title: Android ID not found, when it is there
body: <p>Android Studio is giving me errors in the Main Activity Java over unresolved symbols or id's. As far as I can see the id's refrenced in the java code exist.</p>
  
  <p>In another app which used these same principles, it worked, I cross refrenced the two apps and could not find anything that stood out.</p>
  
  <p>Here is my java code:</p>
  
  <pre><code>package com.example.android.quizapplication;
  
  import android.support.v7.app.AppCompatActivity;
  import android.os.Bundle;
  import android.view.View;
  import android.widget.EditText;
  import android.widget.SeekBar;
  import android.widget.TextView;
  
  public class QuizMainActivity extends AppCompatActivity {
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_quiz_main);
  }
  public void display(int value) {
      TextView quantityTextView = findViewById(R.id.value_text);
      quantityTextView.setText(value);
  }
  public void slider(View view){
      SeekBar seekBar = (SeekBar)findViewById(R.id.i);
      int Value = seekBar.getProgress();
      EditText text = (EditText)findViewById(R.id.valueText);
  
      String name = text.getText().toString();
      text.setText(Value);
  }
  }
  </code></pre>
  
  <p>Here is my XML: (The id's are there)</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;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"
  tools:context="com.example.android.quizapplication.QuizMainActivity"&gt;
  &lt;RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  &lt;TextView
      android:id="@+id/title"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:text="Quiz"
      android:textAlignment="center"/&gt;
  
  &lt;TextView
      android:id="@+id/question"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:text="What is you favorite color?"
      android:textAlignment="center"
      android:paddingTop="20dp"
      android:textSize="20dp"
      android:textStyle="bold"
  
      android:textColor="#000000"
      android:layout_below="@+id/title"
       /&gt;
      &lt;TextView
          android:id="@+id/value_text"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="Test"
          android:textAlignment="center"
          android:layout_alignParentBottom="true"
          android:layout_marginBottom="300dp"/&gt;
      &lt;SeekBar
          android:id="@+id/i"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_alignParentBottom="true"
          android:layout_centerHorizontal="true"
          android:layout_marginBottom="146dp"
          android:onClick="slider"/&gt;
  
  
  &lt;/RelativeLayout&gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Hello World!"
       /&gt;
  </code></pre>
  
  <p></p>