3

我在网上搜索了很多关于在一个操作栏选项卡中包含多个片段的可能性。

这个问题最接近我的需求，但代码不起作用。

是否有另一种可能在一个选项卡中包含多个片段？

这是StartActivity

public class StartActivity extends FragmentActivity implements ActionBar.TabListener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_start);

        // Set up the action bar.
        final ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        actionBar.addTab(
              actionBar.newTab()
             .setText("Karte")
              .setTabListener(new MapFragmentListener(this)));

    }

相应的布局acticity_start包含两个框架布局，用于将放置在选项卡中的两个片段。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >  

    <FrameLayout
        android:id="@+id/fragment_map"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>
    <FrameLayout
        android:id="@+id/fragment_realtime"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

TabListener看起来像这样：

private class TabListener implements ActionBar.TabListener {

        private static final String fragment1_tag = "fragment1_tag";
        private static final String fragment2_tag = "fragment2_tag";

        private FragmentActivity activity;
        private RealtimeFragment fragment1;
        private RealtimeFragment fragment2;

        public TabListener(FragmentActivity activity) {

            this.activity = activity;

            android.support.v4.app.FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();

            fragment1 = (RealtimeFragment) activity.getSupportFragmentManager().findFragmentByTag(fragment1_tag);
            if (fragment1 != null && !fragment1.isDetached()) {
                ft.detach(fragment1);
            }

            fragment2 = (RealtimeFragment) activity.getSupportFragmentManager().findFragmentByTag(fragment2_tag);
            if (fragment2 != null && !fragment2.isDetached()) {
                ft.detach(fragment2);
            }

            ft.commit();
        }

        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onTabSelected(Tab tab, FragmentTransaction ft) {

            android.support.v4.app.FragmentTransaction fragmentTransaction = activity.getSupportFragmentManager().beginTransaction();

            if(fragment1 == null) {
                fragment1 = new RealtimeFragment();
                fragmentTransaction.add(R.id.fragment_map, fragment1, fragment1_tag);
            } else {
                fragmentTransaction.attach(fragment1);
            }


            if(fragment2 == null) {
                fragment2 = new RealtimeFragment();
                fragmentTransaction.add(R.id.fragment_realtime, fragment2, fragment2_tag);
            } else {
                fragmentTransaction.attach(fragment2);
            }


            fragmentTransaction.commit();

        }

        @Override
        public void onTabUnselected(Tab tab, FragmentTransaction ft) {

            android.support.v4.app.FragmentTransaction fragementTransaction = activity.getSupportFragmentManager().beginTransaction();

            if(fragment1_tag != null)
                fragementTransaction.detach(fragment1);
            if(fragment2 != null)
                fragementTransaction.detach(fragment2);


            fragementTransaction.commit();

        }

    }

类RealtimeFragment和相应的布局fragment_realtime如下所示：

public class RealtimeFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_realtime, container, false);
        return view;
    }
}


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

RealtimeFragment现在在一个选项卡中应该显示该类的两个片段。片段只显示一个按钮，但没有显示！为什么？

4

1 回答 1

0

I was looking for a solution to the same Topic, and found this, which comes in quite handy.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <fragment android:name="com.example.news.ArticleListFragment"
            android:id="@+id/list"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="match_parent" />
    <fragment android:name="com.example.news.ArticleReaderFragment"
            android:id="@+id/viewer"
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="match_parent" />
</LinearLayout>

so Reference your Fragments and inflate it, just like a normal Fragment

于 2013-06-04T07:25:48.007 回答