我想创建一个App，它有一个NavigationView和一些片段。我没有问题来显示不同的片段并在应用程序内导航。但我没有设法在片段中实现按钮。
点击按钮后没有任何反应。但是我没有任何错误。我在互联网上搜索过，我真的不明白它为什么不起作用。我使用的方法与经典＆＃34;相同。活动。我想b.setOnClickListener(this)存在问题。我粘贴了我的代码。我希望你们中的一个人能看到我的错误。非常感谢阅读。
Accueil.java（mainActivity）：
public class Accueil extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener,
HomeFragment.OnFragmentInteractionListener,Settings_accountFragment.OnFragmentInteractionListener {
NavigationView navigationView;
private FragmentTransaction fragmentTransaction;
private FragmentManager fragmentManager;
private static UserLocalStore userLocalStore;
private static User user;
public Intent login;
//private TextView eventName,eventPlace,eventSchedule;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_accueil);
userLocalStore=new UserLocalStore(this);
login=new Intent(this,LoginActivity.class);
navigationView = (NavigationView) findViewById(R.id.nav_view);
fragmentManager = getFragmentManager();
Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(myToolbar);
getSupportActionBar();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, myToolbar, 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);
loadSelection(0);
}
private void loadSelection(int i){
switch (i){
case 0:
HomeFragment homeFragment = new HomeFragment();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragmentholder,homeFragment);
fragmentTransaction.commit();
break;
case 1:
Settings_accountFragment settings_account = new Settings_accountFragment();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragmentholder,settings_account);
fragmentTransaction.commit();
break;
default:
break;
}
}
@Override
protected void onStop() {
//userLocalStore.clearUserData();
userLocalStore.setUserLoggedIn(false);
userLocalStore.deleteCurrentUser();
super.onStop();
}
@Override
protected void onStart() {
super.onStart();
if(userLocalStore.getUserLoggedIn()) {
user=userLocalStore.getLoggedInUser(userLocalStore.getCurrentUser());
int i=0;
//How to change elements in the header programatically
View headerView = navigationView.getHeaderView(0);
TextView emailText = (TextView) headerView.findViewById(R.id.mail_header);
emailText.setText(user.getMail());
}
}
@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_acc) {
// Handle the camera action
loadSelection(0);
} else if (id == R.id.nav_param) {
} else if (id == R.id.nav_param_compte) {
loadSelection(1);
} else if(id==R.id.logOut){
userLocalStore.setUserLoggedIn(false);
userLocalStore.deleteCurrentUser();
startActivity(login);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//getMenuInflater().inflate(R.menu.menu_calendar, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
return super.onOptionsItemSelected(item);
}
public static User getUser() {
return user;
}
public static UserLocalStore getUserLocalStore() {
return userLocalStore;
}
@Override
public void onFragmentInteraction(Uri uri) {
}
/*public void setEventNameText(String name) {
this.eventName.setText(name);
}
public void setEventPlaceText(String place) {
this.eventName.setText(place);
}
public void setEventScheduleText(String schedule) {
this.eventName.setText(schedule);
}*/
/*@Override
public Dialog onCreateDialog (int id) {
Dialog box = null;
switch(id) {
// Quand on appelle avec l'identifiant de la boîte normale
case ID_NORMAL_DIALOG:
box = new Dialog(this);
box.setTitle("Je viens tout juste de naître.");
break;
// Quand on appelle avec l'identifiant de la boîte qui s'énerve
case ID_ENERVEE_DIALOG:
box = new Dialog(this);
box.setTitle("ET MOI ALORS ???");
}
return box;
}
@Override
public void onPrepareDialog (int id, Dialog box) {
if(id == ID_NORMAL_DIALOG && compteur > 1)
box.setTitle("On est au " + compteur + "ème lancement !");
//On ne s'intéresse pas au cas où l'identifiant vaut 1, puisque cette boîte affiche le même texte à chaque lancement
}*/
}
Settings_accountFragment.java：
public class Settings_accountFragment extends Fragment implements View.OnClickListener {
// 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";
Button b;
View v;
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private OnFragmentInteractionListener mListener;
public Settings_accountFragment() {
// 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 Settings_accountFragment.
*/
// TODO: Rename and change types and number of parameters
public static Settings_accountFragment newInstance(String param1, String param2) {
Settings_accountFragment fragment = new Settings_accountFragment();
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) {
// Inflate the layout for this fragment
v=inflater.inflate(R.layout.fragment_settings_account, container, false);
b=(Button)v.findViewById(R.id.button);
b.setOnClickListener(this);
return inflater.inflate(R.layout.fragment_settings_account, container, false);
}
// 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);
if (context instanceof OnFragmentInteractionListener) {
mListener = (OnFragmentInteractionListener) context;
} else {
throw new RuntimeException(context.toString()
+ " must implement OnFragmentInteractionListener");
}
}
@Override
public void onDetach() {
super.onDetach();
mListener = null;
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.button:
Log.d("coucou","true");
break;
}
}
/**
* 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);
}
}
fragment_settings_account.xml：
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/parametre_compte"
android:background="@color/grey"
android:gravity="center"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="@+id/button"
android:layout_gravity="center_horizontal" />
</FrameLayout>
答案 0 :(得分：0)
您没有显示包含您设置点击侦听器的按钮的正确视图，因为您再次对视图进行充气并在onCreateView()中将其返回。
替换
return inflater.inflate(R.layout.fragment_settings_account, container, false);
使用
return v;
这样您就可以返回已经膨胀的视图。
答案 1 :(得分：0)
在Settings_accountFragment:onCreateView中，您要对视图进行两次充气。删除第二个充气代码，只需return v;
v=inflater.inflate(R.layout.fragment_settings_account, container, false);
b=(Button)v.findViewById(R.id.button);
b.setOnClickListener(this);
return v;
另外，附注 - 在Java class names中使用'_'并不常见。 SettingsAccountFragment优于Settings_accountFragment