title: Error while fetching http://schemas.android.com/apk/res/android
body: <p>Ok so I was going through a tutorial online, then when i tried to change my build.gradle file to compileSdkVersion 21 instead of 23 everything lost the plot and now all my previous projects etc are all showing errors.</p>
  
  <p>In the AndroidManifest.xml the 2 <strong>http</strong> lines and all the <strong>android:</strong>  are all red and the the activity opening tag has a red squiggly line under it also. I have zero idea what i have done wrong! Almost like internet has gone? Just a noob so i have no idea please help!</p>
  
  
  
  <pre><code>&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:android="http://schemas.android.com/tools"
            package="com.site.project" &gt;
  
      &lt;application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme" &gt;
  
          &lt;activity
              android:name=".MainActivity"
              android:label="@string/app_name"&gt;
  
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
                  &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
              &lt;/intent-filter&gt;
  
          &lt;/activity&gt;
  
      &lt;/application&gt;
  
  &lt;/manifest&gt;
  </code></pre>