Develop Reference

How can I implement my custom toolbar in my Fragment

I read so much article and watched so many videos but I still don't know, how to set up an action bar in an Fragment. I have a activity X with an custom toolbar and one navigation view on the top left(the toolbar is separated in an xml file), I import it in the xml for the activity X.
Here is my toolbar in one single 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/drawerChooser"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/new_gradients"
android:fitsSystemWindows="true"
tools:context=".ChoosingActivity">
<!--tools:openDrawer="start"-->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</LinearLayout>
<FrameLayout
android:id="#+id/fragment_container_toolbar"
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"
app:headerLayout="#layout/header"
app:menu="#menu/drawer_menu">
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
EDIT, new toolbar:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:background="#drawable/new_gradients"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/new_gradients"
android:fitsSystemWindows="true"
tools:context=".ChoosingActivity">
<FrameLayout
android:id="#+id/fragment_container_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.DrawerLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/header"
app:menu="#menu/drawer_menu">
</android.support.design.widget.NavigationView>
</LinearLayout>
</LinearLayout>
Here is my activity X:
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.support.annotation.NonNull;
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.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class ChoosingActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
public void userChoosed(View view) {
Intent choosedIntent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(choosedIntent);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choosing);
Toolbar toolbar = findViewById(R.id.toolbarxml);
setSupportActionBar(toolbar);
drawer = findViewById(R.id.drawerChooser);
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 item) {
// Item will be Selected
switch (item.getItemId()) {
case R.id.nav_meetings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new Ausstehende_Treffen_Fragment()).commit();
break;
case R.id.nav_finished_meetings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new Abgeschlossene_Treffen_Fragment()).commit();
break;
case R.id.nav_rate:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new Treffen_Bewerten_Fragment()).commit();
break;
case R.id.nav_edit_profile:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new Profil_Bearbeiten_Fragment()).commit();
break;
case R.id.nav_settings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, new Einstellungen_Fragment()).commit();
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
}
EDIT, new activity X ( look at my comment "Toolbar_chooser or toolbar"):
public class ChoosingActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
public void userChoosed(View view) {
Intent choosedIntent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(choosedIntent);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choosing);
Toolbar toolbar = findViewById(R.id.toolbar_chooser); // Toolbar_chooser or toolbar?
setSupportActionBar(toolbar);
drawer = findViewById(R.id.drawerChooser);
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 item) {
// Item will be Selected
switch (item.getItemId()) {
case R.id.nav_meetings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_toolbar, new Ausstehende_Treffen_Fragment()).commit();
break;
case R.id.nav_finished_meetings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_toolbar, new Abgeschlossene_Treffen_Fragment()).commit();
break;
case R.id.nav_rate:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_toolbar, new Treffen_Bewerten_Fragment()).commit();
break;
case R.id.nav_edit_profile:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_toolbar, new Profil_Bearbeiten_Fragment()).commit();
break;
case R.id.nav_settings:
getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_toolbar, new Einstellungen_Fragment()).commit();
break;
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
}
And here my Fragment where I want to add the toolbar with the navigation view:
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class Ausstehende_Treffen_Fragment extends Fragment {
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_ausstehende_treffen,container,false);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
((AppCompatActivity)getActivity()).getSupportActionBar(toolbar); // HOW???
}
}
EDIT, new Fragment:
public class Ausstehende_Treffen_Fragment extends Fragment {
// Toolbar toolbar = (Toolbar) getActivity().findViewById(R.id.toolbarreal);
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_ausstehende_treffen,container,false);
}
#Override
public void onViewCreated(#NonNull View view, #Nullable Bundle savedInstanceState) {
Toolbar toolbar = ((ChoosingActivity)getActivity()).findViewById(R.id.toolbar_ausstehende_treffen);
}
}
Here is also my xml for the fragment, where I want to have the toolbar:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_orange_light">
<include
android:id="#+id/toolbar_ausstehende_treffen"
layout= "#layout/toolbar"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Ausstehende Treffen Fragment"
android:textSize="25sp"
android:layout_centerInParent="true"/>
</RelativeLayout>
Im not able anymore to open my navigation bar in my choosing activity and I don't know why..
I include the toolbars manually in the xml files, its necessary right? + some code in the fragment itself. Man I hope you understand my code and my problems. Pls help me I just want to keep my custom toolbar in any fragment and activity.
Pls help me, its so frustrating, waste so many hours for just a toolbar, which already exists..

