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Toolbar won't display in Activity

I've set my application theme to be NoActionBar in AndroidManifest.xml because I only want a toolbar in my activity and a few fragments, so I'm willing to set it manually for those.
<application
android:allowBackup="false"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/Theme.AppCompat.Light.NoActionBar">
<activity
android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
I made a view for my toolbar tb.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_height="?attr/actionBarSize"
android:layout_width="match_parent"
android:layout_alignParentTop="true"
android:background="#color/colorPrimary"
app:popupTheme="#style/ThemeOverlay.AppCompat.Light">
<TextView
android:id="#+id/tvTitle"
android:text="Main"
android:textColor="#color/white"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
style="#style/TextAppearance.AppCompat.Widget.ActionBar.Title"
android:layout_gravity="center" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/ivBell"
android:background="#drawable/bell"
android:layout_gravity="right"
android:layout_marginRight="10dp"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true" />
</android.support.v7.widget.Toolbar>
and here's how I set it in the activity:
Toolbar toolbar = (Toolbar) getLayoutInflater().inflate(R.layout.main_toolbar, null);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
But it doesn't show up when I launch my app - any ideas what the problem could be?

Try below code:
In your style.xml
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorAccent</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:splitMotionEvents">false</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
In your AndroidMenifest.xml
<application
android:allowBackup="false"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
In your Activity.java or BaseActivity.java file add following method and call it in onCreate or you can directly put method's code in Activity.java's onCreate:
public void setUpToolbar(String strTitle) {
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setDisplayHomeAsUpEnabled(false);
title = (TextView) toolbar.findViewById(R.id.tvTitle);
title.setText(strTitle);
}
}
Note: Don't forget to include tb.xml file in your activity's .xml file
In your Fragment.java or BaseFragment.java file add following method and call it in onCreateView or you can directly put method's code in Fragment.java's onCreateView:
public void setupToolBarWithBackArrow(Toolbar toolbar, #Nullable String Title) {
ActionBar actionBar;
// If you are using BaseActivity.java then keep below code as it is otherwise replace BaseActivity with Your Activity's name
((BaseActivity) getActivity()).setSupportActionBar(toolbar);
actionBar = ((BaseActivity) getActivity()).getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setHomeAsUpIndicator(R.drawable.ic_back); // Set null if you don't want to show back arrow
}
// Remove this click listener if you set null in setHomeAsUpIndicator(...)
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mActivity.onBackPressed();
}
});
title = (TextView) toolbar.findViewById(R.id.title);
title.setText(Title != null ? Title : "");
}
Note: Don't forget to include tb.xml file in your fragment's .xml file

Open navigation drawer menu in another activity

I have created the navigation drawer menu and now i want it to appear in my main activity.
I have the following code in my main activity:
public class MainActivity extends sideMenu {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FrameLayout contentFrameLayout = (FrameLayout) findViewById(R.id.content_frame);
getLayoutInflater().inflate(R.layout.activity_main, contentFrameLayout);
}}
When i run the app it crashes when entering main activity and it tells this:
**Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.**
It specifies the error is in two places:
Menu activity -
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Main activity -
super.onCreate(savedInstanceState);
If someone can shed some light here i'd be grateful!
EDIT:
Android manifest:
<?xml version="1.0" encoding="utf-8"?>
<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".LoginActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:theme="#style/AppTheme.NoActionBar">
</activity>
<activity android:name=".Registo" />
<activity android:name=".ListaEmpresas" />
<activity android:name=".ListaFavoritos" />
<activity android:name=".Candidaturas" />
<activity
android:name=".sideMenu"
android:label="#string/title_activity_side_menu"
android:theme="#style/AppTheme.NoActionBar"></activity>
</application>
menu activity code:
public class sideMenu extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_side_menu);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(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.navigation_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.side_menu, 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();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout)
findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
Menu 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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/content_frame"/>
</LinearLayout>
<include
layout="#layout/app_bar_side_menu"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_width="250dp"
android:layout_height="match_parent"
android:layout_gravity="start"
app:headerLayout="#layout/nav_header_side_menu"
app:menu="#menu/activity_side_menu_drawer" />
app_bar_side_menu xml:
<?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"
tools:context="amsi.dei.estg.ipleiria.pt.ima.sideMenu">
<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_height="wrap_content"
android:layout_width="match_parent"
android:background="?attr/colorPrimary"
app:popupTheme="#style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<include layout="#layout/content_side_menu" />
</android.support.design.widget.CoordinatorLayout>
Content_side_menu 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="amsi.dei.estg.ipleiria.pt.ima.sideMenu"
tools:showIn="#layout/app_bar_side_menu">
</android.support.constraint.ConstraintLayout>
nav_header_side_menu:
<?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"
android:layout_width="match_parent"
android:layout_height="#dimen/nav_header_height"
android:background="#drawable/side_nav_bar"
android:backgroundTint="#android:color/holo_red_dark"
android:gravity="bottom"
android:orientation="vertical"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:theme="#style/ThemeOverlay.AppCompat.Dark">
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="#dimen/nav_header_vertical_spacing"
app:srcCompat="#mipmap/ic_launcher_round" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/nav_header_vertical_spacing"
android:text="IMA"
android:textAppearance="#style/TextAppearance.AppCompat.Body1" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="NOME USER" />
</LinearLayout>

