嗨，我需要在我的应用程序中实现 ActionBar，但我不明白从哪里开始。
我希望得到这个例子
我已经测试了 ShareLock 和其他东西，但我无法成功实现这些示例，我需要使用 Fragments 来获得这个结果，并且应该有 4 个选项卡。
我用过android-support-v4.jar。
这是我使用的 Fragment Utils。
public class TabManager implements TabHost.OnTabChangeListener {
private final FragmentActivity mActivity;
private final TabHost mTabHost;
private final int mContainerId;
private final HashMap<String, TabInfo> mTabs = new HashMap<String, TabInfo>();
TabInfo mLastTab;
static final class TabInfo {
private final String tag;
private final Class<?> clss;
private final Bundle args;
private Fragment fragment;
TabInfo(String _tag, Class<?> _class, Bundle _args) {
tag = _tag;
clss = _class;
args = _args;
}
}
static class DummyTabFactory implements TabHost.TabContentFactory {
private final Context mContext;
public DummyTabFactory(Context context) {
mContext = context;
}
@Override
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
public TabManager(FragmentActivity activity, TabHost tabHost, int containerId) {
mActivity = activity;
mTabHost = tabHost;
mContainerId = containerId;
mTabHost.setOnTabChangedListener(this);
}
public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) {
tabSpec.setContent(new DummyTabFactory(mActivity));
String tag = tabSpec.getTag();
TabInfo info = new TabInfo(tag, clss, 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.
info.fragment = mActivity.getSupportFragmentManager().findFragmentByTag(tag);
if (info.fragment != null && !info.fragment.isDetached()) {
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
ft.detach(info.fragment);
ft.commit();
}
mTabs.put(tag, info);
mTabHost.addTab(tabSpec);
}
@Override
public void onTabChanged(String tabId) {
TabInfo newTab = mTabs.get(tabId);
FragmentManager fragmentManager = mActivity.getSupportFragmentManager();
if (mLastTab != newTab) {
FragmentTransaction ft = fragmentManager.beginTransaction();
if (mLastTab != null) {
if (mLastTab.fragment != null) {
ft.detach(mLastTab.fragment);
}
}
fragmentManager.popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
if (newTab != null) {
if (newTab.fragment == null) {
newTab.fragment = Fragment.instantiate(mActivity,
newTab.clss.getName(), newTab.args);
ft.add(mContainerId, newTab.fragment, newTab.tag);
} else {
ft.attach(newTab.fragment);
}
}
mLastTab = newTab;
ft.commit();
mActivity.getSupportFragmentManager().executePendingTransactions();
}
}
}
还有一些......
public class FragmentsUtils {
private static String DIALOG_TAG = "dialog_tag";
/*public static MyAlertDialogFragment showDialog(FragmentManager fragmentManager, int id) {
// DialogFragment.show() will take care of adding the fragment
// in a transaction. We also want to remove any currently showing
// dialog, so make our own transaction and take care of that here.
FragmentTransaction ft = fragmentManager.beginTransaction();
Fragment prev = fragmentManager.findFragmentByTag(DIALOG_TAG);
if (prev != null) {
ft.remove(prev);
}
// ft.addToBackStack(null);
// Create and show the dialog.
MyAlertDialogFragment newFragment = MyAlertDialogFragment.newInstance(id);
newFragment.show(ft, DIALOG_TAG);
return newFragment;
}*/
public static void swapFragments(FragmentManager fragmentManager, int containerViewId, Fragment newFragment, String fragmentTag) {
if (fragmentManager == null)
return;
View newFragmentMainView = newFragment.getView();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
// fragmentTransaction.replace(containerViewId, fragment);
if (fragmentTag == null || fragmentTag.length() < 1)
fragmentTransaction.add(containerViewId, newFragment);
else
fragmentTransaction.add(containerViewId, newFragment, fragmentTag);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
fragmentTransaction.commit();
}
public static void swapFragments(FragmentManager fragmentManager, int containerViewId, Fragment newFragment) {
swapFragments(fragmentManager, containerViewId, newFragment, null);
}
}
提前谢谢了...