Develop Reference

This Activity already has an action bar supplied by the window

I have a problem with my Navigation Drawer.
my project First run by splash page and Then show Navigation Drawer.
When I compile my application the following error messages :
AndroidRuntime: FATAL EXCEPTION: main
Process: ir.mosayebtorabi.sapp, PID: 4793
java.lang.RuntimeException: Unable to start activity ComponentInfo{ir.mosayebtorabi.sapp/com.loridic.ir.loridic.MainActivity}: 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.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2327)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$800(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5293)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
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.
at android.support.v7.app.AppCompatDelegateImplV9.setSupportActionBar(AppCompatDelegateImplV9.java:201)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:129)
at com.loridic.ir.loridic.MainActivity.onCreate(MainActivity.java:25)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2280)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392) 
at android.app.ActivityThread.access$800(ActivityThread.java:153) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1305) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:135) 
at android.app.ActivityThread.main(ActivityThread.java:5293) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698) 
activity_splash_screen.xml Contains:
<?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"
android:background="#color/colorPrimaryDark"
tools:context="com.loridic.ir.loridic.SplashScreen">
<ImageView
android:id="#+id/image"
android:layout_width="200dp"
android:layout_height="200dp"
android:src="#drawable/lorvajeh"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.4"
android:contentDescription="#string/lorem_ipsum" />
<TextView
android:id="#+id/welcomeText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/welcome_screen"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/image"
app:layout_constraintVertical_bias="0.2"
android:textSize="22sp"
android:textColor="#color/colorWhite"
android:textStyle="bold"/>
activity_splash_screen class Contains:
package com.loridic.ir.loridic;
import android.app.Activity;`
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.TextView;
public class SplashScreen extends AppCompatActivity {
Handler handler;
public static Activity fa;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash_screen);
fa = this;
ImageView iv = findViewById(R.id.image);
TextView tv = findViewById(R.id.welcomeText);
Animation animation = AnimationUtils.loadAnimation(this, R.anim.splashtransition);
iv.startAnimation(animation);
tv.startAnimation(animation);
Splashregister();
}
public void Splashregister() {
handler = new Handler();
{
handler.postDelayed(new Runnable() {
#Override
public void run() {
fa.finish();
startActivity(new Intent(SplashScreen.this, MainActivity.class));
}
}, 4000);
}
}
}
styles.xml Contains:
<resources>
<!-- 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/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>
MainActivity class Contains:
package com.loridic.ir.loridic;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
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.FrameLayout;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
FrameLayout frameLayout;
FragmentManager fragmentManager=getSupportFragmentManager();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
frameLayout=(FrameLayout)findViewById(R.id.frmlayoutview);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open,
R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
#Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
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
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.SentWord) {
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.frmlayoutview,new FragmentClassAddWord());
ft.commit();
} else if (id == R.id.Target) {
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.frmlayoutview,new FragmentClassAbout());
ft.commit();
} else if (id == R.id.PersonalInformation) {
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.frmlayoutview,new FragmentClassRegistername());
ft.commit();
} else if (id == R.id.Share) {
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.frmlayoutview,new FragmentClassShare());
ft.commit();
} else if (id == R.id.About) {
FragmentTransaction ft=fragmentManager.beginTransaction();
ft.replace(R.id.frmlayoutview,new FragmentClassMaker());
ft.commit();
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
MainActivity xml Contains:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="#layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="#+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="#layout/nav_header_main"
app:menu="#menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
AndroidManifest.xml Contains:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.loridic.ir.loridic">
<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=".SplashScreen"
android:label="LoreVajeh"
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=".Activityaddword" />
<activity android:name=".Activityregistername" />
<activity android:name=".Activityabout" />
<activity android:name=".Activitymaker" />
<activity android:name=".Activityshareapp" />
<activity android:name=".MainActivity"></activity>
</application>
</manifest>

As you are supplying a toolbar in your MainActivity you need to turn the default one off in the AndroidManifest.xml file
e.g.
<activity
android:name=".MainActivity"
android:theme="#style/AppTheme.NoActionBar" />

