I watched a tutorial about first steps with the android studio. In this tutorial a guy is teaching how to make an android navigation drawer including the widget actions. I did all he did but I'm getting an error called must implement OnFragmentInteractionListener. I've searched on stackoverflow and found this question:
How to implement OnFragmentInteractionListener
I've did what the guy who answered the question but the error is still there. I'm looking now about hours to find a soulution but can't find anything. Hope you can figure out what I did wrong. Thanks for helping me! Here I call the fragment when a user clicks the settings tab in my drawer:
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_startpage) {
// Handle the camera action
} else if (id == R.id.nav_eating) {
} else if (id == R.id.nav_train) {
} else if (id == R.id.nav_recipe) {
} else if (id == R.id.nav_settings) {
SettingsFragment settingsFragment = new SettingsFragment();
FragmentManager settingsManager = getSupportFragmentManager();
settingsManager.beginTransaction().replace(R.id.content_navigation_drawer,
settingsFragment,
settingsFragment.getTag())
.commit();
}This is my acitivity:
package de.myfirstapp.myfirstapp.app;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
public class NavigationDrawerActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation_drawer);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Intent intentMain = getIntent();
String dpdisplayName = intentMain.getStringExtra("displayName");
String dploginEmail = intentMain.getStringExtra("loginEmail");
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
View headerView = navigationView.getHeaderView(0);
TextView navdisplayName = (TextView) headerView.findViewById(R.id.displayName);
navdisplayName.setText(dpdisplayName);
TextView navloginEmail = (TextView) headerView.findViewById(R.id.user_email);
navloginEmail.setText(dploginEmail);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_startpage) {
// Handle the camera action
} else if (id == R.id.nav_eating) {
} else if (id == R.id.nav_train) {
} else if (id == R.id.nav_recipe) {
} else if (id == R.id.nav_settings) {
SettingsFragment settingsFragment = new SettingsFragment();
FragmentManager settingsManager = getSupportFragmentManager();
settingsManager.beginTransaction().replace(R.id.content_navigation_drawer,
settingsFragment,
settingsFragment.getTag())
.commit();
} //else if (id == R.id.nav_logout) {
//}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}This is my fragment:
package de.myfitindustry.myfitindustry.app;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* A simple {@link Fragment} subclass.
* Activities that contain this fragment must implement the
* {@link SettingsFragment.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {@link SettingsFragment#newInstance} factory method to
* create an instance of this fragment.
*/
public class SettingsFragment extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public SettingsFragment() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment SettingsFragment.
*/
// TODO: Rename and change types and number of parameters
public static SettingsFragment newInstance(String param1, String param2) {
SettingsFragment fragment = new SettingsFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
TextView textView = new TextView(getActivity());
textView.setText(R.string.hello_blank_fragment);
return textView;
}
// TODO: Rename method, update argument and hook method into UI event
public void onButtonPressed(Uri uri) {
if (mListener != null) {
mListener.onFragmentInteraction(uri);
}
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
}
@Override
public void onStart() {
super.onStart();
try {
mListener = (OnFragmentInteractionListener) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException(getActivity().toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
/**
* This interface must be implemented by activities that contain this
* fragment to allow an interaction in this fragment to be communicated
* to the activity and potentially other fragments contained in that
* activity.
* <p>
* See the Android Training lesson <a href=
* "http://developer.android.com/training/basics/fragments/communicating.html"
* >Communicating with Other Fragments</a> for more information.
*/
public interface OnFragmentInteractionListener {
// TODO: Update argument type and name
void onFragmentInteraction(Uri uri);
}
}
