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ListView isn't existing in navigation drawer activity

My ListView isn't coming up in android studio
I need to make a listView in navigation drawer activity's one page
I also need to know how to take an element's id in from another .xml file
I need to use id of imageView in app_content_main.xml file
Which layout is android studio showing? I can't realize it. is it appbar_main.xml file or content.main.xml file. It is considering content.xml file in appbar_main.xml file, but not listView
here is my code in Mainactivity.java file:
package com.example.sede;
enter code here
import android.os.Bundle;
import android.view.View;
import android.view.Menu;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.google.android.material.snackbar.Snackbar;
import com.google.android.material.navigation.NavigationView;
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 com.example.sede.databinding.ActivityMainBinding;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private AppBarConfiguration mAppBarConfiguration;
private ActivityMainBinding binding;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding = ActivityMainBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
setSupportActionBar(binding.appBarMain.toolbar);
binding.appBarMain.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();
}
});
ListView Habits = findViewById(R.id.Habits);
ArrayList<String> names = new ArrayList<String>();
names.add("My name");
names.add("My name");
names.add("My name");
names.add("My name");
ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1);
Habits.setAdapter(arrayAdapter);
Habits.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
});
DrawerLayout drawer = binding.drawerLayout;
NavigationView navigationView = binding.navView;
// 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)
.setOpenableLayout(drawer)
.build();
NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment_content_main);
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_content_main);
return NavigationUI.navigateUp(navController, mAppBarConfiguration)
|| super.onSupportNavigateUp();
}
}
this one is in appbar_main.xml file :
<?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">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/Theme.SEDE.AppBarOverlay">
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="#style/Theme.SEDE.PopupOverlay" />
</com.google.android.material.appbar.AppBarLayout>
<include layout="#layout/content_main" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_marginEnd="#dimen/fab_margin"
android:layout_marginBottom="16dp"
app:srcCompat="#android:drawable/ic_dialog_email" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
this is in content_main.xml file:
enter code here
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:showIn="#layout/app_bar_main">
<fragment
android:id="#+id/nav_host_fragment_content_main"
android:name="androidx.navigation.fragment.NavHostFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:defaultNavHost="true"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:navGraph="#navigation/mobile_navigation" />
<ImageView
android:id="#+id/addingHabit"
style="#style/round"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="270dp"
android:layout_marginTop="550dp"
app:srcCompat="#drawable/plus" />
<ListView
android:id="#+id/Habits"
android:layout_width="match_parent"
android:layout_marginTop="100dp"
android:layout_height="500dp" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:textSize="30dp"
android:text="Today's plans"
android:layout_marginTop="20dp"/>

