title: Android: "@+id/" and "@+id/"
body: <p>According to <a href="https://stackoverflow.com/questions/5025910/difference-between-id-and-id-in-android">this</a> thread I need to use <code>@+id/</code> for the first time to make resource be created.</p>
  
  <p>But what if I forget that this resource was previously created and create it again with <code>@+id/</code>? I have some input and set <code>nextFocusDown</code> for the element that is still not declared.</p>
  
  <pre><code>&lt;EditText 
  ...
  android:nextFocusDown="@+id/myinput2"/&gt;
  </code></pre>
  
  <p>200 lines below I create this element with <code>@+id</code> because I forgot that it's already declared.</p>
  
  <pre><code>&lt;EditText 
  ...
  android:id="@+id/myinput2"/&gt;
  </code></pre>
  
  <p>It works like this but can it cause an issue?</p>