7
我試圖在列表導航模式下實現Android Action Bar,它在從列表中選擇一個項目時成功更改片段,但片段重疊,並且可以看到前一個片段的內容當第二個被選中時仍然在屏幕上。這裏是我的代碼活動的OnCreate和OnNavigationItemSelected:ActionBar List Navigation重疊片段
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;
}
在此先感謝!