Develop Reference

Items on NavigationDrawer are not Clicking

I have used Android Studio's inbuilt Navigation Drawer Activity and only the main fragment seems to be working, The other items in the drawer are not clicking or working. Please help.
MainActivity.java
package com.example.duzol;
import android.content.Intent;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.view.Menu;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.Toast;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.navigation.NavigationView;
import androidx.annotation.NonNull;
import androidx.appcompat.app.ActionBarDrawerToggle;
import androidx.core.view.GravityCompat;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
public class MainActivity extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener {
private AppBarConfiguration mAppBarConfiguration;
private static final int MAIN_FRAGMENT = 0;
private static final int TRACK_FRAGMENT = 1;
private FrameLayout frameLayout;
private NavigationView navigationView;
private DrawerLayout drawerLayout;
private static int currentFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
DrawerLayout drawer = findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar,
R.string.nav_open_drawer, R.string.nav_close_drawer);
drawer.addDrawerListener(toggle);
toggle.syncState();
navigationView = (NavigationView) findViewById(R.id.nav_view);
if (navigationView!=null) {
navigationView.setNavigationItemSelectedListener(this);
}
navigationView.getMenu().getItem(0).setChecked(true);
frameLayout = (FrameLayout) findViewById(R.id.main_frameLayout);
setFragment(new MainFragment(),MAIN_FRAGMENT);
}
#Override
public void onBackPressed() {
DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
if (currentFragment == MAIN_FRAGMENT){ // menu inflates only if user is in main fragment
getMenuInflater().inflate(R.menu.main, menu);
}
return true;
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_bag) {
Toast.makeText(this, "Bag clicked", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
item.setChecked(true);
drawerLayout.closeDrawers();
switch (id) {
case R.id.nav_home:
setFragment(new MainFragment(),MAIN_FRAGMENT);break;
case R.id.nav_track:myTrack();break;
case R.id.nav_appointment:
case R.id.nav_feedback:
Intent intent = new Intent(this, feedBackActivity.class);
startActivity(intent);
break;
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
private void myTrack(){
setFragment(new TrackFragment(),TRACK_FRAGMENT);
navigationView.getMenu().getItem(1).setChecked(true);
}
private void setFragment(Fragment fragment, int fragmentNum){
currentFragment = fragmentNum;
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(frameLayout.getId(),fragment);
ft.commit();
}
}
ActivityMain.xml
I have used Navigation Drawer before but i used it from scratch (i.e. Empty Activity) but now after using the template the same stuff doesn't work. I don't know what I am doing wrong, I have checked it multiple times.
<?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"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.drawerlayout.widget.DrawerLayout>
Activity_main_drawer.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_home"
android:icon="#drawable/ic_baseline_notes_24"
android:title="#string/menu_home" />
<item
android:id="#+id/nav_track"
android:icon="#drawable/ic_baseline_pin_drop_24"
android:title="#string/menu_track" />
<item
android:id="#+id/nav_appointment"
android:icon="#drawable/ic_baseline_timelapse_24"
android:title="#string/menu_appointment" />
</group>
<item android:title="Support">
<group android:checkableBehavior="single">
<item android:id="#+id/nav_feedback"
android:icon="#drawable/ic_baseline_mail_24"
android:title="#string/feedback"/>
</group>
</item>
</menu>

The issue is in your layout.
Change
<androidx.drawerlayout.widget.DrawerLayout>
<com.google.android.material.navigation.NavigationView/>
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.drawerlayout.widget.DrawerLayout>
to:
<androidx.drawerlayout.widget.DrawerLayout>
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<com.google.android.material.navigation.NavigationView/>
</androidx.drawerlayout.widget.DrawerLayout>

