Java 在viewpager片段之间传递参数

我有一个包含两个片段的活动，一个用于列表，一个用于详细信息。我想做的是，每当单击一个列表项时，相关参数都会被发送到detailfragment。但我没能做到

以下是活动：

public class ActivityMain extends ActionBarActivity{

/**
 * The {@link android.support.v4.view.PagerAdapter} that will provide
 * fragments for each of the sections. We use a
 * {@link FragmentPagerAdapter} derivative, which will keep every
 * loaded fragment in memory. If this becomes too memory intensive, it
 * may be best to switch to a
 * {@link android.support.v4.app.FragmentStatePagerAdapter}.
 */
SectionsPagerAdapter mSectionsPagerAdapter;

/**
 * The {@link ViewPager} that will host the section contents.
 */

List<String> naviList = new ArrayList<String>();
ViewPager mViewPager;
private ActionBarDrawerToggle drawerToggle;
private DrawerLayout drawer;
ListView navList;
DrawerAdapter naviAdapter;
private static final int GRAVITY = Gravity.LEFT;
private static final String jsonURL = "";
List<String> categories = new ArrayList<String>();
int check = -1, listCheck = 0;
Dialog d;

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

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    //some methods (e.g. navi-drawer etc.)


}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    drawerToggle.syncState();
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    drawerToggle.onConfigurationChanged(newConfig);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.medicalendar_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    switch (item.getItemId()) {
        case R.id.action_settings:
            return true;
    }
    if (drawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}



/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {
    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        switch (position) {
            case 0:
                return ListFragment.newInstance("FirstFragment, Default");
            case 1:
                return DetailFragment.newInstance("DetailFragment, Detail");

            default:
                return ListFragment.newInstance("FirstFragment, Default");
        }
    }

    @Override
    public int getCount() {
        return 2;
    }
}

private boolean version() {
    if (Build.VERSION.SDK_INT > 11) {
        return true;
    } else {
        return false;
    }
}

如果你能帮助我，我将不胜感激

---

最好的，基本上你不需要使用ViewPager从一个片段导航到另一个片段。这应该通过使用FragmentTransaction类替换片段来实现，该类将允许您在事务中传递参数

如果仍然需要ViewPager，则应使用

fragment.setTag（“detail_fragment”）
然后，您的onListItemClick方法应该如下所示：

   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            //get detail fragment instance by it's tag
            DetailFragment detail = (DetailFragment) getActivity().getFragmentManager().findFragmentByTag("detail_fragment");
            detail.setParam("data"); //you should define this method in your detail fragment
            ViewPager vp = (ViewPager) getActivity().findViewById(R.id.pager);
            //clicked item's data to pass next page.
            vp.setCurrentItem(1);
        }

public void onItemClick（AdapterView父视图、视图视图、整型位置、长id）{
//通过标记获取细节片段实例
DetailFragment detail=（DetailFragment）getActivity（）.getFragmentManager（）.findFragmentByTag（“detail_fragment”）；
setParam（“data”）；//您应该在详细信息片段中定义此方法
ViewPager vp=（ViewPager）getActivity（）.findViewById（R.id.pager）；
//单击项目的数据以通过下一页。
副总裁：第（1）项；
}
非常感谢您的回答。如果我没有错，这只用于将参数发送到我的详细信息片段。那么，我如何在我的细节片段中获取这些值呢？对不起，先生，我无法理解您在这里的意思：detail.setParam（“data”）//您应该在detailfragments中定义这个方法。若要将任何参数传递给detailfragment，您需要一个对fragment类实例的引用。这是通过findFragmentByTag（）方法实现的。然后在DetailFragment类中创建新方法，并从list fragment调用它。我假设这个方法可以有一个带有字符串参数的setData（）名称。但您应该创建任何您需要的方法。
public class DetailFragment extends Fragment {

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



    ImageButton imageButton = (ImageButton) v.findViewById(R.id.d_map);
    imageButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getActivity().getApplicationContext(), "Navigating...", Toast.LENGTH_LONG).show();
        }
    });

    return v;
}

public static DetailFragment newInstance(String text) {

    DetailFragment f = new DetailFragment();
    Bundle b = new Bundle();
    b.putString("msg", text);
    f.setArguments(b);
    return f;
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {

}

   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            //get detail fragment instance by it's tag
            DetailFragment detail = (DetailFragment) getActivity().getFragmentManager().findFragmentByTag("detail_fragment");
            detail.setParam("data"); //you should define this method in your detail fragment
            ViewPager vp = (ViewPager) getActivity().findViewById(R.id.pager);
            //clicked item's data to pass next page.
            vp.setCurrentItem(1);
        }