Try adding toolbar in you activity :
mTopToolbar = (Toolbar) findViewById(R.id.my_toolbar);
setSupportActionBar(mTopToolbar);
Get the Activity that owns the fragment (Fragment.getActivity()) and set its ActionBar property.
Then juse use the same setDisplayHomeAsUpEnabled method you mentioned to begin with on the ActionBar after setting your toolbar as the ActionBar to get the back / up button.
sample to access it from fragment :
((AppCompatActivity)getActivity()).getSupportActionBar().setSubtitle();
Hope it helps.

As simple as this.
Toolbar toolbar = ((ChoosingActivity)getActivity()).findViewById(R.id.toolbar);
Now do whatever you want to do man ;).

It's probably because your Toolbar is covered by everything else in DrawerLayout. Try swapping LinearLayout and DrawerLayout, so that the vertical LinearLayout is your root layout, something like this:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="#color/colorPrimary"
android:elevation="4dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawerChooser"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/new_gradients"
android:fitsSystemWindows="true"
tools:context=".ChoosingActivity">
<FrameLayout
android:id="#+id/fragment_container_toolbar"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.DrawerLayout>
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/header"
app:menu="#menu/drawer_menu">
</android.support.design.widget.NavigationView>
</LinearLayout>
Something approximately like that, the key is that your Toolbar has to be outside your DrawerLayout.

How to force the buttons in bottom navigation to be at the bottom in android studio

I am trying to use bottom navigation but the buttons or icons appears in the middle not in the bottom, I have use drawer navigation in the same activity i.e. I declare a drawer layout in the xml resource layout.
?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/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Hello"/>
</LinearLayout>
<android.support.design.widget.BottomNavigationView
android:id="#+id/navigation"
android:layout_width="168dp"
android:layout_height="168dp"
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.design.widget.NavigationView
android:layout_width="match_parent"
android:layout_height="match_parent"
app:menu="#menu/drawer"
android:layout_gravity="start">
</android.support.design.widget.NavigationView>
The code of this activity:
package com.example.welcome.madrasti;
import android.content.ClipData;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private TextView mTextMessage;
Intent intent1;
private DrawerLayout d;
private ActionBarDrawerToggle a;
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_dashboard:
return true;
case R.id.navigation_home:
return true;
}
return false;
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
d = (DrawerLayout) findViewById(R.id.container);
a= new ActionBarDrawerToggle(MainActivity.this,d,R.string.open,R.string.close);
d.addDrawerListener(a);
a.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
intent1= new Intent(getApplicationContext(),MapsActivity.class);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(a.onOptionsItemSelected(item)){
return true;
}
return super.onOptionsItemSelected(item);
}
}
Is there any idea ?. I have got the bottom navigation as follows : here

Changing padding at the Bottom to small a value like:
android:paddingBottom="2dp"
Also your BottomNavigationView appears to be a square of 168dp size. Is this intentionally? Change the height it or view its layout bounds. It may be very big by itself like a square.

