Error inflating class android.support.v7.widget.Toolbar?

Question

I am trying to get Material Design for my App by following this method.

Whenever I run the App it shows the following error:

Error inflating class android.support.v7.widget.Toolbar.

I checked whether I have added the appcompat properly. But it is all Correct to me. So please tell me what am I doing wrong ?

build.gradle

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion '21.0.2'

    defaultConfig {
        applicationId "io.bxbxbai.feedlistviewdemo"
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            runProguard false
            proguardFiles 'proguard-rules.pro'
        }
    }
}

configurations {
    all*.exclude group: 'com.android.support', module: 'support-v4'
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile project(':materialDesign')
    compile 'com.balysv.materialmenu:material-menu:1.4.0'
    compile 'com.android.support:appcompat-v7:21.+'
}

Logcat

02:11.641  20583-20583/io.bxbxbai.feedlistviewdemo E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: io.bxbxbai.feedlistviewdemo, PID: 20583
    java.lang.RuntimeException: Unable to start activity ComponentInfo{io.bxbxbai.feedlistviewdemo/io.bxbxbai.androiddemos.MainActivity}: android.view.InflateException: Binary XML file line #3: Error inflating class android.support.v7.widget.Toolbar
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2224)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2283)
            at android.app.ActivityThread.access$800(ActivityThread.java:144)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5158)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.view.InflateException: Binary XML file line #3: Error inflating class android.support.v7.widget.Toolbar
            at android.view.LayoutInflater.createView(LayoutInflater.java:620)
            at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
            at android.view.LayoutInflater.parseInclude(LayoutInflater.java:816)
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
            at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
            at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
            at io.bxbxbai.androiddemos.MainActivity.onCreate(MainActivity.java:31)
            at android.app.Activity.performCreate(Activity.java:6144)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2181)
????????????at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2283)
????????????at android.app.ActivityThread.access$800(ActivityThread.java:144)
????????????at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
????????????at android.os.Handler.dispatchMessage(Handler.java:102)
????????????at android.os.Looper.loop(Looper.java:136)
????????????at android.app.ActivityThread.main(ActivityThread.java:5158)
????????????at java.lang.reflect.Method.invokeNative(Native Method)
????????????at java.lang.reflect.Method.invoke(Method.java:515)
????????????at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
????????????at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
????????????at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Constructor.constructNative(Native Method)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
            at android.view.LayoutInflater.createView(LayoutInflater.java:594)
????????????at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
????????????at android.view.LayoutInflater.parseInclude(LayoutInflater.java:816)
????????????at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
????????????at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
????????????at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
????????????at io.bxbxbai.androiddemos.MainActivity.onCreate(MainActivity.java:31)
????????????at android.app.Activity.performCreate(Activity.java:6144)
????????????at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
????????????at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2181)
????????????at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2283)
????????????at android.app.ActivityThread.access$800(ActivityThread.java:144)
????????????at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
????????????at android.os.Handler.dispatchMessage(Handler.java:102)
????????????at android.os.Looper.loop(Looper.java:136)
????????????at android.app.ActivityThread.main(ActivityThread.java:5158)
????????????at java.lang.reflect.Method.invokeNative(Native Method)
????????????at java.lang.reflect.Method.invoke(Method.java:515)
????????????at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
????????????at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
????????????at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoSuchMethodError: android.support.v4.content.ContextCompat.getDrawable
            at android.support.v7.internal.widget.TintManager.getDrawable(TintManager.java:133)
            at android.support.v7.internal.widget.TintTypedArray.getDrawable(TintTypedArray.java:62)
            at android.support.v7.widget.Toolbar.<init>(Toolbar.java:248)
            at android.support.v7.widget.Toolbar.<init>(Toolbar.java:190)
????????????at java.lang.reflect.Constructor.constructNative(Native Method)
????????????at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
????????????at android.view.LayoutInflater.createView(LayoutInflater.java:594)
????????????at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
????????????at android.view.LayoutInflater.parseInclude(LayoutInflater.java:816)
????????????at android.view.LayoutInflater.rInflate(LayoutInflater.java:745)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
????????????at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
????????????at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228)
????????????at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102)
????????????at io.bxbxbai.androiddemos.MainActivity.onCreate(MainActivity.java:31)
????????????at android.app.Activity.performCreate(Activity.java:6144)
????????????at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
????????????at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2181)
????????????at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2283)
????????????at android.app.ActivityThread.access$800(ActivityThread.java:144)
????????????at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
????????????at android.os.Handler.dispatchMessage(Handler.java:102)
????????????at android.os.Looper.loop(Looper.java:136)
????????????at android.app.ActivityThread.main(ActivityThread.java:5158)
????????????at java.lang.reflect.Method.invokeNative(Native Method)
????????????at java.lang.reflect.Method.invoke(Method.java:515)
????????????at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
????????????at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
????????????at dalvik.system.NativeStart.main(Native Method)

EDIT

toolbar.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimaryDark"/>

activity_main.xml

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity"
        tools:ignore="MergeRootFrame">

        <include android:id="@+id/toolbar" layout="@layout/toolbar" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/btn_feed_list_demo"
            android:text="@string/feed_list_demo"/>

    </RelativeLayout>

Answer 1

If you are using new androidx implementations, when typing Toolbar, the Studio will autocomplete it to android.support.v7.widget.Toolbar, but you should use androidx.appcompat.widget.Toolbar instead, otherwise you will get this error.