@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.fragment_tabs_pager);
    mTabHost = (TabHost)findViewById(android.R.id.tabhost);
    mTabHost.setup();

    mViewPager = (ViewPager)findViewById(R.id.pager);

    mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager);

    mTabsAdapter.addTab(mTabHost.newTabSpec("tab1").setIndicator("Tab 1"), MyFragment.class, null);
    mTabsAdapter.addTab(mTabHost.newTabSpec("tab2").setIndicator("Tab 2"), MyFragment.class, null);
    mTabsAdapter.addTab(mTabHost.newTabSpec("tab3").setIndicator("Tab 3"), MyFragment.class, null);
    mTabsAdapter.addTab(mTabHost.newTabSpec("tab4").setIndicator("Tab 4"), MyFragment.class, null);

    if (savedInstanceState != null) {
        mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
    }
}

类 MyFrashment 很简单 :

public class MyFragment extends Fragment {

    View v;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        if (container == null) {
                return null;
        }

        v = inflater.inflate(R.layout.test, container, false);
        return v;
    }
}

我简化了分层类所膨胀的布局, 改成简单的文字视图:

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

<TextView
    android:id="@+id/test_textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/some_default_value"
    android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

So, the thing is, I would like to ba able to modify the value of test_textView1 separately in each fragment, after they have been instantiated. My problem is that I don t manage to access to the elements of the layout of a fragment. I cannot directly use the findViewById() method since it would affect all the fragments. Inside the TabsAdapter class, I tried to access a single fragment, and then access its View by doing the following:

getItem(number).getView();

但它返回了 null ( getThomatter () 返回了正确的碎片, 但 getView () 返回了空号 ) 。