when adding navigation drawer to the application. this does not work

Since a few days ago I decided to program for Android and buy a book about that. There are several examples and I have achieved them satisfactorily but at the moment of programming the navigation drawer and running it on my cell phone it appears that it closed unfortunately. In the console of Android Studio does not appear any error and I was reviewing codes, example, etc and I have not been able to solve the problem.
Here you can see part of the application code to create and initialize the toolbar and the drawer layout
package com.example.luisenrique.clase_aplicacion;
import android.content.SharedPreferences;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import com.example.luisenrique.clase_aplicacion.fragments.DetalleFragment;
import com.example.luisenrique.clase_aplicacion.fragments.SelectorFragment;
import static android.R.id.toggle;
import static com.example.luisenrique.clase_aplicacion.R.id.appBarLayout;
import static com.example.luisenrique.clase_aplicacion.R.id.drawer_layout;
public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private RecyclerView recyclerView;
private RecyclerView.LayoutManager layoutManager;
private AdaptadorLibrosFiltro adaptador;
private AppBarLayout appBarLayout;
private TabLayout tabs;
private DrawerLayout drawer;
private ActionBarDrawerToggle toggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if((findViewById(R.id.contenedor_pequeno)!=null) && (getSupportFragmentManager().findFragmentById(R.id.contenedor_pequeno)==null)){
SelectorFragment primerFragment=new SelectorFragment();
getSupportFragmentManager().beginTransaction().add(R.id.contenedor_pequeno,primerFragment).commit();
}
adaptador=((Aplicacion)getApplicationContext()).getAdaptador();
appBarLayout=(AppBarLayout)findViewById(R.id.appBarLayout);
//Pestañas
TabLayout tabs=(TabLayout)findViewById(R.id.tabs);
tabs.addTab(tabs.newTab().setText("Todos"));
tabs.addTab(tabs.newTab().setText("Nuevos"));
tabs.addTab(tabs.newTab().setText("Leidos"));
tabs.setTabMode(TabLayout.MODE_SCROLLABLE);
tabs.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener(){
#Override
public void onTabSelected(TabLayout.Tab tab){
switch (tab.getPosition()){
case 0: //Todos
adaptador.setNovedad(false);
adaptador.setLeido(false);
break;
case 1: //Nuevos
adaptador.setNovedad(true);
adaptador.setLeido(false);
break;
case 2: //Leidos
adaptador.setNovedad(false);
adaptador.setLeido(true);
break;
}
adaptador.notifyDataSetChanged();
}
#Override
public void onTabUnselected(TabLayout.Tab tab){}
#Override
public void onTabReselected(TabLayout.Tab tab){}
});
Toolbar toolbar=(Toolbar)findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer=(DrawerLayout)findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle=new ActionBarDrawerToggle(this,drawer,toolbar,R.string.drawer_open,R.string.drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView=(NavigationView)findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#SuppressWarnings("StatementWithEmptyBody")
#Override
public boolean onNavigationItemSelected(MenuItem item){
int id=item.getItemId();
if(id==R.id.nav_todos){
adaptador.setGenero("");
adaptador.notifyDataSetChanged();
}
else if(id==R.id.nav_epico){
adaptador.setGenero(Libro.G_EPICO);
adaptador.notifyDataSetChanged();
}
else if(id==R.id.nav_XIX){
adaptador.setGenero(Libro.G_S_XIX);
adaptador.notifyDataSetChanged();
}
else if(id==R.id.nav_suspense){
adaptador.setGenero(Libro.G_SUSPENSE);
adaptador.notifyDataSetChanged();
}
DrawerLayout drawer=(DrawerLayout)findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
#Override
public void onBackPressed(){
DrawerLayout drawer=(DrawerLayout)findViewById(R.id.drawer_layout);
if(drawer.isDrawerOpen(GravityCompat.START)){
drawer.closeDrawer(GravityCompat.START);
}
else{
super.onBackPressed();
}
}
}
<!--activity main.xml-->
the main activity is where the main view will be shown and it will be linked to app_bar_main_xml where the other components are located that have no relation to the navigation drawer and work correctly and therefore I will not put the code.
<?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"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!--El contenido de la actividad-->
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<!--El contenido del navigation drawer-->
<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>
<!--nav header-->
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="160dp"
android:background="#color/colorAccent"
android:gravity="bottom"
android:orientation="vertical"
android:paddingBottom="16dp"
android:paddingLeft="?attr/listPreferredItemPaddingLeft"
android:paddingRight="?attr/listPreferredItemPaddingRight"
android:paddingTop="16dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="16dp"
android:src="#android:drawable/sym_def_app_icon"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="16dp"
android:text="Audiolibros"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"/>
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="http://www.androidcurso.com"/>
</LinearLayout>
<!--menu activity_main_drawer.xml-->
in the menu you will see how the navigation drawer will be sectioned. what items will be available and how they will be grouped.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item android:id="#+id/nav_todos"
android:icon="#android:drawable/ic_menu_gallery"
android:title="Todos los generos"/>
<item android:id="#+id/nav_epico"
android:icon="#android:drawable/ic_menu_gallery"
android:title="Poema épico"/>
<item android:id="#+id/nav_XIX"
android:icon="#android:drawable/ic_menu_gallery"
android:title="Literatura siglo XIX"/>
<item android:id="#+id/nav_suspense"
android:icon="#android:drawable/ic_menu_gallery"
android:title="Suspense"/>
</group>
<item android:title="Acciones adicionales">
<menu>
<item android:id="#+id/nav_preferencias"
android:icon="#android:drawable/ic_menu_manage"
android:title="Preferencias"/>
<item android:id="#+id/nav_compartir"
android:icon="#android:drawable/ic_menu_share"
android:title="Compartir"/>
</menu>
</item>
</menu>
It is to call the texts that are required in other classes, there are only two that are called opening and closing.
<!--Strings-->
<resources>
<string name="app_name">Clase_Aplicacion</string>
<string name="drawer_open">navigation drawer abierto</string>
<string name="drawer_close">navigation drawer cerrado</string>
</resources>

