我正在尝试在列表导航模式下实现Android操作栏,它在从列表中选择项目时成功更改了片段,但片段重叠,我可以看到前一个片段的内容仍在屏幕上第二个被选中。这是我的Activity的OnCreate和OnNavigationItemSelected的代码:
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mFirstFragment = new FirstFragment();
mSecondFragment = new SecondFragment();
SpinnerAdapter mSpinnerAdapter = ArrayAdapter.createFromResource(
this,
R.array.action_list,
android.R.layout.simple_spinner_dropdown_item);
mActionBar = getActionBar();
mActionBar.setDisplayShowTitleEnabled(false);
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
mActionBar.setListNavigationCallbacks(mSpinnerAdapter, this);
if(savedInstanceState != null) {
mActionBar.setSelectedNavigationItem(
savedInstanceState.getInt("currFragment"));
}
}
public boolean onNavigationItemSelected(int position, long itemId) {
FragmentTransaction mFragmentTransaction =
getFragmentManager().beginTransaction();
switch(position) {
case FIRST_FRAGMENT:
mFragmentTransaction.replace(
android.R.id.content,
mFirstFragment);
break;
case SECOND_FRAGMENT:
mFragmentTransaction.replace(
android.R.id.content,
mSecondFragment);
break;
}
mFragmentTransaction.commit();
return true;
}
提前致谢!
答案 0 :(得分:1)
我有同样的问题。 FragmentTransaction .attach and .detach for Actionbar tabs中接受的答案对我有用。你也可以从Android Action Bar Tab with scrollview made duplicate view after orientation change得到很好的指示(虽然对我有用的关键见解来自我所链接的第一个问题)。