Error inflating class android.support.design.widget.AppBarLayout

I tried to create a game show the pictures and list of character name it. But when I run the app, it keeps crashing and show the error:
Error inflating class android.support.design.widget.AppBarLayout.
Here is the log:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.celebguess, PID: 3166
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.celebguess/com.example.user.celebguess.MainActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class android.support.design.widget.AppBarLayout
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.AppBarLayout" on path: DexPathList[[zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/base.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.user.celebguess-t-FEyHBoSS08L3kZz9tsZg==/lib/x86, /system/lib, /vendor/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.view.LayoutInflater.createView(LayoutInflater.java:606)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:287)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
at com.example.user.celebguess.MainActivity.onCreate(MainActivity.java:36)
at android.app.Activity.performCreate(Activity.java:6975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
E/AndroidRuntime: at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1593)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Here is the activity_main.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"
android:orientation="vertical"
tools:context="com.example.user.celebguess.MainActivity">
<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_main" />
/>
Also here is the styles.xml:
<resources>
<!-- 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/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" />
Also here is the main_activity.java for the Java part:
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Map;
public class MainActivity extends AppCompatActivity {
private GridView gridView;
private SharedPreferences preferences;
private ArrayAdapter<String> names;
private Toast currentToast;
private ImageView img;
private int numberOfChoice;
private ArrayList<String> nameList;
private ArrayList<Integer> photos;
private ArrayList<String> nameForChoose;
private Map<String,Integer> nameMap;
private int currentPicNumber;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
#Override
protected void onStart() {
super.onStart();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
int orientation = getResources().getConfiguration().orientation;
if(orientation== Configuration.ORIENTATION_PORTRAIT) {
getMenuInflater().inflate(R.menu.menu_main, menu);
}
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent intent = new Intent(this,Settings.class);
startActivity(intent);
return true;
}
return super.onOptionsItemSelected(item);
}

For latest version of android, in build.gradle(app)
implementation 'com.android.support:design:30.0.0'
and for usage, in your .xml:
<com.google.android.material.appbar.AppBarLayout

Add below to bulid.gradle:app module :
implementation 'com.android.support:design:28.0.0'

## design library here you can copy and add to your build.gradle file
implementation 'com.android.support:design:28.0.0'

Android - App crashes when I add submenu

I tried to add a submenu on products and the app crashes on start. The problem comes from the submenu created. I dont understand why.
NavigationMenu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/nav_home"
android:title="Home" />
<item android:title="Products"
android:id="#+id/nav_products">
<menu>
<item android:id="#+id/nav_tubeBendingMachines"
android:title="Tub" />
<item android:id="#+id/nav_sectionBendingRolls"
android:title="Sect" />
</menu>
</item>
<item android:id="#+id/nav_tube_data"
android:title="Tube Data" />
<item android:id="#+id/nav_tool_setup"
android:title="Tool Setup" />
<item android:id="#+id/nav_mandrel"
android:title="Mandrel" />
<item android:id="#+id/nav_archive"
android:title="Archive" />
<item android:id="#+id/nav_tool_notes"
android:title="Tool Notes" />
<item android:id="#+id/nav_converter"
android:title="Converter" />
<item android:id="#+id/nav_bend_guide"
android:title="Bend Guide" />
<item android:id="#+id/nav_contact"
android:title="Contact Us" />
<item android:id="#+id/nav_settings"
android:title="Settings"
android:icon="#mipmap/ic_settings_black_24dp"/>
</menu>
Main
public class MainActivity extends AppCompatActivity {
//Side menu
private DrawerLayout mDrawerLayout;
//button side menu
private ActionBarDrawerToggle mToggle;
//toolbar
private Toolbar mToolbar;
//Fragments
FragmentTransaction fragmentTransaction;
NavigationView navigationView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mToolbar = (Toolbar) findViewById(R.id.nav_action);
setSupportActionBar(mToolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
mToggle = new ActionBarDrawerToggle(this,mDrawerLayout, R.string.open,R.string.close);
mDrawerLayout.addDrawerListener(mToggle);
mToggle.syncState();
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
//fragments transaction
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.main_container,new HomeFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Home");
//select which fragment to show based on item id
navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
switch (item.getItemId())
{
case R.id.nav_home:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new HomeFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Home");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_settings:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new SettingsFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Settings");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_contact:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new ContactUsFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Contact Us");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_tube_data:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new TubeDataFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Tube Data");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_archive:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new ArchiveFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Archive");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_bend_guide:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new BendGuideFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Bend Guide");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_mandrel:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new MandrelFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Mandrel");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_tool_setup:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new ToolSetupFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Tool Setup");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
case R.id.nav_products:
fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.main_container,new ProductsFragment());
fragmentTransaction.commit();
getSupportActionBar().setTitle("Products");
item.setChecked(true);
mDrawerLayout.closeDrawers();
break;
}
return true;
}
});
}
//toggle para o menu
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(mToggle.onOptionsItemSelected(item))
{
return true;
}
return super.onOptionsItemSelected(item);
}
}
CRASH LOGS :
04-20 10:40:45.923 6040-6040/com.example.tiagosilva.amob_android E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.tiagosilva.amob_android, PID: 6040
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.tiagosilva.amob_android/com.example.tiagosilva.amob_android.MainActivity}: android.view.InflateException: Binary XML file line #38: Binary XML file line #38: Error inflating class android.support.design.widget.NavigationView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: android.view.InflateException: Binary XML file line #38: Binary XML file line #38: Error inflating class android.support.design.widget.NavigationView
Caused by: android.view.InflateException: Binary XML file line #38: Error inflating class android.support.design.widget.NavigationView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:292)
at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.example.tiagosilva.amob_android.MainActivity.onCreate(MainActivity.java:34)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.ClassCastException: android.support.design.internal.NavigationMenuPresenter$NavigationMenuSeparatorItem cannot be cast to android.support.design.internal.NavigationMenuPresenter$NavigationMenuTextItem
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.appendTransparentIconIfMissing(NavigationMenuPresenter.java:540)
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.prepareMenuItems(NavigationMenuPresenter.java:527)
at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.update(NavigationMenuPresenter.java:460)
at android.support.design.internal.NavigationMenuPresenter.updateMenuView(NavigationMenuPresenter.java:117)
at android.support.design.widget.NavigationView.inflateMenu(NavigationView.java:252)
04-20 10:40:45.923 6040-6040/com.example.tiagosilva.amob_android E/AndroidRuntime:
at android.support.design.widget.NavigationView.<init>(NavigationView.java:174)
at android.support.design.widget.NavigationView.<init>(NavigationView.java:100)
... 25 more
XXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXxXXXXXXXXXXXx

Caused by: android.view.InflateException: Binary XML file line #38:
Binary XML file line #38: Error inflating class
android.support.design.widget.NavigationView
Caused by:
android.view.InflateException: Binary XML file line #38: Error
inflating class android.support.design.widget.NavigationView
REASON:
The problem is in your NavigationMenu.xml. Item nav_settings causes the InflateException. This happened because this item has icon but the above items does not has icons and you have not grouped them together.
SOLUTION:
To solve this InflateException, put menu items nav_tube_data to nav_contact into a group and also you have to give an id to group.
Here is the working XML code:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="#+id/nav_home"
android:title="Home" />
<item android:title="Products"
android:id="#+id/nav_products">
<menu>
<item android:id="#+id/nav_tubeBendingMachines"
android:title="Tub" />
<item android:id="#+id/nav_sectionBendingRolls"
android:title="Sect" />
</menu>
</item>
<group
android:checkableBehavior="none"
android:id="#+id/group_one">
<item android:id="#+id/nav_tube_data"
android:title="Tube Data" />
<item android:id="#+id/nav_tool_setup"
android:title="Tool Setup" />
<item android:id="#+id/nav_mandrel"
android:title="Mandrel" />
<item android:id="#+id/nav_archive"
android:title="Archive" />
<item android:id="#+id/nav_tool_notes"
android:title="Tool Notes" />
<item android:id="#+id/nav_converter"
android:title="Converter" />
<item android:id="#+id/nav_bend_guide"
android:title="Bend Guide" />
<item android:id="#+id/nav_contact"
android:title="Contact Us" />
</group>
<item android:id="#+id/nav_settings"
android:title="Settings"
android:icon="#drawable/ic_settings_black_24dp"/>
</menu>
OUTPUT:
One suggestion, don't put your resource icons in mipmap folder. mipmap is only for launcher icons. For other resource icons you should use drawable folder.
UPDATE:
I wanted to click Products and it goes to the page showing all the
items related to Products. There is no way to make Products clickable
like the other items like Home, etc...?
Try this:
..................
.............................
<group
android:checkableBehavior="none"
android:id="#+id/group_two">
<item android:title="Products"
android:id="#+id/nav_products" />
<item android:id="#+id/nav_tubeBendingMachines"
android:title="Tub" />
<item android:id="#+id/nav_sectionBendingRolls"
android:title="Sect" />
</group>
................
.......................
Hope this will help~