Your theme already has an ActionBar so you will have to convert it to NoActionBar.
For Whole App:
Open the styles.xml and make sure the last line of the parent has a word NoActionBar for example :
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- changed .DarkActionBar to .NoActionBar -->
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
For An Activity:
Or you can just change it for one particular activity in the Manifest like by adding this atrribute in the Manifest :
android:theme="#style/Theme.AppCompat.Light.NoActionBar"

use this theme.
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>

Android Studios FATAL EXCEPTION: main java.lang.RuntimeException [duplicate]

This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 6 years ago.
I'm new to Android Studios and I had around a week or two with tutorials, although most tutorials are outdated I still try to pursue learning Android Studios. First time asking a question on stackoverflow, anyways I have been trying to create an app that has a fragment navigation drawer. I have been using this tutorial https://guides.codepath.com/android/Fragment-Navigation-Drawer.
I have gotten to the part "Making Status Bar Translucent" but before I started that part, I was suggested to run my app, it failed and gave me a large error. Also I don't know how to extend Fragments like the tutorial stated.
Here is my error from the logcat:
06-09 00:35:01.708 988-988/com.example.drago_000.fragmentnavigationdrawer E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.drago_000.fragmentnavigationdrawer/com.example.drago_000.fragmentnavigationdrawer.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.drago_000.fragmentnavigationdrawer.MainActivity.onPostCreate(MainActivity.java:113)
at android.app.Instrumentation.callActivityOnPostCreate(Instrumentation.java:1142)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2042)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
at android.app.ActivityThread.access$600(ActivityThread.java:130) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:4745) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:511) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
at dalvik.system.NativeStart.main(Native Method) 
Here is my MainActivity.java
package com.example.drago_000.fragmentnavigationdrawer;
import android.content.res.Configuration;
import android.support.design.widget.NavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
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;
public class MainActivity extends AppCompatActivity{
private DrawerLayout mDrawer;
private Toolbar toolbar;
private NavigationView nvDrawer;
private ActionBarDrawerToggle drawerToggle;
private ActionBarDrawerToggle setupDrawerToggle() {
return new ActionBarDrawerToggle(this, mDrawer, toolbar, R.string.drawer_open, R.string.drawer_close);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Set a Toolbar to replace the ActionBar.
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// Find our drawer view
mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);
nvDrawer = (NavigationView) findViewById(R.id.nvView);
// Setup drawer view
setupDrawerContent(nvDrawer);
// Tie DrawerLayout events to the ActionBarToggle
mDrawer.addDrawerListener(drawerToggle);
}
private void setupDrawerContent(NavigationView navigationView) {
navigationView.setNavigationItemSelectedListener(
new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
selectDrawerItem(menuItem);
return true;
}
});
}
public void selectDrawerItem(MenuItem menuItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
Fragment fragment = null;
Class fragmentClass;
switch(menuItem.getItemId()) {
case R.id.nav_first_fragment:
fragmentClass = FirstFragment.class;
break;
case R.id.nav_second_fragment:
fragmentClass = SecondFragment.class;
break;
case R.id.nav_third_fragment:
fragmentClass = ThirdFragment.class;
break;
default:
fragmentClass = FirstFragment.class;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
// Highlight the selected item has been done by NavigationView
menuItem.setChecked(true);
// Set action bar title
setTitle(menuItem.getTitle());
