App Crashes when replacing Android Fragments, android studio

App Crashes when replacing Android Fragments, android studio - java

I am new to android programming and I am trying to write a simple application that switches between two Fragments. I started a new project with a blank activity template that already included a Fragment. I think this could be where I am going wrong, but I am lost. Every time I launch and click the button the app crashes. It throws a must implement OnFragmentInteractionListener error from MyFragment2's onAttach method. If I comment that method out it add's the new Fragment on top of the old one. I have been through just about every tutorial I can find. I do not see where my code is going wrong. I'm sure it is something easy and I am going to feel pretty stupid when I finally figure it out. Any help would be appreciated. Thanks in advance.
My main activity:
package com.example.misanthropic.fragments;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
public class Main extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// matically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void buttonClicked(View v){
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment2 myFragment = new Fragment2();
fragmentTransaction.replace(R.id.fragment_main, myFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}
The MyFragment2 I would like to swap in:
package com.example.misanthropic.fragments;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link Fragment2.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link Fragment2#newInstance} factory method to
* create an instance of this fragment.
*
*/
public class Fragment2 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;
/**
* 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 Fragment2.
*/
// TODO: Rename and change types and number of parameters
public static Fragment2 newInstance(String param1, String param2) {
Fragment2 fragment = new Fragment2();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
public Fragment2() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_fragment2, 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(Activity activity) {
super.onAttach(activity);
try {
mListener = (OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.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
public void onFragmentInteraction(Uri uri);
}
}
My main xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Main"
tools:ignore="MergeRootFrame" />
My Initial Fragment XML:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context=".Main$PlaceholderFragment"
android:id="#+id/fragment_main">
<TextView
android:text="#string/hello_world"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/textView" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="#+id/button"
android:layout_below="#+id/textView"
android:layout_centerHorizontal="true"
android:layout_marginTop="165dp"
android:onClick="buttonClicked" />
</RelativeLayout>
The replacement Fragment XML:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.misanthropic.fragments.Fragment2">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment" />
</FrameLayout>

Figured it out. I was calling the wrong id in the replace method.
fragmentTransaction.replace(R.id.fragment_main, myFragment);
should have been:
fragmentTransaction.replace(R.id.container, myFragment);

