So I'm creating an app and I'm stuck with this problem of my fragment not showing on screen. It looks just fine on Android Studio preview, but when run on real device I only see action bar and nothing else.
Here's my fragment code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<EditText
android:id="#+id/fragment_login_userEmail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"/>
<EditText
android:id="#+id/fragment_login_userPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/fragment_login_loginButton"
android:text="Sign In"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/fragment_login_registerButton"
android:text="Sign Up"/>
</LinearLayout>
LoginFragment code:
package com.dario.beastchat.fragments;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import com.dario.beastchat.R;
import com.dario.beastchat.R2;
import com.dario.beastchat.activities.BaseFragmentActivity;
import com.dario.beastchat.activities.RegisterActivity;
import com.dario.beastchat.utils.Constants;
import java.net.URISyntaxException;
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
import butterknife.Unbinder;
import io.socket.client.IO;
import io.socket.client.Socket;
public class LoginFragment extends BaseFragment {
#BindView(R2.id.fragment_login_userEmail)
EditText mUserEmailEt;
#BindView(R2.id.fragment_login_userPassword)
EditText mUserPasswordEt;
#BindView(R2.id.fragment_login_loginButton)
Button mLoginButton;
#BindView(R2.id.fragment_login_registerButton)
Button mRegisterButton;
private Unbinder mUnbinder;
private Socket mSocket;
public static LoginFragment newInstance(){
return new LoginFragment();
}
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
mSocket = IO.socket(Constants.IP_LOCAL_HOST);
} catch (URISyntaxException e) {
Log.i(LoginFragment.class.getSimpleName(), e.getMessage());
Toast.makeText(getActivity(), "Cant connect to the server", Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
mSocket.connect();
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_login, container, false);
mUnbinder = ButterKnife.bind(this, rootView);
return rootView;
}
#OnClick(R2.id.fragment_login_registerButton)
public void setmRegisterButton(){
startActivity(new Intent(getActivity(), RegisterActivity.class));
}
#Override
public void onDestroyView() {
super.onDestroyView();
mUnbinder.unbind();
}
#Override
public void onDestroy() {
super.onDestroy();
mSocket.disconnect();
}
}
BaseFragment class:
package com.dario.beastchat.fragments;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
public class BaseFragment extends Fragment {
#Override
public void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
}
And BaseFragment activity:
import android.os.Bundle;
import android.os.PersistableBundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import com.dario.beastchat.R;
public abstract class BaseFragmentActivity extends AppCompatActivity {
abstract Fragment createFragment();
#Override
public void onCreate(#Nullable Bundle savedInstanceState, #Nullable PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
setContentView(R.layout.activity_fragment_base);
FragmentManager fragmentManager = getSupportFragmentManager();
Fragment fragment = fragmentManager.findFragmentById(R.id.activity_fragment_base_fragmentContainer);
if (fragment ==null) {
fragment = createFragment();
fragmentManager.beginTransaction()
.add(R.id.activity_fragment_base_fragmentContainer, fragment)
.commit();
}
}
}
What am I doing wrong?
if (fragment ==null) {
fragment = createFragment();
fragmentManager.beginTransaction()
.add(R.id.activity_fragment_base_fragmentContainer, fragment)
.commit();
}
Problems is .add
try to replace it to replace
Related
I have created Inside app activity where I have called different fragments using switch case and called that Inside App activity in the main_activity, but the issue is that only one fragments appear that I have showed as default but if we click on the menu Items then they won't change ? I have tried many different methods but I don't know where I did anything wrong bcz it isn't working.
Inside App :
package com.example.myapplication;
import android.content.ClipData;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;
public class InsideApp extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inside_app);
HomeFragment home_Fragment = new HomeFragment();
Setting_Fragment setting_fragment = new Setting_Fragment();
profile_fragment profile_fragment = new profile_fragment();
BottomNavigationView bottomNavigationView;
bottomNavigationView = findViewById(R.id.bottomNavigationView);
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.layout, new HomeFragment())
.commit();
bottomNavigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment fragment = null;
switch (menuItem.getItemId()) {
case R.id.home_fragment:
fragment = new HomeFragment();
break;
case R.id.profiles:
fragment = new profile_fragment();
break;
case R.id.settings:
fragment = new Setting_Fragment();
break;
}
if (fragment != null) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.layout, fragment)
.commit();
return true;
}
return false;
}
});
}
}
`
Main Activity:
`package com.example.myapplication;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.VideoView;
public class MainActivity extends AppCompatActivity {
private AppBarConfiguration appBarConfiguration;
private Button insideApp ;
private Button demovideo;
public void SubmitButton(View view){
Toast.makeText(this, "LOGIN SUCCESSFUL", Toast.LENGTH_SHORT).show();
}
public void forgetpassword(View view){
Toast.makeText(this, "WORKING ON THIS NODE..!", Toast.LENGTH_SHORT).show();
}
public void btn_google(View view){
Toast.makeText(this, "WORKING ON THIS NODE..!", Toast.LENGTH_SHORT).show();
}
public void btn_facebook(View view){
Toast.makeText(this, "WORKING ON THIS NODE..!", Toast.LENGTH_SHORT).show();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView btn = findViewById(R.id.textViewSignup);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, Register.class);
startActivity(intent);
}
});
insideApp = findViewById(R.id.Login);
insideApp.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, InsideApp.class);
startActivity(intent);
}
});
demovideo = findViewById(R.id.aboutus);
demovideo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, demovideo.class);
startActivity(intent);
}
});
}
}
`
XMl of InsideAPP
`<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".InsideApp">
<FrameLayout
android:id="#+id/layout"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/bottomNavigationView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/bottomNavigationView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:animationCache="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:menu="#menu/menu_view" />
</android.support.constraint.ConstraintLayout>`
I have a problem with Java. I am trying to create a simple android app and I get a problem with the navigation menu button. I think the problem is the way that the function is set up and I have looked into threads and synchronize but that doesn't work either this is the code that has the problem.