// Close the navigation drawer
mDrawer.closeDrawers();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (drawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
// `onPostCreate` called when activity start-up is complete after `onStart()`
// NOTE! Make sure to override the method with only a single `Bundle` argument
#Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
drawerToggle.syncState();
}
#Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
drawerToggle.onConfigurationChanged(newConfig);
}}
FirstFragment.java
package com.example.drago_000.fragmentnavigationdrawer;
/**
* Created by drago_000 on 6/9/2016.
*/
public class FirstFragment {
}
SecondFragment.java
package com.example.drago_000.fragmentnavigationdrawer;
/**
* Created by drago_000 on 6/9/2016.
*/
public class SecondFragment {
}
ThirdFragment.java
package com.example.drago_000.fragmentnavigationdrawer;
/**
* Created by drago_000 on 6/9/2016.
*/
public class ThirdFragment {
}
activity_main.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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.drago_000.fragmentnavigationdrawer.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
<!-- This DrawerLayout has two children at the root -->
<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">
<!-- This LinearLayout represents the contents of the screen -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!-- The ActionBar displayed at the top -->
<include
layout="#layout/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- The main content view where fragments are loaded -->
<FrameLayout
android:id="#+id/flContent"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<!-- The navigation drawer that comes from the left -->
<!-- Note that `android:layout_gravity` needs to be set to 'start' -->
<android.support.design.widget.NavigationView
android:id="#+id/nvView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:background="#android:color/white"
app:menu="#menu/drawer_view"
app:headerLayout="#layout/nav_header"
/>
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
nav_header.xml
<?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="192dp"
android:background="?attr/colorPrimaryDark"
android:padding="16dp"
android:theme="#style/ThemeOverlay.AppCompat.Dark"
android:orientation="vertical"
android:gravity="bottom">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Header"
android:textColor="#android:color/white"
android:textAppearance="#style/TextAppearance.AppCompat.Body1"/>
</LinearLayout>
toolbar.xml
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
android:minHeight="?attr/actionBarSize"
app:theme="#style/ThemeOverlay.AppCompat.Dark.ActionBar"
android:background="?attr/colorPrimaryDark">
</android.support.v7.widget.Toolbar>
drawer_view.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single">
<item
android:id="#+id/nav_first_fragment"
android:icon="#drawable/ic_one"
android:title="First" />
<item
android:id="#+id/nav_second_fragment"
android:icon="#drawable/ic_two"
android:title="Second" />
<item
android:id="#+id/nav_third_fragment"
android:icon="#drawable/ic_three"
android:title="Third" />
</group>
</menu>
/res/values/v16/styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="android:windowTranslucentStatus">true</item>
</style>
</resources>
/res/values/string.xml
<resources>
<string name="app_name">FragmentNavigationDrawer</string>
<string name="drawer_open">Open navigation drawer</string>
<string name="drawer_close">Close navigation drawer</string>
</resources>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.drago_000.fragmentnavigationdrawer">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Any help will be greatly appreciated! I been having trouble building apps for a very long time! This code was based off this tutorial up to the Making Status Bar Translucent part, https://guides.codepath.com/android/Fragment-Navigation-Drawer

Your drawerToggle is null.Add this line in onCreate():
drawerToggle = setupDrawerToggle();
just after this line:
mDrawer = (DrawerLayout) findViewById(R.id.drawer_layout);

Android Studio - Why does the ActionBar always show, even when fully disabled?