Toolbar image error

It's apparently a question that has been asked multiple times, but only has solutions on a case-by-case basis.I am making an aap with toolbar and when i go to second activity i want the toolbar to display icon as well as settings menu but unfortunately toolbar is appearing but icons are not showing also android monitor shows null pointer exception on these lines of code
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
Error pic
This is my activity_main
<?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="com.example.zaina.toolbar.MainActivity">
<include android:id="#+id/aap_bar" layout="#layout/aap_bar"></include>
<TextView
android:layout_below="#id/aap_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</RelativeLayout>
This is my MainActivity.java
package com.example.zaina.toolbar;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
Toolbar toolbar;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.aap_bar);
setSupportActionBar(toolbar);
}
#Override
public boolean onCreateOptionsMenu(Menu item) {
getMenuInflater().inflate(R.menu.menu_main, item);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem menuItem){
int id=menuItem.getItemId();
if(R.id.action_favorite==id){
startActivity(new Intent(this,aap.class));
return true;
}
if(R.id.action_settings==id){
Toast.makeText(MainActivity.this, "Hey you hit", Toast.LENGTH_SHORT).show();
return true;
}
return onOptionsItemSelected(menuItem);
}
}
This is my aapbar_xml.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:aap="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="#color/colorPrimary"
aap:Theme="#style/MyCustom"
app:popupTheme="#style/ThemeOverlay.AppCompat.Dark">
</android.support.v7.widget.Toolbar>
This is my activity_aap.xml
<?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="com.example.zaina.toolbar.aap">
<include android:id="#+id/app_bar" layout="#layout/aap_bar"></include>
</RelativeLayout>
This is aap.java
package com.example.zaina.toolbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
public class aap extends AppCompatActivity{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_aap);
Toolbar toolbar= (Toolbar) findViewById(R.id.aap_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
#Override
public boolean onCreateOptionsMenu(Menu item) {
getMenuInflater().inflate(R.menu.menu_sub, item);
return true;
}
}
This is my menu_sub.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aap="http://schemas.android.com/apk/res-auto">
<item android:id="#+id/za"
android:icon="#drawable/ic_chevron_left_black_24dp"
android:title="left"
aap:showAsAction="ifRoom"/>
<item android:id="#+id/zee"
android:title="sett"
aap:showAsAction="never"/>
</menu>

There may be few reasons of NullPointException, try to:
You are probably using a Theme that doesn't support ActionBar.
Trying using this theme:
android:theme="#android:style/Theme.Holo.Light".
try to catch:
if (getSupportActionBar() != null)
{
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
Or, try to change the id of app_bar in aap.java

findViewById method returning null.
Add id attribute to your toolbar
android:id="#+id/aap_bar
You are also using wrong namespace aap
Use app
xmlns:app="http://schemas.android.com/apk/res-auto"