Fragment is not being replaced after click in navigation drawer

I tried every way to solve this problem but still I am not getting whats wrong with this code. Can you help me?
My mainpage activity is as
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Gravity;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Toast;
public class MainPage extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private NavigationView mNavigationView;
private FragmentTransaction fragmentTransction;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main_page);
Toolbar toolbar=findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mNavigationView=findViewById(R.id.idnav_view);
ActionBar actionBar=getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
mDrawerLayout=findViewById(R.id.iddrawer_layout);
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment frag=null;
int itemId=menuItem.getItemId();
if(itemId==R.id.id_nvHome){
frag=new HomeFragment();
}
else if(itemId==R.id.id_nvSearch){
frag=new SearchFragment();
}
Toast.makeText(getApplicationContext(),menuItem.getTitle(),Toast.LENGTH_SHORT).show();
if(frag!=null){
FragmentTransaction transction=getSupportFragmentManager().beginTransaction();
transction.replace(R.id.idcontent_frame,frag);
transction.commit();
mDrawerLayout.closeDrawers();
return true;
}
return false;
}
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
}
and for mypage activity layout is
<?xml version="1.0" encoding="utf-8"?>
<!-- Use DrawerLayout as root container for activity -->
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/iddrawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!-- Layout to contain contents of main body of screen (drawer will slide over this) -->
<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:id="#+id/idcontent_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar" />
<!-- Container for contents of drawer - use NavigationView to make configuration easier -->
<android.support.design.widget.NavigationView
android:id="#+id/idnav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="#menu/drawer_view"
app:headerLayout="#layout/nav_header"/>
</android.support.v4.widget.DrawerLayout>
my homefragment is as
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;
public class HomeFragment extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v=inflater.inflate(R.layout.fragment_home,container,false);
return v;
}
}
and also layout for that is as
<?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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomeFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_marginTop="150dp"
android:layout_marginLeft="150dp"
android:textColor="#000000"
android:textSize="30dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="#string/hello_blank_fragment" />
</FrameLayout>
I want to REPLACE FRAGMENT WITH OTHER FRAGMENT WHEN I CLICK ON NAVIGATION DRAWER ITEMS
Can anyone help me?

I can support you giving you my working code for Android 27.1.1:
public class MainActivity extends AppCompatActivity implements
BottomNavigationView.OnNavigationItemSelectedListener {
private int mSelectedId;
/**
* Create Navigation bar and load the main fragment "statistics".
*/
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loadFragment(new FragmentStatistics());
BottomNavigationView navigation = findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(this);
mSelectedId = navigation.getSelectedItemId();
}
/**
* Checks for any event in the Navigation Bar.
* If the item selected is the same as the actual item
* Do nothing
* Else
* Load new fragment selected.
*/
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
Fragment fragment = null;
if (mSelectedId != item.getItemId()) {
mSelectedId = item.getItemId();
switch (item.getItemId()) {
case R.id.statistics:
fragment = new FragmentStatistics();
break;
case R.id.shops:
fragment = new FragmentShops();
break;
}
}
return loadFragment(fragment);
}
private boolean loadFragment(Fragment fragment) {
//switching fragment
if (fragment != null) {
getSupportFragmentManager()
.beginTransaction()
.replace(R.id.fragment_container, fragment)
.commit();
return true;
}
return false;
}
}
The rest of your code is exact as mine.

Switching between fragments with a button in default Navigation Drawer template of Android Studio

