适配器的代码如下public 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;
private Fragment fragment; TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
} public TabsAdapter(Activity activity, ViewPager pager) {
super(activity.getFragmentManager());
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);
info.fragment = Fragment.instantiate(mContext, info.clss.getName(), info.args);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
public void removeTab(ActionBar.Tab tab) {
mTabs.remove(tab.getTag());
mActionBar.removeTab(tab); notifyDataSetChanged();
} @Override
public void destroyItem(ViewGroup container, int position, Object object) {
// TODO Auto-generated method stub
super.destroyItem(container, position, object);
FragmentManager manager = ((Fragment) object).getFragmentManager();
FragmentTransaction trans = manager.beginTransaction();
trans.remove((Fragment) object);
trans.commit();
}
@Override
public int getItemPosition(Object object) {
// TODO Auto-generated method stub
Fragment fragment = (Fragment) object;
for (int i = 0; i < mTabs.size(); i++) {
String str1 = fragment.getClass().getName();
String str2 = mTabs.get(i).clss.getName();
if (str1.compareTo(str2) == 0) {
return i;
}
}
// The tab must have been removed
return POSITION_NONE;
} @Override
public int getCount() {
return mTabs.size();
} @Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
if (info.fragment == null) {
info.fragment = Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
return info.fragment;
}
// @Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
// mViewPager.setCurrentItem(position);
} // @Override
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
} // @Override
public void onPageScrollStateChanged(int state) {
} // @Override
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 onTabUnselected(Tab tab, FragmentTransaction ft) {
} // @Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}插入是正常的,但是我使用removeTab 后,可以删除当前的tab,但是Position就乱套了。我点击其他Tab时 。显示的不是当时插入相对应的Fragment。这个应该怎么弄呢androidactionbar
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;
private Fragment fragment; TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
} public TabsAdapter(Activity activity, ViewPager pager) {
super(activity.getFragmentManager());
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);
info.fragment = Fragment.instantiate(mContext, info.clss.getName(), info.args);
mTabs.add(info);
mActionBar.addTab(tab);
notifyDataSetChanged();
}
public void removeTab(ActionBar.Tab tab) {
mTabs.remove(tab.getTag());
mActionBar.removeTab(tab); notifyDataSetChanged();
} @Override
public void destroyItem(ViewGroup container, int position, Object object) {
// TODO Auto-generated method stub
super.destroyItem(container, position, object);
FragmentManager manager = ((Fragment) object).getFragmentManager();
FragmentTransaction trans = manager.beginTransaction();
trans.remove((Fragment) object);
trans.commit();
}
@Override
public int getItemPosition(Object object) {
// TODO Auto-generated method stub
Fragment fragment = (Fragment) object;
for (int i = 0; i < mTabs.size(); i++) {
String str1 = fragment.getClass().getName();
String str2 = mTabs.get(i).clss.getName();
if (str1.compareTo(str2) == 0) {
return i;
}
}
// The tab must have been removed
return POSITION_NONE;
} @Override
public int getCount() {
return mTabs.size();
} @Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
if (info.fragment == null) {
info.fragment = Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
return info.fragment;
}
// @Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
// mViewPager.setCurrentItem(position);
} // @Override
public void onPageSelected(int position) {
mActionBar.setSelectedNavigationItem(position);
} // @Override
public void onPageScrollStateChanged(int state) {
} // @Override
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 onTabUnselected(Tab tab, FragmentTransaction ft) {
} // @Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}插入是正常的,但是我使用removeTab 后,可以删除当前的tab,但是Position就乱套了。我点击其他Tab时 。显示的不是当时插入相对应的Fragment。这个应该怎么弄呢androidactionbar
解决方案 »
- android程序服务器端的问题请教,非常感谢
- ffmpeg cygwin + Android ndk 上编译不通过 config.sh问题
- Android系统源码下如何预置widget到界面
- 求各位大侠帮帮小弟一个问题。。。。
- android 系统对话框背景色属性
- Android 增加物理按键问题
- 关于同一个activity,不同显示的问题!~!!寻求解决方案。。。
- android中webview加载网页或网页切换时出现白屏现象
- android.intent.action.PHONE_STATE广播和PhoneStateListener
- 急需一个小型计算器的代码,有没有大神给一下
- 运行第一个文件就错了,Android AVD Error!请大家帮忙看下
- pull解析异常:XmlPullParserException: END_TAG expected
ArrayList 删除机制是否了解?
你删除之前 先跳转 mViewPager.setCurrentItem(i - 1)或mViewPager.setCurrentItem(i + 1);
谢谢回复 ,我解决了
我将 getItemPosition 修改成
public int getItemPosition(Object object) {
// The tab must have been removed
return POSITION_NONE;
}
这样就可以每次都是能拿到新的Fragment了