将数据从“活动”传递到“选项卡式布局片段”？

Question

我有两个活动。第一个是包含列表视图的普通活动，第二个是带有两个选项卡的选项卡式布局。一个是“描述”选项卡，另一个是“样本代码”选项卡。

我为每个创建了两个单独的片段，即“ OneFragment”和“ TwoFragment”。我需要的是，当用户单击我正常活动中的某个项目时，该项目将存储在字符串中，并且该字符串应传递到选项卡式布局中，并应显示在OneFragment中，即“说明”选项卡

（例）。我的列表包含{“ Android”，“ Studio”}，如果用户单击Android，则此文本应传递到说明标签，并使用TextView显示该文本。请帮我。在这里，我包括我各自的代码。

NormalActivity-> ListActi.java

   @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list);
        lv = (ListView) findViewById(R.id.listView);
        final List<String> ListElementsArrayList = new ArrayList<String>(Arrays.asList(listElements));
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>
                (getApplicationContext(), android.R.layout.simple_list_item_1, ListElementsArrayList);
        lv.setAdapter(adapter);
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                //Toast.makeText(getApplicationContext(), listElements[position],Toast.LENGTH_LONG).show();
                s = listElements[position];
                if(position == 1){
                    s = listElements[position];
                    Bundle bundle = new Bundle();
                    bundle.putString("ClickedItem", listElements[position]);
                    OneFragment fragobj = new OneFragment();
                    TwoFragment fag = new TwoFragment();
                    fragobj.setArguments(bundle);
                    fag.setArguments(bundle);
                    Intent i = new Intent(getApplicationContext(),BothLay.class);
                    startActivity(i);
                }
           }
        });
    }
}

TabActivity-> BothLay

public class BothLay extends AppCompatActivity  {
    private Toolbar toolbar;
    private TabLayout tabLayout;
    private ViewPager viewPager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_both_lay);
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);
        tabLayout = (TabLayout) findViewById(R.id.tabs);
        tabLayout.setupWithViewPager(viewPager);
    }
    private void setupViewPager(ViewPager viewPager) {
        ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
        adapter.addFragment(new OneFragment(), "Description");
        adapter.addFragment(new TwoFragment(), "Sample Code");
        viewPager.setAdapter(adapter);
    }
    class ViewPagerAdapter extends FragmentPagerAdapter {
        private final List<Fragment> mFragmentList = new ArrayList<>();
        private final List<String> mFragmentTitleList = new ArrayList<>();
        public ViewPagerAdapter(FragmentManager manager) {
            super(manager);
        }
        @Override
        public Fragment getItem(int position) {
            return mFragmentList.get(position);
        }
        @Override
        public int getCount(){
            return mFragmentList.size();
        }
        public void addFragment(Fragment fragment, String title) {
            mFragmentList.add(fragment);
            mFragmentTitleList.add(title);
        }
        @Override
        public CharSequence getPageTitle(int position) {
            return mFragmentTitleList.get(position);
        }
    }
}

解密选项卡-> OneFragment（我所需要的只是将数据从“正常活动”传递到此Fragment）

public class OneFragment extends Fragment{
    String strtext = "Ajay";
    public OneFragment() {
        // Required empty public constructor
    }
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View rootview = inflater.inflate(R.layout.fragment_one, container, false);
        TextView textView = (TextView) rootview.findViewById(R.id.t1);
        //strtext = getIntent().getStringExtra("ClickedItem"); //this doesn't work  
        textView.setText(strtext);
        return rootview;
    }
}

样本代码选项卡-> Twofragment

public class TwoFragment extends Fragment{
    public TwoFragment() {
        // Required empty public constructor
    }
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_two, container, false);
    }

}

Answer 1

这里：

fragobj.setArguments(bundle);
fag.setArguments(bundle);

单击Button无效，因为当前正在启动BothLayActivity而不是将Fragment添加到FragmentManager。

要使其正常工作：

1.BothLay在“单击按钮”上使用“意图向主动性” 传递捆绑包：

  Intent i = new Intent(getApplicationContext(),BothLay.class);
  i.putExtras(bundle);
  startActivity(i);

2.从意向获取捆绑在onCreate的 BothLay活动，然后把它传递到碎片的呼唤，当 adapter.addFragment方法：

  Bundle bundle = getIntent().getExtras();
  tabLayout.setupWithViewPager(viewPager,bundle);

将捆绑包传递给Fragment对象：

   private void setupViewPager(ViewPager viewPager,Bundle bundle) {
        ...
        Fragment fragmentOne=new OneFragment();
        fragmentOne.setArguments(bundle);
        adapter.addFragment(fragmentOne, "Description");
        // do same for second Framgment
   }

编辑：

要在Fragment中的Fragment调用getArguments方法中获取数据onCreateView：

Bundle bundle=getArguments();
if(bundle!=null){
  if(bundle.containsKey("ClickedItem")){
     String strClickedItem=bundle.getString("ClickedItem");
   }
}