NavigationDrawer blocks/stops other buttons on the activity

I'm creating an app where once you log in, you can click a button and it leads you to a quiz, however, the Profile activity (activity when you first log in) has a navigation drawer and for some reason, the navigation drawer is blocking the use of the buttons on the Profile that leads to the Quiz activity. Does anyone know how to fix this? If there's anything I can do please let me know. I'm sorry if this is a stupid question this is my first time coding an app.
Profile Java:
package com.example.civis;
import android.content.Intent;
import android.os.PersistableBundle;
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.view.MenuItem;
import android.view.View;
import android.net.Uri;
import android.widget.Button;
public class Profile extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private DrawerLayout drawer;
private Button quizbutton;
private Button enrolbutton1;
//Menu Drawer Set Up
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
quizbutton = (Button) findViewById(R.id.quizbutton);
quizbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openQuiz();
}
});
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();
}
// Menu Drawer Navigation
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.nav_profile: // Profile Page Link
Intent i = new Intent(Profile.this, Profile.class);
startActivity(i);
break;
case R.id.nav_current_mps: // Current MP's Link
Intent mpi = new Intent(Profile.this, CurrentMps.class);
startActivity(mpi);
break;
case R.id.nav_local_board: // Local Board Link
Intent locali = new Intent(Profile.this, LocalBoard.class);
startActivity(locali);
break;
case R.id.nav_referendums: // Referendums Link
Intent referendumi = new Intent(Profile.this, Referendums.class);
startActivity(referendumi);
break;
case R.id.nav_elections: // Elections Link
Intent electioni = new Intent(Profile.this, Election.class);
startActivity(electioni);
break;
case R.id.nav_about_us: // About Us Link
Intent aboutusi = new Intent(Profile.this, AboutUs.class);
startActivity(aboutusi);
break;
case R.id.nav_settings: // Settings Link
Intent settingsi = new Intent(Profile.this, Settings.class);
startActivity(settingsi);
break;
case R.id.nav_signout: // Sign Out Link (Links to Sign In Page)
Intent signouti = new Intent(Profile.this, SignIn.class);
startActivity(signouti);
break;
}
return true;
}
#Override
public void onBackPressed() {
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
public void openQuiz() {
Intent intent = new Intent(this, quiz1.class);
startActivity(intent);
}
}
Profile XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/gradient_background"
android:orientation="vertical"
tools:context=".Profile"
tools:openDrawer="start">
<!-- White Card Style Backing -->
<ImageView
android:layout_width="match_parent"
android:layout_height="550dp"
android:layout_marginTop="195dp"
android:background="#drawable/rounded_rectangle_white" />
<!-- Profile Person Image -->
<ImageView
android:layout_width="wrap_content"
android:layout_height="200dp"
android:layout_marginTop="90dp"
android:src="#drawable/dp_civis"
tools:ignore="MissingConstraints" />
<!-- Name Area -->
<TextView
android:id="#+id/textView3"
android:layout_width="280dp"
android:layout_height="50dp"
android:layout_centerInParent="true"
android:background="#drawable/edit_text_style"
android:text="Name"
android:textAlignment="center"
android:textSize="24sp" />
<!-- Political Compass Quiz Button -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<Button
android:id="#+id/quizbutton"
android:layout_width="280dp"
android:layout_height="50dp"
android:layout_gravity="center"
android:layout_marginTop="160dp"
android:background="#drawable/edit_purple_button_style"
android:gravity="center"
android:text="Political Compass Quiz"
android:textColor="#FFF"
tools:ignore="MissingConstraints" />
</LinearLayout>
<!-- Enrol to Vote Button -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:visibility="visible">
<Button
android:id="#+id/enrolbutton1"
android:layout_width="280dp"
android:layout_height="50dp"
android:layout_gravity="center"
android:layout_marginTop="320dp"
android:background="#drawable/edit_purple_button_style"
android:gravity="center"
android:text="Enrol to Vote"
android:textColor="#FFF"
tools:ignore="MissingConstraints" />
</LinearLayout>
<!-- Menu Drawer-->
<android.support.v4.widget.DrawerLayout
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
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="#00000000"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</LinearLayout>
<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/nav_header"
app:menu="#menu/navigation_menu" />
</android.support.v4.widget.DrawerLayout>
Quiz Java:
package com.example.civis;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
public class quiz1 extends AppCompatActivity {
private TextView countLabel;
private TextView questionLabel;
private Button answerBtnAgree;
private Button answerBtnDisagree;
private String rightAnswer;
private int rightAnswerCount = 0;
private int quizCount = 1;
static final private int QUIZ_COUNT =5;
ArrayList<ArrayList<String>> quizArray = new ArrayList<>();
String quizData[][] = {
// {Question, Choice 1, Choice 2}
{"All firearms should be registered and it should be tougher to get a licence.", "Agree", "Disagree"},
{"16-year-olds are mature enough to make informed decisions so they should be allowed to vote.", "Agree", "Disagree"},
{"It should be compulsory for everyone in New Zealand to be vaccinated against communicable diseases.", "Agree", "Disagree"},
{"We expect too much of NZ’s Police, and some of their work should be done by communities, mental health experts, and social services.", "Agree", "Disagree"},
{"New Zealand’s borders should remain closed to non-citizens until a COVID-19 vaccine is found, even if that takes years.", "Agree", "Disagree"},
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz1);
countLabel = (TextView)findViewById(R.id.countLabel);
questionLabel = (TextView)findViewById(R.id.questionLabel);
answerBtnAgree = (Button)findViewById(R.id.answerBtnAgree);
answerBtnDisagree = (Button)findViewById(R.id.answerBtnDisagree);
// Create quizArray from quizDara
for (int i = 0; i < quizData.length; i++) {
// Prepare array.
ArrayList<String> tmpArray = new ArrayList<>();
tmpArray.add(quizData[i][0]); // Question
tmpArray.add(quizData[i][1]); // Agree
tmpArray.add(quizData[i][2]); // Disagree
// Add tmpArray to quizArray.
quizArray.add(tmpArray);
}
showNextQuiz();
}
public void showNextQuiz() {
// Update quizCountLabel.
countLabel.setText("Q" + quizCount);
// Generate random number between 0 and 1 (quizArray's size -1 )
Random random = new Random();
int randomNum = random.nextInt(quizArray.size());
// Pick one quiz set.
ArrayList<String> quiz = quizArray.get(randomNum);
// Set question and right answer.
// Array format: // {Question, Choice 1, Choice 2,}
questionLabel.setText(quiz.get(0));
rightAnswer = quiz.get(1);
// Remove "Question" from quiz and Shuffle choices
quiz.remove(0);
// Set Choices.
answerBtnAgree.setText(quiz.get(0));
answerBtnDisagree.setText(quiz.get(1));
// Remove this quiz from quizArray.
quizArray.remove(randomNum);
}
public void checkAnswer(View view) {
// Get pushed button.
Button answerBtn = (Button) findViewById(view.getId());
String btnText = answerBtn.getText().toString();
String alertTitle;
if(btnText.equals(rightAnswer)) {
alertTitle = "Thank you for responding";
rightAnswerCount++;
} else {
alertTitle = "Thank you for responding";
}
// Create Dialogue
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(alertTitle);
builder.setMessage("Your response has been recorded");
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (quizCount == QUIZ_COUNT) {
Intent intent = new Intent(getApplicationContext(), ResultActivity.class);
intent.putExtra("RIGHT_ANSWER_COUNT", rightAnswerCount);
startActivity(intent);
} else {
quizCount++;
showNextQuiz();;
}
}
});
builder.setCancelable(false);
builder.show();
}
}
Quiz XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".quiz1"
android:gravity="center_horizontal"
android:orientation="vertical"
android:background="#drawable/gradient_background">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/countLabel"
android:text="Q1"
android:textSize="28dp"
android:textColor="#android:color/background_light"
android:layout_marginTop="120dp"/>
<TextView
android:id="#+id/questionLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Question"
android:textSize="20dp"
android:layout_gravity="center_horizontal"
android:textColor="#android:color/background_light"
android:layout_marginTop="15dp"/>
<Button
android:id="#+id/answerBtnAgree"
android:layout_width="320dp"
android:layout_height="60dp"
android:layout_marginTop="90dp"
android:text="Agree"
android:background="#drawable/rounded_button"
android:onClick="checkAnswer"/>
<Button
android:id="#+id/answerBtnDisagree"
android:layout_width="320dp"
android:layout_height="60dp"
android:layout_marginTop="40dp"
android:text="Disagree"
android:background="#drawable/rounded_button"
android:onClick="checkAnswer"/>

