()。 – shiv