我目前使用FragmentStatePagerAdapter,我希望它具有「向上導航」功能(DisplayHomeAsUpEnabled)。當我設置下面的代碼時,它顯示爲正確的導航後退按鈕。但是當我點擊它時,什麼都沒有發生,你們能看到我的任何東西,在我的代碼中做錯了,按下「向上導航」按鈕時沒有錯誤,並且沒有編譯器錯誤。爲什麼我的android.R.id.home沒有在我的片段中調用?
這裏是代碼,它在「public boolean onOptionsItemSelected(MenuItem item){」它在底部感興趣。
public class ShareholdingDetailFragment extends FragmentActivity {
final int NUM_ITEMS = Portfolio.getPortfolio().count();
MyAdapter mAdapter;
ViewPager mPager;
Bundle extras;
@Override
protected void onCreate(Bundle savedInstanceState) {
System.out.println(NUM_ITEMS + "e");
super.onCreate(savedInstanceState);
setContentView(R.layout.shareholdingdetailview_fragment_wrapper);
mAdapter = new MyAdapter(getSupportFragmentManager());
mPager = (ViewPager)findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
}
public class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
public int getCount() {
return NUM_ITEMS;
}
public Fragment getItem(int position) {
return ShareholdingFragment.newInstance(position);
}
}
public static class ShareholdingFragment extends Fragment {
int mNum;
static ShareholdingFragment newInstance(int num) {
ShareholdingFragment f = new ShareholdingFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNum = getArguments() != null ? getArguments().getInt("num") : 1;
}
@SuppressLint({ "NewApi", "NewApi" })
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.shareholdingdetailview_fragment, container, false);
/****************Setting the Display as home and it shows*******************/
ActionBar bar = getActivity().getActionBar();
bar.setDisplayHomeAsUpEnabled(true);
/**********************************/
return view;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home://Not working
System.out.println("test");//This isn't printed out
Intent upIntent = new Intent(getActivity(), DetailShareHoldingActivity.class);
if (NavUtils.shouldUpRecreateTask(getActivity(), upIntent)) {
getActivity().finish();
} else {
NavUtils.navigateUpTo(getActivity(), upIntent);
}
return true;
}
return super.onOptionsItemSelected(item);
}
}
}
它也看起來你已經把onOptionsItemSelected(...)在你的片段,而不是ShareholdingDetailFragment。嘗試移動它也可能解決你的問題=) –
謝謝解決它=) – anders