DrawerLayout should be the parent if you're using NavigationView.
Put the RelativeLayout inside the DrawerLayout.
Your xml should look something like this:
<!-- Menu Drawer-->
<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">
<!-- OTHER VIEWS -->
<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/nav_header"
app:menu="#menu/navigation_menu" />
</android.support.v4.widget.DrawerLayout>

How to use own layout for navigation drawer activity instead of auto generated layout?

I have a navigation drawer activity, that have automatically generated these activity_student_home2, app_bar_student_home, content_student_home, nav_header_student_home layout files. I have separately created activity_student_home layout.By default the activity java class has the acitivity_student_home2 layout as setContentView. But instead, I want to use the acitivity_student_home layout. If I try to change the setContentView to acitivity_student_home then my navigation drawer view does not work. How can I use the acitivity_student_home layout as setContentView?
activity_student_home layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:background="#drawable/app_back"
tools:context="bd.edu.bubt.regup.StudentHomeActivity">
<LinearLayout
android:layout_centerHorizontal="true"
android:layout_centerVertical="false"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="60dp"
android:id="#+id/linearLayout">
<TextView
android:id="#+id/showtext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="300dp"
android:gravity="center"
android:text="Demo"
android:textSize="24dp"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>
activity_student_home2 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/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_student_home"
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_student_home"
app:menu="#menu/activity_student_home2_drawer" />
</android.support.v4.widget.DrawerLayout>
app_bar_student_home layout:
<?xml version="1.0" encoding="utf-8"?>
<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"
android:background="#drawable/app_back"
tools:context="bd.edu.bubt.regup.StudentHomeActivity">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
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:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_student_home" />
</android.support.design.widget.CoordinatorLayout>
StudentHomeActivity java class:
import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
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;
import android.widget.TextView;
public class StudentHomeActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
String name, id, dept, intake, sec, mail;
TextView showtext;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_student_home2);
showtext = (TextView) findViewById(R.id.showtext); //content of activity_student_home
showtext.setText("Registration is open"); //does not work. Null pointer exception.
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.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(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 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();
if (id == R.id.menu_bvault) {
// Handle the camera action
} else if (id == R.id.menu_account) {
} else if (id == R.id.menu_pass_change) {
} else if (id == R.id.menu_logout) {
} else if (id == R.id.menu_about) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}

