听到是我的FragmentActivity
,运行后我的第一个选项卡为空。
public class MainActivity extends FragmentActivity implements
OnTabChangeListener, OnPageChangeListener {
private TabHost mTabHost;
private ViewPager mViewPager;
private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, MainActivity.TabInfo>();
private PagerAdapter mPagerAdapter;
private TabInfo mLastTab = null;
private class TabInfo {
private String tag;
private Class clss;
private Bundle args;
private Fragment fragment;
TabInfo(String tag, Class clazz, Bundle args) {
this.tag = tag;
this.clss = clazz;
this.args = args;
}
}
class TabFactory implements TabContentFactory {
private final Context mContext;
/**
* @param context
*/
public TabFactory(Context context) {
mContext = context;
}
/**
* (non-Javadoc)
*
* @see android.widget.TabHost.TabContentFactory#createTabContent(java.lang.String)
*/
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
Log.d("checking", "setup tabs...");
setContentView(R.layout.activity_main);
// //
initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
}
intialiseViewPager();
// //
}
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab", mTabHost.getCurrentTabTag()); // save the tab
// selected
super.onSaveInstanceState(outState);
}
private void intialiseViewPager() {
List<Fragment> fragments = new Vector<Fragment>();
fragments
.add(Fragment.instantiate(this, CoachFragment.class.getName()));
fragments
.add(Fragment.instantiate(this, LogingFragment.class.getName()));
fragments.add(Fragment.instantiate(this,
HistoryFragment.class.getName()));
this.mPagerAdapter = new PagerAdapter(
super.getSupportFragmentManager(), fragments);
//
this.mViewPager = (ViewPager) super.findViewById(R.id.viewpager);
this.mViewPager.setAdapter(this.mPagerAdapter);
this.mViewPager.setOnPageChangeListener(this);
}
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
View tabView1 = createTabView(this, "coach");
MainActivity.AddTab(this, this.mTabHost, this.mTabHost
.newTabSpec("Tab1").setIndicator(tabView1),
(tabInfo = new TabInfo("Tab1", CoachFragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
View tabView2 = createTabView(this, "log book");
MainActivity.AddTab(this, this.mTabHost, this.mTabHost
.newTabSpec("Tab2").setIndicator(tabView2),
(tabInfo = new TabInfo("Tab2", LogingFragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
View tabView3 = createTabView(this, "history");
MainActivity.AddTab(this, this.mTabHost, this.mTabHost
.newTabSpec("Tab3").setIndicator(tabView3),
(tabInfo = new TabInfo("Tab3", HistoryFragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
mTabHost.setOnTabChangedListener(this);
}
private static void AddTab(MainActivity activity, TabHost tabHost,
TabHost.TabSpec tabSpec, TabInfo tabInfo) {
// Attach a Tab view factory to the spec
tabSpec.setContent(activity.new TabFactory(activity));
tabHost.addTab(tabSpec);
}
public void onTabChanged(String tag) {
// TabInfo newTab = this.mapTabInfo.get(tag);
int pos = this.mTabHost.getCurrentTab();
this.mViewPager.setCurrentItem(pos);
}
private static View createTabView(final Context context, final String text) {
View view = LayoutInflater.from(context)
.inflate(R.layout.tabs_bg, null);
TextView tv = (TextView) view.findViewById(R.id.tabsText);
tv.setText(text);
return view;
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageSelected(int position) {
// TODO Auto-generated method stub
this.mTabHost.setCurrentTab(position);
}
}
听到的是CoachFragment代码:
public class CoachFragment extends Fragment implements AnimationListener {
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
return (LinearLayout)inflater.inflate(R.layout.coach_activity, container, false);
}
其他拖曳片段相同,并且我对所有三个拖曳片段使用相同的布局文件,其他拖曳则没有问题。
最佳答案
根据Android Documentation,针对您的情况的最佳方法是实现FragmentPagerAdapter。
您可以这样:
1-创建自己的适配器:
private class YourAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener
{
Fragment screens[];
public CheckinHistoryAdapter(FragmentManager fm) {
super(fm);
screens = new Fragment[3];
screens[0] = new CoachFragment();
screens[1] = new LogingFragment();
screens[2] = new HistoryFragment();
}
@Override
public Fragment getItem(int index) {
if(index <= screens.length)
{
return screens[index];
}
return null;
}
@Override
public int getCount() {
return screens.length;
}
}
在您的Activity的intialiseViewPager上将是这样的:
private void intialiseViewPager() {
this.mPagerAdapter = new YourAdapter(super.getSupportFragmentManager());
//
this.mViewPager = (ViewPager) super.findViewById(R.id.viewpager);
this.mViewPager.setAdapter(this.mPagerAdapter);
this.mViewPager.setOnPageChangeListener(this);
}