Error with Navigation Drawer

Hello I am a young Belgian developer and follow currently a tutorial on YouTube to create a Drawer Navigation but I get errors when launching the emulator due.
This is the Tutorial.
Here are the errors :
02-10 11:31:12.432 2297-2297/com.example.flori.mylordring E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.flori.mylordring, PID: 2297
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.flori.mylordring/com.example.flori.mylordring.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayShowHomeEnabled(boolean)' on a null object reference
at com.example.flori.mylordring.MainActivity.onCreate(MainActivity.java:31)
at android.app.Activity.performCreate(Activity.java:6237)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
And Main code :
package com.example.flori.mylordring;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
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.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageButton;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
private static ImageButton imgView;
private int test;
int [] images = {R.drawable.im1,R.drawable.im2,R.drawable.im3,R.drawable.im4,R.drawable.im5,R.drawable.im6,R.drawable.im7};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
DrawerLayout drawerLayout = (DrawerLayout)findViewById(R.id.drawerLayout);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Snackbar.make(view, "Rolololo", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
public void image(View view){
imgView=(ImageButton)findViewById(R.id.imageButton);
imgView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v){
test++;
test = test % images.length;
imgView.setImageResource(images[test]);
}
}
);
}
#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 code (I have 2 different activities and this is the content_main, i also have activity_main) :
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/drawerLayout"
android:background="#e2656262"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.example.flori.mylordring.MainActivity"
tools:showIn="#layout/activity_main">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/fragmentholder">
</FrameLayout>
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/navlist"
android:background="#dedede"
android:layout_gravity="start"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:id="#+id/textView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<ImageButton
android:onClick="image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imageButton"
android:src="#drawable/im1"
android:background="#android:color/transparent"
android:layout_above="#+id/textView"
android:layout_centerHorizontal="true" />
</android.support.v4.widget.DrawerLayout>
the Manifest code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.flori.mylordring">
<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>
</application>
**</manifest>
and my2 styles.xml :
this is my style.xml :**
<resources>
<!-- 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/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>
Style.xml(V21) :
<resources>>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">#android:color/transparent</item>
</style>
</resources>

In this part of code:
ActionBar actionBar = getSupportActionBar(); //will return null
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);//why set it after you call getSupportActionBar?
As you can see above you are getting the actionbar before set the toolbar as your actionbar, which will return null.
you need to switch those so you will get the reference from your toolbar.

Or in another words, you could use getSupportActionBar():
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); // First initialize the Toolbar
setSupportActionBar(toolbar); // Set as SupportActionBar
getSupportActionBar().setDisplayShowHomeEnabled(true); // do your stuffs
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
And the second problem is:
app:layout_behavior="#string/appbar_scrolling_view_behavior"
Which you set it for Drawer and it shouldn't be there, check this link:
https://github.com/codepath/android_guides/wiki/Handling-Scrolls-with-CoordinatorLayout#expanding-and-collapsing-toolbars
Add an app:layout_behavior to a RecyclerView or any other View capable
of nested scrolling such as NestedScrollView. The support library
contains a special string resource
#string/appbar_scrolling_view_behavior that maps to
AppBarLayout.ScrollingViewBehavior, which is used to notify the
AppBarLayout when scroll events occur on this particular view

