我知道我不是第一个在这里提出这个问题的人,但不幸的是,正如我在标题中提到的,我在运行应用程序时遇到了错误。但是我已经在我的片段中导入了import android.support.v4.app.Fragment;
。 / p>
从父片段我点击它时有一个cardview我需要调用另一个片段来显示与点击的cardview相关的视图。
我已经尝试了很多针对stackoverflow中发布的相同问题的解决方案。但是对我来说没有任何工作。
Reminders.java
public class Reminders extends Fragment {
private OnFragmentInteractionListener mListener;
List<reminder> lstreminder;
public Reminders() {
}
public static Reminders newInstance(String param1, String param2) {
Reminders fragment = new Reminders();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_reminders, container, false);
lstreminder = new ArrayList<>();
lstreminder.add(new reminder("Alarm",R.drawable.alarms));
lstreminder.add(new reminder("Birthday",R.drawable.birthdays));
lstreminder.add(new reminder("Anniversary",R.drawable.anniversaries));
lstreminder.add(new reminder("Buy Gifts",R.drawable.buygift));
lstreminder.add(new reminder("Bill Payments",R.drawable.billpayments));
lstreminder.add(new reminder("Call / SMS",R.drawable.call));
lstreminder.add(new reminder("Recharges",R.drawable.recharges));
lstreminder.add(new reminder("Meetings",R.drawable.meetings));
lstreminder.add(new reminder("Insurance",R.drawable.insurances));
lstreminder.add(new reminder("Exams",R.drawable.exams));
lstreminder.add(new reminder("Holidays",R.drawable.holidays));
lstreminder.add(new reminder("Medical",R.drawable.medical));
lstreminder.add(new reminder("Purchase",R.drawable.purchase));
lstreminder.add(new reminder("Travel",R.drawable.travel));
lstreminder.add(new reminder("Shows",R.drawable.shows));
RecyclerView recyclerView = (RecyclerView) rootView.findViewById(R.id.mRecyclerView_id);
final RecyclerviewAdapter recyclerviewAdapter = new RecyclerviewAdapter(getActivity(),lstreminder);
recyclerView.setLayoutManager(new GridLayoutManager(getActivity(),3));
recyclerView.setAdapter(recyclerviewAdapter);
recyclerviewAdapter.setOnItemClickListner(new RecyclerviewAdapter.onItemClickListner() {
@Override
public void onClick(reminder str) {
if(str.getmTitle().equals("Alarm")){
Fragment fragment = new Alarm();
getFragmentManager().beginTransaction()
.replace(R.id.fragmrnt_alarm, fragment, fragment.getClass().getSimpleName()).addToBackStack(null).commit();
}
recyclerviewAdapter.notifyDataSetChanged();
}
});
return rootView;
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
}
Alarm.java
public class Alarm extends Fragment {
private OnFragmentInteractionListener mListener;
public Alarm() {
}
public static Alarm newInstance(String param1, String param2) {
Alarm fragment = new Alarm();
Bundle args = new Bundle();
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_alarm, container, false);
}
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
public interface OnFragmentInteractionListener {
void onFragmentInteraction(Uri uri);
}
}
答案 0 :(得分:2)
您需要使父活动实现OnFragmentInteractionListener
并覆盖该接口提供的方法。
class MyActivity implements OnFragmentInteractionListener
这是你的代码崩溃的地方,你的活动可能没有实现所提到的接口,因此当连接片段时发生了崩溃:
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}