Related

Imageview to VideoView using fragment

I am trying to make an app with navigation drawer using fragment, where on the home screen there should be images and when you click the image it should take you to that particular image's fragment and video starts playing. But unfortunately I can't see any image on the home screen (maybe I am making mistake in layout). Please help me out. Thanks in advance.
Code below :-
main xml file
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.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:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/drawer_layout"
android:fitsSystemWindows="true"
tools:context="com.hangout.google.heedbasketball.MainActivity"
tools:openDrawer="start"
tools:deviceIds= "tv"
tools:ignore="MergeRootFrame">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimaryDark"
android:id="#+id/toolbar"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
android:elevation="4dp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/i1"
android:src="#drawable/arena_reaction"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/i2"
android:src="#drawable/frequentflyer_diop"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/i3"
android:src="#drawable/frequentflyer_tyus"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragement_container" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:id="#+id/nav_view"
app:headerLayout="#layout/nav_header"
app:menu="#menu/drawer_menu"/>
</android.support.v4.widget.DrawerLayout>
main java file
package com.hangout.google.heedbasketball;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
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.MenuItem;
abstract class MainActivity4 extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = findViewById(R.id.drawer_layout);
NavigationView navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this );
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle
(this,drawer,toolbar,R.string.navigation_drawer_open,R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
}
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.nav_sound:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new SoundFragment()).commit();
break;
case R.id.nav_notifications:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new NotificationsFragment()).commit();
break;
case R.id.nav_sponsors:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new SponsorsFragment()).commit();
break;
case R.id.nav_about:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new AboutFragment()).commit();
break;
case R.id.nav_contact_us:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new ContactusFragment()).commit();
break;
case R.id.nav_privacy:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new PrivacyFragment()).commit();
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
public class SectionPagerAdapter extends FragmentPagerAdapter {
public SectionPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
Fragment fragment = null;
switch (position) {
case 0:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new FirstFragment()).commit();
fragment = new FirstFragment();
break;
case 1:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new SecondFragment()).commit();
fragment = new SecondFragment();
case 2:
getSupportFragmentManager().beginTransaction().replace(R.id.fragement_container,new ThirdFragment()).commit();
fragment = new ThirdFragment();
break;
default:
fragment = new FirstFragment();
}
return fragment;
}
#Override
public int getCount() {
return 3;
}
}
public void onBackpressed() {
if (drawer.isDrawerOpen(GravityCompat.START)){
drawer.closeDrawer(GravityCompat.START);
} else {
onBackPressed();
}
}
}
Here is the java fragment for one video I have defined in the same way for other videos too
package com.hangout.google.heedbasketball;
import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.VideoView;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link FirstFragment.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link FirstFragment#newInstance} factory method to
* create an instance of this fragment.
*/
public class FirstFragment 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 FirstFragment() {
// 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 FirstFragment.
*/
// TODO: Rename and change types and number of parameters
public static FirstFragment newInstance(String param1, String param2) {
FirstFragment fragment = new FirstFragment();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
//My video code here
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
VideoView v1 = (VideoView) findViewById(R.id.v1);
v1.setVideoURI(Uri.parse("https://myvideo.mp4"));
v1.start();
v1.requestFocus();
v1.setKeepScreenOn(true);
}
}
private Object findViewById(int v1) {
return 0;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_first, 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;
}
/**
* 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);
}
}
xml file fragment for the video
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".FirstFragment"
android:background="#color/colorPrimaryDark">
<!-- TODO: Update blank fragment layout -->
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/v1" />
</RelativeLayout>

You have created findViewById function in on create which returns 0.
You need a video reference from layout which you are inflating.
Something similar to this.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_first, container, false);
// see the difference
VideoView v1 = (VideoView) view.findViewById(R.id.v1);
v1.setVideoURI(Uri.parse("https://myvideo.mp4"));
v1.start();
v1.requestFocus();
v1.setKeepScreenOn(true);
return view;
}

How to call a fragment from menu

I am very new to java and android development. So, even after reading many tutorials(e.g. this, this), I can't figure out how to call a fragment from a bottomnevigationmenu item.
Currently, I have:
MainActivity.java
package com.example.myapplication;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private void loadCalFragment() {
String string1="Hello",string2 = "Hii";
CalFragment fragment = CalFragment.newInstance(string1,string2);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_frame, fragment);
ft.commit();
}
private TextView mTextMessage;
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Context context = getApplicationContext();
switch (item.getItemId()) {
case R.id.navigation_home:
mTextMessage.setText(R.string.title_home);
Toast toasth = Toast.makeText(context , R.string.title_home, Toast.LENGTH_LONG);
toasth.show();
return true;
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
Toast toastd = Toast.makeText(context , R.string.title_dashboard, Toast.LENGTH_LONG);
toastd.show();
loadCalFragment();
return true;
case R.id.navigation_notifications:
mTextMessage.setText(R.string.title_location);
Toast toastn = Toast.makeText(context , R.string.title_location, Toast.LENGTH_LONG);
toastn.show();
return true;
}
return false;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextMessage = (TextView) findViewById(R.id.message);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
}
activaty_main.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="com.example.myapplication.MainActivity">
<TextView
android:id="#+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/activity_horizontal_margin"
android:layout_marginStart="#dimen/activity_horizontal_margin"
android:layout_marginTop="#dimen/activity_vertical_margin"
android:text="#string/title_home"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="0dp"
android:layout_marginStart="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>
Now, when I am adding a fragment using android-studio, it has created the xml file. My target is to create a datepicker in this fragment and show it. But, I don't know how to do that.
fragment_cal.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.myapplication.CalFragment">
<!-- TODO: Update blank fragment layout -->
<DatePicker
android:id="#+id/datePicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:calendarViewShown="false"
android:datePickerMode="spinner" />
</FrameLayout>
and a corresponding java file:
calFragment.java
package com.example.myapplication;
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;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link CalFragment.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link CalFragment#newInstance} factory method to
* create an instance of this fragment.
*/
public class CalFragment 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 CalFragment() {
// 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 CalFragment.
*/
// TODO: Rename and change types and number of parameters
public static CalFragment newInstance(String param1, String param2) {
CalFragment fragment = new CalFragment();
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
return inflater.inflate(R.layout.fragment_cal, 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;
}
/**
* 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);
}
}
My AndroidManifest.xml is:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
When I am trying to attach the CalFragment() call to the nevigation menu as:
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
Toast toastd = Toast.makeText(context , R.string.title_dashboard, Toast.LENGTH_LONG);
toastd.show();
CalFragment();
return true;
its giving error: Error:(32, 21) error: cannot find symbol method CalFragment()
I will be grateful if somebody kindly help me in it.

