title: I have been getting W/System.err: java.net.UnknownHostException: from android studio
body: <p>I have been trying to connect android studio apps to wamp server my sql database. When i perform my test on mobile phone, it has been giving me this error.</p>
  
  <pre><code>W/dalvikvm: VFY: unable to resolve virtual method 424: 
  Landroid/content/res/TypedArray;.getChangingConfigurations ()I
  W/dalvikvm: VFY: unable to resolve virtual method 446:
  Landroid/content/res/TypedArray;.getType (I)I
  W/System.err: java.net.UnknownHostException: 
  http://l92.168.1.2/apexStore2/user_register.php
  </code></pre>
  
  <p>I have been making sure the pc that i run my wamp server and mobile phone i use to test the app connect to the same wifi. I have added this to my manifest file.</p>
  
  <pre><code>&lt;uses-permission android:name="android.permission.INTERNET" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.READ_PHONE_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.READ_CONTACTS" /&gt;
  </code></pre>
  
  <p>This is my url, i have use my ipv4 address. What have seems to be the matter? How should i fix this error?</p>
  
  <pre><code> private static final String LOGIN_URL = "http://l92.168.1.2/apexStore2/user_login.php";
  </code></pre>