loginScreen.java
package com.example.myapplication;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.widget.LinearLayoutCompat;
import androidx.fragment.app.Fragment;
import static android.content.Context.INPUT_METHOD_SERVICE;
import static androidx.core.content.ContextCompat.getSystemService;
public class loginScreen extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.login_screen, container, false);
view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
hideKeyboardFrom(getContext(), getView());
}
});
return view;
}
public static void hideKeyboardFrom(Context context, View view) {
InputMethodManager imm = (InputMethodManager) context.getSystemService(Activity.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
}
MainActivity.java
package com.example.myapplication;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.LinearLayoutCompat;
import androidx.appcompat.widget.Toolbar;
import androidx.core.view.GravityCompat;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import android.app.Activity;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import com.google.android.material.navigation.NavigationView;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
DrawerLayout drawerLayout;
ActionBarDrawerToggle actionBarDrawerToggle;
Toolbar toolbar;
NavigationView navigationView;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawerLayout = findViewById(R.id.drawer_layout);
navigationView = findViewById(R.id.navigationView);
navigationView.setNavigationItemSelectedListener(this);
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open, R.string.close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.setDrawerIndicatorEnabled(true);
actionBarDrawerToggle.syncState();
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.container_fragment, new MainFragment());
fragmentTransaction.commit();
}
#RequiresApi(api = Build.VERSION_CODES.M)
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
drawerLayout.closeDrawer(GravityCompat.START);
if(item.getItemId() == R.id.login){
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_fragment, new loginScreen());
fragmentTransaction.commit();
hideKeyboard(this);
}
if(item.getItemId() == R.id.register){
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.container_fragment, new registerScreen());
fragmentTransaction.commit();
}
return false;
}
public static void hideKeyboard(Activity activity) {
InputMethodManager imm = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
//Find the currently focused view, so we can grab the correct window token from it.
View view = activity.getCurrentFocus();
//If no view currently has focus, create a new one, just so we can grab a window token from it
if (view == null) {
view = new View(activity);
}
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
}
On the actual build once I go to the login screen, I can no longer just press the menu button I have to click and drag for it to open. If the information I have provided is a bit vague I'm sorry I wasn't sure what to include.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<include
android:layout_height="match_parent"
android:layout_width="match_parent"
layout="#layout/drawer_toolbar"/>
<include
layout="#layout/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.google.android.material.navigation.NavigationView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/navigationView"
app:menu="#menu/drawer_menu"
app:headerLayout="#layout/drawyer_header"
android:layout_gravity="start"
android:fitsSystemWindows="true"/>
</androidx.drawerlayout.widget.DrawerLayout>
I want to show mapbox mapview in fragment but i cant do that. I looked lots of problems and solutions however i cant solve my issue. App is crashing always. BottomNavigation class is main class, MapFragment is fragment class which i want to see map. Also i attached Xml codes. Thank you!