Your activity_student_home does not include your DrawerLayout
This is missing
<include
layout="#layout/app_bar_student_home"
android:layout_width="match_parent"
android:layout_height="match_parent" />

The correct way to do what you wish is (if I understand what you are asking for correctly) to use fragments
Inside your app_bar_student_home.xml replace
<include layout="#layout/content_student_home" />
with something like this
<FrameLayout
android:id="#+id/content"
android:layout_width="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:layout_height="match_parent"/>
Then create fragments whose content you wish to show (let's say FragmentA, FragmentB) and set their contentview to the different layouts you wish to show
when you wish to change the content for your activity you can do something like
getSupportFragmentManager().beginTransaction().replace(R.id.content, new FragmentA()).commit();
there's a lot more to it than this,
for example when you wish to send a click event from the fragment to your activity you have to use getActivity() and cast it to the class of your MainActivity or use an interface (preferable)
you can check out this tutorial which should help you
http://www.androiddocs.com/training/basics/fragments/index.html

Content not shown when recycler view is placed below AppBarLayout

I'm making an app where the activity has this layout (which I got off a guide) and its perfect because this is what I wanted. But since I have been unable to display data in it - as you can see with the recycler view put in the layout file.
Here's the 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/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="#+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="#+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light" />
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scrollbars="vertical" />
<android.support.v4.view.ViewPager
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
<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/navheader"
app:menu="#menu/menu_navigation" />
Here's the activity which runs everything:
import android.support.design.widget.NavigationView;
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.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import java.util.ArrayList;
import java.util.List;
public class basics_list extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private List<Basic> basicList = new ArrayList<>();
private RecyclerView recyclerView;
private BasicsAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle(R.string.basics_list_name);
setContentView(R.layout.activity_basics_list);
// Adding Toolbar to Main screen
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// set recycler view
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mAdapter = new BasicsAdapter(basicList);
final RecyclerView.LayoutManager mLayoutManager = new LinearLayoutManager(getApplicationContext());
recyclerView.setLayoutManager(mLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
prepareBasicsData();
// Create Navigation drawer and inflate layout
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
// Adding menu icon to Toolbar
ActionBar supportActionBar = getSupportActionBar();
if (supportActionBar != null) {
supportActionBar.setHomeAsUpIndicator(R.drawable.ic_menu_white_24dp);
supportActionBar.setDisplayHomeAsUpEnabled(true);
}
// Set behavior of Navigation drawer
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
// Set item in checked state
menuItem.setChecked(true);
// TODO: handle navigation
// Closing drawer on item click
mDrawerLayout.closeDrawers();
return true;
}
});
}
private void prepareBasicsData() {
Basic basic = new Basic("one");
basicList.add(basic);
basic = new Basic("two");
basicList.add(basic);
basic = new Basic("three");
basicList.add(basic);
mAdapter.notifyDataSetChanged();
}
}

Try adding a layout_behavior to your RecyclerView
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:scrollbars="vertical" />
See this question for more about placing views within CoordinatorLayouts

Missing Hamburger Icon Android

I tried searching for different answers regarding the hamburger icon, but haven't found anything similar. I'm trying to create a hamburger icon and have been following a tutorial. The code runs fine, but the icon is missing when I open it in the virtual device. Any suggestions are appreciated.
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:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.android.navigationapp.navigationapp.MainActivity"
android:id="#+id/drawerLayout">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:text="Main Layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/textView"
android:layout_gravity="center_vertical"
android:textAlignment="center"
android:textSize="24dp" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
app:menu="#menu/navigation_menu"
android:layout_gravity="start">
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
MainActivity Java
package com.android.navigationapp.navigationapp;
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.os.Bundle;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mToggle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDefaultDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
}