You are using same name for fragment CalFragment() and method CalFragment()
change to below:
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
Toast toastd = Toast.makeText(context , R.string.title_dashboard, Toast.LENGTH_LONG);
toastd.show();
loadCalFragment();
return true;
When your are calling fragment, create loadCalFragment(); method
Create method like below in your Activity class , you are not passing two string values to your fragment newInstance pass using CalFragment fragment = CalFragment.newInstance(string1,string2); pass your actual data here i used demo data:
private void loadCalFragment() {
String string1,string2 = "Hii"
CalFragment fragment = CalFragment.newInstance(string1,string2);
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_frame, fragment);
ft.commit();
}
Update your code from my Code (Activity):
package com.example.myapplication;
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private TextView mTextMessage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextMessage = (TextView) findViewById(R.id.message);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Context context = getApplicationContext();
switch (item.getItemId()) {
case R.id.navigation_home:
mTextMessage.setText(R.string.title_home);
Toast toasth = Toast.makeText(context , R.string.title_home, Toast.LENGTH_LONG);
toasth.show();
return true;
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
Toast toastd = Toast.makeText(context , R.string.title_dashboard, Toast.LENGTH_LONG);
toastd.show();
loadCalFragment();
return true;
case R.id.navigation_notifications:
mTextMessage.setText(R.string.title_location);
Toast toastn = Toast.makeText(context , R.string.title_location, Toast.LENGTH_LONG);
toastn.show();
return true;
}
return false;
}
};
private void loadCalFragment() {
CalFragment fragment = CalFragment();
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.replace(R.id.fragment_frame, fragment);
ft.commit();
}
}
And CalFragment Code Here :
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* A simple {#link Fragment} subclass.
*/
public class CalFragment extends Fragment {
public CalFragment() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_cal, container, false);
}
}

Here is the full answer.
activity_main.xml
<android.support.design.widget.CoordinatorLayout
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:showIn="#layout/app_tab_bar">
<FrameLayout
android:id="#+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
app_tab_bar.xml
<android.support.design.widget.CoordinatorLayout
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">
<include layout="#layout/activity_main" />
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="?android:attr/windowBackground"
app:itemBackground="#android:color/white"
android:foreground="?attr/selectableItemBackground"
app:itemIconTint="#color/colorAccent"
app:itemTextColor="#color/colorAccent"
app:menu="#menu/navigation" />
</android.support.design.widget.CoordinatorLayout>
MainActivity.java
protected void onCreate(Bundle savedInstanceState) {
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
// load the first fragment by default
loadFragment(new Frag_one());
}
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Fragment fragment;
switch (item.getItemId()) {
case R.id.navigation_explore:
fragment = new Frag_one();
loadFragment(fragment);
return true;
case R.id.navigation_saved:
fragment = new Frag_two();
loadFragment(fragment);
return true;
case R.id.navigation_inbox:
fragment = new Frag_three();
loadFragment(fragment);
return true;
case R.id.navigation_profile:
fragment = new Frag_four();
loadFragment(fragment);
return true;
}
return false;
}
};
private void loadFragment(Fragment fragment) {
// load fragment
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_container, fragment);
transaction.addToBackStack(null);
transaction.commit();
}
In order to display a fragment you have to define a container in xml file.
Framelayout serves as placeholder for your fragments. So in your mainactivity.xml you need to define the container as I did in my code.

