title: android.support.v7.widget.toolbar is not found in java file using android studio?
body: <p>I have created a toolbar xml file and want to add in MainActivity.</p>
  
  <p>i have include toolbar.xml file in MainActivity layout file</p>
  
  <p>Toolbar.xml code:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="match_parent"
      android:layout_height="?attr/actionBarSize"
      android:background="@color/dark_blue"&gt;
  
  &lt;/android.support.v7.widget.Toolbar&gt;
  </code></pre>
  
  <p>Main Activity Xml Layout :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      tools:context="hogwart.harrypotter.bucketdrop.ActivityMain"&gt;
  
      &lt;include
          android:id="@+id/toolbar"
          layout="@layout/toolbar"/&gt;
      &lt;include layout="@layout/empty_drops"/&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Then i want to add toolbar to main activity via java code but here it shows one toolbar :</p>
  
  <pre><code>import android.widget.Toolbar;
  </code></pre>
  
  <p>But support toolbar is not found :</p>
  
  <pre><code>import android.support.v7.widget.Toolbar;
  </code></pre>
  
  <p>Main Activity Code:</p>
  
  <pre><code>import android.os.Bundle;
  import android.support.v7.app.AppCompatActivity;
  import android.widget.Toolbar;
  
  public class ActivityMain extends AppCompatActivity {
  
      Toolbar
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
      }
  }
  </code></pre>
  
  <p>Gradle file code:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion "23.0.2"
  
      defaultConfig {
          applicationId "hogwart.harrypotter.bucketdrop"
          minSdkVersion 15
          targetSdkVersion 23
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.1.0'
  }
  </code></pre>