BottomNavigation.java
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;
public class BottomNavigation extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bottom_navigation);
BottomNavigationView navigation = findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(this);
loadFragment(new MapFragment());
}
private boolean loadFragment(Fragment fragment){
if (fragment != null){
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container,fragment).commit();
return true;
}
return false;
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment fragment = null;
switch (menuItem.getItemId()){
case R.id.navigation_map:
fragment = new MapFragment();
break;
case R.id.navigation_search:
fragment = new SearchFragment();
break;
case R.id.navigation_event:
fragment = new EventsFragment();
break;
case R.id.navigation_profile:
fragment = new ProfileFragment();
break;
}
return loadFragment(fragment);
}
}
MapFragment.java
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.camera.CameraPosition;
import com.mapbox.mapboxsdk.camera.CameraUpdateFactory;
import com.mapbox.mapboxsdk.geometry.LatLng;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
public class MapFragment extends Fragment {
private MapView mapView;
public MapFragment(){
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_map,container,false);
mapView = (MapView) view.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(#NonNull MapboxMap mapboxMap) {
mapboxMap.setStyle(new Style.Builder().fromUrl("mapbox://styles/orucbe/cjqnneisv0gns2ro1fy83ucgl"));
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(41.885, -87.679)) // set the camera's center position
.zoom(12) // set the camera's zoom level
.tilt(20) // set the camera's tilt
.build();
// Move the camera to that position
mapboxMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
});
return view;
}
#Override
public void onResume() {
super.onResume();
mapView.onResume();
}
#Override
public void onPause() {
super.onPause();
mapView.onPause();
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
#Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
#Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
}
activity_bottom_navigation.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".BottomNavigation">
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="56dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
</FrameLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="0dp"
android:layout_marginEnd="0dp"
android:background="?android:attr/windowBackground"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:menu="#menu/navigation" />
</android.support.constraint.ConstraintLayout>
fragment_map.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
>
<com.mapbox.mapboxsdk.maps.MapView
android:id="#+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</com.mapbox.mapboxsdk.maps.MapView>
</android.support.constraint.ConstraintLayout>
Problem is that there is no setted access token. Access token should be set before inflating. That's all.
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
public class MapFragment extends Fragment {
private MapView mapView;
public MapFragment(){
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
Mapbox.getInstance(getContext().getApplicationContext(),"access_token");
View view = inflater.inflate(R.layout.fragment_map,container,false);
mapView = (MapView) view.findViewById(R.id.mapview);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
#Override
public void onMapReady(#NonNull MapboxMap mapboxMap) {
mapboxMap.setStyle(new Style.Builder().fromUrl("style_url"));
}
});
return view;
}
#Override
public void onResume() {
super.onResume();
mapView.onResume();
}
#Override
public void onPause() {
super.onPause();
mapView.onPause();
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
#Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
#Override
public void onDestroyView() {
super.onDestroyView();
mapView.onDestroy();
}
}
Here I have added the Java And Xml File In which I just want to display a Toast when the user clicks on the button.
This is just to check whether the Fragment is working or not.
Here onClickListener is not working for me in the Fragment. Even setText on TextView was not working when I tried. I Think there is sometihing problem with the components or some problem between the connection of java and xml file
Setting.java
package com.example.dell.jsonexp;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class setting extends Fragment {
BackgroundTask b;
String e;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View RootView = inflater.inflate(R.layout.setting, container, false);
final Button logout= (Button) RootView.findViewById(R.id.logout);
logout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getActivity(),"Button Pressed",Toast.LENGTH_LONG).show();
}
});
return inflater.inflate(R.layout.setting, container, false);
}
}
setting.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<Button
android:id="#+id/logout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="50dp"
android:text="Logout" />
</RelativeLayout>
You are setting a click listener to a button that is never shown.
You need to return the rootView instead of inflating another view.
return rootView;
In a Fragment you cant access view components in onCreateView() method, You have to Override onViewCreated() method.
Please update your code as below.
package com.example.dell.jsonexp;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class setting extends Fragment {
BackgroundTask b;
String e;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.setting, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button logout= (Button) view.findViewById(R.id.logout);
logout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getActivity(),"Button Pressed",Toast.LENGTH_LONG).show();
}
});
}
}
Thanks!
You need to return
return RootView;
and for the Toast you have to write
getActivity().runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(getContext(), "Whatever you want here", Toast.LENGTH_SHORT).show();
}
});
I use Android Tab Example with two tabs, view pager and fragments (structure on the image):
For get fragments i use the solution from this post.
When my device is rotation i want to display two fragments at the same time.
I the stackoverflow.com/questions/17970021 a similar problem, but I don't know how to apply the solution to my task, because i have TabLayout.
If you know idea, can you help me?
In activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="16dp"
>
<FrameLayout
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
</FrameLayout>
</FrameLayout>
In MainActivity.java
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.annotation.NonNull;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
replaceFragment(0);
}
public void replaceFragment(int position) {
Fragment fragment = null;
switch (position) {
case 0:
fragment = new TabOneFragment();
break;
case 1:
fragment = new TabTwoFragment();
break;
default:
break;
}
if (null != fragment) {
FragmentManager fragmentManager = MainActivity.this.getSupportFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.replace(R.id.main_content, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
}
in TabOneFragment.java
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
public class TabOneFragment extends Fragment {
private View inflatedView = null;
public TabOneFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
this.inflatedView = inflater.inflate(R.layout.fragment_tab_one, container, false);
return this.inflatedView;
}
}
in TabTwoFragment.java
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
public class TabTwoFragment extends Fragment {
private View inflatedView = null;
public TabTwoFragment() {
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
this.inflatedView = inflater.inflate(R.layout.fragment_tab_two, container, false);
return this.inflatedView;
}
}