Fragment overlapping another fragment instead of replacing it

The setup I have is a main_activity fragment that just has welcome text, and when you tap the start button, it's supposed to switch fragments. Instead of replacing the current fragment, it just overlays it on top of the main_activity fragment and won't allow me to perform the action associated with the new fragment.
Main Activity example
quote_fragment overlapping main activity
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_activity"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="false"
android:contextClickable="false"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="me.alexoladele.quotebook.MainActivity">
<TextView
android:id="#+id/welcome_screen_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="144dp"
android:gravity="center"
android:text="#string/welcome_screen_text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="36sp" />
<Button
android:id="#+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="47dp"
android:clickable="true"
android:enabled="true"
android:text="#string/start_button" />
</FrameLayout>
ActivityMain.java
package me.alexoladele.quotebook;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
int count = 0;
final QuoteFragment quoteFragment = new QuoteFragment();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button startButton = (Button) findViewById(R.id.start_button);
final TextView welcomeText = (TextView) findViewById(R.id.welcome_screen_text);
if (startButton != null)
startButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startSecondFragment(); // start your fragment from MainActivity
//startButton.setVisibility(v.GONE);
//welcomeText.setVisibility(v.GONE);
}
});
}
// This method will be in charge of handling your second fragment
private void startSecondFragment() {
android.support.v4.app.FragmentManager manager = getSupportFragmentManager();
manager.beginTransaction()
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.replace(R.id.main_activity, quoteFragment)
.commit();
}
}
quote_fragment.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/quote_frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:contextClickable="true">
<TextView
android:id="#+id/quote"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="sans-serif-medium"
android:gravity="center"
android:text="#string/tap_screen"
android:textColor="#a6a6a6"
android:textSize="26sp" />
<TextView
android:id="#+id/person"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:fontFamily="sans-serif-medium"
android:gravity="center"
android:text="#string/quotist_name"
android:textColor="#585858"
android:textSize="26sp"
android:visibility="visible" />
</FrameLayout>
QuoteFragment.java:
package me.alexoladele.quotebook;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
//import android.support.v4.app.Fragment;
public class QuoteFragment extends android.support.v4.app.Fragment {
int count = 0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.quote_fragment,container, false);
FrameLayout touch = (FrameLayout) v.findViewById(R.id.main_activity);
final TextView quoteText = (TextView) v.findViewById(R.id.quote);
// Makes quotes array
//region Description
String[] quotes = {
(Quotes go here, but I didn't put them here to save space)
};
//endregion
// Put quotes array into arraylist
final List<String> quoteList = new ArrayList<>(Arrays.asList(quotes));
//
if (touch != null)
touch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (count >= quoteList.size()) {
count = 0;
}
Quote q = new Quote("");
q.setQuote(quoteList.get(count));
quoteText.setText(q.getQuote());
count++;
v.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
}
});
// Inflate the layout for this fragment
return inflater.inflate(R.layout.quote_fragment, container, false);
}
}
welcome_screen_fragment:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:context="me.alexoladele.quotebook.WelcomeScreen">
<TextView
android:id="#+id/welcome_screen_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="144dp"
android:gravity="center"
android:text="#string/welcome_screen_text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="36sp" />
<Button
android:id="#+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="47dp"
android:clickable="true"
android:enabled="true"
android:text="#string/start_button" />
</FrameLayout>
WelcomeScreen.java:
package me.alexoladele.quotebook;
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;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link WelcomeScreen.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link WelcomeScreen#newInstance} factory method to
* create an instance of this fragment.
*/
public class WelcomeScreen 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 WelcomeScreen() {
// 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 WelcomeScreen.
*/
// TODO: Rename and change types and number of parameters
public static WelcomeScreen newInstance(String param1, String param2) {
WelcomeScreen fragment = new WelcomeScreen();
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
return inflater.inflate(R.layout.welcome_screen_fragment, 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;
}
*//**
* 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);
}*/
}

Don't replace your top-level view group. Create an empty frame layout inside of the top-level frame layout and use that as the ID to replace.
If you have elements in the main layout you no longer want visible you'll have to hide them (or use a fragment to show them in the first place which will get replaced).

