长时间听众，第一次海报。我是Android的新手，但我一直在努力通过Big Ranch Guide示例来努力提高我的理解力。
我正在尝试在以下课程中显示操作栏。
public class CrimeFragment extends Fragment {
private Crime mCrime;
private EditText mTitleField;
private Button mDateButton;
private Button mTimeButton;
private CheckBox mSolvedCheckedBox;
public static final String EXTRA_CRIME_ID = "com.example.criminalIntent";
private static final String DIALOG_DATE = "date";
private static final String DIALOG_TIME = "time";
private static final int REQUEST_DATE = 0;
private static final int REQUEST_TIME = 1;
@TargetApi(11)
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
UUID crimeId = (UUID)getArguments().getSerializable(EXTRA_CRIME_ID);
mCrime = CrimeLab.get(getActivity()).getCrime(crimeId);
setHasOptionsMenu(true);
}
public void updateDate() {
SimpleDateFormat datFormat = new SimpleDateFormat("MMM dd, yyyy");
SimpleDateFormat timFormat = new SimpleDateFormat("hh:mm:ss zzz");
mDateButton.setText(datFormat.format(mCrime.getDate()));
mTimeButton.setText(timFormat.format(mCrime.getDate()));
}
@TargetApi(11)
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_crime, parent, false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
if (NavUtils.getParentActivityName(getActivity()) != null) {
if (getActivity().getActionBar() == null){
Log.d("CrimeFragment", "Sh*t!!");
} else
getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
//((ActionBarActivity)getActivity()).getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
mTitleField = (EditText)v.findViewById(R.id.crime_title);
mTitleField.setText(mCrime.getTitle());
mTitleField.addTextChangedListener(new TextWatcher() {
public void onTextChanged (CharSequence c, int start, int before, int count){
mCrime.setTitle(c.toString());
}
public void beforeTextChanged (CharSequence c, int start, int before, int count){
//leave blank
}
public void afterTextChanged(Editable c) {
//leave blank
}
});
mDateButton = (Button)v.findViewById(R.id.crime_date);
mDateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fm = getActivity().getSupportFragmentManager();
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(fm, DIALOG_DATE);
}
});
mTimeButton = (Button)v.findViewById(R.id.crime_time);
mTimeButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fm = getActivity().getSupportFragmentManager();
TimePickerFragment dialog = TimePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_TIME);
dialog.show(fm, DIALOG_TIME);
}
});
mSolvedCheckedBox = (CheckBox)v.findViewById(R.id.crime_solved);
mSolvedCheckedBox.setChecked(mCrime.getSolved());
mSolvedCheckedBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked){
mCrime.setSolved(isChecked);
}
});
updateDate();
return v;
}
//This adds a crime unique identifier to the fragment for retrieval by CrimeActivity
public static CrimeFragment newInstance(UUID crimeId) {
Bundle args = new Bundle();
args.putSerializable(EXTRA_CRIME_ID, crimeId);
CrimeFragment fragment = new CrimeFragment();
fragment.setArguments(args);
return fragment;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
//to be implemented next
if (NavUtils.getParentActivityName(getActivity())!= null){
NavUtils.navigateUpFromSameTask(getActivity());
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
final SimpleDateFormat df = new SimpleDateFormat(("MM/DD/yyyy"));
if (resultCode != Activity.RESULT_OK){
return;
}
if (requestCode == REQUEST_DATE) {
Date date = (Date)data.getSerializableExtra(DatePickerFragment.EXTRA_DATE);
mCrime.setDate(date);
updateDate();
}
if (requestCode == REQUEST_TIME) {
Date date = (Date)data.getSerializableExtra(TimePickerFragment.EXTRA_TIME);
mCrime.setDate(date);
updateDate();
}
}
}
StackOverflow在为他的问题提供大量解决方案方面提供了令人难以置信的帮助。我尝试了以下内容。
从代码中我可以看到，我也在API11上定位了视图功能。任何帮助将不胜感激。
感谢您的评论，它是从CrimeListActivity中的菜单调用，如下所示。
public class CrimeListFragment extends ListFragment {
private ArrayList<Crime> mCrimes;
private static final String TAG = "CrimeListFragment";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
//getActivity().getActionBar().show();
getActivity().setTitle(R.string.crimes_title);
mCrimes = CrimeLab.get(getActivity()).getCrimes();
CrimeAdapter adapter = new CrimeAdapter(mCrimes);
setListAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id){
Crime c = (Crime)(getListAdapter()).getItem(position);
Log.d(TAG, c.getTitle() + " was clicked");
//Start CriminalPagerActivity
Intent i = new Intent(getActivity(), CrimePagerActivity.class);
i.putExtra(CrimeFragment.EXTRA_CRIME_ID, c.getId());
startActivity(i);
}
private class CrimeAdapter extends ArrayAdapter<Crime> {
public CrimeAdapter(ArrayList<Crime> crimes){
super(getActivity(), 0, crimes);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// if no view, inflate one.
if (convertView == null) {
convertView = getActivity().getLayoutInflater().inflate(R.layout.list_item_crime, null);
}
//Configure the view for this Crime
Crime c = mCrimes.get(position);
TextView titleTextView = (TextView)convertView.findViewById(R.id.crime_list_item_titleTextView);
titleTextView.setText(c.getTitle());
TextView dateTextView = (TextView)convertView.findViewById(R.id.crime_list_item_dateTextView);
dateTextView.setText(c.getDate().toString());
CheckBox solvedCheckBox = (CheckBox)convertView.findViewById(R.id.crime_list_item_solvedCheckBox);
solvedCheckBox.setChecked(c.getSolved());
return convertView;
}
}
@Override
public void onResume() {
super.onResume();
((CrimeAdapter)getListAdapter()).notifyDataSetChanged();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater){
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.fragment_crime_list, menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()) {
case R.id.menu_item_new_crime:
Crime crime = new Crime();
CrimeLab.get(getActivity()).addCrime(crime);
Intent i = new Intent(getActivity(), CrimePagerActivity.class);
i.putExtra(CrimeFragment.EXTRA_CRIME_ID, crime.getId());
startActivityForResult(i, 0);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}