Android drag margin for navigation drawer is off screen

I have recently created an app called Hoops and I have been developing it for quite some time now. However, the main problem that I seem to be getting, is that the navigation drawer's swipe margin is off screen and other users find it incredibly hard to use the navigation drawer's swipe feature. The menu button works just fine though. I have looked at other tutorials online and all of them seem to be showing the same answer as the one in the forum I have linked: Set drag margin for Android Navigation Drawer
However, I have tried this solution, and it does not seem to be working for me. If anyone has any ideas why it is not working please can you help me out. Here is the coding for the Main activity with the navigation drawer below:
package com.jehan.sportstutorials;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
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.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
DrawerLayout drawerLayout;
Toolbar toolbar;
ActionBar actionBar;
TextView textView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
actionBar = getSupportActionBar();
actionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp);
actionBar.setDisplayHomeAsUpEnabled(true);
drawerLayout = (DrawerLayout) findViewById(R.id.navigation_drawer_layout);
NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view);
if (navigationView != null) {
setupNavigationDrawerContent(navigationView);
}
setupNavigationDrawerContent(navigationView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
drawerLayout.openDrawer(GravityCompat.START);
return true;
}
return super.onOptionsItemSelected(item);
}
private void setupNavigationDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
textView = (TextView) findViewById(R.id.textView);
switch (menuItem.getItemId()) {
case R.id.item_navigation_drawer_basketball:
menuItem.setChecked(true);
textView.setText(menuItem.getTitle());
drawerLayout.closeDrawer(GravityCompat.START);
Intent i = new Intent(MainActivity.this, BasketballTutorial.class);
startActivity(i);
return true;
case R.id.item_navigation_drawer_help:
menuItem.setChecked(true);
textView.setText(menuItem.getTitle());
drawerLayout.closeDrawer(GravityCompat.START);
Intent intent2 = new Intent(MainActivity.this, HelpScreen.class);
startActivity(intent2);
return true;
}
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"
android:id="#+id/navigation_drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="#bool/fitsSystemWindows">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="#dimen/status_bar_kitkat_height"
android:background="?colorPrimary"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="?colorPrimaryDark"/>
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="#string/welcome"
android:textAppearance="#style/TextAppearance.AppCompat.Display1"
android:textColor="#color/md_text"
android:singleLine="false"
android:padding="20dp"
android:gravity="center"
android:textStyle="bold"
android:textIsSelectable="false" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center|bottom"
android:text="#string/swipe"
android:textAppearance="#style/TextAppearance.AppCompat.Display1"
android:textColor="#color/md_text"
android:singleLine="false"
android:padding="20dp"
android:gravity="center"
android:textSize="20sp"
android:textStyle="italic"
android:layout_marginBottom="30dp"/>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="25dp"
android:background="?colorPrimaryDark"/>
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:minHeight="?attr/actionBarSize"
android:background="#drawable/action_bar_color"
android:elevation="4dp"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light"
app:theme="#style/ToolbarTheme"
android:layout_marginTop="25dp"/>
</FrameLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="#bool/fitsSystemWindows"
app:headerLayout="#layout/navigation_drawer_header"
app:menu="#menu/navigation_drawer_menu"
app:theme="#style/NavigationViewTheme" />
If anyone wants a live example of the navigation drawers swipe feature not working you can test out my app in the app store. Here is the link: https://play.google.com/store/apps/details?id=com.jehan.sportstutorials
Summary: Does anyone know how to increase the navigation drawers drag margin, however not following the conventional methods stated in the link in my first paragraph? Help would be appreciated.

Check your R.layout.activity_main layout. Android Studio IDE, for some reason, sets 15dp margin to the topmost container of automatically-created Activity layouts. This could interfere with the Drawer.
Just check if the topmost Relative/Frame/Whichever Layout has any android:layout_marginX attributes set and remove them.