I'm using default Navigation Drawer in Android Studio, and I added two fragments for first two button in navigation drawer. Everything works fine and I can switch between these fragments from drawer menu.
But I want to have a simple button in first fragment that clicking on it take me to second fragment. Clicking on such button opens second fragment but it seems to overlap whole screen and disappear the navigation view.
These are my project's codes:
MainActivity.java :
package com.example.arantik.test4;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#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
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
Fragment fragment=null;
if (id == R.id.nav_camera) {
fragment=new Fragment_1();
} else if (id == R.id.nav_gallery) {
fragment=new Fragment_2();
}
android.support.v4.app.FragmentTransaction transaction=getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.mainFrame, fragment);
transaction.addToBackStack(null);
transaction.commit();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
activity_main.xml :
<?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:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
content_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:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.example.arantik.test4.MainActivity"
tools:showIn="#layout/app_bar_main">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/mainFrame">
</FrameLayout>
</android.support.constraint.ConstraintLayout>
Fragment_1.java :
package com.example.arantik.test4;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
public class Fragment_1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_1_layout, container, false);
Button button=(Button)view.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
android.support.v4.app.FragmentManager fragmentManager = getFragmentManager();
android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment_2 fragment_2=new Fragment_2();
fragmentTransaction.replace(android.R.id.content, fragment_2);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
});
return view;
}
}
fragmen_1_layout.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:text="First Fragment"
android:textSize="20sp"/>
<Button
android:layout_width="100dp"
android:layout_height="60dp"
android:id="#+id/button"
android:text="click"/>
</LinearLayout>
Fragment_2.java :
package com.example.arantik.test4;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment_2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.fragment_2_layout, container, false);
return view;
}
}
fragmen_2_layout.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00ff00">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:text="Second Fragment"
android:textSize="20sp"/>
</LinearLayout>
I've not changed other Java or XML codes.

Add a public method to MainActivity, cast getActivity() to MainActivity in your fragment, and then you can invoke the method. You can also use interface, refer Communicating with Other Fragments