I recently started with Android application development and have come across an issue with the ActionBar. I am aware that this question has been asked a few times, and so I have made the changes necessary from what I can see from the other articles.
Currently, my main activity looks like this: image
As you can see, there is a blue bar at the top of the screen directly under the notification bar where an ActionBar is supposed to be. All of my app themes are (I believe) set to NoActionBar. I would like to get rid of this blue bar so that I can use the entire screen to put my contents.
My code is as follows:
Main_Activity.Java
package ryanpx2016.golftracker;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.content.Intent;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button regularScorePageActivityButton = (Button)findViewById(R.id.scoreSheetButton);
regularScorePageActivityButton.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View view)
{
startActivity(new Intent(MainActivity.this, RegularScorePageActivity.class));
}
});
}
#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)
{
// 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);
}
}
activity_main.xml
<?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:fitsSystemWindows="true"
tools:context=".MainActivity">
<android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
android:layout_width="match_parent" 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_main" />
</android.support.design.widget.CoordinatorLayout>
content_main.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"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:showIn="#layout/activity_main"
tools:context=".MainActivity">
<Button
style="?android:attr/buttonStyleSmall"
android:background="#drawable/scoresheet_button"
android:layout_width="185dp"
android:layout_height="wrap_content"
android:text="#string/scoresheet_button"
android:id="#+id/scoreSheetButton"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<Button
android:background="#drawable/course_buttons"
android:layout_width="185dp"
android:layout_height="wrap_content"
android:text="#string/my_golf_courses_button"
android:id="#+id/myGolfCoursesButton"
android:layout_below="#+id/scoreSheetButton"
android:layout_alignStart="#+id/scoreSheetButton"
android:layout_marginTop="35dp" />
<Button
android:background="#drawable/course_buttons"
android:layout_width="185dp"
android:layout_height="wrap_content"
android:text="#string/my_minigolf_courses_button"
android:id="#+id/myMinigolfCoursesButton"
android:layout_marginTop="35dp"
android:layout_below="#+id/myGolfCoursesButton"
android:layout_centerHorizontal="true" />
</RelativeLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ryanpx2016.golftracker" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".RegularScorePageActivity"
android:label="#string/title_activity_regular_score_page"
android:theme="#style/AppTheme.NoActionBar" >
<intent-filter>
<action android:name="ryanpx2016.golftracker.RegularScorePageActivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>
I believe this may have something to do with a toolbar, but then again, I don't necessarily know what I'm saying :D
Any and all help is greatly appreciated. Thanks!!

Delete this from your activity_main.xml :
<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 - Adding different themes for different activity not being applied

I am new to android. I want to create a app with different theme for all the activities. I searched a lot for this but i cant find the correct solution.
Here the code
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample.webservice" >
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
>
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.sample.webservice.Usermain"
android:label="#string/title_activity_usermain"
android:theme="#style/UserMainTheme"
android:parentActivityName="com.example.sample.webservice.MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.sample.webservice.MainActivity" />
</activity>
</application>
</manifest>
Styles.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="android:background">#color/white</item>
<item name="android:windowBackground">#color/white</item>
<item name="android:colorBackground">#color/white</item>
</style>
<style name="UserMainTheme" parent="android:Theme.Holo.Light">
<item name="android:background">#color/white</item>
<item name="android:windowBackground">#color/white</item>
<item name="android:colorBackground">#color/white</item>
</style>
</resources>
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/imageView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<TextView
android:fontFamily="sans-serif"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/username"
android:id="#+id/textView" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/username"
android:layout_gravity="center_horizontal"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:text="#string/password"
android:id="#+id/textView2" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/password"
android:layout_gravity="right"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/login"
android:id="#+id/login_button"
android:layout_marginTop="#dimen/login_top_margin"
android:layout_gravity="center_horizontal" />
</LinearLayout>
</RelativeLayout>
activity_usermain.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.sample.webservice.Usermain">
<TextView android:text="#string/hello_world" android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
MainActivity.java
package com.example.sample.webservice;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button login = (Button) findViewById(R.id.login_button);
login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
setContentView(R.layout.activity_usermain);
}
});
}
#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) {
// 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);
}
}
Here the screen shot of output:
MainActivity Screen
Usermain Screen
the above two screens having the same theme. Please help me in this thanks in advance

I forgot to start activity with Intent. That's why the style is not applied.
have to change this
public void onClick(View v) {
setContentView(R.layout.activity_usermain);
}
with this one in MainActivity.java
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, Usermain.class);
startActivity(intent);
}
Its working good.

brother i also made an activity that wasn't much complex either just to test this issue but i didn't need to initiate any code. as u have described in the answer. It is working fine for me. All i did was change my Android Manifest file a bit and styles.xml.
after only these 2 changes i was good to go