title: MainActivity.java - errors on start
body: <p>mainactivity.java :</p>
  
  <pre><code> package com.example.sdsdsd;
  
  import android.os.Bundle;
  import android.app.Activity;
   import android.view.Menu;
  
  public class MainActivity extends Activity {
  
     @Override
         protected void onCreate(Bundle savedInstanceState) {
  
       super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
    }
  
      @Override
     public boolean onCreateOptionsMenu(Menu menu) {
          // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.main, menu);
              return true;
         }
  
        }
  </code></pre>
  
  <p>activitymain.xml:</p>
  
  <pre><code>&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"
  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=".MainActivity" &gt;
  
  &lt;TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/hello_world" /&gt;
  </code></pre>
  
  <p></p>
  
  <p>The problem is that is new generated project and everytime theres a problems telling:
  R cannot be resolved to a variable</p>