Navigation drawer not showing fragment

I am trying to display different fragment when user clicks on any item from navigation drawer. I am not able to display fragment. I am not getting any error message. It's just not displaying fragment.
Layout:
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/drawerlayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- The main content view -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/main_content"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/my_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"/>
<android.support.v7.widget.RecyclerView
android:id="#+id/notes_list"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<!-- The navigation drawer -->
<ListView android:id="#+id/navigationitems"
android:layout_width="240dp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:background="#android:color/darker_gray"
android:dividerHeight="0dp"
/>
</android.support.v4.widget.DrawerLayout>
MainActivity:
package com.example.note.pankajpc.note;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.Toolbar;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.FrameLayout;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import io.realm.Case;
import io.realm.Realm;
import io.realm.RealmChangeListener;
import io.realm.RealmResults;
import io.realm.Sort;
public class MainActivity extends AppCompatActivity {
private ListView mNavigationItem;
private DrawerLayout mDrawerLayout;
private FrameLayout mMainContent;
Intent intent;
String [] mNavigationItemArray;
List <DrawerItem> mDrawerItem = new ArrayList();
private ActionBarDrawerToggle mDrawerToggle;
private RecyclerView mRecyclerView;
private static NoteAdapter mNoteAdapter;
private static Realm mRealm;
private static Context context1;
private RealmResults<NoteModel> mResults;
SearchView mSearchView;
String mSearchString=null;
private ContextMenu contextMenu;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(myToolbar);
Realm.init(this);
context1 = this;
// initAlarm();
mRealm = Realm.getDefaultInstance();
//initialize relam database
initUi();
initDrawerItem();
mRecyclerView = (RecyclerView)findViewById(R.id.notes_list);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
mNoteAdapter = new NoteAdapter(this,mResults,mRealm);
mRecyclerView.setAdapter(mNoteAdapter);
mNavigationItemArray = getResources().getStringArray(R.array.navigation_list);
mNavigationItem = (ListView)findViewById(R.id.navigationitems);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.ic_navigation);
mDrawerToggle = new ActionBarDrawerToggle(this,mDrawerLayout,R.string.app_name,R.string.app_name){
};
mDrawerLayout.addDrawerListener(mDrawerToggle);
//setting custom adapter on Navigation Drawer
mNavigationItem.setAdapter(new CustomDrawerAdapter(this,R.layout.custom_navigation_listview_row,mDrawerItem));
//setting onClick Listener on Navigation Drawer
mNavigationItem.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Fragment fragment = null;
mDrawerLayout.closeDrawers();
switch (mDrawerItem.get(i).getItemName()){
case "Add a Note":
intent = new Intent(MainActivity.this,AddNote.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(intent);
break;
case "Settings":
Toast.makeText(MainActivity.this,"test1",Toast.LENGTH_SHORT).show();
Fragment fragment1 = new TestFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.main_content, fragment1);
ft.commit();
break;
}
}
});
}
private void initAlarm() {
Intent i = new Intent(this,AlarmReceiver.class);
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, i, 0);
AlarmManager am = (AlarmManager)this.getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,200,200,alarmIntent);
}
private void initDrawerItem() {
mDrawerItem.add(new DrawerItem("Notes",R.drawable.ic_notes));
mDrawerItem.add(new DrawerItem("Add a Note",R.drawable.ic_add));
mDrawerItem.add(new DrawerItem("Search",R.drawable.ic_search));
mDrawerItem.add(new DrawerItem("Trash",R.drawable.ic_trash));
mDrawerItem.add(new DrawerItem("Settings",R.drawable.ic_settings));
}
private void initUi() {
mResults = mRealm.where(NoteModel.class).findAllSortedAsync("mNoteDateTime");
}
protected void onStart() {
super.onStart();
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
mResults.addChangeListener(new RealmChangeListener<RealmResults<NoteModel>>() {
#Override
public void onChange(RealmResults<NoteModel> element) {
mNoteAdapter.update(mResults);
}
});
}
#Override
//This override displays the items when action bar up button click
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
//handling the menu clicks on menu.xml
switch (id){
case R.id.actionAdd:
startActivity((new Intent(context1,AddNote.class)).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP));
break;
case R.id.dateCreated:
mResults = mRealm.where(NoteModel.class).findAllSorted("mNoteDateTime");
mNoteAdapter.update(mResults);
break;
case R.id.alphabetically:
mResults = mRealm.where(NoteModel.class).findAllSorted("mNoteTitle");
mNoteAdapter.update(mResults);
break;
case R.id.priority:
mResults = mRealm.where(NoteModel.class).findAllSorted("mNotePriority", Sort.DESCENDING);
mNoteAdapter.update(mResults);
break;
}
return true;
}
#Override
public boolean onCreateOptionsMenu(final Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
mSearchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
mSearchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
String query = newText.toLowerCase();
mResults = mRealm.where(NoteModel.class).contains("mNoteTitle", query, Case.INSENSITIVE).findAllSorted("mNoteDateTime");
mNoteAdapter.update(mResults);
return false;
}
});
return true;
}
#Override
protected void onStop() {
super.onStop();
resetSearchView();
}
#Override
public void onBackPressed() {
super.onBackPressed();
resetSearchView();
}
private void resetSearchView() {
mSearchView.clearFocus();
mSearchView.setQuery("", false);
mSearchView.setFocusable(false);
mSearchView.onActionViewCollapsed();
}
}
Fragment:
package com.example.note.pankajpc.note;
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;
/**
* Created by Pankaj PC on 01-08-2017.
*/
public class TestFragment extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.add_note,container,false);
}
}

You can't use a Linearlayout to store your fragments, its needs to be a Framelayout where you need to add the fragments
This is how I always setup my Navigation Drawer:
<?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:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:theme="#style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize" />
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="#+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/appbar_layout" />
</RelativeLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>

