1、主要代码：
API:http://developer.android.com/reference/android/app/ActionBar.html
(1)不需要activity_main.xml文件
(2)MainActivity和fragment_1类都继承android.app.Fragment，而不是V4的
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final ActionBar actionBar; actionBar = getActionBar(); //使Tab显示出来 actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); //不显示标题和图标 actionBar.setDisplayShowTitleEnabled(false); actionBar.setDisplayShowHomeEnabled(false); //添加tab actionBar.addTab(actionBar .newTab() .setText("选项卡一") .setIcon(null) .setTabListener( new TabListener<fragment_1>(this, null, fragment_1.class))); actionBar.addTab(actionBar .newTab() .setText("选项卡二") .setIcon(null) .setTabListener( new TabListener<fragment_1>(this, null, fragment_1.class))); actionBar.addTab(actionBar .newTab() .setText("选项卡三") .setIcon(null) .setTabListener( new TabListener<fragment_1>(this, null, fragment_1.class))); } public static class TabListener<T extends Fragment> implements ActionBar.TabListener { private final Activity mActivity; private final String mTag; private final Class<T> mClass; private final Bundle mArgs; private Fragment mFragment; public TabListener(Activity activity, String tag, Class<T> clz) { this(activity, tag, clz, null); } public TabListener(Activity activity, String tag, Class<T> clz, Bundle args) { mActivity = activity; mTag = tag; mClass = clz; mArgs = args; // Check to see if we already have a fragment for this tab, probably // from a previously saved state. If so, deactivate it, because our // initial state is that a tab isn't shown. mFragment = mActivity.getFragmentManager().findFragmentByTag(mTag); if (mFragment != null && !mFragment.isDetached()) { FragmentTransaction ft = mActivity.getFragmentManager().beginTransaction(); ft.detach(mFragment); ft.commit(); } } public void onTabSelected(Tab tab, FragmentTransaction ft) { if (mFragment == null) { mFragment = Fragment.instantiate(mActivity, mClass.getName(), mArgs); ft.add(android.R.id.content, mFragment, mTag); } else { ft.attach(mFragment); } } public void onTabUnselected(Tab tab, FragmentTransaction ft) { if (mFragment != null) { ft.detach(mFragment); } } public void onTabReselected(Tab tab, FragmentTransaction ft) { Toast.makeText(mActivity, "Reselected!", Toast.LENGTH_SHORT).show(); } }
2、结合ViewPager实现可滑动选项卡
API: http://developer.android.com/reference/android/support/v4/view/ViewPager.html
(1)主要代码：
import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.app.FragmentTransaction; import android.support.v4.view.ViewPager; public class MainActivity extends FragmentActivity { ViewPager mViewPager; TabsAdapter mTabsAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mViewPager = new ViewPager(this); mViewPager.setId(R.id.tab_pager); setContentView(mViewPager); final ActionBar bar = getActionBar(); bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE); mTabsAdapter = new TabsAdapter(this, mViewPager); mTabsAdapter.addTab(bar.newTab().setText("Simple"), fragment_1.class, null); mTabsAdapter.addTab(bar.newTab().setText("List"), fragment_1.class, null); mTabsAdapter.addTab(bar.newTab().setText("Cursor"), fragment_1.class, null); if (savedInstanceState != null) { bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0)); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt("tab", getActionBar().getSelectedNavigationIndex()); } /** * This is a helper class that implements the management of tabs and all * details of connecting a ViewPager with associated TabHost. It relies on a * trick. Normally a tab host has a simple API for supplying a View or * Intent that each tab will show. This is not sufficient for switching * between pages. So instead we make the content part of the tab host 0dp * high (it is not shown) and the TabsAdapter supplies its own dummy view to * show as the tab content. It listens to changes in tabs, and takes care of * switch to the correct paged in the ViewPager whenever the selected tab * changes. */ public static class TabsAdapter extends FragmentPagerAdapter implements ActionBar.TabListener, ViewPager.OnPageChangeListener { private final Context mContext; private final ActionBar mActionBar; private final ViewPager mViewPager; private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>(); static final class TabInfo { private final Class<?> clss; private final Bundle args; TabInfo(Class<?> _class, Bundle _args) { clss = _class; args = _args; } } public TabsAdapter(Activity activity, ViewPager pager) { super(((FragmentActivity) activity).getSupportFragmentManager()); mContext = activity; mActionBar = activity.getActionBar(); mViewPager = pager; mViewPager.setAdapter(this); mViewPager.setOnPageChangeListener(this); } public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) { TabInfo info = new TabInfo(clss, args); tab.setTag(info); tab.setTabListener(this); mTabs.add(info); mActionBar.addTab(tab); notifyDataSetChanged(); } @Override public int getCount() { return mTabs.size(); } @Override public Fragment getItem(int position) { TabInfo info = mTabs.get(position); return Fragment.instantiate(mContext, info.clss.getName(), info.args); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { mActionBar.setSelectedNavigationItem(position); } @Override public void onPageScrollStateChanged(int state) { } public void onTabSelected(Tab tab, FragmentTransaction ft) { Object tag = tab.getTag(); for (int i = 0; i < mTabs.size(); i++) { if (mTabs.get(i) == tag) { mViewPager.setCurrentItem(i); } } } @Override public void onTabReselected(Tab tab, android.app.FragmentTransaction ft) { // TODO Auto-generated method stub } @Override public void onTabSelected(Tab tab, android.app.FragmentTransaction ft) { // TODO Auto-generated method stub } @Override public void onTabUnselected(Tab tab, android.app.FragmentTransaction ft) { // TODO Auto-generated method stub } } }
(2)xml文件加个Viewpager就可以了
(3)注意结合Viewpage的选项卡都要使用V4下的包，与第一个不同
(4)主Activity必须继承FragmentActivity
Done!