title: Cannot find my r.java file in android
body: <p>Iam a newbie to android.I had crested an project to check the textfields avaiable in android. I added some resources in string.xml and build the project. My R.java is not generated automatically. I had choosed only "Build Automatically" from project tab. I had cleaned my project many times and restarted eclipse but my r.java is not generated. I cant find any error with my resource folder. Can anybody help me out of this? and also give me some instructions how to work with resource folder if possible?. please refer my activity.xml below.</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  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=".Text_MainActivity"&gt; 
  
  &lt;TextView
      android:id="@+id/textView1"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="@string/hello_world" /&gt;
  
  &lt;EditText
      android:id="@+id/email_address"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_alignLeft="@+id/textView1"
      android:layout_below="@+id/textView1"
      android:layout_marginTop="14dp"
      android:ems="10"
      android:hint="@string/email_hint"
      android:inputType="textEmailAddress"/&gt;
  
  &lt;EditText
      android:id="@+id/launch_codes"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_alignLeft="@+id/email_address"
      android:layout_below="@+id/email_address"
      android:ems="10"
      android:hint="@string/enter_launch_codes"
      android:imeActionLabel="@string/launch"
      android:inputType="number"/&gt;
  
  &lt;EditText
      android:id="@+id/postal_address"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_alignLeft="@+id/launch_codes"
      android:layout_below="@+id/launch_codes"
      android:ems="10"
      android:hint="@string/postal_address_hint"
      android:inputType="textPostalAddress"/&gt;
  
  &lt;AutoCompleteTextView
      android:id="@+id/autocomplete"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_alignLeft="@+id/postal_address"
      android:layout_below="@+id/postal_address"
      android:layout_marginLeft="16dp"
      android:layout_marginTop="18dp"
      android:ems="10"
      android:hint="@string-array/countries_array"&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Thanks in advance</p>