Adding Tabs to Fragment of navigationDrawer

So i know there have been plenty of answered questions about my problem, but i dont know why its not working
The Navigation drawer is working as intenden but im struggling with implementing the tabs. When i created the project i selected the drawer activity at the start if this helps
thx for the help
Sooo, i cleaned up the code and implemented the newer version, for future problems i will post all my code
This ist the Main Activity
package com.example.myapplicationteeeeeeeeeest;
import android.os.Bundle;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import android.view.View;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;
import com.google.android.material.navigation.NavigationView;
import androidx.drawerlayout.widget.DrawerLayout;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import android.view.Menu;
public class MainActivity extends AppCompatActivity {
private AppBarConfiguration mAppBarConfiguration;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate( savedInstanceState );
setContentView( R.layout.activity_main );
Toolbar toolbar = findViewById( R.id.toolbar );
setSupportActionBar( toolbar );
FloatingActionButton fab = findViewById( R.id.fab );
fab.setOnClickListener( new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make( view, "Replace with your own action", Snackbar.LENGTH_LONG )
.setAction( "Action", null ).show();
}
} );
DrawerLayout drawer = findViewById( R.id.drawer_layout );
NavigationView navigationView = findViewById( R.id.nav_view );
// Passing each menu ID as a set of Ids because each
// menu should be considered as top level destinations.
mAppBarConfiguration = new AppBarConfiguration.Builder(
R.id.nav_home, R.id.nav_gallery, R.id.nav_slideshow,
R.id.nav_tools, R.id.nav_share, R.id.nav_send )
.setDrawerLayout( drawer )
.build();
NavController navController = Navigation.findNavController( this, R.id.nav_host_fragment );
NavigationUI.setupActionBarWithNavController( this, navController, mAppBarConfiguration );
NavigationUI.setupWithNavController( navigationView, navController );
}
#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 onSupportNavigateUp() {
NavController navController = Navigation.findNavController( this, R.id.nav_host_fragment );
return NavigationUI.navigateUp( navController, mAppBarConfiguration )
|| super.onSupportNavigateUp();
}
}
The Layout for Main Activity
<?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"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<com.google.android.material.navigation.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.drawerlayout.widget.DrawerLayout>
This is the Fragment where i want to add the tabs (Gallery Fragment)
package com.example.myapplicationteeeeeeeeeest.ui.gallery;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TabHost;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTabHost;
import androidx.lifecycle.ViewModelProviders;
import androidx.viewpager.widget.ViewPager;
import com.example.myapplicationteeeeeeeeeest.MainActivity;
import com.example.myapplicationteeeeeeeeeest.R;
import com.google.android.material.tabs.TabLayout;
public class GalleryFragment extends Fragment {
private GalleryViewModel galleryViewModel;
private ViewPager viewPager;
private TapAdapter tapAdapter;
private TabLayout tabLayout;
public View onCreateView(#NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
galleryViewModel =
ViewModelProviders.of( this ).get( GalleryViewModel.class );
View root = inflater.inflate( R.layout.fragment_gallery, container, false );
viewPager = (ViewPager) root.findViewById(R.id.viewPager);
tabLayout = (TabLayout) root.findViewById(R.id.tabLayout);
tapAdapter = new TapAdapter( this,getChildFragmentManager() );
tapAdapter.addFragment(new ShoppingListTab(), "Shopping List");
tapAdapter.addFragment(new RecipeTab(), "Receipt List");
viewPager.setAdapter(tapAdapter);
tabLayout.setupWithViewPager(viewPager);
return root;
}
}
The Layout File of the Gallery Fragment
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.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:context=".MainActivity">
<androidx.viewpager.widget.ViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
<com.google.android.material.tabs.TabLayout
android:id="#+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
The Two tab Fragments (RecipeTab and ShoppingListTab)
package com.example.myapplicationteeeeeeeeeest.ui.gallery;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.fragment.app.Fragment;
import com.example.myapplicationteeeeeeeeeest.R;
public class RecipeTab extends GalleryFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view1 = inflater.inflate( R.layout.tab_fragment_one, container, false );
return view1;
}
}
package com.example.myapplicationteeeeeeeeeest.ui.gallery;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.myapplicationteeeeeeeeeest.R;
public class ShoppingListTab extends GalleryFragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view1 = inflater.inflate( R.layout.tab_fragment_two, container, false );
return view1;
}
}
The Layout Files of the two Tabs
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
and the tapAdapter
package com.example.myapplicationteeeeeeeeeest.ui.gallery;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import java.util.ArrayList;
import java.util.List;
public class TapAdapter extends FragmentStatePagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
TapAdapter(GalleryFragment galleryFragment, FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
#Override
public int getCount() {
return mFragmentList.size();
}
}
I hope i havent missed anything