Fragment being displayed, overlaps current fragment instead of replacing it

UPDATE:
Still having the same problem, but I've added a fragment into the main_activity
welcome_screen_fragment:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
tools:context="me.alexoladele.quotebook.WelcomeScreen">
<TextView
android:id="#+id/welcome_screen_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="144dp"
android:gravity="center"
android:text="#string/welcome_screen_text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="36sp" />
<Button
android:id="#+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="47dp"
android:clickable="true"
android:enabled="true"
android:text="#string/start_button" />
</FrameLayout>
WelcomeScreen.java:
package me.alexoladele.quotebook;
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;
/**
* A simple {#link Fragment} subclass.
* Activities that contain this fragment must implement the
* {#link WelcomeScreen.OnFragmentInteractionListener} interface
* to handle interaction events.
* Use the {#link WelcomeScreen#newInstance} factory method to
* create an instance of this fragment.
*/
public class WelcomeScreen 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 WelcomeScreen() {
// 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 WelcomeScreen.
*/
// TODO: Rename and change types and number of parameters
public static WelcomeScreen newInstance(String param1, String param2) {
WelcomeScreen fragment = new WelcomeScreen();
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
return inflater.inflate(R.layout.welcome_screen_fragment, 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;
}
*//**
* 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);
}*/
}
ORIGINAL:
The setup I have is a main_activity fragment that just has welcome text, and when you tap the start button, it's supposed to switch fragments. Instead of replacing the current fragment, it just overlays it on top of the main_activity fragment and won't allow me to perform the action associated with the new fragment.
Main Activity example
quote_fragment overlapping main activity
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/main_activity"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="false"
android:contextClickable="false"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="me.alexoladele.quotebook.MainActivity">
<TextView
android:id="#+id/welcome_screen_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|top"
android:layout_marginTop="144dp"
android:gravity="center"
android:text="#string/welcome_screen_text"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="36sp" />
<Button
android:id="#+id/start_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:layout_marginBottom="47dp"
android:clickable="true"
android:enabled="true"
android:text="#string/start_button" />
</FrameLayout>
ActivityMain.java
package me.alexoladele.quotebook;
import android.os.Bundle;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
int count = 0;
final QuoteFragment quoteFragment = new QuoteFragment();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button startButton = (Button) findViewById(R.id.start_button);
final TextView welcomeText = (TextView) findViewById(R.id.welcome_screen_text);
if (startButton != null)
startButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startSecondFragment(); // start your fragment from MainActivity
//startButton.setVisibility(v.GONE);
//welcomeText.setVisibility(v.GONE);
}
});
}
// This method will be in charge of handling your second fragment
private void startSecondFragment() {
android.support.v4.app.FragmentManager manager = getSupportFragmentManager();
manager.beginTransaction()
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.replace(R.id.main_activity, quoteFragment)
.commit();
}
}
quote_fragment.xml:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/quote_frag"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:contextClickable="true">
<TextView
android:id="#+id/quote"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="sans-serif-medium"
android:gravity="center"
android:text="#string/tap_screen"
android:textColor="#a6a6a6"
android:textSize="26sp" />
<TextView
android:id="#+id/person"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:fontFamily="sans-serif-medium"
android:gravity="center"
android:text="#string/quotist_name"
android:textColor="#585858"
android:textSize="26sp"
android:visibility="visible" />
</FrameLayout>
QuoteFragment.java:
package me.alexoladele.quotebook;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
//import android.support.v4.app.Fragment;
public class QuoteFragment extends android.support.v4.app.Fragment {
int count = 0;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.quote_fragment,container, false);
FrameLayout touch = (FrameLayout) v.findViewById(R.id.main_activity);
final TextView quoteText = (TextView) v.findViewById(R.id.quote);
// Makes quotes array
//region Description
String[] quotes = {
(Quotes go here, but I didnt put them here to save space)
};
//endregion
// Put quotes array into arraylist
final List<String> quoteList = new ArrayList<>(Arrays.asList(quotes));
//
if (touch != null)
touch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (count >= quoteList.size()) {
count = 0;
}
Quote q = new Quote("");
q.setQuote(quoteList.get(count));
quoteText.setText(q.getQuote());
count++;
v.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
return true;
}
});
}
});
// Inflate the layout for this fragment
return inflater.inflate(R.layout.quote_fragment, container, false);
}
}