Navigation Drawer Not Working with AppCompat Theme

Navigation Drawer Is Not With AppCompactActivity
My Code is
activity_main.xml
<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:id="#+id/drawer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context=".MainActivity">
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
>
<include
android:id="#+id/toolbar"
layout="#layout/tool_bar"
/>
<FrameLayout
android:id="#+id/frame"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="#+id/navigation_view"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_gravity="start"
app:headerLayout="#layout/header"
app:menu="#menu/drawer"
/>
</android.support.v4.widget.DrawerLayout>
content_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="INBOX"
android:padding="8dp"
android:textColor="#fff"
android:background="#color/PrimaryColor"
android:textSize="28sp"
android:id="#+id/textView"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
</RelativeLayout>
tool_bar.xml
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
style="#style/AppTheme"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/PrimaryColor"
android:minHeight="#dimen/abc_action_bar_default_height_material" />
header.xml
<?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="190dp"
android:background="#drawable/background_material"
android:orientation="vertical">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/profile_image"
android:layout_width="76dp"
android:layout_height="76dp"
android:src="#drawable/profile"
app:border_color="#FF000000"
android:layout_marginLeft="24dp"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginStart="24dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Geevarughese"
android:textSize="14sp"
android:textColor="#FFF"
android:textStyle="bold"
android:gravity="left"
android:paddingBottom="4dp"
android:id="#+id/username"
android:layout_above="#+id/email"
android:layout_alignLeft="#+id/profile_image"
android:layout_alignStart="#+id/profile_image" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="nestofrubin#live.com"
android:id="#+id/email"
android:gravity="left"
android:layout_marginBottom="8dp"
android:textSize="14sp"
android:textColor="#fff"
android:layout_alignParentBottom="true"
android:layout_alignLeft="#+id/username"
android:layout_alignStart="#+id/username" />
</RelativeLayout>
MainActivity.java
package com.example.geevarughese.nav;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
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.view.View;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
//Defining Variables
private Toolbar toolbar;
private NavigationView navigationView;
private DrawerLayout drawerLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initializing Toolbar and setting it as the actionbar
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
//Initializing NavigationView
navigationView = (NavigationView) findViewById(R.id.navigation_view);
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
#Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
//Checking if the item is in checked state or not, if not make it in checked state
if(menuItem.isChecked()) menuItem.setChecked(false);
else menuItem.setChecked(true);
//Closing drawer on item click
drawerLayout.closeDrawers();
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()){
//Replacing the main content with ContentFragment Which is our Inbox View;
case R.id.inbox:
Toast.makeText(getApplicationContext(),"Inbox Selected",Toast.LENGTH_SHORT).show();
ContentFragment fragment = new ContentFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.frame,fragment);
fragmentTransaction.commit();
return true;
// For rest of the options we just show a toast on click
case R.id.starred:
Toast.makeText(getApplicationContext(),"Stared Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.sent_mail:
Toast.makeText(getApplicationContext(),"Send Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.drafts:
Toast.makeText(getApplicationContext(),"Drafts Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.allmail:
Toast.makeText(getApplicationContext(),"All Mail Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.trash:
Toast.makeText(getApplicationContext(),"Trash Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.spam:
Toast.makeText(getApplicationContext(),"Spam Selected",Toast.LENGTH_SHORT).show();
return true;
default:
Toast.makeText(getApplicationContext(),"Somethings Wrong",Toast.LENGTH_SHORT).show();
return true;
}
}
});
// Initializing Drawer Layout and ActionBarToggle
drawerLayout = (DrawerLayout) findViewById(R.id.drawer);
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.openDrawer, R.string.closeDrawer){
#Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
#Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
drawerLayout.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessay or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
}
#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);
}
}
ContentFragment.java
package com.example.geevarughese.nav;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Created by Admin on 04-06-2015.
*/
public class ContentFragment extends Fragment {
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.content_fragment,container,false);
return v;
}
}
styles.xml
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat">
<item name="android:colorPrimary">#color/PrimaryColor</item>
<item name="android:colorPrimaryDark">#color/PrimaryDarkColor</item>
<item name="android:statusBarColor">#android:color/transparent</item>
<!-- Customize your theme here. -->
</style>
</resources>
drawer.xml
<?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/inbox"
android:checked="false"
android:icon="#drawable/ic_3d_rotation_black_24dp"
android:title="Inbox" />
<item
android:id="#+id/starred"
android:checked="false"
android:icon="#drawable/ic_accessibility_black_24dp"
android:title="Starred" />
<item
android:id="#+id/sent_mail"
android:checked="false"
android:icon="#drawable/ic_account_balance_black_24dp"
android:title="Sent Mail" />
<item
android:id="#+id/drafts"
android:checked="false"
android:icon="#drawable/ic_account_circle_black_24dp"
android:title="Draft" />
<item
android:id="#+id/allmail"
android:checked="false"
android:icon="#drawable/ic_add_shopping_cart_black_24dp"
android:title="All Mail" />
<item
android:id="#+id/trash"
android:checked="false"
android:icon="#drawable/ic_alarm_add_black_24dp"
android:title="Trash" />
<item
android:id="#+id/spam"
android:checked="false"
android:icon="#drawable/ic_android_black_24dp"
android:title="Spam" />
</group>
</menu>
colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="PrimaryColor">#2196F3</color>
<color name="PrimaryDarkColor">#1976D2</color>
</resources>
I tried everything that i know. but the app doesn't opens.
My logcat error is:
08-19 02:11:09.109 8809-8809/com.example.geevarughese.nav E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.geevarughese.nav, PID: 8809
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.geevarughese.nav/com.example.geevarughese.nav.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:122)
at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:146)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
at com.example.geevarughese.nav.MainActivity.onCreate(MainActivity.java:23)
at android.app.Activity.performCreate(Activity.java:5933)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.geevarughese.nav" >
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Replace your styles.xml file with this.
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:colorPrimary">#color/PrimaryColor</item>
<item name="android:colorPrimaryDark">#color/PrimaryDarkColor</item>
<item name="android:statusBarColor">#android:color/transparent</item>
<!-- Customize your theme here. -->
</style>