这两天我正在尝试解决这个问题。我在网上和stackoverflow上搜索过，但我找不到我的问题的答案。
在我的应用程序中，我试图实现两个选项卡。需要显示一张地图，在另一个选项卡中我将显示一个列表适配器。（使用ActionBarSherlock）
当我单击第二个选项卡然后单击第一个选项卡时，出现异常：
10-08 01:27:45.203: E/AndroidRuntime(7082): java.lang.IllegalStateException: Activity 已被销毁
这是我的活动代码和我的片段类。（只是为了测试，我把 CustomMapFragment 类放了两次）。
public class MapActivity extends SherlockFragmentActivity implements LocationListener,TabListener{
LatLng mLocation;
GoogleMap map;
//CustomMapFragment fragment1 = new CustomMapFragment();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//FragmentManager fm = getSupportFragmentManager();
if (savedInstanceState == null) {
setContentView(R.layout.activity_main);
FragmentManager fm = getSupportFragmentManager();
setActionBar();
//fragment2 = new Fragment2();
//FragmentTransaction ft = fm.beginTransaction();
//ft.add(R.id.container, fragment1, "frag1");
//ft.add(R.id.fragment_container, fragment2, "frag2");
//ft.commit();
}
}
private void setActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
CustomMapFragment frag1 = new CustomMapFragment();
CustomMapFragment frag2 = new CustomMapFragment();
Tab tab1 = actionBar.newTab()
.setText("Frag1")
.setTabListener(new NavTabListener(frag1));
actionBar.addTab(tab1);
Tab tab2 = actionBar.newTab()
.setText("Frag2")
.setTabListener(new NavTabListener(frag2));
actionBar.addTab(tab2);
}
protected class NavTabListener implements ActionBar.TabListener {
private Fragment fragment;
public NavTabListener(Fragment fragment) {
this.fragment = fragment;
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
ft.replace(R.id.container, fragment);
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
FragmentManager fm = getSupportFragmentManager();
ft = fm.beginTransaction();
ft.remove(fragment);
ft.commit();
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onPause() {
super.onPause();
}
}
public class CustomMapFragment extends SherlockFragment{
private SupportMapFragment fragment;
private GoogleMap map;
public CustomMapFragment(){
super();
}
@Override
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
super.onCreate(savedInstanceState);
View lView = inflater.inflate(R.layout.map_fragment , null);
return lView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
FragmentManager fm = getChildFragmentManager();
fragment = (SupportMapFragment) fm.findFragmentById(R.id.map);
if (fragment == null) {
fragment = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, fragment).commit();
}
}
@Override
public void onResume() {
super.onResume();
if (map == null) {
map = fragment.getMap();
map.addMarker(new MarkerOptions().position(new LatLng(0, 0)));
}
}
}
提前致谢！