android - 将值从 ActionBarActivity 发送到 ListFragment

Question

我有一个实现 ActionBar.TabListener 的 ActionBarActivity，如下所示

public class MainActivity extends ActionBarActivity implements
        ActionBar.TabListener {
viewPager = (ViewPager) findViewById(R.id.pager);
    actionBar = getSupportActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    mAdapter = new TabsPagerAdapter(getSupportFragmentManager());
    viewPager.setAdapter(mAdapter);

    Tab tab1 = actionBar.newTab();
    tab1.setText("Home");
    tab1.setTabListener(this);
    actionBar.addTab(tab1);

//我还有其他几个标签

viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageSelected(int arg0) {
            // TODO Auto-generated method stub
            actionBar.setSelectedNavigationItem(arg0);
        }

我有一些像下面这样的 ListFragment..

public class Home extends ListFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.home, container, false);
    return rootView;
}
}

我需要根据特定条件将特定键或值从MainActivity 发送到ListFragment。我该如何实现？我如何从 ListFragment 接收这些值？我也在使用 ViewPager。所以我将无法传递静态 fragment 名称。

Answer 1

你可以这样做——

MainActivity 类 -

public class MainActivity extends ActionBarActivity implements
    ActionBar.TabListener {

    private String myString = "hello";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
        ...
    }

    public String getMyData() {
        return myString;
    }
}

Home Fragment 类 -

public class Home extends ListFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, 
    ViewGroup container, Bundle savedInstanceState) {
         View rootView = inflater.inflate(R.layout.home, container, false);

        MainActivity activity = (MainActivity) getActivity();
        String myDataFromActivity = activity.getMyData();
        return rootView;
    }
}