Android Fragments for tabbed menu

Im struggling to add additional fragments to a Tabbed Menu Navigation in my Android App. I've used the default 'Scrollable Tabs + Swipe' provided by ADT.
Below is my MainMenu.java
package com.example.universitybudget_v2_1;
import java.util.Locale;
import com.example.universitybudget_v2.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class MainMenu extends FragmentActivity {
/**
* The {#link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {#link android.support.v4.app.FragmentPagerAdapter} derivative, which
* will keep every loaded fragment in memory. If this becomes too memory
* intensive, it may be best to switch to a
* {#link android.support.v4.app.FragmentStatePagerAdapter}.
*/
SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {#link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_menu);
// Create the adapter that will return a fragment for each of the three
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(
getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
/**
* A {#link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a DummySectionFragment (defined as a static inner class
// below) with the page number as its lone argument.
Fragment fragment = new DummySectionFragment();
Bundle args = new Bundle();
args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1);
fragment.setArguments(args);
return fragment;
}
#Override
public int getCount() {
// Show 3 total pages.
return 3;
}
#Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
case 2:
return getString(R.string.title_section3).toUpperCase(l);
}
return null;
}
}
/**
* A dummy fragment representing a section of the app, but that simply
* displays dummy text.
*/
public static class DummySectionFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
public static final String ARG_SECTION_NUMBER = "section_number";
public DummySectionFragment() {
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_1, container, false);
TextView dummyTextView = (TextView) rootView.findViewById(R.id.section_label);
dummyTextView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
return rootView;
}
}
}
activity_main_menu.xml
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainMenu"
android:background="#398940">
<!--
This title strip will display the currently visible page title, as well as the page
titles for adjacent pages.
-->
<android.support.v4.view.PagerTitleStrip
android:id="#+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="#33b5e5"
android:paddingBottom="4dp"
android:paddingTop="4dp"
android:textColor="#fff" />
</android.support.v4.view.ViewPager>
Fragment_1.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainMenu$DummySectionFragment"
android:background="#398940">
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/section_label"
android:layout_centerHorizontal="true"
android:text="#string/celebrate"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
Fragment_2.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainMenu$DummySectionFragment"
android:background="#398940">
<TextView
android:id="#+id/section_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/section_label"
android:layout_centerHorizontal="true"
android:text="#string/celebrate2"
android:textAppearance="?android:attr/textAppearanceLarge" />
</RelativeLayout>
My Question is how do I add fragment_2.xml to the slidable tabs menu? I've looked around but most of the examples use 'ActionBarSherlock' which I don't feel the necessity to use to make a working slidable menu and would rather stay with the android default options.
Currently this is all that is=t shows -
I want different sections to display different fragments, your help would be much appreciated! thanks in advance :)

SectionsPagerAdapter.getItem controls which Fragment is retrieved for each page:
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return getFragment1Instance();
case 1:
return getFragment2Instance();
// etc
}
}

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

App Crashes when replacing Android Fragments, android studio - java

Figured it out. I was calling the wrong id in the replace method. fragmentTransaction.replace(R.id.fragment_main, myFragment); should have been: fragmentTransaction.replace(R.id.container, myFragment);

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